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Merge branch 'next' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Browse source 
Pull KVM fixes from Gleb Natapov.

* 'next' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: kvm_clear_guest_page(): fix empty_zero_page usage
  kvm: mmu: delay mmu audit activation
  arm/arm64: KVM: Fix hyp mappings of vmalloc regions
This commit is contained in:
Linus Torvalds 2013-11-22 09:56:07 -08:00
commit c874e6fc35
3 changed files with 32 additions and 9 deletions
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34
arch/arm/kvm/mmu.c
View file

@ -334,6 +334,17 @@ static int __create_hyp_mappings(pgd_t *pgdp,
return err;
}
static phys_addr_t kvm_kaddr_to_phys(void *kaddr)
{
if (!is_vmalloc_addr(kaddr)) {
BUG_ON(!virt_addr_valid(kaddr));
return __pa(kaddr);
} else {
return page_to_phys(vmalloc_to_page(kaddr)) +
offset_in_page(kaddr);
}
}
/**
* create_hyp_mappings - duplicate a kernel virtual address range in Hyp mode
* @from: The virtual kernel start address of the range
@ -345,16 +356,27 @@ static int __create_hyp_mappings(pgd_t *pgdp,
*/
int create_hyp_mappings(void *from, void *to)
{
unsigned long phys_addr = virt_to_phys(from);
phys_addr_t phys_addr;
unsigned long virt_addr;
unsigned long start = KERN_TO_HYP((unsigned long)from);
unsigned long end = KERN_TO_HYP((unsigned long)to);
/* Check for a valid kernel memory mapping */
if (!virt_addr_valid(from) || !virt_addr_valid(to - 1))
return -EINVAL;
start = start & PAGE_MASK;
end = PAGE_ALIGN(end);
return __create_hyp_mappings(hyp_pgd, start, end,
__phys_to_pfn(phys_addr), PAGE_HYP);
for (virt_addr = start; virt_addr < end; virt_addr += PAGE_SIZE) {
int err;
phys_addr = kvm_kaddr_to_phys(from + virt_addr - start);
err = __create_hyp_mappings(hyp_pgd, virt_addr,
virt_addr + PAGE_SIZE,
__phys_to_pfn(phys_addr),
PAGE_HYP);
if (err)
return err;
}
return 0;
}
/**

2
arch/x86/kvm/mmu_audit.c
View file

@ -296,4 +296,4 @@ static struct kernel_param_ops audit_param_ops = {
.get = param_get_bool,
};
module_param_cb(mmu_audit, &audit_param_ops, &mmu_audit, 0644);
arch_param_cb(mmu_audit, &audit_param_ops, &mmu_audit, 0644);

5
virt/kvm/kvm_main.c
View file

@ -1615,8 +1615,9 @@ EXPORT_SYMBOL_GPL(kvm_read_guest_cached);
int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len)
{
return kvm_write_guest_page(kvm, gfn, (const void *) empty_zero_page,
offset, len);
const void *zero_page = (const void *) __va(page_to_phys(ZERO_PAGE(0)));
return kvm_write_guest_page(kvm, gfn, zero_page, offset, len);
}
EXPORT_SYMBOL_GPL(kvm_clear_guest_page);