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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2008-04-19 17:17:34 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-04-19 17:17:34 +0100
commitcf816ecb533ab96b883dfdc0db174598b5b5c4d2 (patch)
tree1b7705db288ae2917105e624b01fdf81e0882bf1 /arch/ia64/kernel
parentadf6d34e460387ee3e8f1e1875d52bff51212c7d (diff)
parent15f7d677ccff6f0f5de8a1ee43a792567e9f9de9 (diff)
Merge branch 'merge-fixes' into devel
Diffstat (limited to 'arch/ia64/kernel')
-rw-r--r--arch/ia64/kernel/Makefile2
-rw-r--r--arch/ia64/kernel/acpi.c4
-rw-r--r--arch/ia64/kernel/asm-offsets.c13
-rw-r--r--arch/ia64/kernel/crash.c56
-rw-r--r--arch/ia64/kernel/efi.c46
-rw-r--r--arch/ia64/kernel/entry.S65
-rw-r--r--arch/ia64/kernel/fsys.S88
-rw-r--r--arch/ia64/kernel/head.S20
-rw-r--r--arch/ia64/kernel/ia64_ksyms.c6
-rw-r--r--arch/ia64/kernel/irq_ia64.c2
-rw-r--r--arch/ia64/kernel/ivt.S69
-rw-r--r--arch/ia64/kernel/kprobes.c133
-rw-r--r--arch/ia64/kernel/mca.c60
-rw-r--r--arch/ia64/kernel/mca_asm.S5
-rw-r--r--arch/ia64/kernel/minstate.h14
-rw-r--r--arch/ia64/kernel/numa.c2
-rw-r--r--arch/ia64/kernel/patch.c8
-rw-r--r--arch/ia64/kernel/perfmon.c4
-rw-r--r--arch/ia64/kernel/process.c30
-rw-r--r--arch/ia64/kernel/ptrace.c1217
-rw-r--r--arch/ia64/kernel/semaphore.c165
-rw-r--r--arch/ia64/kernel/setup.c31
-rw-r--r--arch/ia64/kernel/smp.c82
-rw-r--r--arch/ia64/kernel/smpboot.c2
-rw-r--r--arch/ia64/kernel/time.c78
-rw-r--r--arch/ia64/kernel/unaligned.c3
26 files changed, 1596 insertions, 609 deletions
diff --git a/arch/ia64/kernel/Makefile b/arch/ia64/kernel/Makefile
index 33e5a598672..13fd10e8699 100644
--- a/arch/ia64/kernel/Makefile
+++ b/arch/ia64/kernel/Makefile
@@ -6,7 +6,7 @@ extra-y := head.o init_task.o vmlinux.lds
obj-y := acpi.o entry.o efi.o efi_stub.o gate-data.o fsys.o ia64_ksyms.o irq.o irq_ia64.o \
irq_lsapic.o ivt.o machvec.o pal.o patch.o process.o perfmon.o ptrace.o sal.o \
- salinfo.o semaphore.o setup.o signal.o sys_ia64.o time.o traps.o unaligned.o \
+ salinfo.o setup.o signal.o sys_ia64.o time.o traps.o unaligned.o \
unwind.o mca.o mca_asm.o topology.o
obj-$(CONFIG_IA64_BRL_EMU) += brl_emu.o
diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c
index 78f28d825f3..c7467f863c7 100644
--- a/arch/ia64/kernel/acpi.c
+++ b/arch/ia64/kernel/acpi.c
@@ -423,6 +423,7 @@ static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
#define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
#define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
static struct acpi_table_slit __initdata *slit_table;
+cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
{
@@ -482,6 +483,7 @@ acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
(pa->apic_id << 8) | (pa->local_sapic_eid);
/* nid should be overridden as logical node id later */
node_cpuid[srat_num_cpus].nid = pxm;
+ cpu_set(srat_num_cpus, early_cpu_possible_map);
srat_num_cpus++;
}
@@ -559,7 +561,7 @@ void __init acpi_numa_arch_fixup(void)
}
/* set logical node id in cpu structure */
- for (i = 0; i < srat_num_cpus; i++)
+ for_each_possible_early_cpu(i)
node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
printk(KERN_INFO "Number of logical nodes in system = %d\n",
diff --git a/arch/ia64/kernel/asm-offsets.c b/arch/ia64/kernel/asm-offsets.c
index 0aebc6f79e9..230a6f92367 100644
--- a/arch/ia64/kernel/asm-offsets.c
+++ b/arch/ia64/kernel/asm-offsets.c
@@ -7,6 +7,7 @@
#define ASM_OFFSETS_C 1
#include <linux/sched.h>
+#include <linux/pid.h>
#include <linux/clocksource.h>
#include <asm-ia64/processor.h>
@@ -34,17 +35,29 @@ void foo(void)
DEFINE(SIGFRAME_SIZE, sizeof (struct sigframe));
DEFINE(UNW_FRAME_INFO_SIZE, sizeof (struct unw_frame_info));
+ BUILD_BUG_ON(sizeof(struct upid) != 32);
+ DEFINE(IA64_UPID_SHIFT, 5);
+
BLANK();
DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
DEFINE(TI_CPU, offsetof(struct thread_info, cpu));
DEFINE(TI_PRE_COUNT, offsetof(struct thread_info, preempt_count));
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+ DEFINE(TI_AC_STAMP, offsetof(struct thread_info, ac_stamp));
+ DEFINE(TI_AC_LEAVE, offsetof(struct thread_info, ac_leave));
+ DEFINE(TI_AC_STIME, offsetof(struct thread_info, ac_stime));
+ DEFINE(TI_AC_UTIME, offsetof(struct thread_info, ac_utime));
+#endif
BLANK();
DEFINE(IA64_TASK_BLOCKED_OFFSET,offsetof (struct task_struct, blocked));
DEFINE(IA64_TASK_CLEAR_CHILD_TID_OFFSET,offsetof (struct task_struct, clear_child_tid));
DEFINE(IA64_TASK_GROUP_LEADER_OFFSET, offsetof (struct task_struct, group_leader));
+ DEFINE(IA64_TASK_TGIDLINK_OFFSET, offsetof (struct task_struct, pids[PIDTYPE_PID].pid));
+ DEFINE(IA64_PID_LEVEL_OFFSET, offsetof (struct pid, level));
+ DEFINE(IA64_PID_UPID_OFFSET, offsetof (struct pid, numbers[0]));
DEFINE(IA64_TASK_PENDING_OFFSET,offsetof (struct task_struct, pending));
DEFINE(IA64_TASK_PID_OFFSET, offsetof (struct task_struct, pid));
DEFINE(IA64_TASK_REAL_PARENT_OFFSET, offsetof (struct task_struct, real_parent));
diff --git a/arch/ia64/kernel/crash.c b/arch/ia64/kernel/crash.c
index fbe742ad2fd..90ef338cf46 100644
--- a/arch/ia64/kernel/crash.c
+++ b/arch/ia64/kernel/crash.c
@@ -24,6 +24,7 @@ int kdump_status[NR_CPUS];
static atomic_t kdump_cpu_frozen;
atomic_t kdump_in_progress;
static int kdump_on_init = 1;
+static int kdump_on_fatal_mca = 1;
static inline Elf64_Word
*append_elf_note(Elf64_Word *buf, char *name, unsigned type, void *data,
@@ -118,6 +119,7 @@ machine_crash_shutdown(struct pt_regs *pt)
static void
machine_kdump_on_init(void)
{
+ crash_save_vmcoreinfo();
local_irq_disable();
kexec_disable_iosapic();
machine_kexec(ia64_kimage);
@@ -148,7 +150,7 @@ kdump_init_notifier(struct notifier_block *self, unsigned long val, void *data)
struct ia64_mca_notify_die *nd;
struct die_args *args = data;
- if (!kdump_on_init)
+ if (!kdump_on_init && !kdump_on_fatal_mca)
return NOTIFY_DONE;
if (!ia64_kimage) {
@@ -173,32 +175,38 @@ kdump_init_notifier(struct notifier_block *self, unsigned long val, void *data)
return NOTIFY_DONE;
switch (val) {
- case DIE_INIT_MONARCH_PROCESS:
+ case DIE_INIT_MONARCH_PROCESS:
+ if (kdump_on_init) {
atomic_set(&kdump_in_progress, 1);
*(nd->monarch_cpu) = -1;
- break;
- case DIE_INIT_MONARCH_LEAVE:
+ }
+ break;
+ case DIE_INIT_MONARCH_LEAVE:
+ if (kdump_on_init)
machine_kdump_on_init();
- break;
- case DIE_INIT_SLAVE_LEAVE:
- if (atomic_read(&kdump_in_progress))
- unw_init_running(kdump_cpu_freeze, NULL);
- break;
- case DIE_MCA_RENDZVOUS_LEAVE:
- if (atomic_read(&kdump_in_progress))
- unw_init_running(kdump_cpu_freeze, NULL);
- break;
- case DIE_MCA_MONARCH_LEAVE:
- /* die_register->signr indicate if MCA is recoverable */
- if (!args->signr)
- machine_kdump_on_init();
- break;
+ break;
+ case DIE_INIT_SLAVE_LEAVE:
+ if (atomic_read(&kdump_in_progress))
+ unw_init_running(kdump_cpu_freeze, NULL);
+ break;
+ case DIE_MCA_RENDZVOUS_LEAVE:
+ if (atomic_read(&kdump_in_progress))
+ unw_init_running(kdump_cpu_freeze, NULL);
+ break;
+ case DIE_MCA_MONARCH_LEAVE:
+ /* die_register->signr indicate if MCA is recoverable */
+ if (kdump_on_fatal_mca && !args->signr) {
+ atomic_set(&kdump_in_progress, 1);
+ *(nd->monarch_cpu) = -1;
+ machine_kdump_on_init();
+ }
+ break;
}
return NOTIFY_DONE;
}
#ifdef CONFIG_SYSCTL
-static ctl_table kdump_on_init_table[] = {
+static ctl_table kdump_ctl_table[] = {
{
.ctl_name = CTL_UNNUMBERED,
.procname = "kdump_on_init",
@@ -207,6 +215,14 @@ static ctl_table kdump_on_init_table[] = {
.mode = 0644,
.proc_handler = &proc_dointvec,
},
+ {
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "kdump_on_fatal_mca",
+ .data = &kdump_on_fatal_mca,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
{ .ctl_name = 0 }
};
@@ -215,7 +231,7 @@ static ctl_table sys_table[] = {
.ctl_name = CTL_KERN,
.procname = "kernel",
.mode = 0555,
- .child = kdump_on_init_table,
+ .child = kdump_ctl_table,
},
{ .ctl_name = 0 }
};
diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c
index 728d7247a1a..d45f215bc8f 100644
--- a/arch/ia64/kernel/efi.c
+++ b/arch/ia64/kernel/efi.c
@@ -37,6 +37,7 @@
#include <asm/pgtable.h>
#include <asm/processor.h>
#include <asm/mca.h>
+#include <asm/tlbflush.h>
#define EFI_DEBUG 0
@@ -403,6 +404,41 @@ efi_get_pal_addr (void)
return NULL;
}
+
+static u8 __init palo_checksum(u8 *buffer, u32 length)
+{
+ u8 sum = 0;
+ u8 *end = buffer + length;
+
+ while (buffer < end)
+ sum = (u8) (sum + *(buffer++));
+
+ return sum;
+}
+
+/*
+ * Parse and handle PALO table which is published at:
+ * http://www.dig64.org/home/DIG64_PALO_R1_0.pdf
+ */
+static void __init handle_palo(unsigned long palo_phys)
+{
+ struct palo_table *palo = __va(palo_phys);
+ u8 checksum;
+
+ if (strncmp(palo->signature, PALO_SIG, sizeof(PALO_SIG) - 1)) {
+ printk(KERN_INFO "PALO signature incorrect.\n");
+ return;
+ }
+
+ checksum = palo_checksum((u8 *)palo, palo->length);
+ if (checksum) {
+ printk(KERN_INFO "PALO checksum incorrect.\n");
+ return;
+ }
+
+ setup_ptcg_sem(palo->max_tlb_purges, NPTCG_FROM_PALO);
+}
+
void
efi_map_pal_code (void)
{
@@ -432,6 +468,7 @@ efi_init (void)
u64 efi_desc_size;
char *cp, vendor[100] = "unknown";
int i;
+ unsigned long palo_phys;
/*
* It's too early to be able to use the standard kernel command line
@@ -496,6 +533,8 @@ efi_init (void)
efi.hcdp = EFI_INVALID_TABLE_ADDR;
efi.uga = EFI_INVALID_TABLE_ADDR;
+ palo_phys = EFI_INVALID_TABLE_ADDR;
+
for (i = 0; i < (int) efi.systab->nr_tables; i++) {
if (efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID) == 0) {
efi.mps = config_tables[i].table;
@@ -515,10 +554,17 @@ efi_init (void)
} else if (efi_guidcmp(config_tables[i].guid, HCDP_TABLE_GUID) == 0) {
efi.hcdp = config_tables[i].table;
printk(" HCDP=0x%lx", config_tables[i].table);
+ } else if (efi_guidcmp(config_tables[i].guid,
+ PROCESSOR_ABSTRACTION_LAYER_OVERWRITE_GUID) == 0) {
+ palo_phys = config_tables[i].table;
+ printk(" PALO=0x%lx", config_tables[i].table);
}
}
printk("\n");
+ if (palo_phys != EFI_INVALID_TABLE_ADDR)
+ handle_palo(palo_phys);
+
runtime = __va(efi.systab->runtime);
efi.get_time = phys_get_time;
efi.set_time = phys_set_time;
diff --git a/arch/ia64/kernel/entry.S b/arch/ia64/kernel/entry.S
index 3c331c464b4..b0be4a28017 100644
--- a/arch/ia64/kernel/entry.S
+++ b/arch/ia64/kernel/entry.S
@@ -710,6 +710,16 @@ ENTRY(ia64_leave_syscall)
(pUStk) cmp.eq.unc p6,p0=r0,r0 // p6 <- pUStk
#endif
.work_processed_syscall:
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+ adds r2=PT(LOADRS)+16,r12
+(pUStk) mov.m r22=ar.itc // fetch time at leave
+ adds r18=TI_FLAGS+IA64_TASK_SIZE,r13
+ ;;
+(p6) ld4 r31=[r18] // load current_thread_info()->flags
+ ld8 r19=[r2],PT(B6)-PT(LOADRS) // load ar.rsc value for "loadrs"
+ adds r3=PT(AR_BSPSTORE)+16,r12 // deferred
+ ;;
+#else
adds r2=PT(LOADRS)+16,r12
adds r3=PT(AR_BSPSTORE)+16,r12
adds r18=TI_FLAGS+IA64_TASK_SIZE,r13
@@ -718,6 +728,7 @@ ENTRY(ia64_leave_syscall)
ld8 r19=[r2],PT(B6)-PT(LOADRS) // load ar.rsc value for "loadrs"
nop.i 0
;;
+#endif
mov r16=ar.bsp // M2 get existing backing store pointer
ld8 r18=[r2],PT(R9)-PT(B6) // load b6
(p6) and r15=TIF_WORK_MASK,r31 // any work other than TIF_SYSCALL_TRACE?
