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authorLinus Torvalds <torvalds@linux-foundation.org>2013-11-22 09:56:07 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-11-22 09:56:07 -0800
commitc874e6fc3596322b0248df3158dd9d5f43a958d0 (patch)
treefd89609fe1f7a0b7c7031daee21ca9e0eaa9c1dd
parentd0f278c1dd0175093ed37ce132395dc689e6987e (diff)
parent8a3caa6d74597c2a083f7c87f866891a0b12540b (diff)
downloadlinux-c874e6fc3596322b0248df3158dd9d5f43a958d0.tar.gz
Merge branch 'next' of git://git.kernel.org/pub/scm/virt/kvm/kvm
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
-rw-r--r--arch/arm/kvm/mmu.c34
-rw-r--r--arch/x86/kvm/mmu_audit.c2
-rw-r--r--virt/kvm/kvm_main.c5
3 files changed, 32 insertions, 9 deletions
diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c
index 371958370de..580906989db 100644
--- a/arch/arm/kvm/mmu.c
+++ b/arch/arm/kvm/mmu.c
@@ -334,6 +334,17 @@ out:
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 @@ out:
*/
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;
}
/**
diff --git a/arch/x86/kvm/mmu_audit.c b/arch/x86/kvm/mmu_audit.c
index daff69e2115..1185fe7a7f4 100644
--- a/arch/x86/kvm/mmu_audit.c
+++ b/arch/x86/kvm/mmu_audit.c
@@ -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);
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 662f34c3287..a0aa84b5941 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -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);