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Diffstat (limited to 'arch/x86/xen/enlighten.c')
-rw-r--r--arch/x86/xen/enlighten.c82
1 files changed, 52 insertions, 30 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 49e5358f481..c0388220cf9 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -25,6 +25,7 @@
#include <linux/mm.h>
#include <linux/page-flags.h>
#include <linux/highmem.h>
+#include <linux/console.h>
#include <xen/interface/xen.h>
#include <xen/interface/physdev.h>
@@ -95,7 +96,7 @@ struct shared_info *HYPERVISOR_shared_info = (void *)&dummy_shared_info;
*
* 0: not available, 1: available
*/
-static int have_vcpu_info_placement = 0;
+static int have_vcpu_info_placement = 1;
static void __init xen_vcpu_setup(int cpu)
{
@@ -103,6 +104,7 @@ static void __init xen_vcpu_setup(int cpu)
int err;
struct vcpu_info *vcpup;
+ BUG_ON(HYPERVISOR_shared_info == &dummy_shared_info);
per_cpu(xen_vcpu, cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu];
if (!have_vcpu_info_placement)
@@ -153,6 +155,7 @@ static void xen_cpuid(unsigned int *ax, unsigned int *bx,
if (*ax == 1)
maskedx = ~((1 << X86_FEATURE_APIC) | /* disable APIC */
(1 << X86_FEATURE_ACPI) | /* disable ACPI */
+ (1 << X86_FEATURE_SEP) | /* disable SEP */
(1 << X86_FEATURE_ACC)); /* thermal monitoring */
asm(XEN_EMULATE_PREFIX "cpuid"
@@ -665,10 +668,10 @@ static void xen_release_pt_init(u32 pfn)
make_lowmem_page_readwrite(__va(PFN_PHYS(pfn)));
}
-static void pin_pagetable_pfn(unsigned level, unsigned long pfn)
+static void pin_pagetable_pfn(unsigned cmd, unsigned long pfn)
{
struct mmuext_op op;
- op.cmd = level;
+ op.cmd = cmd;
op.arg1.mfn = pfn_to_mfn(pfn);
if (HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF))
BUG();
@@ -685,7 +688,8 @@ static void xen_alloc_ptpage(struct mm_struct *mm, u32 pfn, unsigned level)
if (!PageHighMem(page)) {
make_lowmem_page_readonly(__va(PFN_PHYS(pfn)));
- pin_pagetable_pfn(level, pfn);
+ if (level == PT_PTE)
+ pin_pagetable_pfn(MMUEXT_PIN_L1_TABLE, pfn);
} else
/* make sure there are no stray mappings of
this page */
@@ -695,27 +699,39 @@ static void xen_alloc_ptpage(struct mm_struct *mm, u32 pfn, unsigned level)
static void xen_alloc_pt(struct mm_struct *mm, u32 pfn)
{
- xen_alloc_ptpage(mm, pfn, MMUEXT_PIN_L1_TABLE);
+ xen_alloc_ptpage(mm, pfn, PT_PTE);
}
static void xen_alloc_pd(struct mm_struct *mm, u32 pfn)
{
- xen_alloc_ptpage(mm, pfn, MMUEXT_PIN_L2_TABLE);
+ xen_alloc_ptpage(mm, pfn, PT_PMD);
}
/* This should never happen until we're OK to use struct page */
-static void xen_release_pt(u32 pfn)
+static void xen_release_ptpage(u32 pfn, unsigned level)
{
struct page *page = pfn_to_page(pfn);
if (PagePinned(page)) {
if (!PageHighMem(page)) {
- pin_pagetable_pfn(MMUEXT_UNPIN_TABLE, pfn);
+ if (level == PT_PTE)
+ pin_pagetable_pfn(MMUEXT_UNPIN_TABLE, pfn);
make_lowmem_page_readwrite(__va(PFN_PHYS(pfn)));
}
+ ClearPagePinned(page);
}
}
+static void xen_release_pt(u32 pfn)
+{
+ xen_release_ptpage(pfn, PT_PTE);
+}
+
+static void xen_release_pd(u32 pfn)
+{
+ xen_release_ptpage(pfn, PT_PMD);
+}
+
#ifdef CONFIG_HIGHPTE
static void *xen_kmap_atomic_pte(struct page *page, enum km_type type)
{
@@ -804,33 +820,43 @@ static __init void xen_pagetable_setup_start(pgd_t *base)
PFN_DOWN(__pa(xen_start_info->pt_base)));
}
-static __init void xen_pagetable_setup_done(pgd_t *base)
+static __init void setup_shared_info(void)
{
- /* This will work as long as patching hasn't happened yet
- (which it hasn't) */
- pv_mmu_ops.alloc_pt = xen_alloc_pt;
- pv_mmu_ops.alloc_pd = xen_alloc_pd;
- pv_mmu_ops.release_pt = xen_release_pt;
- pv_mmu_ops.release_pd = xen_release_pt;
- pv_mmu_ops.set_pte = xen_set_pte;
-
if (!xen_feature(XENFEAT_auto_translated_physmap)) {
+ unsigned long addr = fix_to_virt(FIX_PARAVIRT_BOOTMAP);
+
/*
* Create a mapping for the shared info page.