@@ -737,12 +748,21 @@ ENTRY(ia64_leave_syscall)
ld8 r29=[r2],16 // M0|1 load cr.ipsr
ld8 r28=[r3],16 // M0|1 load cr.iip
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+(pUStk) add r14=TI_AC_LEAVE+IA64_TASK_SIZE,r13
+ ;;
+ ld8 r30=[r2],16 // M0|1 load cr.ifs
+ ld8 r25=[r3],16 // M0|1 load ar.unat
+(pUStk) add r15=IA64_TASK_THREAD_ON_USTACK_OFFSET,r13
+ ;;
+#else
mov r22=r0 // A clear r22
;;
ld8 r30=[r2],16 // M0|1 load cr.ifs
ld8 r25=[r3],16 // M0|1 load ar.unat
(pUStk) add r14=IA64_TASK_THREAD_ON_USTACK_OFFSET,r13
;;
+#endif
ld8 r26=[r2],PT(B0)-PT(AR_PFS) // M0|1 load ar.pfs
(pKStk) mov r22=psr // M2 read PSR now that interrupts are disabled
nop 0
@@ -759,7 +779,11 @@ ENTRY(ia64_leave_syscall)
ld8.fill r1=[r3],16 // M0|1 load r1
(pUStk) mov r17=1 // A
;;
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+(pUStk) st1 [r15]=r17 // M2|3
+#else
(pUStk) st1 [r14]=r17 // M2|3
+#endif
ld8.fill r13=[r3],16 // M0|1
mov f8=f0 // F clear f8
;;
@@ -775,12 +799,22 @@ ENTRY(ia64_leave_syscall)
shr.u r18=r19,16 // I0|1 get byte size of existing "dirty" partition
cover // B add current frame into dirty partition & set cr.ifs
;;
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+ mov r19=ar.bsp // M2 get new backing store pointer
+ st8 [r14]=r22 // M save time at leave
+ mov f10=f0 // F clear f10
+
+ mov r22=r0 // A clear r22
+ movl r14=__kernel_syscall_via_epc // X
+ ;;
+#else
mov r19=ar.bsp // M2 get new backing store pointer
mov f10=f0 // F clear f10
nop.m 0
movl r14=__kernel_syscall_via_epc // X
;;
+#endif
mov.m ar.csd=r0 // M2 clear ar.csd
mov.m ar.ccv=r0 // M2 clear ar.ccv
mov b7=r14 // I0 clear b7 (hint with __kernel_syscall_via_epc)
@@ -913,10 +947,18 @@ GLOBAL_ENTRY(ia64_leave_kernel)
adds r16=PT(CR_IPSR)+16,r12
adds r17=PT(CR_IIP)+16,r12
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+ .pred.rel.mutex pUStk,pKStk
+(pKStk) mov r22=psr // M2 read PSR now that interrupts are disabled
+(pUStk) mov.m r22=ar.itc // M fetch time at leave
+ nop.i 0
+ ;;
+#else
(pKStk) mov r22=psr // M2 read PSR now that interrupts are disabled
nop.i 0
nop.i 0
;;
+#endif
ld8 r29=[r16],16 // load cr.ipsr
ld8 r28=[r17],16 // load cr.iip
;;
@@ -938,15 +980,37 @@ GLOBAL_ENTRY(ia64_leave_kernel)
;;
ld8.fill r12=[r16],16
ld8.fill r13=[r17],16
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+(pUStk) adds r3=TI_AC_LEAVE+IA64_TASK_SIZE,r18
+#else
(pUStk) adds r18=IA64_TASK_THREAD_ON_USTACK_OFFSET,r18
+#endif
;;
ld8 r20=[r16],16 // ar.fpsr
ld8.fill r15=[r17],16
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+(pUStk) adds r18=IA64_TASK_THREAD_ON_USTACK_OFFSET,r18 // deferred
+#endif
;;
ld8.fill r14=[r16],16
ld8.fill r2=[r17]
(pUStk) mov r17=1
;;
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+ // mmi_ : ld8 st1 shr;; mmi_ : st8 st1 shr;;
+ // mib : mov add br -> mib : ld8 add br
+ // bbb_ : br nop cover;; mbb_ : mov br cover;;
+ //
+ // no one require bsp in r16 if (pKStk) branch is selected.
+(pUStk) st8 [r3]=r22 // save time at leave
+(pUStk) st1 [r18]=r17 // restore current->thread.on_ustack
+ shr.u r18=r19,16 // get byte size of existing "dirty" partition
+ ;;
+ ld8.fill r3=[r16] // deferred
+ LOAD_PHYS_STACK_REG_SIZE(r17)
+(pKStk) br.cond.dpnt skip_rbs_switch
+ mov r16=ar.bsp // get existing backing store pointer
+#else
ld8.fill r3=[r16]
(pUStk) st1 [r18]=r17 // restore current->thread.on_ustack
shr.u r18=r19,16 // get byte size of existing "dirty" partition
@@ -954,6 +1018,7 @@ GLOBAL_ENTRY(ia64_leave_kernel)
mov r16=ar.bsp // get existing backing store pointer
LOAD_PHYS_STACK_REG_SIZE(r17)
(pKStk) br.cond.dpnt skip_rbs_switch
+#endif
/*
* Restore user backing store.
diff --git a/arch/ia64/kernel/fsys.S b/arch/ia64/kernel/fsys.S
index 44841971f07..c1625c7e177 100644
--- a/arch/ia64/kernel/fsys.S
+++ b/arch/ia64/kernel/fsys.S
@@ -61,13 +61,29 @@ ENTRY(fsys_getpid)
.prologue
.altrp b6
.body
+ add r17=IA64_TASK_GROUP_LEADER_OFFSET,r16
+ ;;
+ ld8 r17=[r17] // r17 = current->group_leader
add r9=TI_FLAGS+IA64_TASK_SIZE,r16
;;
ld4 r9=[r9]
- add r8=IA64_TASK_TGID_OFFSET,r16
+ add r17=IA64_TASK_TGIDLINK_OFFSET,r17
;;
and r9=TIF_ALLWORK_MASK,r9
- ld4 r8=[r8] // r8 = current->tgid
+ ld8 r17=[r17] // r17 = current->group_leader->pids[PIDTYPE_PID].pid
+ ;;
+ add r8=IA64_PID_LEVEL_OFFSET,r17
+ ;;
+ ld4 r8=[r8] // r8 = pid->level
+ add r17=IA64_PID_UPID_OFFSET,r17 // r17 = &pid->numbers[0]
+ ;;
+ shl r8=r8,IA64_UPID_SHIFT
+ ;;
+ add r17=r17,r8 // r17 = &pid->numbers[pid->level]
+ ;;
+ ld4 r8=[r17] // r8 = pid->numbers[pid->level].nr
+ ;;
+ mov r17=0
;;
cmp.ne p8,p0=0,r9
(p8) br.spnt.many fsys_fallback_syscall
@@ -126,15 +142,25 @@ ENTRY(fsys_set_tid_address)
.altrp b6
.body
add r9=TI_FLAGS+IA64_TASK_SIZE,r16
+ add r17=IA64_TASK_TGIDLINK_OFFSET,r16
;;
ld4 r9=[r9]
tnat.z p6,p7=r32 // check argument register for being NaT
+ ld8 r17=[r17] // r17 = current->pids[PIDTYPE_PID].pid
;;
and r9=TIF_ALLWORK_MASK,r9
- add r8=IA64_TASK_PID_OFFSET,r16
+ add r8=IA64_PID_LEVEL_OFFSET,r17
add r18=IA64_TASK_CLEAR_CHILD_TID_OFFSET,r16
;;
- ld4 r8=[r8]
+ ld4 r8=[r8] // r8 = pid->level
+ add r17=IA64_PID_UPID_OFFSET,r17 // r17 = &pid->numbers[0]
+ ;;
+ shl r8=r8,IA64_UPID_SHIFT
+ ;;
+ add r17=r17,r8 // r17 = &pid->numbers[pid->level]
+ ;;
+ ld4 r8=[r17] // r8 = pid->numbers[pid->level].nr
+ ;;
cmp.ne p8,p0=0,r9
mov r17=-1
;;
@@ -210,27 +236,25 @@ ENTRY(fsys_gettimeofday)
// Note that instructions are optimized for McKinley. McKinley can
// process two bundles simultaneously and therefore we continuously
// try to feed the CPU two bundles and then a stop.
- //
- // Additional note that code has changed a lot. Optimization is TBD.
- // Comments begin with "?" are maybe outdated.
- tnat.nz p6,p0 = r31 // ? branch deferred to fit later bundle
- mov pr = r30,0xc000 // Set predicates according to function
+
add r2 = TI_FLAGS+IA64_TASK_SIZE,r16
+ tnat.nz p6,p0 = r31 // guard against Nat argument
+(p6) br.cond.spnt.few .fail_einval
movl r20 = fsyscall_gtod_data // load fsyscall gettimeofday data address
;;
+ ld4 r2 = [r2] // process work pending flags
movl r29 = itc_jitter_data // itc_jitter
add r22 = IA64_GTOD_WALL_TIME_OFFSET,r20 // wall_time
- ld4 r2 = [r2] // process work pending flags
- ;;
-(p15) add r22 = IA64_GTOD_MONO_TIME_OFFSET,r20 // monotonic_time
add r21 = IA64_CLKSRC_MMIO_OFFSET,r20
- add r19 = IA64_ITC_LASTCYCLE_OFFSET,r29
+ mov pr = r30,0xc000 // Set predicates according to function
+ ;;
and r2 = TIF_ALLWORK_MASK,r2
-(p6) br.cond.spnt.few .fail_einval // ? deferred branch
+ add r19 = IA64_ITC_LASTCYCLE_OFFSET,r29
+(p15) add r22 = IA64_GTOD_MONO_TIME_OFFSET,r20 // monotonic_time
;;
- add r26 = IA64_CLKSRC_CYCLE_LAST_OFFSET,r20 // clksrc_cycle_last
+ add r26 = IA64_CLKSRC_CYCLE_LAST_OFFSET,r20 // clksrc_cycle_last
cmp.ne p6, p0 = 0, r2 // Fallback if work is scheduled
-(p6) br.cond.spnt.many fsys_fallback_syscall
+(p6) br.cond.spnt.many fsys_fallback_syscall
;;
// Begin critical section
.time_redo:
@@ -258,7 +282,6 @@ ENTRY(fsys_gettimeofday)
(p8) mov r2 = ar.itc // CPU_TIMER. 36 clocks latency!!!
(p9) ld8 r2 = [r30] // MMIO_TIMER. Could also have latency issues..
(p13) ld8 r25 = [r19] // get itc_lastcycle value
- ;; // ? could be removed by moving the last add upward
ld8 r9 = [r22],IA64_TIMESPEC_TV_NSEC_OFFSET // tv_sec
;;
ld8 r8 = [r22],-IA64_TIMESPEC_TV_NSEC_OFFSET // tv_nsec
@@ -285,13 +308,12 @@ ENTRY(fsys_gettimeofday)
EX(.fail_efault, probe.w.fault r31, 3)
xmpy.l f8 = f8,f7 // nsec_per_cyc*(counter-last_counter)
;;
- // ? simulate tbit.nz.or p7,p0 = r28,0
getf.sig r2 = f8
mf
;;
ld4 r10 = [r20] // gtod_lock.sequence
shr.u r2 = r2,r23 // shift by factor
- ;; // ? overloaded 3 bundles!
