diff options
| author | Mikhail Ershov <Mike.Ershov@gmail.com> | 2009-08-19 14:08:07 +0400 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2009-09-10 10:46:52 +0300 |
| commit | d9048d3278ed4d395e63899257c3fa377693968b (patch) | |
| tree | 8a1b95d5bb939690ab03513efcc6cd4bff9ab923 /arch/x86/kvm/x86.c | |
| parent | 7bdb588827265bf42dd420e95d34275c83603568 (diff) | |
| download | lwn-d9048d3278ed4d395e63899257c3fa377693968b.tar.gz lwn-d9048d3278ed4d395e63899257c3fa377693968b.zip | |
KVM: Use kvm_{read,write}_guest_virt() to read and write segment descriptors
Segment descriptors tables can be placed on two non-contiguous pages.
This patch makes reading segment descriptors by linear address.
Signed-off-by: Mikhail Ershov <Mike.Ershov@gmail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index c0e942747b0f..59a8ba4d56bd 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -4021,7 +4021,6 @@ static void get_segment_descriptor_dtable(struct kvm_vcpu *vcpu, static int load_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, struct desc_struct *seg_desc) { - gpa_t gpa; struct descriptor_table dtable; u16 index = selector >> 3; @@ -4031,16 +4030,13 @@ static int load_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, kvm_queue_exception_e(vcpu, GP_VECTOR, selector & 0xfffc); return 1; } - gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, dtable.base); - gpa += index * 8; - return kvm_read_guest(vcpu->kvm, gpa, seg_desc, 8); + return kvm_read_guest_virt(dtable.base + index*8, seg_desc, sizeof(*seg_desc), vcpu); } /* allowed just for 8 bytes segments */ static int save_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, struct desc_struct *seg_desc) { - gpa_t gpa; struct descriptor_table dtable; u16 index = selector >> 3; @@ -4048,9 +4044,7 @@ static int save_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, if (dtable.limit < index * 8 + 7) return 1; - gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, dtable.base); - gpa += index * 8; - return kvm_write_guest(vcpu->kvm, gpa, seg_desc, 8); + return kvm_write_guest_virt(dtable.base + index*8, seg_desc, sizeof(*seg_desc), vcpu); } static u32 get_tss_base_addr(struct kvm_vcpu *vcpu, |