diff options
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/asm-offsets.c | 34 | ||||
| -rw-r--r-- | arch/arm64/kernel/debug-monitors.c | 72 | ||||
| -rw-r--r-- | arch/arm64/kernel/entry.S | 2 | ||||
| -rw-r--r-- | arch/arm64/kernel/hw_breakpoint.c | 4 | ||||
| -rw-r--r-- | arch/arm64/kernel/process.c | 4 | ||||
| -rw-r--r-- | arch/arm64/kernel/ptrace.c | 59 | ||||
| -rw-r--r-- | arch/arm64/kernel/smp.c | 23 | ||||
| -rw-r--r-- | arch/arm64/kernel/time.c | 6 | ||||
| -rw-r--r-- | arch/arm64/kernel/traps.c | 5 | ||||
| -rw-r--r-- | arch/arm64/kernel/vmlinux.lds.S | 30 |
10 files changed, 141 insertions, 98 deletions
diff --git a/arch/arm64/kernel/asm-offsets.c b/arch/arm64/kernel/asm-offsets.c index a2a4d810bea..666e231d410 100644 --- a/arch/arm64/kernel/asm-offsets.c +++ b/arch/arm64/kernel/asm-offsets.c @@ -21,6 +21,7 @@ #include <linux/sched.h> #include <linux/mm.h> #include <linux/dma-mapping.h> +#include <linux/kvm_host.h> #include <asm/thread_info.h> #include <asm/memory.h> #include <asm/cputable.h> @@ -104,5 +105,38 @@ int main(void) BLANK(); DEFINE(TZ_MINWEST, offsetof(struct timezone, tz_minuteswest)); DEFINE(TZ_DSTTIME, offsetof(struct timezone, tz_dsttime)); + BLANK(); +#ifdef CONFIG_KVM_ARM_HOST + DEFINE(VCPU_CONTEXT, offsetof(struct kvm_vcpu, arch.ctxt)); + DEFINE(CPU_GP_REGS, offsetof(struct kvm_cpu_context, gp_regs)); + DEFINE(CPU_USER_PT_REGS, offsetof(struct kvm_regs, regs)); + DEFINE(CPU_FP_REGS, offsetof(struct kvm_regs, fp_regs)); + DEFINE(CPU_SP_EL1, offsetof(struct kvm_regs, sp_el1)); + DEFINE(CPU_ELR_EL1, offsetof(struct kvm_regs, elr_el1)); + DEFINE(CPU_SPSR, offsetof(struct kvm_regs, spsr)); + DEFINE(CPU_SYSREGS, offsetof(struct kvm_cpu_context, sys_regs)); + DEFINE(VCPU_ESR_EL2, offsetof(struct kvm_vcpu, arch.fault.esr_el2)); + DEFINE(VCPU_FAR_EL2, offsetof(struct kvm_vcpu, arch.fault.far_el2)); + DEFINE(VCPU_HPFAR_EL2, offsetof(struct kvm_vcpu, arch.fault.hpfar_el2)); + DEFINE(VCPU_HCR_EL2, offsetof(struct kvm_vcpu, arch.hcr_el2)); + DEFINE(VCPU_IRQ_LINES, offsetof(struct kvm_vcpu, arch.irq_lines)); + DEFINE(VCPU_HOST_CONTEXT, offsetof(struct kvm_vcpu, arch.host_cpu_context)); + DEFINE(VCPU_TIMER_CNTV_CTL, offsetof(struct kvm_vcpu, arch.timer_cpu.cntv_ctl)); + DEFINE(VCPU_TIMER_CNTV_CVAL, offsetof(struct kvm_vcpu, arch.timer_cpu.cntv_cval)); + DEFINE(KVM_TIMER_CNTVOFF, offsetof(struct kvm, arch.timer.cntvoff)); + DEFINE(KVM_TIMER_ENABLED, offsetof(struct kvm, arch.timer.enabled)); + DEFINE(VCPU_KVM, offsetof(struct kvm_vcpu, kvm)); + DEFINE(VCPU_VGIC_CPU, offsetof(struct kvm_vcpu, arch.vgic_cpu)); + DEFINE(VGIC_CPU_HCR, offsetof(struct vgic_cpu, vgic_hcr)); + DEFINE(VGIC_CPU_VMCR, offsetof(struct vgic_cpu, vgic_vmcr)); + DEFINE(VGIC_CPU_MISR, offsetof(struct vgic_cpu, vgic_misr)); + DEFINE(VGIC_CPU_EISR, offsetof(struct vgic_cpu, vgic_eisr)); + DEFINE(VGIC_CPU_ELRSR, offsetof(struct vgic_cpu, vgic_elrsr)); + DEFINE(VGIC_CPU_APR, offsetof(struct vgic_cpu, vgic_apr)); + DEFINE(VGIC_CPU_LR, offsetof(struct vgic_cpu, vgic_lr)); + DEFINE(VGIC_CPU_NR_LR, offsetof(struct vgic_cpu, nr_lr)); + DEFINE(KVM_VTTBR, offsetof(struct kvm, arch.vttbr)); + DEFINE(KVM_VGIC_VCTRL, offsetof(struct kvm, arch.vgic.vctrl_base)); +#endif return 0; } diff --git a/arch/arm64/kernel/debug-monitors.c b/arch/arm64/kernel/debug-monitors.c index f4726dc054b..cbfacf7fb43 100644 --- a/arch/arm64/kernel/debug-monitors.c +++ b/arch/arm64/kernel/debug-monitors.c @@ -24,6 +24,7 @@ #include <linux/init.h> #include <linux/ptrace.h> #include <linux/stat.h> +#include <linux/uaccess.h> #include <asm/debug-monitors.h> #include <asm/local.h> @@ -140,7 +141,7 @@ static void clear_os_lock(void *unused) isb(); } -static int __cpuinit os_lock_notify(struct notifier_block *self, +static int os_lock_notify(struct notifier_block *self, unsigned long action, void *data) { int cpu = (unsigned long)data; @@ -149,11 +150,11 @@ static int __cpuinit os_lock_notify(struct notifier_block *self, return NOTIFY_OK; } -static struct notifier_block __cpuinitdata os_lock_nb = { +static struct notifier_block os_lock_nb = { .notifier_call = os_lock_notify, }; -static int __cpuinit debug_monitors_init(void) +static int debug_monitors_init(void) { /* Clear the OS lock. */ smp_call_function(clear_os_lock, NULL, 1); @@ -226,13 +227,74 @@ static int single_step_handler(unsigned long addr, unsigned int esr, return 0; } -static int __init single_step_init(void) +static int brk_handler(unsigned long addr, unsigned int esr, + struct pt_regs *regs) +{ + siginfo_t info; + + if (!user_mode(regs)) + return -EFAULT; + + info = (siginfo_t) { + .si_signo = SIGTRAP, + .si_errno = 0, + .si_code = TRAP_BRKPT, + .si_addr = (void __user *)instruction_pointer(regs), + }; + + force_sig_info(SIGTRAP, &info, current); + return 0; +} + +int aarch32_break_handler(struct pt_regs *regs) +{ + siginfo_t info; + unsigned int instr; + bool bp = false; + void __user *pc = (void __user *)instruction_pointer(regs); + + if (!compat_user_mode(regs)) + return -EFAULT; + + if (compat_thumb_mode(regs)) { + /* get 16-bit Thumb instruction */ + get_user(instr, (u16 __user *)pc); + if (instr == AARCH32_BREAK_THUMB2_LO) { + /* get second half of 32-bit Thumb-2 instruction */ + get_user(instr, (u16 __user *)(pc + 2)); + bp = instr == AARCH32_BREAK_THUMB2_HI; + } else { + bp = instr == AARCH32_BREAK_THUMB; + } + } else { + /* 32-bit ARM instruction */ + get_user(instr, (u32 __user *)pc); + bp = (instr & ~0xf0000000) == AARCH32_BREAK_ARM; + } + + if (!bp) + return -EFAULT; + + info = (siginfo_t) { + .si_signo = SIGTRAP, + .si_errno = 0, + .si_code = TRAP_BRKPT, + .si_addr = pc, + }; + + force_sig_info(SIGTRAP, &info, current); + return 0; +} + +static int __init debug_traps_init(void) { hook_debug_fault_code(DBG_ESR_EVT_HWSS, single_step_handler, SIGTRAP, TRAP_HWBKPT, "single-step handler"); + hook_debug_fault_code(DBG_ESR_EVT_BRK, brk_handler, SIGTRAP, + TRAP_BRKPT, "ptrace BRK handler"); return 0; } -arch_initcall(single_step_init); +arch_initcall(debug_traps_init); /* Re-enable single step for syscall restarting. */ void user_rewind_single_step(struct task_struct *task) diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index 1d1314280a0..6ad781b21c0 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -121,7 +121,7 @@ .macro get_thread_info, rd mov \rd, sp - and \rd, \rd, #~((1 << 13) - 1) // top of 8K stack + and \rd, \rd, #~(THREAD_SIZE - 1) // top of stack .endm /* diff --git a/arch/arm64/kernel/hw_breakpoint.c b/arch/arm64/kernel/hw_breakpoint.c index 5ab825c59db..329218ca9ff 100644 --- a/arch/arm64/kernel/hw_breakpoint.c +++ b/arch/arm64/kernel/hw_breakpoint.c @@ -821,7 +821,7 @@ static void reset_ctrl_regs(void *unused) } } -static int __cpuinit hw_breakpoint_reset_notify(struct notifier_block *self, +static int hw_breakpoint_reset_notify(struct notifier_block *self, unsigned long action, void *hcpu) { @@ -831,7 +831,7 @@ static int __cpuinit hw_breakpoint_reset_notify(struct notifier_block *self, return NOTIFY_OK; } -static struct notifier_block __cpuinitdata hw_breakpoint_reset_nb = { +static struct notifier_block hw_breakpoint_reset_nb = { .notifier_call = hw_breakpoint_reset_notify, }; diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index 46f02c3b501..57fb55c44c9 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -81,7 +81,7 @@ void soft_restart(unsigned long addr) void (*pm_power_off)(void); EXPORT_SYMBOL_GPL(pm_power_off); -void (*arm_pm_restart)(char str, const char *cmd); +void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd); EXPORT_SYMBOL_GPL(arm_pm_restart); void arch_cpu_idle_prepare(void) @@ -132,7 +132,7 @@ void machine_restart(char *cmd) /* Now call the architecture specific reboot code. */ if (arm_pm_restart) - arm_pm_restart('h', cmd); + arm_pm_restart(reboot_mode, cmd); /* * Whoops - the architecture was unable to reboot. diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c index 6e1e77f1831..fecdbf7de82 100644 --- a/arch/arm64/kernel/ptrace.c +++ b/arch/arm64/kernel/ptrace.c @@ -53,28 +53,6 @@ void ptrace_disable(struct task_struct *child) { } -/* - * Handle hitting a breakpoint. - */ -static int ptrace_break(struct pt_regs *regs) -{ - siginfo_t info = { - .si_signo = SIGTRAP, - .si_errno = 0, - .si_code = TRAP_BRKPT, - .si_addr = (void __user *)instruction_pointer(regs), - }; - - force_sig_info(SIGTRAP, &info, current); - return 0; -} - -static int arm64_break_trap(unsigned long addr, unsigned int esr, - struct pt_regs *regs) -{ - return ptrace_break(regs); -} - #ifdef CONFIG_HAVE_HW_BREAKPOINT /* * Handle hitting a HW-breakpoint. @@ -817,33 +795,6 @@ static const struct user_regset_view user_aarch32_view = { .regsets = aarch32_regsets, .n = ARRAY_SIZE(aarch32_regsets) }; -int aarch32_break_trap(struct pt_regs *regs) -{ - unsigned int instr; - bool bp = false; - void __user *pc = (void __user *)instruction_pointer(regs); - - if (compat_thumb_mode(regs)) { - /* get 16-bit Thumb instruction */ - get_user(instr, (u16 __user *)pc); - if (instr == AARCH32_BREAK_THUMB2_LO) { - /* get second half of 32-bit Thumb-2 instruction */ - get_user(instr, (u16 __user *)(pc + 2)); - bp = instr == AARCH32_BREAK_THUMB2_HI; - } else { - bp = instr == AARCH32_BREAK_THUMB; - } - } else { - /* 32-bit ARM instruction */ - get_user(instr, (u32 __user *)pc); - bp = (instr & ~0xf0000000) == AARCH32_BREAK_ARM; - } - - if (bp) - return ptrace_break(regs); - return 1; -} - static int compat_ptrace_read_user(struct task_struct *tsk, compat_ulong_t off, compat_ulong_t __user *ret) { @@ -1111,16 +1062,6 @@ long arch_ptrace(struct task_struct *child, long request, return ptrace_request(child, request, addr, data); } - -static int __init ptrace_break_init(void) -{ - hook_debug_fault_code(DBG_ESR_EVT_BRK, arm64_break_trap, SIGTRAP, - TRAP_BRKPT, "ptrace BRK handler"); - return 0; -} -core_initcall(ptrace_break_init); - - asmlinkage int syscall_trace(int dir, struct pt_regs *regs) { unsigned long saved_reg; diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 5d54e3717bf..fee5cce8345 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -71,7 +71,7 @@ static DEFINE_RAW_SPINLOCK(boot_lock); * in coherency or not. This is necessary for the hotplug code to work * reliably. */ -static void __cpuinit write_pen_release(u64 val) +static void write_pen_release(u64 val) { void *start = (void *)&secondary_holding_pen_release; unsigned long size = sizeof(secondary_holding_pen_release); @@ -84,7 +84,7 @@ static void __cpuinit write_pen_release(u64 val) * Boot a secondary CPU, and assign it the specified idle task. * This also gives us the initial stack to use for this CPU. */ -static int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle) +static int boot_secondary(unsigned int cpu, struct task_struct *idle) { unsigned long timeout; @@ -122,7 +122,7 @@ static int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle) static DECLARE_COMPLETION(cpu_running); -int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *idle) +int __cpu_up(unsigned int cpu, struct task_struct *idle) { int ret; @@ -162,7 +162,7 @@ int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *idle) * This is the secondary CPU boot entry. We're using this CPUs * idle thread stack, but a set of temporary page tables. */ -asmlinkage void __cpuinit secondary_start_kernel(void) +asmlinkage void secondary_start_kernel(void) { struct mm_struct *mm = &init_mm; unsigned int cpu = smp_processor_id(); @@ -200,13 +200,6 @@ asmlinkage void __cpuinit secondary_start_kernel(void) raw_spin_unlock(&boot_lock); /* - * Enable local interrupts. - */ - notify_cpu_starting(cpu); - local_irq_enable(); - local_fiq_enable(); - - /* * OK, now it's safe to let the boot CPU continue. Wait for * the CPU migration code to notice that the CPU is online * before we continue. @@ -215,6 +208,14 @@ asmlinkage void __cpuinit secondary_start_kernel(void) complete(&cpu_running); /* + * Enable GIC and timers. + */ + notify_cpu_starting(cpu); + + local_irq_enable(); + local_fiq_enable(); + + /* * OK, it's off to the idle thread for us */ cpu_startup_entry(CPUHP_ONLINE); diff --git a/arch/arm64/kernel/time.c b/arch/arm64/kernel/time.c index a551f88ae2c..03dc3718eb1 100644 --- a/arch/arm64/kernel/time.c +++ b/arch/arm64/kernel/time.c @@ -68,12 +68,6 @@ unsigned long long notrace sched_clock(void) return arch_timer_read_counter() * sched_clock_mult; } -int read_current_timer(unsigned long *timer_value) -{ - *timer_value = arch_timer_read_counter(); - return 0; -} - void __init time_init(void) { u32 arch_timer_rate; diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index f30852d2859..7ffadddb645 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -32,6 +32,7 @@ #include <linux/syscalls.h> #include <asm/atomic.h> +#include <asm/debug-monitors.h> #include <asm/traps.h> #include <asm/stacktrace.h> #include <asm/exception.h> @@ -261,11 +262,9 @@ asmlinkage void __exception do_undefinstr(struct pt_regs *regs) siginfo_t info; void __user *pc = (void __user *)instruction_pointer(regs); -#ifdef CONFIG_COMPAT /* check for AArch32 breakpoint instructions */ - if (compat_user_mode(regs) && aarch32_break_trap(regs) == 0) + if (!aarch32_break_handler(regs)) return; -#endif if (show_unhandled_signals && unhandled_signal(current, SIGILL) && printk_ratelimit()) { diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S index 3fae2be8b01..f5e55747242 100644 --- a/arch/arm64/kernel/vmlinux.lds.S +++ b/arch/arm64/kernel/vmlinux.lds.S @@ -17,6 +17,19 @@ ENTRY(stext) jiffies = jiffies_64; +#define HYPERVISOR_TEXT \ + /* \ + * Force the alignment to be compatible with \ + * the vectors requirements \ + */ \ + . = ALIGN(2048); \ + VMLINUX_SYMBOL(__hyp_idmap_text_start) = .; \ + *(.hyp.idmap.text) \ + VMLINUX_SYMBOL(__hyp_idmap_text_end) = .; \ + VMLINUX_SYMBOL(__hyp_text_start) = .; \ + *(.hyp.text) \ + VMLINUX_SYMBOL(__hyp_text_end) = .; + SECTIONS { /* @@ -49,6 +62,7 @@ SECTIONS TEXT_TEXT SCHED_TEXT LOCK_TEXT + HYPERVISOR_TEXT *(.fixup) *(.gnu.warning) . = ALIGN(16); @@ -56,7 +70,7 @@ SECTIONS } RO_DATA(PAGE_SIZE) - + EXCEPTION_TABLE(8) _etext = .; /* End of text and rodata section */ . = ALIGN(PAGE_SIZE); @@ -99,14 +113,6 @@ SECTIONS READ_MOSTLY_DATA(64) /* - * The exception fixup table (might need resorting at runtime) - */ - . = ALIGN(32); - __start___ex_table = .; - *(__ex_table) - __stop___ex_table = .; - - /* * and the usual data section */ DATA_DATA @@ -124,3 +130,9 @@ SECTIONS STABS_DEBUG .comment 0 : { *(.comment) } } + +/* + * The HYP init code can't be more than a page long. + */ +ASSERT(((__hyp_idmap_text_start + PAGE_SIZE) > __hyp_idmap_text_end), + "HYP init code too big") |