+ ;;
add r8 = r8,r2 // Add xtime.nsecs
cmp4.ne p7,p0 = r28,r10
(p7) br.cond.dpnt.few .time_redo // sequence number changed, redo
@@ -319,9 +341,9 @@ EX(.fail_efault, probe.w.fault r31, 3)
EX(.fail_efault, probe.w.fault r23, 3) // This also costs 5 cycles
(p14) xmpy.hu f8 = f8, f7 // xmpy has 5 cycles latency so use it
;;
- mov r8 = r0
(p14) getf.sig r2 = f8
;;
+ mov r8 = r0
(p14) shr.u r21 = r2, 4
;;
EX(.fail_efault, st8 [r31] = r9)
@@ -660,7 +682,11 @@ GLOBAL_ENTRY(fsys_bubble_down)
nop.i 0
;;
mov ar.rsc=0 // M2 set enforced lazy mode, pl 0, LE, loadrs=0
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+ mov.m r30=ar.itc // M get cycle for accounting
+#else
nop.m 0
+#endif
nop.i 0
;;
mov r23=ar.bspstore // M2 (12 cyc) save ar.bspstore
@@ -682,6 +708,28 @@ GLOBAL_ENTRY(fsys_bubble_down)
cmp.ne pKStk,pUStk=r0,r0 // A set pKStk <- 0, pUStk <- 1
br.call.sptk.many b7=ia64_syscall_setup // B
;;
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+ // mov.m r30=ar.itc is called in advance
+ add r16=TI_AC_STAMP+IA64_TASK_SIZE,r2
+ add r17=TI_AC_LEAVE+IA64_TASK_SIZE,r2
+ ;;
+ ld8 r18=[r16],TI_AC_STIME-TI_AC_STAMP // time at last check in kernel
+ ld8 r19=[r17],TI_AC_UTIME-TI_AC_LEAVE // time at leave kernel
+ ;;
+ ld8 r20=[r16],TI_AC_STAMP-TI_AC_STIME // cumulated stime
+ ld8 r21=[r17] // cumulated utime
+ sub r22=r19,r18 // stime before leave kernel
+ ;;
+ st8 [r16]=r30,TI_AC_STIME-TI_AC_STAMP // update stamp
+ sub r18=r30,r19 // elapsed time in user mode
+ ;;
+ add r20=r20,r22 // sum stime
+ add r21=r21,r18 // sum utime
+ ;;
+ st8 [r16]=r20 // update stime
+ st8 [r17]=r21 // update utime
+ ;;
+#endif
mov ar.rsc=0x3 // M2 set eager mode, pl 0, LE, loadrs=0
mov rp=r14 // I0 set the real return addr
and r3=_TIF_SYSCALL_TRACEAUDIT,r3 // A
diff --git a/arch/ia64/kernel/head.S b/arch/ia64/kernel/head.S
index d3a41d5f8d1..ddeab4e36fd 100644
--- a/arch/ia64/kernel/head.S
+++ b/arch/ia64/kernel/head.S
@@ -1002,6 +1002,26 @@ GLOBAL_ENTRY(sched_clock)
br.ret.sptk.many rp
END(sched_clock)
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+GLOBAL_ENTRY(cycle_to_cputime)
+ alloc r16=ar.pfs,1,0,0,0
+ addl r8=THIS_CPU(cpu_info) + IA64_CPUINFO_NSEC_PER_CYC_OFFSET,r0
+ ;;
+ ldf8 f8=[r8]
+ ;;
+ setf.sig f9=r32
+ ;;
+ xmpy.lu f10=f9,f8 // calculate low 64 bits of 128-bit product (4 cyc)
+ xmpy.hu f11=f9,f8 // calculate high 64 bits of 128-bit product
+ ;;
+ getf.sig r8=f10 // (5 cyc)
+ getf.sig r9=f11
+ ;;
+ shrp r8=r9,r8,IA64_NSEC_PER_CYC_SHIFT
+ br.ret.sptk.many rp
+END(cycle_to_cputime)
+#endif /* CONFIG_VIRT_CPU_ACCOUNTING */
+
GLOBAL_ENTRY(start_kernel_thread)
.prologue
.save rp, r0 // this is the end of the call-chain
diff --git a/arch/ia64/kernel/ia64_ksyms.c b/arch/ia64/kernel/ia64_ksyms.c
index 8e7193d5552..6da1f20d737 100644
--- a/arch/ia64/kernel/ia64_ksyms.c
+++ b/arch/ia64/kernel/ia64_ksyms.c
@@ -19,12 +19,6 @@ EXPORT_SYMBOL_GPL(empty_zero_page);
EXPORT_SYMBOL(ip_fast_csum); /* hand-coded assembly */
EXPORT_SYMBOL(csum_ipv6_magic);
-#include <asm/semaphore.h>
-EXPORT_SYMBOL(__down);
-EXPORT_SYMBOL(__down_interruptible);
-EXPORT_SYMBOL(__down_trylock);
-EXPORT_SYMBOL(__up);
-
#include <asm/page.h>
EXPORT_SYMBOL(clear_page);
diff --git a/arch/ia64/kernel/irq_ia64.c b/arch/ia64/kernel/irq_ia64.c
index d8be23fbe6b..5538471e8d6 100644
--- a/arch/ia64/kernel/irq_ia64.c
+++ b/arch/ia64/kernel/irq_ia64.c
@@ -472,7 +472,7 @@ ia64_handle_irq (ia64_vector vector, struct pt_regs *regs)
static unsigned char count;
static long last_time;
- if (jiffies - last_time > 5*HZ)
+ if (time_after(jiffies, last_time + 5 * HZ))
count = 0;
if (++count < 5) {
last_time = jiffies;
diff --git a/arch/ia64/kernel/ivt.S b/arch/ia64/kernel/ivt.S
index 34f44d8be00..6678c49daba 100644
--- a/arch/ia64/kernel/ivt.S
+++ b/arch/ia64/kernel/ivt.S
@@ -805,8 +805,13 @@ ENTRY(break_fault)
(p8) adds r28=16,r28 // A switch cr.iip to next bundle
(p9) adds r8=1,r8 // A increment ei to next slot
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+ ;;
+ mov b6=r30 // I0 setup syscall handler branch reg early
+#else
nop.i 0
;;
+#endif
mov.m r25=ar.unat // M2 (5 cyc)
dep r29=r8,r29,41,2 // I0 insert new ei into cr.ipsr
@@ -817,7 +822,11 @@ ENTRY(break_fault)
//
///////////////////////////////////////////////////////////////////////
st1 [r16]=r0 // M2|3 clear current->thread.on_ustack flag
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+ mov.m r30=ar.itc // M get cycle for accounting
+#else
mov b6=r30 // I0 setup syscall handler branch reg early
+#endif
cmp.eq pKStk,pUStk=r0,r17 // A were we on kernel stacks already?
and r9=_TIF_SYSCALL_TRACEAUDIT,r9 // A mask trace or audit
@@ -829,6 +838,30 @@ ENTRY(break_fault)
cmp.eq p14,p0=r9,r0 // A are syscalls being traced/audited?
br.call.sptk.many b7=ia64_syscall_setup // B
1:
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+ // mov.m r30=ar.itc is called in advance, and r13 is current
+ add r16=TI_AC_STAMP+IA64_TASK_SIZE,r13 // A
+ add r17=TI_AC_LEAVE+IA64_TASK_SIZE,r13 // A
+(pKStk) br.cond.spnt .skip_accounting // B unlikely skip
+ ;;
+ ld8 r18=[r16],TI_AC_STIME-TI_AC_STAMP // M get last stamp
+ ld8 r19=[r17],TI_AC_UTIME-TI_AC_LEAVE // M time at leave
+ ;;
+ ld8 r20=[r16],TI_AC_STAMP-TI_AC_STIME // M cumulated stime
+ ld8 r21=[r17] // M cumulated utime
+ sub r22=r19,r18 // A stime before leave
+ ;;
+ st8 [r16]=r30,TI_AC_STIME-TI_AC_STAMP // M update stamp
+ sub r18=r30,r19 // A elapsed time in user
+ ;;
+ add r20=r20,r22 // A sum stime
+ add r21=r21,r18 // A sum utime
+ ;;
+ st8 [r16]=r20 // M update stime
+ st8 [r17]=r21 // M update utime
+ ;;
+.skip_accounting:
+#endif
mov ar.rsc=0x3 // M2 set eager mode, pl 0, LE, loadrs=0
nop 0
bsw.1 // B (6 cyc) regs are saved, switch to bank 1
@@ -928,6 +961,7 @@ END(interrupt)
* - r27: saved ar.rsc
* - r28: saved cr.iip
* - r29: saved cr.ipsr
+ * - r30: ar.itc for accounting (don't touch)
* - r31: saved pr
* - b0: original contents (to be saved)
* On exit:
@@ -1090,6 +1124,41 @@ END(dispatch_illegal_op_fault)
DBG_FAULT(16)
FAULT(16)
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+ /*
+ * There is no particular reason for this code to be here, other than
+ * that there happens to be space here that would go unused otherwise.
+ * If this fault ever gets "unreserved", simply moved the following
+ * code to a more suitable spot...
+ *
+ * account_sys_enter is called from SAVE_MIN* macros if accounting is
+ * enabled and if the macro is entered from user mode.
+ */
+ENTRY(account_sys_enter)
+ // mov.m r20=ar.itc is called in advance, and r13 is current
+ add r16=TI_AC_STAMP+IA64_TASK_SIZE,r13
+ add r17=TI_AC_LEAVE+IA64_TASK_SIZE,r13
+ ;;
+ ld8 r18=[r16],TI_AC_STIME-TI_AC_STAMP // time at last check in kernel
+ ld8 r19=[r17],TI_AC_UTIME-TI_AC_LEAVE // time at left from kernel
+ ;;
+ ld8 r23=[r16],TI_AC_STAMP-TI_AC_STIME // cumulated stime
+ ld8 r21=[r17] // cumulated utime
+ sub r22=r19,r18 // stime before leave kernel
+ ;;
+ st8 [r16]=r20,TI_AC_STIME-TI_AC_STAMP // update stamp
+ sub r18=r20,r19 // elapsed time in user mode
+ ;;
+ add r23=r23,r22 // sum stime
+ add r21=r21,r18 // sum utime
+ ;;
+ st8 [r16]=r23 // update stime
+ st8 [r17]=r21 // update utime
+ ;;
+ br.ret.sptk.many rp
+END(account_sys_enter)
+#endif
+
.org ia64_ivt+0x4400
/////////////////////////////////////////////////////////////////////////////////////////
// 0x4400 Entry 17 (size 64 bundles) Reserved
diff --git a/arch/ia64/kernel/kprobes.c b/arch/ia64/kernel/kprobes.c
index 8d9a446a0d1..233434f4f88 100644
--- a/arch/ia64/kernel/kprobes.c
+++ b/arch/ia64/kernel/kprobes.c
@@ -78,6 +78,20 @@ static enum instruction_type bundle_encoding[32][3] = {
{ u, u, u }, /* 1F */
};
+/* Insert a long branch code */
+static void __kprobes set_brl_inst(void *from, void *to)
+{
+ s64 rel = ((s64) to - (s64) from) >> 4;
+ bundle_t *brl;
+ brl = (bundle_t *) ((u64) from & ~0xf);
+ brl->quad0.template = 0x05; /* [MLX](stop) */
+ brl->quad0.slot0 = NOP_M_INST; /* nop.m 0x0 */
+ brl->quad0.slot1_p0 = ((rel >> 20) & 0x7fffffffff) << 2;
+ brl->quad1.slot1_p1 = (((rel >> 20) & 0x7fffffffff) << 2) >> (64 - 46);
+ /* brl.cond.sptk.many.clr rel<<4 (qp=0) */
+ brl->quad1.slot2 = BRL_INST(rel >> 59, rel & 0xfffff);
+}
+
/*
* In this function we check to see if the instruction
* is IP relative instruction and update the kprobe
@@ -496,6 +510,77 @@ void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
regs->b0 = ((struct fnptr *)kretprobe_trampoline)->ip;
}
+/* Check the instruction in the slot is break */
+static int __kprobes __is_ia64_break_inst(bundle_t *bundle, uint slot)
+{
+ unsigned int major_opcode;
+ unsigned int template = bundle->quad0.template;
+ unsigned long kprobe_inst;
+
+ /* Move to slot 2, if bundle is MLX type and kprobe slot is 1 */
+ if (slot == 1 && bundle_encoding[template][1] == L)
+ slot++;
+
+ /* Get Kprobe probe instruction at given slot*/
+ get_kprobe_inst(bundle, slot, &kprobe_inst, &major_opcode);
+
+ /* For break instruction,
+ * Bits 37:40 Major opcode to be zero
+ * Bits 27:32 X6 to be zero
+ * Bits 32:35 X3 to be zero
+ */
+ if (major_opcode || ((kprobe_inst >> 27) & 0x1FF)) {
+ /* Not a break instruction */
+ return 0;
+ }
+
+ /* Is a break instruction */
+ return 1;
+}
+
+/*
+ * In this function, we check whether the target bundle modifies IP or
+ * it triggers an exception. If so, it cannot be boostable.
+ */
+static int __kprobes can_boost(bundle_t *bundle, uint slot,
+ unsigned long bundle_addr)
+{
+ unsigned int template = bundle->quad0.template;
+
+ do {
+ if (search_exception_tables(bundle_addr + slot) ||
+ __is_ia64_break_inst(bundle, slot))
+ return 0; /* exception may occur in this bundle*/
+ } while ((++slot) < 3);
+ template &= 0x1e;
+ if (template >= 0x10 /* including B unit */ ||
+ template == 0x04 /* including X unit */ ||
+ template == 0x06) /* undefined */
+ return 0;
+
+ return 1;
+}
+
+/* Prepare long jump bundle and disables other boosters if need */
+static void __kprobes prepare_booster(struct kprobe *p)
+{
+ unsigned long addr = (unsigned long)p->addr & ~0xFULL;
+ unsigned int slot = (unsigned long)p->addr & 0xf;
+ struct kprobe *other_kp;
+
+ if (can_boost(&p->ainsn.insn[0].bundle, slot, addr)) {
+ set_brl_inst(&p->ainsn.insn[1].bundle, (bundle_t *)addr + 1);
+ p->ainsn.inst_flag |= INST_FLAG_BOOSTABLE;
+ }
+
+ /* disables boosters in previous slots */
+ for (; addr < (unsigned long)p->addr; addr++) {
+ other_kp = get_kprobe((void *)addr);
+ if (other_kp)
+ other_kp->ainsn.inst_flag &= ~INST_FLAG_BOOSTABLE;
+ }
+}
+
int __kprobes arch_prepare_kprobe(struct kprobe *p)
{
unsigned long addr = (unsigned long) p->addr;
@@ -530,6 +615,8 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
prepare_break_inst(template, slot, major_opcode, kprobe_inst, p, qp);
+ prepare_booster(p);
+
return 0;
}
@@ -543,7 +630,9 @@ void __kprobes arch_arm_kprobe(struct kprobe *p)
src = &p->opcode.bundle;
flush_icache_range((unsigned long)p->ainsn.insn,
- (unsigned long)p->ainsn.insn + sizeof(kprobe_opcode_t));
+ (unsigned long)p->ainsn.insn +
+ sizeof(kprobe_opcode_t) * MAX_INSN_SIZE);
+
switch (p->ainsn.slot) {
case 0:
dest->quad0.slot0 = src->quad0.slot0;
@@ -584,13 +673,13 @@ void __kprobes arch_disarm_kprobe(struct kprobe *p)
void __kprobes arch_remove_kprobe(struct kprobe *p)
{
mutex_lock(&kprobe_mutex);
- free_insn_slot(p->ainsn.insn, 0);
+ free_insn_slot(p->ainsn.insn, p->ainsn.inst_flag & INST_FLAG_BOOSTABLE);
mutex_unlock(&kprobe_mutex);
}
/*
* We are resuming execution after a single step fault, so the pt_regs
* structure reflects the register state after we executed the instruction
- * located in the kprobe (p->ainsn.insn.bundle). We still need to adjust
+ * located in the kprobe (p->ainsn.insn->bundle). We still need to adjust
* the ip to point back to the original stack address. To set the IP address
* to original stack address, handle the case where we need to fixup the
* relative IP address and/or fixup branch register.
