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| author | KarimAllah Ahmed <karahmed@amazon.de> | 2019-01-31 21:24:32 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-04-30 21:32:38 +0200 |
| commit | 3d5f6beb74a00bcc308612ee007e3e0c6126c397 (patch) | |
| tree | 82713e2f555bf0888d81be894a77a2121f5c4d75 /arch/x86/kvm/vmx | |
| parent | X86/nVMX: handle_vmon: Read 4 bytes from guest memory (diff) | |
| download | linux-3d5f6beb74a00bcc308612ee007e3e0c6126c397.tar.xz linux-3d5f6beb74a00bcc308612ee007e3e0c6126c397.zip | |
X86/nVMX: Update the PML table without mapping and unmapping the page
Update the PML table without mapping and unmapping the page. This also
avoids using kvm_vcpu_gpa_to_page(..) which assumes that there is a "struct
page" for guest memory.
As a side-effect of using kvm_write_guest_page the page is also properly
marked as dirty.
Signed-off-by: KarimAllah Ahmed <karahmed@amazon.de>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx')
| -rw-r--r-- | arch/x86/kvm/vmx/vmx.c | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 835f642e70e2..afe45a28020c 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -7116,9 +7116,7 @@ static int vmx_write_pml_buffer(struct kvm_vcpu *vcpu) { struct vmcs12 *vmcs12; struct vcpu_vmx *vmx = to_vmx(vcpu); - gpa_t gpa; - struct page *page = NULL; - u64 *pml_address; + gpa_t gpa, dst; if (is_guest_mode(vcpu)) { WARN_ON_ONCE(vmx->nested.pml_full); @@ -7138,15 +7136,13 @@ static int vmx_write_pml_buffer(struct kvm_vcpu *vcpu) } gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS) & ~0xFFFull; + dst = vmcs12->pml_address + sizeof(u64) * vmcs12->guest_pml_index; - page = kvm_vcpu_gpa_to_page(vcpu, vmcs12->pml_address); - if (is_error_page(page)) + if (kvm_write_guest_page(vcpu->kvm, gpa_to_gfn(dst), &gpa, + offset_in_page(dst), sizeof(gpa))) return 0; - pml_address = kmap(page); - pml_address[vmcs12->guest_pml_index--] = gpa; - kunmap(page); - kvm_release_page_clean(page); + vmcs12->guest_pml_index--; } return 0; |