* Should be set_fixmap(), but shared_info is a machine
* address with no corresponding pseudo-phys address.
*/
- set_pte_mfn(fix_to_virt(FIX_PARAVIRT_BOOTMAP),
+ set_pte_mfn(addr,
PFN_DOWN(xen_start_info->shared_info),
PAGE_KERNEL);
- HYPERVISOR_shared_info =
- (struct shared_info *)fix_to_virt(FIX_PARAVIRT_BOOTMAP);
-
+ HYPERVISOR_shared_info = (struct shared_info *)addr;
} else
HYPERVISOR_shared_info =
(struct shared_info *)__va(xen_start_info->shared_info);
+#ifndef CONFIG_SMP
+ /* In UP this is as good a place as any to set up shared info */
+ xen_setup_vcpu_info_placement();
+#endif
+}
+
+static __init void xen_pagetable_setup_done(pgd_t *base)
+{
+ /* This will work as long as patching hasn't happened yet
+ (which it hasn't) */
+ pv_mmu_ops.alloc_pt = xen_alloc_pt;
+ pv_mmu_ops.alloc_pd = xen_alloc_pd;
+ pv_mmu_ops.release_pt = xen_release_pt;
+ pv_mmu_ops.release_pd = xen_release_pd;
+ pv_mmu_ops.set_pte = xen_set_pte;
+
+ setup_shared_info();
+
/* Actually pin the pagetable down, but we can't set PG_pinned
yet because the page structures don't exist yet. */
{
@@ -864,7 +890,6 @@ void __init xen_setup_vcpu_info_placement(void)
pv_irq_ops.irq_disable = xen_irq_disable_direct;
pv_irq_ops.irq_enable = xen_irq_enable_direct;
pv_mmu_ops.read_cr2 = xen_read_cr2_direct;
- pv_cpu_ops.iret = xen_iret_direct;
}
}
@@ -968,7 +993,7 @@ static const struct pv_cpu_ops xen_cpu_ops __initdata = {
.read_tsc = native_read_tsc,
.read_pmc = native_read_pmc,
- .iret = (void *)&hypercall_page[__HYPERVISOR_iret],
+ .iret = xen_iret,
.irq_enable_syscall_ret = NULL, /* never called */
.load_tr_desc = paravirt_nop,
@@ -1181,15 +1206,9 @@ asmlinkage void __init xen_start_kernel(void)
x86_write_percpu(xen_cr3, __pa(pgd));
x86_write_percpu(xen_current_cr3, __pa(pgd));
-#ifdef CONFIG_SMP
/* Don't do the full vcpu_info placement stuff until we have a
- possible map. */
+ possible map and a non-dummy shared_info. */
per_cpu(xen_vcpu, 0) = &HYPERVISOR_shared_info->vcpu_info[0];
-#else
- /* May as well do it now, since there's no good time to call
- it later on UP. */
- xen_setup_vcpu_info_placement();
-#endif
pv_info.kernel_rpl = 1;
if (xen_feature(XENFEAT_supervisor_mode_kernel))
@@ -1209,6 +1228,9 @@ asmlinkage void __init xen_start_kernel(void)
? __pa(xen_start_info->mod_start) : 0;
boot_params.hdr.ramdisk_size = xen_start_info->mod_len;
+ if (!is_initial_xendomain())
+ add_preferred_console("hvc", 0, NULL);
+
/* Start the world */
start_kernel();
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-25 23:49:53 +0000