@@ -607,7 +696,7 @@ static void __kprobes resume_execution(struct kprobe *p, struct pt_regs *regs)
if (slot == 1 && bundle_encoding[template][1] == L)
slot = 2;
- if (p->ainsn.inst_flag) {
+ if (p->ainsn.inst_flag & ~INST_FLAG_BOOSTABLE) {
if (p->ainsn.inst_flag & INST_FLAG_FIX_RELATIVE_IP_ADDR) {
/* Fix relative IP address */
@@ -686,33 +775,12 @@ static void __kprobes prepare_ss(struct kprobe *p, struct pt_regs *regs)
static int __kprobes is_ia64_break_inst(struct pt_regs *regs)
{
unsigned int slot = ia64_psr(regs)->ri;
- unsigned int template, major_opcode;
- unsigned long kprobe_inst;
unsigned long *kprobe_addr = (unsigned long *)regs->cr_iip;
bundle_t bundle;
memcpy(&bundle, kprobe_addr, sizeof(bundle_t));
- template = bundle.quad0.template;
-
- /* Move to slot 2, if bundle is MLX type and kprobe slot is 1 */
- if (slot == 1 && bundle_encoding[template][1] == L)
- slot++;
- /* Get Kprobe probe instruction at given slot*/
- get_kprobe_inst(&bundle, slot, &kprobe_inst, &major_opcode);
-
- /* For break instruction,
- * Bits 37:40 Major opcode to be zero
- * Bits 27:32 X6 to be zero
- * Bits 32:35 X3 to be zero
- */
- if (major_opcode || ((kprobe_inst >> 27) & 0x1FF) ) {
- /* Not a break instruction */
- return 0;
- }
-
- /* Is a break instruction */
- return 1;
+ return __is_ia64_break_inst(&bundle, slot);
}
static int __kprobes pre_kprobes_handler(struct die_args *args)
@@ -802,6 +870,19 @@ static int __kprobes pre_kprobes_handler(struct die_args *args)
return 1;
ss_probe:
+#if !defined(CONFIG_PREEMPT) || defined(CONFIG_PM)
+ if (p->ainsn.inst_flag == INST_FLAG_BOOSTABLE && !p->post_handler) {
+ /* Boost up -- we can execute copied instructions directly */
+ ia64_psr(regs)->ri = p->ainsn.slot;
+ regs->cr_iip = (unsigned long)&p->ainsn.insn->bundle & ~0xFULL;
+ /* turn single stepping off */
+ ia64_psr(regs)->ss = 0;
+
+ reset_current_kprobe();
+ preempt_enable_no_resched();
+ return 1;
+ }
+#endif
prepare_ss(p, regs);
kcb->kprobe_status = KPROBE_HIT_SS;
return 1;
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index 6c18221dba3..e51bced3b0f 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -69,6 +69,7 @@
* 2007-04-27 Russ Anderson <rja@sgi.com>
* Support multiple cpus going through OS_MCA in the same event.
*/
+#include <linux/jiffies.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/sched.h>
@@ -97,6 +98,7 @@
#include <asm/irq.h>
#include <asm/hw_irq.h>
+#include <asm/tlb.h>
#include "mca_drv.h"
#include "entry.h"
@@ -112,6 +114,7 @@ DEFINE_PER_CPU(u64, ia64_mca_data); /* == __per_cpu_mca[smp_processor_id()] */
DEFINE_PER_CPU(u64, ia64_mca_per_cpu_pte); /* PTE to map per-CPU area */
DEFINE_PER_CPU(u64, ia64_mca_pal_pte); /* PTE to map PAL code */
DEFINE_PER_CPU(u64, ia64_mca_pal_base); /* vaddr PAL code granule */
+DEFINE_PER_CPU(u64, ia64_mca_tr_reload); /* Flag for TR reload */
unsigned long __per_cpu_mca[NR_CPUS];
@@ -293,7 +296,8 @@ static void ia64_mlogbuf_dump_from_init(void)
if (mlogbuf_finished)
return;
- if (mlogbuf_timestamp && (mlogbuf_timestamp + 30*HZ > jiffies)) {
+ if (mlogbuf_timestamp &&
+ time_before(jiffies, mlogbuf_timestamp + 30 * HZ)) {
printk(KERN_ERR "INIT: mlogbuf_dump is interrupted by INIT "
" and the system seems to be messed up.\n");
ia64_mlogbuf_finish(0);
@@ -1182,6 +1186,49 @@ all_in:
return;
}
+/* mca_insert_tr
+ *
+ * Switch rid when TR reload and needed!
+ * iord: 1: itr, 2: itr;
+ *
+*/
+static void mca_insert_tr(u64 iord)
+{
+
+ int i;
+ u64 old_rr;
+ struct ia64_tr_entry *p;
+ unsigned long psr;
+ int cpu = smp_processor_id();
+
+ psr = ia64_clear_ic();
+ for (i = IA64_TR_ALLOC_BASE; i < IA64_TR_ALLOC_MAX; i++) {
+ p = &__per_cpu_idtrs[cpu][iord-1][i];
+ if (p->pte & 0x1) {
+ old_rr = ia64_get_rr(p->ifa);
+ if (old_rr != p->rr) {
+ ia64_set_rr(p->ifa, p->rr);
+ ia64_srlz_d();
+ }
+ ia64_ptr(iord, p->ifa, p->itir >> 2);
+ ia64_srlz_i();
+ if (iord & 0x1) {
+ ia64_itr(0x1, i, p->ifa, p->pte, p->itir >> 2);
+ ia64_srlz_i();
+ }
+ if (iord & 0x2) {
+ ia64_itr(0x2, i, p->ifa, p->pte, p->itir >> 2);
+ ia64_srlz_i();
+ }
+ if (old_rr != p->rr) {
+ ia64_set_rr(p->ifa, old_rr);
+ ia64_srlz_d();
+ }
+ }
+ }
+ ia64_set_psr(psr);
+}
+
/*
* ia64_mca_handler
*
@@ -1266,16 +1313,17 @@ ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw,
} else {
/* Dump buffered message to console */
ia64_mlogbuf_finish(1);
-#ifdef CONFIG_KEXEC
- atomic_set(&kdump_in_progress, 1);
- monarch_cpu = -1;
-#endif
}
+
+ if (__get_cpu_var(ia64_mca_tr_reload)) {
+ mca_insert_tr(0x1); /*Reload dynamic itrs*/
+ mca_insert_tr(0x2); /*Reload dynamic itrs*/
+ }
+
if (notify_die(DIE_MCA_MONARCH_LEAVE, "MCA", regs, (long)&nd, 0, recover)
== NOTIFY_STOP)
ia64_mca_spin(__func__);
-
if (atomic_dec_return(&mca_count) > 0) {
int i;
diff --git a/arch/ia64/kernel/mca_asm.S b/arch/ia64/kernel/mca_asm.S
index 8bc7d259e0c..a06d46548ff 100644
--- a/arch/ia64/kernel/mca_asm.S
+++ b/arch/ia64/kernel/mca_asm.S
@@ -219,8 +219,13 @@ ia64_reload_tr:
mov r20=IA64_TR_CURRENT_STACK
;;
itr.d dtr[r20]=r16
+ GET_THIS_PADDR(r2, ia64_mca_tr_reload)
+ mov r18 = 1
;;
srlz.d
+ ;;
+ st8 [r2] =r18
+ ;;
done_tlb_purge_and_reload:
diff --git a/arch/ia64/kernel/minstate.h b/arch/ia64/kernel/minstate.h
index c9ac8bada78..7c548ac52bb 100644
--- a/arch/ia64/kernel/minstate.h
+++ b/arch/ia64/kernel/minstate.h
@@ -3,6 +3,18 @@
#include "entry.h"
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+/* read ar.itc in advance, and use it before leaving bank 0 */
+#define ACCOUNT_GET_STAMP \
+(pUStk) mov.m r20=ar.itc;
+#define ACCOUNT_SYS_ENTER \
+(pUStk) br.call.spnt rp=account_sys_enter \
+ ;;
+#else
+#define ACCOUNT_GET_STAMP
+#define ACCOUNT_SYS_ENTER
+#endif
+
/*
* DO_SAVE_MIN switches to the kernel stacks (if necessary) and saves
* the minimum state necessary that allows us to turn psr.ic back
@@ -122,11 +134,13 @@
;; \
.mem.offset 0,0; st8.spill [r16]=r2,16; \
.mem.offset 8,0; st8.spill [r17]=r3,16; \
+ ACCOUNT_GET_STAMP \
adds r2=IA64_PT_REGS_R16_OFFSET,r1; \
;; \
EXTRA; \
movl r1=__gp; /* establish kernel global pointer */ \
;; \
+ ACCOUNT_SYS_ENTER \
bsw.1; /* switch back to bank 1 (must be last in insn group) */ \
;;
diff --git a/arch/ia64/kernel/numa.c b/arch/ia64/kernel/numa.c
index a78b45f5fe2..c93420c9740 100644
--- a/arch/ia64/kernel/numa.c
+++ b/arch/ia64/kernel/numa.c
@@ -73,7 +73,7 @@ void __init build_cpu_to_node_map(void)
for(node=0; node < MAX_NUMNODES; node++)
cpus_clear(node_to_cpu_mask[node]);
- for(cpu = 0; cpu < NR_CPUS; ++cpu) {
+ for_each_possible_early_cpu(cpu) {
node = -1;
for (i = 0; i < NR_CPUS; ++i)
if (cpu_physical_id(cpu) == node_cpuid[i].phys_id) {
diff --git a/arch/ia64/kernel/patch.c b/arch/ia64/kernel/patch.c
index 2cb9425e042..e0dca8743db 100644
--- a/arch/ia64/kernel/patch.c
+++ b/arch/ia64/kernel/patch.c
@@ -135,10 +135,10 @@ ia64_patch_mckinley_e9 (unsigned long start, unsigned long end)
while (offp < (s32 *) end) {
wp = (u64 *) ia64_imva((char *) offp + *offp);
- wp[0] = 0x0000000100000000UL; /* nop.m 0; nop.i 0; nop.i 0 */
- wp[1] = 0x0004000000000200UL;
- wp[2] = 0x0000000100000011UL; /* nop.m 0; nop.i 0; br.ret.sptk.many b6 */
- wp[3] = 0x0084006880000200UL;
+ wp[0] = 0x0000000100000011UL; /* nop.m 0; nop.i 0; br.ret.sptk.many b6 */
+ wp[1] = 0x0084006880000200UL;
+ wp[2] = 0x0000000100000000UL; /* nop.m 0; nop.i 0; nop.i 0 */
+ wp[3] = 0x0004000000000200UL;
ia64_fc(wp); ia64_fc(wp + 2);
++offp;
}
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index a2aabfdc80d..d1d24f4598d 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -4204,10 +4204,10 @@ pfm_check_task_exist(pfm_context_t *ctx)
do_each_thread (g, t) {
if (t->thread.pfm_context == ctx) {
ret = 0;
- break;
+ goto out;
}
} while_each_thread (g, t);
-
+out:
read_unlock(&tasklist_lock);
DPRINT(("pfm_check_task_exist: ret=%d ctx=%p\n", ret, ctx));
diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index 49937a383b2..a5ea817cbcb 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -625,21 +625,6 @@ do_dump_fpu (struct unw_frame_info *info, void *arg)
do_dump_task_fpu(current, info, arg);
}
-int
-dump_task_regs(struct task_struct *task, elf_gregset_t *regs)
-{
- struct unw_frame_info tcore_info;
-
- if (current == task) {
- unw_init_running(do_copy_regs, regs);
- } else {
- memset(&tcore_info, 0, sizeof(tcore_info));
- unw_init_from_blocked_task(&tcore_info, task);
- do_copy_task_regs(task, &tcore_info, regs);
- }
- return 1;
-}
-
void
ia64_elf_core_copy_regs (struct pt_regs *pt, elf_gregset_t dst)
{
@@ -647,21 +632,6 @@ ia64_elf_core_copy_regs (struct pt_regs *pt, elf_gregset_t dst)
}
int
-dump_task_fpu (struct task_struct *task, elf_fpregset_t *dst)
-{
- struct unw_frame_info tcore_info;
-
- if (current == task) {
- unw_init_running(do_dump_fpu, dst);
- } else {
- memset(&tcore_info, 0, sizeof(tcore_info));
- unw_init_from_blocked_task(&tcore_info, task);
- do_dump_task_fpu(task, &tcore_info, dst);
- }
- return 1;
-}
-
-int
dump_fpu (struct pt_regs *pt, elf_fpregset_t dst)
{
unw_init_running(do_dump_fpu, dst);
diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c
index ab784ec4319..2a9943b5947 100644
--- a/arch/ia64/kernel/ptrace.c
+++ b/arch/ia64/kernel/ptrace.c
@@ -3,6 +3,9 @@
*
* Copyright (C) 1999-2005 Hewlett-Packard Co
* David Mosberger-Tang <davidm@hpl.hp.com>
+ * Copyright (C) 2006 Intel Co
+ * 2006-08-12 - IA64 Native Utrace implementation support added by
+ * Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
*
* Derived from the x86 and Alpha versions.
*/
@@ -17,6 +20,8 @@
#include <linux/security.h>
#include <linux/audit.h>
#include <linux/signal.h>
+#include <linux/regset.h>
+#include <linux/elf.h>
#include <asm/pgtable.h>
#include <asm/processor.h>
@@ -740,25 +745,6 @@ ia64_sync_fph (struct task_struct *task)
psr->dfh = 1;
}
-static int
-access_fr (struct unw_frame_info *info, int regnum, int hi,
- unsigned long *data, int write_access)
-{
- struct ia64_fpreg fpval;
- int ret;
-
- ret = unw_get_fr(info, regnum, &fpval);
- if (ret < 0)
- return ret;
-
- if (write_access) {
- fpval.u.bits[hi] = *data;
- ret = unw_set_fr(info, regnum, fpval);
- } else
- *data = fpval.u.bits[hi];
- return ret;
-}
-
/*
* Change the machine-state of CHILD such that it will return via the normal
* kernel exit-path, rather than the syscall-exit path.
@@ -860,309 +846,7 @@ access_nat_bits (struct task_struct *child, struct pt_regs *pt,
static int
access_uarea (struct task_struct *child, unsigned long addr,
- unsigned long *data, int write_access)
-{
- unsigned long *ptr, regnum, urbs_end, cfm;
- struct switch_stack *sw;
- struct pt_regs *pt;
-# define pt_reg_addr(pt, reg) ((void *) \
- ((unsigned long) (pt) \
- + offsetof(struct pt_regs, reg)))
-
-
- pt = task_pt_regs(child);
- sw = (struct switch_stack *) (child->thread.ksp + 16);
-
- if ((addr & 0x7) != 0) {
- dprintk("ptrace: unaligned register address 0x%lx\n", addr);
- return -1;
- }
-
- if (addr < PT_F127 + 16) {
- /* accessing fph */
- if (write_access)
- ia64_sync_fph(child);
- else
- ia64_flush_fph(child);
- ptr = (unsigned long *)
- ((unsigned long) &child->thread.fph + addr);
- } else if ((addr >= PT_F10) && (addr < PT_F11 + 16)) {
- /* scratch registers untouched by kernel (saved in pt_regs) */
- ptr = pt_reg_addr(pt, f10) + (addr - PT_F10);
- } else if (addr >= PT_F12 && addr < PT_F15 + 16) {
- /*
- * Scratch registers untouched by kernel (saved in
- * switch_stack).
