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| author | David Matlack <dmatlack@google.com> | 2015-12-30 17:26:17 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-01-07 11:03:47 +0100 |
| commit | 0af2593b2ad125880a78d1bba966e450cc2330df (patch) | |
| tree | 2b2891addc1821bfd7614660b319da152c1fcc76 /arch/x86 | |
| parent | Merge tag 'kvm-arm-for-4.5-1' of git://git.kernel.org/pub/scm/linux/kernel/gi... (diff) | |
| download | linux-0af2593b2ad125880a78d1bba966e450cc2330df.tar.xz linux-0af2593b2ad125880a78d1bba966e450cc2330df.zip | |
kvm: x86: fix comment about {mmu,nested_mmu}.gva_to_gpa
The comment had the meaning of mmu.gva_to_gpa and nested_mmu.gva_to_gpa
swapped. Fix that, and also add some details describing how each translation
works.
Signed-off-by: David Matlack <dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kvm/mmu.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 7f5a82bb61e9..420a5ca3c0ee 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -4024,10 +4024,12 @@ static void init_kvm_nested_mmu(struct kvm_vcpu *vcpu) g_context->inject_page_fault = kvm_inject_page_fault; /* - * Note that arch.mmu.gva_to_gpa translates l2_gva to l1_gpa. The - * translation of l2_gpa to l1_gpa addresses is done using the - * arch.nested_mmu.gva_to_gpa function. Basically the gva_to_gpa - * functions between mmu and nested_mmu are swapped. + * Note that arch.mmu.gva_to_gpa translates l2_gpa to l1_gpa using + * L1's nested page tables (e.g. EPT12). The nested translation + * of l2_gva to l1_gpa is done by arch.nested_mmu.gva_to_gpa using + * L2's page tables as the first level of translation and L1's + * nested page tables as the second level of translation. Basically + * the gva_to_gpa functions between mmu and nested_mmu are swapped. */ if (!is_paging(vcpu)) { g_context->nx = false; |