- */
- ptr = (unsigned long *) ((long) sw
- + (addr - PT_NAT_BITS - 32));
- } else if (addr < PT_AR_LC + 8) {
- /* preserved state: */
- struct unw_frame_info info;
- char nat = 0;
- int ret;
-
- unw_init_from_blocked_task(&info, child);
- if (unw_unwind_to_user(&info) < 0)
- return -1;
-
- switch (addr) {
- case PT_NAT_BITS:
- return access_nat_bits(child, pt, &info,
- data, write_access);
-
- case PT_R4: case PT_R5: case PT_R6: case PT_R7:
- if (write_access) {
- /* read NaT bit first: */
- unsigned long dummy;
-
- ret = unw_get_gr(&info, (addr - PT_R4)/8 + 4,
- &dummy, &nat);
- if (ret < 0)
- return ret;
- }
- return unw_access_gr(&info, (addr - PT_R4)/8 + 4, data,
- &nat, write_access);
-
- case PT_B1: case PT_B2: case PT_B3:
- case PT_B4: case PT_B5:
- return unw_access_br(&info, (addr - PT_B1)/8 + 1, data,
- write_access);
-
- case PT_AR_EC:
- return unw_access_ar(&info, UNW_AR_EC, data,
- write_access);
-
- case PT_AR_LC:
- return unw_access_ar(&info, UNW_AR_LC, data,
- write_access);
-
- default:
- if (addr >= PT_F2 && addr < PT_F5 + 16)
- return access_fr(&info, (addr - PT_F2)/16 + 2,
- (addr & 8) != 0, data,
- write_access);
- else if (addr >= PT_F16 && addr < PT_F31 + 16)
- return access_fr(&info,
- (addr - PT_F16)/16 + 16,
- (addr & 8) != 0,
- data, write_access);
- else {
- dprintk("ptrace: rejecting access to register "
- "address 0x%lx\n", addr);
- return -1;
- }
- }
- } else if (addr < PT_F9+16) {
- /* scratch state */
- switch (addr) {
- case PT_AR_BSP:
- /*
- * By convention, we use PT_AR_BSP to refer to
- * the end of the user-level backing store.
- * Use ia64_rse_skip_regs(PT_AR_BSP, -CFM.sof)
- * to get the real value of ar.bsp at the time
- * the kernel was entered.
- *
- * Furthermore, when changing the contents of
- * PT_AR_BSP (or PT_CFM) while the task is
- * blocked in a system call, convert the state
- * so that the non-system-call exit
- * path is used. This ensures that the proper
- * state will be picked up when resuming
- * execution. However, it *also* means that
- * once we write PT_AR_BSP/PT_CFM, it won't be
- * possible to modify the syscall arguments of
- * the pending system call any longer. This
- * shouldn't be an issue because modifying
- * PT_AR_BSP/PT_CFM generally implies that
- * we're either abandoning the pending system
- * call or that we defer it's re-execution
- * (e.g., due to GDB doing an inferior
- * function call).
- */
- urbs_end = ia64_get_user_rbs_end(child, pt, &cfm);
- if (write_access) {
- if (*data != urbs_end) {
- if (in_syscall(pt))
- convert_to_non_syscall(child,
- pt,
- cfm);
- /*
- * Simulate user-level write
- * of ar.bsp:
- */
- pt->loadrs = 0;
- pt->ar_bspstore = *data;
- }
- } else
- *data = urbs_end;
- return 0;
-
- case PT_CFM:
- urbs_end = ia64_get_user_rbs_end(child, pt, &cfm);
- if (write_access) {
- if (((cfm ^ *data) & PFM_MASK) != 0) {
- if (in_syscall(pt))
- convert_to_non_syscall(child,
- pt,
- cfm);
- pt->cr_ifs = ((pt->cr_ifs & ~PFM_MASK)
- | (*data & PFM_MASK));
- }
- } else
- *data = cfm;
- return 0;
-
- case PT_CR_IPSR:
- if (write_access) {
- unsigned long tmp = *data;
- /* psr.ri==3 is a reserved value: SDM 2:25 */
- if ((tmp & IA64_PSR_RI) == IA64_PSR_RI)
- tmp &= ~IA64_PSR_RI;
- pt->cr_ipsr = ((tmp & IPSR_MASK)
- | (pt->cr_ipsr & ~IPSR_MASK));
- } else
- *data = (pt->cr_ipsr & IPSR_MASK);
- return 0;
-
- case PT_AR_RSC:
- if (write_access)
- pt->ar_rsc = *data | (3 << 2); /* force PL3 */
- else
- *data = pt->ar_rsc;
- return 0;
-
- case PT_AR_RNAT:
- ptr = pt_reg_addr(pt, ar_rnat);
- break;
- case PT_R1:
- ptr = pt_reg_addr(pt, r1);
- break;
- case PT_R2: case PT_R3:
- ptr = pt_reg_addr(pt, r2) + (addr - PT_R2);
- break;
- case PT_R8: case PT_R9: case PT_R10: case PT_R11:
- ptr = pt_reg_addr(pt, r8) + (addr - PT_R8);
- break;
- case PT_R12: case PT_R13:
- ptr = pt_reg_addr(pt, r12) + (addr - PT_R12);
- break;
- case PT_R14:
- ptr = pt_reg_addr(pt, r14);
- break;
- case PT_R15:
- ptr = pt_reg_addr(pt, r15);
- break;
- case PT_R16: case PT_R17: case PT_R18: case PT_R19:
- case PT_R20: case PT_R21: case PT_R22: case PT_R23:
- case PT_R24: case PT_R25: case PT_R26: case PT_R27:
- case PT_R28: case PT_R29: case PT_R30: case PT_R31:
- ptr = pt_reg_addr(pt, r16) + (addr - PT_R16);
- break;
- case PT_B0:
- ptr = pt_reg_addr(pt, b0);
- break;
- case PT_B6:
- ptr = pt_reg_addr(pt, b6);
- break;
- case PT_B7:
- ptr = pt_reg_addr(pt, b7);
- break;
- case PT_F6: case PT_F6+8: case PT_F7: case PT_F7+8:
- case PT_F8: case PT_F8+8: case PT_F9: case PT_F9+8:
- ptr = pt_reg_addr(pt, f6) + (addr - PT_F6);
- break;
- case PT_AR_BSPSTORE:
- ptr = pt_reg_addr(pt, ar_bspstore);
- break;
- case PT_AR_UNAT:
- ptr = pt_reg_addr(pt, ar_unat);
- break;
- case PT_AR_PFS:
- ptr = pt_reg_addr(pt, ar_pfs);
- break;
- case PT_AR_CCV:
- ptr = pt_reg_addr(pt, ar_ccv);
- break;
- case PT_AR_FPSR:
- ptr = pt_reg_addr(pt, ar_fpsr);
- break;
- case PT_CR_IIP:
- ptr = pt_reg_addr(pt, cr_iip);
- break;
- case PT_PR:
- ptr = pt_reg_addr(pt, pr);
- break;
- /* scratch register */
-
- default:
- /* disallow accessing anything else... */
- dprintk("ptrace: rejecting access to register "
- "address 0x%lx\n", addr);
- return -1;
- }
- } else if (addr <= PT_AR_SSD) {
- ptr = pt_reg_addr(pt, ar_csd) + (addr - PT_AR_CSD);
- } else {
- /* access debug registers */
-
- if (addr >= PT_IBR) {
- regnum = (addr - PT_IBR) >> 3;
- ptr = &child->thread.ibr[0];
- } else {
- regnum = (addr - PT_DBR) >> 3;
- ptr = &child->thread.dbr[0];
- }
-
- if (regnum >= 8) {
- dprintk("ptrace: rejecting access to register "
- "address 0x%lx\n", addr);
- return -1;
- }
-#ifdef CONFIG_PERFMON
- /*
- * Check if debug registers are used by perfmon. This
- * test must be done once we know that we can do the
- * operation, i.e. the arguments are all valid, but
- * before we start modifying the state.
- *
- * Perfmon needs to keep a count of how many processes
- * are trying to modify the debug registers for system
- * wide monitoring sessions.
- *
- * We also include read access here, because they may
- * cause the PMU-installed debug register state
- * (dbr[], ibr[]) to be reset. The two arrays are also
- * used by perfmon, but we do not use
- * IA64_THREAD_DBG_VALID. The registers are restored
- * by the PMU context switch code.
- */
- if (pfm_use_debug_registers(child)) return -1;
-#endif
-
- if (!(child->thread.flags & IA64_THREAD_DBG_VALID)) {
- child->thread.flags |= IA64_THREAD_DBG_VALID;
- memset(child->thread.dbr, 0,
- sizeof(child->thread.dbr));
- memset(child->thread.ibr, 0,
- sizeof(child->thread.ibr));
- }
-
- ptr += regnum;
-
- if ((regnum & 1) && write_access) {
- /* don't let the user set kernel-level breakpoints: */
- *ptr = *data & ~(7UL << 56);
- return 0;
- }
- }
- if (write_access)
- *ptr = *data;
- else
- *data = *ptr;
- return 0;
-}
+ unsigned long *data, int write_access);
static long
ptrace_getregs (struct task_struct *child, struct pt_all_user_regs __user *ppr)
@@ -1626,3 +1310,892 @@ syscall_trace_leave (long arg0, long arg1, long arg2, long arg3,
if (test_thread_flag(TIF_RESTORE_RSE))
ia64_sync_krbs();
}
+
+/* Utrace implementation starts here */
+struct regset_get {
+ void *kbuf;
+ void __user *ubuf;
+};
+
+struct regset_set {
+ const void *kbuf;
+ const void __user *ubuf;
+};
+
+struct regset_getset {
+ struct task_struct *target;
+ const struct user_regset *regset;
+ union {
+ struct regset_get get;
+ struct regset_set set;
+ } u;
+ unsigned int pos;
+ unsigned int count;
+ int ret;
+};
+
+static int
+access_elf_gpreg(struct task_struct *target, struct unw_frame_info *info,
+ unsigned long addr, unsigned long *data, int write_access)
+{
+ struct pt_regs *pt;
+ unsigned long *ptr = NULL;
+ int ret;
+ char nat = 0;
+
+ pt = task_pt_regs(target);
+ switch (addr) {
+ case ELF_GR_OFFSET(1):
+ ptr = &pt->r1;
+ break;
+ case ELF_GR_OFFSET(2):
+ case ELF_GR_OFFSET(3):
+ ptr = (void *)&pt->r2 + (addr - ELF_GR_OFFSET(2));
+ break;
+ case ELF_GR_OFFSET(4) ... ELF_GR_OFFSET(7):
+ if (write_access) {
+ /* read NaT bit first: */
+ unsigned long dummy;
+
+ ret = unw_get_gr(info, addr/8, &dummy, &nat);
+ if (ret < 0)
+ return ret;
+ }
+ return unw_access_gr(info, addr/8, data, &nat, write_access);
+ case ELF_GR_OFFSET(8) ... ELF_GR_OFFSET(11):
+ ptr = (void *)&pt->r8 + addr - ELF_GR_OFFSET(8);
+ break;
+ case ELF_GR_OFFSET(12):
+ case ELF_GR_OFFSET(13):
+ ptr = (void *)&pt->r12 + addr - ELF_GR_OFFSET(12);
+ break;
+ case ELF_GR_OFFSET(14):
+ ptr = &pt->r14;
+ break;
+ case ELF_GR_OFFSET(15):
+ ptr = &pt->r15;
+ }
+ if (write_access)
+ *ptr = *data;
+ else
+ *data = *ptr;
+ return 0;
+}
+
+static int
+access_elf_breg(struct task_struct *target, struct unw_frame_info *info,
+ unsigned long addr, unsigned long *data, int write_access)
+{
+ struct pt_regs *pt;
+ unsigned long *ptr = NULL;
+
+ pt = task_pt_regs(target);
+ switch (addr) {
+ case ELF_BR_OFFSET(0):
+ ptr = &pt->b0;
+ break;
+ case ELF_BR_OFFSET(1) ... ELF_BR_OFFSET(5):
+ return unw_access_br(info, (addr - ELF_BR_OFFSET(0))/8,
+ data, write_access);
+ case ELF_BR_OFFSET(6):
+ ptr = &pt->b6;
+ break;
+ case ELF_BR_OFFSET(7):
+ ptr = &pt->b7;
+ }
+ if (write_access)
+ *ptr = *data;
+ else
+ *data = *ptr;
+ return 0;
+}
+
+static int
+access_elf_areg(struct task_struct *target, struct unw_frame_info *info,
+ unsigned long addr, unsigned long *data, int write_access)
+{
+ struct pt_regs *pt;
+ unsigned long cfm, urbs_end;
+ unsigned long *ptr = NULL;
+
+ pt = task_pt_regs(target);
+ if (addr >= ELF_AR_RSC_OFFSET && addr <= ELF_AR_SSD_OFFSET) {
+ switch (addr) {
+ case ELF_AR_RSC_OFFSET:
+ /* force PL3 */
+ if (write_access)
+ pt->ar_rsc = *data | (3 << 2);
+ else
+ *data = pt->ar_rsc;
+ return 0;
+ case ELF_AR_BSP_OFFSET:
+ /*
+ * By convention, we use PT_AR_BSP to refer to
+ * the end of the user-level backing store.
+ * Use ia64_rse_skip_regs(PT_AR_BSP, -CFM.sof)
+ * to get the real value of ar.bsp at the time
+ * the kernel was entered.
+ *
+ * Furthermore, when changing the contents of
+ * PT_AR_BSP (or PT_CFM) while the task is
+ * blocked in a system call, convert the state
+ * so that the non-system-call exit
+ * path is used. This ensures that the proper
+ * state will be picked up when resuming
+ * execution. However, it *also* means that
+ * once we write PT_AR_BSP/PT_CFM, it won't be
+ * possible to modify the syscall arguments of
+ * the pending system call any longer. This
+ * shouldn't be an issue because modifying
+ * PT_AR_BSP/PT_CFM generally implies that
+ * we're either abandoning the pending system
+ * call or that we defer it's re-execution
+ * (e.g., due to GDB doing an inferior
+ * function call).
+ */
+ urbs_end = ia64_get_user_rbs_end(target, pt, &cfm);
+ if (write_access) {
+ if (*data != urbs_end) {
+ if (in_syscall(pt))
+ convert_to_non_syscall(target,
+ pt,
+ cfm);
+ /*
+ * Simulate user-level write
+ * of ar.bsp:
+ */
+ pt->loadrs = 0;
+ pt->ar_bspstore = *data;
+ }
+ } else
+ *data = urbs_end;
+ return 0;
+ case ELF_AR_BSPSTORE_OFFSET:
+ ptr = &pt->ar_bspstore;
+ break;
+ case ELF_AR_RNAT_OFFSET:
+ ptr = &pt->ar_rnat;
+ break;
+ case ELF_AR_CCV_OFFSET:
+ ptr = &pt->ar_ccv;
+ break;
+ case ELF_AR_UNAT_OFFSET:
+ ptr = &pt->ar_unat;
+ break;
+ case ELF_AR_FPSR_OFFSET:
+ ptr = &pt->ar_fpsr;
+ break;
+ case ELF_AR_PFS_OFFSET:
+ ptr = &pt->ar_pfs;
+ break;
+ case ELF_AR_LC_OFFSET:
+ return unw_access_ar(info, UNW_AR_LC, data,
+ write_access);
+ case ELF_AR_EC_OFFSET:
+ return unw_access_ar(info, UNW_AR_EC, data,
+ write_access);
+ case ELF_AR_CSD_OFFSET:
+ ptr = &pt->ar_csd;
+ break;
+ case ELF_AR_SSD_OFFSET:
+ ptr = &pt->ar_ssd;
+ }
+ } else if (addr >= ELF_CR_IIP_OFFSET && addr <= ELF_CR_IPSR_OFFSET) {
+ switch (addr) {
+ case ELF_CR_IIP_OFFSET:
+ ptr = &pt->cr_iip;
+ break;
+ case ELF_CFM_OFFSET:
+ urbs_end = ia64_get_user_rbs_end(target, pt, &cfm);
+ if (write_access) {
+ if (((cfm ^ *data) & PFM_MASK) != 0) {
+ if (in_syscall(pt))
+ convert_to_non_syscall(target,
+ pt,
+ cfm);
+ pt->cr_ifs = ((pt->cr_ifs & ~PFM_MASK)
+ | (*data & PFM_MASK));
+ }
+ } else
+ *data = cfm;
+ return 0;
+ case ELF_CR_IPSR_OFFSET:
+ if (write_access) {
+ unsigned long tmp = *data;
+ /* psr.ri==3 is a reserved value: SDM 2:25 */
+ if ((tmp & IA64_PSR_RI) == IA64_PSR_RI)
+ tmp &= ~IA64_PSR_RI;
+ pt->cr_ipsr = ((tmp & IPSR_MASK)
+ | (pt->cr_ipsr & ~IPSR_MASK));
+ } else
+ *data = (pt->cr_ipsr & IPSR_MASK);
+ return 0;
+ }
+ } else if (addr == ELF_NAT_OFFSET)
+ return access_nat_bits(target, pt, info,
+ data, write_access);
+ else if (addr == ELF_PR_OFFSET)
+ ptr = &pt->pr;
+ else
+ return -1;
+
+ if (write_access)
+ *ptr = *data;
+ else
+ *data = *ptr;
+
+ return 0;
+}
+
+static int
+access_elf_reg(struct task_struct *target, struct unw_frame_info *info,
+ unsigned long addr, unsigned long *data, int write_access)
+{
+ if (addr >= ELF_GR_OFFSET(1) && addr <= ELF_GR_OFFSET(15))
+ return access_elf_gpreg(target, info, addr, data, write_access);
+ else if (addr >= ELF_BR_OFFSET(0) && addr <= ELF_BR_OFFSET(7))
+ return access_elf_breg(target, info, addr, data, write_access);
+ else
+ return access_elf_areg(target, info, addr, data, write_access);
+}
+
+void do_gpregs_get(struct unw_frame_info *info, void *arg)
+{
+ struct pt_regs *pt;
+ struct regset_getset *dst = arg;
+ elf_greg_t tmp[16];
+ unsigned int i, index, min_copy;
+
+ if (unw_unwind_to_user(info) < 0)
+ return;
+
+ /*
+ * coredump format:
+ * r0-r31
+ * NaT bits (for r0-r31; bit N == 1 iff rN is a NaT)
+ * predicate registers (p0-p63)
+ * b0-b7
+ * ip cfm user-mask
+ * ar.rsc ar.bsp ar.bspstore ar.rnat
+ * ar.ccv ar.unat ar.fpsr ar.pfs ar.lc ar.ec
+ */
+
+
+ /* Skip r0 */
+ if (dst->count > 0 && dst->pos < ELF_GR_OFFSET(1)) {
+ dst->ret = user_regset_copyout_zero(&dst->pos, &dst->count,
+ &dst->u.get.kbuf,
+ &dst->u.get.ubuf,
+ 0, ELF_GR_OFFSET(1));
+ if (dst->ret || dst->count == 0)
+ return;
+ }
+
+ /* gr1 - gr15 */
+ if (dst->count > 0 && dst->pos < ELF_GR_OFFSET(16)) {
+ index = (dst->pos - ELF_GR_OFFSET(1)) / sizeof(elf_greg_t);
+ min_copy = ELF_GR_OFFSET(16) > (dst->pos + dst->count) ?
+ (dst->pos + dst->count) : ELF_GR_OFFSET(16);
+ for (i = dst->pos; i < min_copy; i += sizeof(elf_greg_t),
+ index++)
+ if (access_elf_reg(dst->target, info, i,
+ &tmp[index], 0) < 0) {
+ dst->ret = -EIO;
+ return;
+ }
+ dst->ret = user_regset_copyout(&dst->pos, &dst->count,
+ &dst->u.get.kbuf, &dst->u.get.ubuf, tmp,
+ ELF_GR_OFFSET(1), ELF_GR_OFFSET(16));
+ if (dst->ret || dst->count == 0)
+ return;
+ }
+
+ /* r16-r31 */
+ if (dst->count > 0 && dst->pos < ELF_NAT_OFFSET) {
+ pt = task_pt_regs(dst->target);
+ dst->ret = user_regset_copyout(&dst->pos, &dst->count,
+ &dst->u.get.kbuf, &dst->u.get.ubuf, &pt->r16,
+ ELF_GR_OFFSET(16), ELF_NAT_OFFSET);
+ if (dst->ret || dst->count == 0)
+ return;
+ }
+
+ /* nat, pr, b0 - b7 */
+ if (dst->count > 0 && dst->pos < ELF_CR_IIP_OFFSET) {
+ index = (dst->pos - ELF_NAT_OFFSET) / sizeof(elf_greg_t);
+ min_copy = ELF_CR_IIP_OFFSET > (dst->pos + dst->count) ?
+ (dst->pos + dst->count) : ELF_CR_IIP_OFFSET;
+ for (i = dst->pos; i < min_copy; i += sizeof(elf_greg_t),
+ index++)
+ if (access_elf_reg(dst->target, info, i,
+ &tmp[index], 0) < 0) {
+ dst->ret = -EIO;
+ return;
+ }
+ dst->ret = user_regset_copyout(&dst->pos, &dst->count,
+ &dst->u.get.kbuf, &dst->u.get.ubuf, tmp,
+ ELF_NAT_OFFSET, ELF_CR_IIP_OFFSET);
+ if (dst->ret || dst->count == 0)
+ return;
+ }
+
+ /* ip cfm psr ar.rsc ar.bsp ar.bspstore ar.rnat
+ * ar.ccv ar.unat ar.fpsr ar.pfs ar.lc ar.ec ar.csd ar.ssd
+ */
+ if (dst->count > 0 && dst->pos < (ELF_AR_END_OFFSET)) {
+ index = (dst->pos - ELF_CR_IIP_OFFSET) / sizeof(elf_greg_t);
+ min_copy = ELF_AR_END_OFFSET > (dst->pos + dst->count) ?
+ (dst->pos + dst->count) : ELF_AR_END_OFFSET;
+ for (i = dst->pos; i < min_copy; i += sizeof(elf_greg_t),
+ index++)
+ if (access_elf_reg(dst->target, info, i,
+ &tmp[index], 0) < 0) {
+ dst->ret = -EIO;
+ return;
+ }
+ dst->ret = user_regset_copyout(&dst->pos, &dst->count,
+ &dst->u.get.kbuf, &dst->u.get.ubuf, tmp,
+ ELF_CR_IIP_OFFSET, ELF_AR_END_OFFSET);
+ }
+}
+
+void do_gpregs_set(struct unw_frame_info *info, void *arg)
+{
+ struct pt_regs *pt;
+ struct regset_getset *dst = arg;
+ elf_greg_t tmp[16];
+ unsigned int i, index;
+
+ if (unw_unwind_to_user(info) < 0)
+ return;
+
+ /* Skip r0 */
+ if (dst->count > 0 && dst->pos < ELF_GR_OFFSET(1)) {
+ dst->ret = user_regset_copyin_ignore(&dst->pos, &dst->count,
+ &dst->u.set.kbuf,
+ &dst->u.set.ubuf,
+ 0, ELF_GR_OFFSET(1));
+ if (dst->ret || dst->count == 0)
+ return;
+ }
+
+ /* gr1-gr15 */
+ if (dst->count > 0 && dst->pos < ELF_GR_OFFSET(16)) {
+ i = dst->pos;
+ index = (dst->pos - ELF_GR_OFFSET(1)) / sizeof(elf_greg_t);
+ dst->ret = user_regset_copyin(&dst->pos, &dst->count,
+ &dst->u.set.kbuf, &dst->u.set.ubuf, tmp,
+ ELF_GR_OFFSET(1), ELF_GR_OFFSET(16));
+ if (dst->ret)
+ return;
+ for ( ; i < dst->pos; i += sizeof(elf_greg_t), index++)
+ if (access_elf_reg(dst->target, info, i,
+ &tmp[index], 1) < 0) {
+ dst->ret = -EIO;
+ return;
+ }
+ if (dst->count == 0)
+ return;
+ }
+
+ /* gr16-gr31 */
+ if (dst->count > 0 && dst->pos < ELF_NAT_OFFSET) {
+ pt = task_pt_regs(dst->target);
+ dst->ret = user_regset_copyin(&dst->pos, &dst->count,
+ &dst->u.set.kbuf, &dst->u.set.ubuf, &pt->r16,
+ ELF_GR_OFFSET(16), ELF_NAT_OFFSET);
+ if (dst->ret || dst->count == 0)
+ return;
+ }
+
+ /* nat, pr, b0 - b7 */
+ if (dst->count > 0 && dst->pos < ELF_CR_IIP_OFFSET) {
+ i = dst->pos;
+ index = (dst->pos - ELF_NAT_OFFSET) / sizeof(elf_greg_t);
+ dst->ret = user_regset_copyin(&dst->pos, &dst->count,
+ &dst->u.set.kbuf, &dst->u.set.ubuf, tmp,
+ ELF_NAT_OFFSET, ELF_CR_IIP_OFFSET);
+ if (dst->ret)
+ return;
+ for (; i < dst->pos; i += sizeof(elf_greg_t), index++)
+ if (access_elf_reg(dst->target, info, i,
+ &tmp[index], 1) < 0) {
+ dst->ret = -EIO;
+ return;
+ }
+ if (dst->count == 0)
+ return;
+ }
+
+ /* ip cfm psr ar.rsc ar.bsp ar.bspstore ar.rnat
+ * ar.ccv ar.unat ar.fpsr ar.pfs ar.lc ar.ec ar.csd ar.ssd
+ */
+ if (dst->count > 0 && dst->pos < (ELF_AR_END_OFFSET)) {
+ i = dst->pos;
+ index = (dst->pos - ELF_CR_IIP_OFFSET) / sizeof(elf_greg_t);
+ dst->ret = user_regset_copyin(&dst->pos, &dst->count,
+ &dst->u.set.kbuf, &dst->u.set.ubuf, tmp,
+ ELF_CR_IIP_OFFSET, ELF_AR_END_OFFSET);
+ if (dst->ret)
+ return;
+ for ( ; i < dst->pos; i += sizeof(elf_greg_t), index++)
+ if (access_elf_reg(dst->target, info, i,
+ &tmp[index], 1) < 0) {
+ dst->ret = -EIO;
+ return;
+ }
+ }
+}
+
+#define ELF_FP_OFFSET(i) (i * sizeof(elf_fpreg_t))
+
+void do_fpregs_get(struct unw_frame_info *info, void *arg)
+{
+ struct regset_getset *dst = arg;
+ struct task_struct *task = dst->target;
+ elf_fpreg_t tmp[30];
+ int index, min_copy, i;
+
+ if (unw_unwind_to_user(info) < 0)
+ return;
+
+ /* Skip pos 0 and 1 */
+ if (dst->count > 0 && dst->pos < ELF_FP_OFFSET(2)) {
+ dst->ret = user_regset_copyout_zero(&dst->pos, &dst->count,
+ &dst->u.get.kbuf,
+ &dst->u.get.ubuf,
+ 0, ELF_FP_OFFSET(2));
+ if (dst->count == 0 || dst->ret)
+ return;
+ }
+
+ /* fr2-fr31 */
+ if (dst->count > 0 && dst->pos < ELF_FP_OFFSET(32)) {
+ index = (dst->pos - ELF_FP_OFFSET(2)) / sizeof(elf_fpreg_t);
+
+ min_copy = min(((unsigned int)ELF_FP_OFFSET(32)),
+ dst->pos + dst->count);
+ for (i = dst->pos; i < min_copy; i += sizeof(elf_fpreg_t),
+ index++)
+ if (unw_get_fr(info, i / sizeof(elf_fpreg_t),
+ &tmp[index])) {
+ dst->ret = -EIO;
+ return;
+ }
+ dst->ret = user_regset_copyout(&dst->pos, &dst->count,
+ &dst->u.get.kbuf, &dst->u.get.ubuf, tmp,
+ ELF_FP_OFFSET(2), ELF_FP_OFFSET(32));
+ if (dst->count == 0 || dst->ret)
+ return;
+ }
+
+ /* fph */
+ if (dst->count > 0) {
+ ia64_flush_fph(dst->target);
+ if (task->thread.flags & IA64_THREAD_FPH_VALID)
+ dst->ret = user_regset_copyout(
+ &dst->pos, &dst->count,
+ &dst->u.get.kbuf, &dst->u.get.ubuf,
+ &dst->target->thread.fph,
+ ELF_FP_OFFSET(32), -1);
+ else
+ /* Zero fill instead. */
+ dst->ret = user_regset_copyout_zero(
+ &dst->pos, &dst->count,
+ &dst->u.get.kbuf, &dst->u.get.ubuf,
+ ELF_FP_OFFSET(32), -1);
+ }
+}
+
+void do_fpregs_set(struct unw_frame_info *info, void *arg)
+{
+ struct regset_getset *dst = arg;
+ elf_fpreg_t fpreg, tmp[30];
+ int index, start, end;
+
+ if (unw_unwind_to_user(info) < 0)
+ return;
+
+ /* Skip pos 0 and 1 */
+ if (dst->count > 0 && dst->pos < ELF_FP_OFFSET(2)) {
+ dst->ret = user_regset_copyin_ignore(&dst->pos, &dst->count,
+ &dst->u.set.kbuf,
+ &dst->u.set.ubuf,
+ 0, ELF_FP_OFFSET(2));
+ if (dst->count == 0 || dst->ret)
+ return;
+ }
+
+ /* fr2-fr31 */
+ if (dst->count > 0 && dst->pos < ELF_FP_OFFSET(32)) {
+ start = dst->pos;
+ end = min(((unsigned int)ELF_FP_OFFSET(32)),
+ dst->pos + dst->count);
+ dst->ret = user_regset_copyin(&dst->pos, &dst->count,
+ &dst->u.set.kbuf, &dst->u.set.ubuf, tmp,
+ ELF_FP_OFFSET(2), ELF_FP_OFFSET(32));
+ if (dst->ret)
+ return;
+
+ if (start & 0xF) { /* only write high part */
+ if (unw_get_fr(info, start / sizeof(elf_fpreg_t),
+ &fpreg)) {
+ dst->ret = -EIO;
+ return;
+ }
+ tmp[start / sizeof(elf_fpreg_t) - 2].u.bits[0]
+ = fpreg.u.bits[0];
+ start &= ~0xFUL;
+ }
+ if (end & 0xF) { /* only write low part */
+ if (unw_get_fr(info, end / sizeof(elf_fpreg_t),
+ &fpreg)) {
+ dst->ret = -EIO;
+ return;
+ }
+ tmp[end / sizeof(elf_fpreg_t) - 2].u.bits[1]
+ = fpreg.u.bits[1];
+ end = (end + 0xF) & ~0xFUL;
+ }
+
+ for ( ; start < end ; start += sizeof(elf_fpreg_t)) {
+ index = start / sizeof(elf_fpreg_t);
+ if (unw_set_fr(info, index, tmp[index - 2])) {
+ dst->ret = -EIO;
+ return;
+ }
+ }
+ if (dst->ret || dst->count == 0)
+ return;
+ }
+
+ /* fph */
+ if (dst->count > 0 && dst->pos < ELF_FP_OFFSET(128)) {
+ ia64_sync_fph(dst->target);
+ dst->ret = user_regset_copyin(&dst->pos, &dst->count,
+ &dst->u.set.kbuf,
+ &dst->u.set.ubuf,
+ &dst->target->thread.fph,
+ ELF_FP_OFFSET(32), -1);
+ }
+}
+
+static int
+do_regset_call(void (*call)(struct unw_frame_info *, void *),
+ struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ struct regset_getset info = { .target = target, .regset = regset,
+ .pos = pos, .count = count,
+ .u.set = { .kbuf = kbuf, .ubuf = ubuf },
+ .ret = 0 };
+
+ if (target == current)
+ unw_init_running(call, &info);
+ else {
+ struct unw_frame_info ufi;
+ memset(&ufi, 0, sizeof(ufi));
+ unw_init_from_blocked_task(&ufi, target);
+ (*call)(&ufi, &info);
+ }
+
+ return info.ret;
+}
+
+static int
+gpregs_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ return do_regset_call(do_gpregs_get, target, regset, pos, count,
+ kbuf, ubuf);
+}
+
+static int gpregs_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ return do_regset_call(do_gpregs_set, target, regset, pos, count,
+ kbuf, ubuf);
+}
+
+static void do_gpregs_writeback(struct unw_frame_info *info, void *arg)
+{
+ do_sync_rbs(info, ia64_sync_user_rbs);
+}
+
+/*
+ * This is called to write back the register backing store.
+ * ptrace does this before it stops, so that a tracer reading the user
+ * memory after the thread stops will get the current register data.
+ */
+static int
+gpregs_writeback(struct task_struct *target,
+ const struct user_regset *regset,
+ int now)
+{
+ if (test_and_set_tsk_thread_flag(target, TIF_RESTORE_RSE))
+ return 0;
+ tsk_set_notify_resume(target);
+ return do_regset_call(do_gpregs_writeback, target, regset, 0, 0,
+ NULL, NULL);
+}
+
+static int
+fpregs_active(struct task_struct *target, const struct user_regset *regset)
+{
+ return (target->thread.flags & IA64_THREAD_FPH_VALID) ? 128 : 32;
+}
+
+static int fpregs_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ return do_regset_call(do_fpregs_get, target, regset, pos, count,
+ kbuf, ubuf);
+}
+
+static int fpregs_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ return do_regset_call(do_fpregs_set, target, regset, pos, count,
+ kbuf, ubuf);
+}
+
+static int
+access_uarea(struct task_struct *child, unsigned long addr,
+ unsigned long *data, int write_access)
+{
+ unsigned int pos = -1; /* an invalid value */
+ int ret;
+ unsigned long *ptr, regnum;
+
+ if ((addr & 0x7) != 0) {
+ dprintk("ptrace: unaligned register address 0x%lx\n", addr);
+ return -1;
+ }
+ if ((addr >= PT_NAT_BITS + 8 && addr < PT_F2) ||
+ (addr >= PT_R7 + 8 && addr < PT_B1) ||
+ (addr >= PT_AR_LC + 8 && addr < PT_CR_IPSR) ||
+ (addr >= PT_AR_SSD + 8 && addr < PT_DBR)) {
+ dprintk("ptrace: rejecting access to register "
+ "address 0x%lx\n", addr);
+ return -1;
+ }
+
+ switch (addr) {
+ case PT_F32 ... (PT_F127 + 15):
+ pos = addr - PT_F32 + ELF_FP_OFFSET(32);
+ break;
+ case PT_F2 ... (PT_F5 + 15):
+ pos = addr - PT_F2 + ELF_FP_OFFSET(2);
+ break;
+ case PT_F10 ... (PT_F31 + 15):
+ pos = addr - PT_F10 + ELF_FP_OFFSET(10);
+ break;
+ case PT_F6 ... (PT_F9 + 15):
+ pos = addr - PT_F6 + ELF_FP_OFFSET(6);
+ break;
+ }
+
+ if (pos != -1) {
+ if (write_access)
+ ret = fpregs_set(child, NULL, pos,
+ sizeof(unsigned long), data, NULL);
+ else
+ ret = fpregs_get(child, NULL, pos,
+ sizeof(unsigned long), data, NULL);
+ if (ret != 0)
+ return -1;
+ return 0;
+ }
+
+ switch (addr) {
+ case PT_NAT_BITS:
+ pos = ELF_NAT_OFFSET;
+ break;
+ case PT_R4 ... PT_R7:
+ pos = addr - PT_R4 + ELF_GR_OFFSET(4);
+ break;
+ case PT_B1 ... PT_B5:
+ pos = addr - PT_B1 + ELF_BR_OFFSET(1);
+ break;
+ case PT_AR_EC:
+ pos = ELF_AR_EC_OFFSET;
+ break;
+ case PT_AR_LC:
+ pos = ELF_AR_LC_OFFSET;
+ break;
+ case PT_CR_IPSR:
+ pos = ELF_CR_IPSR_OFFSET;
+ break;
+ case PT_CR_IIP:
+ pos = ELF_CR_IIP_OFFSET;
+ break;
+ case PT_CFM:
+ pos = ELF_CFM_OFFSET;
+ break;
+ case PT_AR_UNAT:
+ pos = ELF_AR_UNAT_OFFSET;
+ break;
+ case PT_AR_PFS:
+ pos = ELF_AR_PFS_OFFSET;
+ break;
+ case PT_AR_RSC:
+ pos = ELF_AR_RSC_OFFSET;
+ break;
+ case PT_AR_RNAT:
+ pos = ELF_AR_RNAT_OFFSET;
+ break;
+ case PT_AR_BSPSTORE:
+ pos = ELF_AR_BSPSTORE_OFFSET;
+ break;
+ case PT_PR:
+ pos = ELF_PR_OFFSET;
+ break;
+ case PT_B6:
+ pos = ELF_BR_OFFSET(6);
+ break;
+ case PT_AR_BSP:
+ pos = ELF_AR_BSP_OFFSET;
+ break;
+ case PT_R1 ... PT_R3:
+ pos = addr - PT_R1 + ELF_GR_OFFSET(1);
+ break;
+ case PT_R12 ... PT_R15:
+ pos = addr - PT_R12 + ELF_GR_OFFSET(12);
+ break;
+ case PT_R8 ... PT_R11:
+ pos = addr - PT_R8 + ELF_GR_OFFSET(8);
+ break;
+ case PT_R16 ... PT_R31:
+ pos = addr - PT_R16 + ELF_GR_OFFSET(16);
+ break;
+ case PT_AR_CCV:
+ pos = ELF_AR_CCV_OFFSET;
+ break;
+ case PT_AR_FPSR:
+ pos = ELF_AR_FPSR_OFFSET;
+ break;
+ case PT_B0:
+ pos = ELF_BR_OFFSET(0);
+ break;
+ case PT_B7:
+ pos = ELF_BR_OFFSET(7);
+ break;
+ case PT_AR_CSD:
+ pos = ELF_AR_CSD_OFFSET;
+ break;
+ case PT_AR_SSD:
+ pos = ELF_AR_SSD_OFFSET;
+ break;
+ }
+
+ if (pos != -1) {
+ if (write_access)
+ ret = gpregs_set(child, NULL, pos,
+ sizeof(unsigned long), data, NULL);
+ else
+ ret = gpregs_get(child, NULL, pos,
+ sizeof(unsigned long), data, NULL);
+ if (ret != 0)
+ return -1;
+ return 0;
+ }
+
+ /* access debug registers */
+ if (addr >= PT_IBR) {
+ regnum = (addr - PT_IBR) >> 3;
+ ptr = &child->thread.ibr[0];
+ } else {
+ regnum = (addr - PT_DBR) >> 3;
+ ptr = &child->thread.dbr[0];
+ }
+
+ if (regnum >= 8) {
+ dprintk("ptrace: rejecting access to register "
+ "address 0x%lx\n", addr);
+ return -1;
+ }
+#ifdef CONFIG_PERFMON
+ /*
+ * Check if debug registers are used by perfmon. This
+ * test must be done once we know that we can do the
+ * operation, i.e. the arguments are all valid, but
+ * before we start modifying the state.
+ *
+ * Perfmon needs to keep a count of how many processes
+ * are trying to modify the debug registers for system
+ * wide monitoring sessions.
+ *
+ * We also include read access here, because they may
+ * cause the PMU-installed debug register state
+ * (dbr[], ibr[]) to be reset. The two arrays are also
+ * used by perfmon, but we do not use
+ * IA64_THREAD_DBG_VALID. The registers are restored
+ * by the PMU context switch code.
+ */
+ if (pfm_use_debug_registers(child))
+ return -1;
+#endif
+
+ if (!(child->thread.flags & IA64_THREAD_DBG_VALID)) {
+ child->thread.flags |= IA64_THREAD_DBG_VALID;
+ memset(child->thread.dbr, 0,
+ sizeof(child->thread.dbr));
+ memset(child->thread.ibr, 0,
+ sizeof(child->thread.ibr));
+ }
+
+ ptr += regnum;
+
+ if ((regnum & 1) && write_access) {
+ /* don't let the user set kernel-level breakpoints: */
+ *ptr = *data & ~(7UL << 56);
+ return 0;
+ }
+ if (write_access)
+ *ptr = *data;
+ else
+ *data = *ptr;
+ return 0;
+}
+
+static const struct user_regset native_regsets[] = {
+ {
+ .core_note_type = NT_PRSTATUS,
+ .n = ELF_NGREG,
+ .size = sizeof(elf_greg_t), .align = sizeof(elf_greg_t),
+ .get = gpregs_get, .set = gpregs_set,
+ .writeback = gpregs_writeback
+ },
+ {
+ .core_note_type = NT_PRFPREG,
+ .n = ELF_NFPREG,
+ .size = sizeof(elf_fpreg_t), .align = sizeof(elf_fpreg_t),
+ .get = fpregs_get, .set = fpregs_set, .active = fpregs_active
+ },
+};
+
+static const struct user_regset_view user_ia64_view = {
+ .name = "ia64",
+ .e_machine = EM_IA_64,
+ .regsets = native_regsets, .n = ARRAY_SIZE(native_regsets)
+};
+
+const struct user_regset_view *task_user_regset_view(struct task_struct *tsk)
+{
+#ifdef CONFIG_IA32_SUPPORT
+ extern const struct user_regset_view user_ia32_view;
+ if (IS_IA32_PROCESS(task_pt_regs(tsk)))
+ return &user_ia32_view;
+#endif
+ return &user_ia64_view;
+}
diff --git a/arch/ia64/kernel/semaphore.c b/arch/ia64/kernel/semaphore.c
deleted file mode 100644
index 2724ef3fbae..00000000000
--- a/arch/ia64/kernel/semaphore.c
+++ /dev/null
@@ -1,165 +0,0 @@
-/*
- * IA-64 semaphore implementation (derived from x86 version).
- *
- * Copyright (C) 1999-2000, 2002 Hewlett-Packard Co
- * David Mosberger-Tang <davidm@hpl.hp.com>
- */
-
-/*
- * Semaphores are implemented using a two-way counter: The "count"
- * variable is decremented for each process that tries to acquire the
- * semaphore, while the "sleepers" variable is a count of such
- * acquires.
- *
- * Notably, the inline "up()" and "down()" functions can efficiently
- * test if they need to do any extra work (up needs to do something
- * only if count was negative before the increment operation.
- *
- * "sleeping" and the contention routine ordering is protected
- * by the spinlock in the semaphore's waitqueue head.
- *
- * Note that these functions are only called when there is contention
- * on the lock, and as such all this is the "non-critical" part of the
- * whole semaphore business. The critical part is the inline stuff in
- * <asm/semaphore.h> where we want to avoid any extra jumps and calls.
- */
-#include <linux/sched.h>
-#include <linux/init.h>
-
-#include <asm/errno.h>
-#include <asm/semaphore.h>
-
-/*
- * Logic:
- * - Only on a boundary condition do we need to care. When we go
- * from a negative count to a non-negative, we wake people up.
- * - When we go from a non-negative count to a negative do we
- * (a) synchronize with the "sleepers" count and (b) make sure
- * that we're on the wakeup list before we synchronize so that
- * we cannot lose wakeup events.
- */
-
-void
-__up (struct semaphore *sem)
-{
- wake_up(&sem->wait);
-}
-
-void __sched __down (struct semaphore *sem)
-{
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
- unsigned long flags;
-
- tsk->state = TASK_UNINTERRUPTIBLE;
- spin_lock_irqsave(&sem->wait.lock, flags);
- add_wait_queue_exclusive_locked(&sem->wait, &wait);
-
- sem->sleepers++;
- for (;;) {
- int sleepers = sem->sleepers;
-
- /*
- * Add "everybody else" into it. They aren't
- * playing, because we own the spinlock in
- * the wait_queue_head.
- */
- if (!atomic_add_negative(sleepers - 1, &sem->count)) {
- sem->sleepers = 0;
- break;
- }
- sem->sleepers = 1; /* us - see -1 above */
- spin_unlock_irqrestore(&sem->wait.lock, flags);
-
- schedule();
-
- spin_lock_irqsave(&sem->wait.lock, flags);
- tsk->state = TASK_UNINTERRUPTIBLE;
- }
- remove_wait_queue_locked(&sem->wait, &wait);
- wake_up_locked(&sem->wait);
- spin_unlock_irqrestore(&sem->wait.lock, flags);
- tsk->state = TASK_RUNNING;
-}
-
-int __sched __down_interruptible (struct semaphore * sem)
-{
- int retval = 0;
- struct task_struct *tsk = current;
- DECLARE_WAITQUEUE(wait, tsk);
- unsigned long flags;
-
- tsk->state = TASK_INTERRUPTIBLE;
- spin_lock_irqsave(&sem->wait.lock, flags);
- add_wait_queue_exclusive_locked(&sem->wait, &wait);
-
- sem->sleepers ++;
- for (;;) {
- int sleepers = sem->sleepers;
-
- /*
- * With signals pending, this turns into
- * the trylock failure case - we won't be
- * sleeping, and we* can't get the lock as
- * it has contention. Just correct the count
- * and exit.
- */
- if (signal_pending(current)) {
- retval = -EINTR;
- sem->sleepers = 0;
- atomic_add(sleepers, &sem->count);
- break;
- }
-
- /*
- * Add "everybody else" into it. They aren't
- * playing, because we own the spinlock in
- * wait_queue_head. The "-1" is because we're
- * still hoping to get the semaphore.
- */
- if (!atomic_add_negative(sleepers - 1, &sem->count)) {
- sem->sleepers = 0;
- break;
- }
- sem->sleepers = 1; /* us - see -1 above */
- spin_unlock_irqrestore(&sem->wait.lock, flags);
-
- schedule();
-
- spin_lock_irqsave(&sem->wait.lock, flags);
- tsk->state = TASK_INTERRUPTIBLE;
- }
- remove_wait_queue_locked(&sem->wait, &wait);
- wake_up_locked(&sem->wait);
- spin_unlock_irqrestore(&sem->wait.lock, flags);
-
- tsk->state = TASK_RUNNING;
- return retval;
-}
-
-/*
- * Trylock failed - make sure we correct for having decremented the
- * count.
- */
-int
-__down_trylock (struct semaphore *sem)
-{
- unsigned long flags;
- int sleepers;
-
- spin_lock_irqsave(&sem->wait.lock, flags);
- sleepers = sem->sleepers + 1;
- sem->sleepers = 0;
-
- /*
- * Add "everybody else" and us into it. They aren't
- * playing, because we own the spinlock in the
- * wait_queue_head.
- */
- if (!atomic_add_negative(sleepers, &sem->count)) {
- wake_up_locked(&sem->wait);
- }
-
- spin_unlock_irqrestore(&sem->wait.lock, flags);
- return 1;
-}
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index 4aa9eaea76c..5015ca1275c 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -59,6 +59,7 @@
#include <asm/setup.h>
#include <asm/smp.h>
#include <asm/system.h>
+#include <asm/tlbflush.h>
#include <asm/unistd.h>
#include <asm/hpsim.h>
@@ -176,6 +177,29 @@ filter_rsvd_memory (unsigned long start, unsigned long end, void *arg)
return 0;
}
+/*
+ * Similar to "filter_rsvd_memory()", but the reserved memory ranges
+ * are not filtered out.
+ */
+int __init
+filter_memory(unsigned long start, unsigned long end, void *arg)
+{
+ void (*func)(unsigned long, unsigned long, int);
+
+#if IGNORE_PFN0
+ if (start == PAGE_OFFSET) {
+ printk(KERN_WARNING "warning: skipping physical page 0\n");
+ start += PAGE_SIZE;
+ if (start >= end)
+ return 0;
+ }
+#endif
+ func = arg;
+ if (start < end)
+ call_pernode_memory(__pa(start), end - start, func);
+ return 0;
+}
+
static void __init
sort_regions (struct rsvd_region *rsvd_region, int max)
{
@@ -493,6 +517,8 @@ setup_arch (char **cmdline_p)
acpi_table_init();
# ifdef CONFIG_ACPI_NUMA
acpi_numa_init();
+ per_cpu_scan_finalize((cpus_weight(early_cpu_possible_map) == 0 ?
+ 32 : cpus_weight(early_cpu_possible_map)), additional_cpus);
# endif
#else
# ifdef CONFIG_SMP
@@ -946,9 +972,10 @@ cpu_init (void)
#endif
/* set ia64_ctx.max_rid to the maximum RID that is supported by all CPUs: */
- if (ia64_pal_vm_summary(NULL, &vmi) == 0)
+ if (ia64_pal_vm_summary(NULL, &vmi) == 0) {
max_ctx = (1U << (vmi.pal_vm_info_2_s.rid_size - 3)) - 1;
- else {
+ setup_ptcg_sem(vmi.pal_vm_info_2_s.max_purges, NPTCG_FROM_PAL);
+ } else {
printk(KERN_WARNING "cpu_init: PAL VM summary failed, assuming 18 RID bits\n");
max_ctx = (1U << 15) - 1; /* use architected minimum */
}
diff --git a/arch/ia64/kernel/smp.c b/arch/ia64/kernel/smp.c
index 4e446aa5f4a..9a9d4c48933 100644
--- a/arch/ia64/kernel/smp.c
+++ b/arch/ia64/kernel/smp.c
@@ -213,6 +213,19 @@ send_IPI_allbutself (int op)
* Called with preemption disabled.
*/
static inline void
+send_IPI_mask(cpumask_t mask, int op)
+{
+ unsigned int cpu;
+
+ for_each_cpu_mask(cpu, mask) {
+ send_IPI_single(cpu, op);
+ }
+}
+
+/*
+ * Called with preemption disabled.
+ */
+static inline void
send_IPI_all (int op)
{
int i;
@@ -401,6 +414,75 @@ smp_call_function_single (int cpuid, void (*func) (void *info), void *info, int
}
EXPORT_SYMBOL(smp_call_function_single);
+/**
+ * smp_call_function_mask(): Run a function on a set of other CPUs.
+ * <mask> The set of cpus to run on. Must not include the current cpu.
+ * <func> The function to run. This must be fast and non-blocking.
+ * <info> An arbitrary pointer to pass to the function.
+ * <wait> If true, wait (atomically) until function
+ * has completed on other CPUs.
+ *
+ * Returns 0 on success, else a negative status code.
+ *
+ * If @wait is true, then returns once @func has returned; otherwise
+ * it returns just before the target cpu calls @func.
+ *
+ * You must not call this function with disabled interrupts or from a
+ * hardware interrupt handler or from a bottom half handler.
+ */
+int smp_call_function_mask(cpumask_t mask,
+ void (*func)(void *), void *info,
+ int wait)
+{
+ struct call_data_struct data;
+ cpumask_t allbutself;
+ int cpus;
+
+ spin_lock(&call_lock);
+ allbutself = cpu_online_map;
+ cpu_clear(smp_processor_id(), allbutself);
+
+ cpus_and(mask, mask, allbutself);
+ cpus = cpus_weight(mask);
+ if (!cpus) {
+ spin_unlock(&call_lock);
+ return 0;
+ }
+
+ /* Can deadlock when called with interrupts disabled */
+ WARN_ON(irqs_disabled());
+
+ data.func = func;
+ data.info = info;
+ atomic_set(&data.started, 0);
+ data.wait = wait;
+ if (wait)
+ atomic_set(&data.finished, 0);
+
+ call_data = &data;
+ mb(); /* ensure store to call_data precedes setting of IPI_CALL_FUNC*/
+
+ /* Send a message to other CPUs */
+ if (cpus_equal(mask, allbutself))
+ send_IPI_allbutself(IPI_CALL_FUNC);
+ else
+ send_IPI_mask(mask, IPI_CALL_FUNC);
+
+ /* Wait for response */
+ while (atomic_read(&data.started) != cpus)
+ cpu_relax();
+
+ if (wait)
+ while (atomic_read(&data.finished) != cpus)
+ cpu_relax();
+ call_data = NULL;
+
+ spin_unlock(&call_lock);
+ return 0;
+
+}
+EXPORT_SYMBOL(smp_call_function_mask);
+
/*
* this function sends a 'generic call function' IPI to all other CPUs
* in the system.
diff --git a/arch/ia64/kernel/smpboot.c b/arch/ia64/kernel/smpboot.c
index 32ee5979a04..16483be18c0 100644
--- a/arch/ia64/kernel/smpboot.c
+++ b/arch/ia64/kernel/smpboot.c
@@ -400,9 +400,9 @@ smp_callin (void)
/* Setup the per cpu irq handling data structures */
__setup_vector_irq(cpuid);
cpu_set(cpuid, cpu_online_map);
- unlock_ipi_calllock();
per_cpu(cpu_state, cpuid) = CPU_ONLINE;
spin_unlock(&vector_lock);
+ unlock_ipi_calllock();
smp_setup_percpu_timer();
diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c
index 17fda5293c6..48e15a51782 100644
--- a/arch/ia64/kernel/time.c
+++ b/arch/ia64/kernel/time.c
@@ -59,6 +59,84 @@ static struct clocksource clocksource_itc = {
};
static struct clocksource *itc_clocksource;
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+
+#include <linux/kernel_stat.h>
+
+extern cputime_t cycle_to_cputime(u64 cyc);
+
+/*
+ * Called from the context switch with interrupts disabled, to charge all
+ * accumulated times to the current process, and to prepare accounting on
+ * the next process.
+ */
+void ia64_account_on_switch(struct task_struct *prev, struct task_struct *next)
+{
+ struct thread_info *pi = task_thread_info(prev);
+ struct thread_info *ni = task_thread_info(next);
+ cputime_t delta_stime, delta_utime;
+ __u64 now;
+
+ now = ia64_get_itc();
+
+ delta_stime = cycle_to_cputime(pi->ac_stime + (now - pi->ac_stamp));
+ account_system_time(prev, 0, delta_stime);
+ account_system_time_scaled(prev, delta_stime);
+
+ if (pi->ac_utime) {
+ delta_utime = cycle_to_cputime(pi->ac_utime);
+ account_user_time(prev, delta_utime);
+ account_user_time_scaled(prev, delta_utime);
+ }
+
+ pi->ac_stamp = ni->ac_stamp = now;
+ ni->ac_stime = ni->ac_utime = 0;
+}
+
+/*
+ * Account time for a transition between system, hard irq or soft irq state.
+ * Note that this function is called with interrupts enabled.
+ */
+void account_system_vtime(struct task_struct *tsk)
+{
+ struct thread_info *ti = task_thread_info(tsk);
+ unsigned long flags;
+ cputime_t delta_stime;
+ __u64 now;
+
+ local_irq_save(flags);
+
+ now = ia64_get_itc();
+
+ delta_stime = cycle_to_cputime(ti->ac_stime + (now - ti->ac_stamp));
+ account_system_time(tsk, 0, delta_stime);
+ account_system_time_scaled(tsk, delta_stime);
+ ti->ac_stime = 0;
+
+ ti->ac_stamp = now;
+
+ local_irq_restore(flags);
+}
+
+/*
+ * Called from the timer interrupt handler to charge accumulated user time
+ * to the current process. Must be called with interrupts disabled.
+ */
+void account_process_tick(struct task_struct *p, int user_tick)
+{
+ struct thread_info *ti = task_thread_info(p);
+ cputime_t delta_utime;
+
+ if (ti->ac_utime) {
+ delta_utime = cycle_to_cputime(ti->ac_utime);
+ account_user_time(p, delta_utime);
+ account_user_time_scaled(p, delta_utime);
+ ti->ac_utime = 0;
+ }
+}
+
+#endif /* CONFIG_VIRT_CPU_ACCOUNTING */
+
static irqreturn_t
timer_interrupt (int irq, void *dev_id)
{
diff --git a/arch/ia64/kernel/unaligned.c b/arch/ia64/kernel/unaligned.c
index 6903361d11a..ff0e7c10faa 100644
--- a/arch/ia64/kernel/unaligned.c
+++ b/arch/ia64/kernel/unaligned.c
@@ -13,6 +13,7 @@
* 2001/08/13 Correct size of extended floats (float_fsz) from 16 to 10 bytes.
* 2001/01/17 Add support emulation of unaligned kernel accesses.
*/
+#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/tty.h>
@@ -1290,7 +1291,7 @@ within_logging_rate_limit (void)
{
static unsigned long count, last_time;
- if (jiffies - last_time > 5*HZ)
+ if (time_after(jiffies, last_time + 5 * HZ))
count = 0;
if (count < 5) {
last_time = jiffies;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-15 18:25:20 +0000