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KVM: x86 emulator: Allow accessing IDT via emulator ops 

The patch adds a new member get_idt() to x86_emulate_ops.
It also adds a function to get the idt in order to be used by the emulator.

This is needed for real mode interrupt injection and the emulation of int
instructions.

Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
hifive-unleashed-5.1
Mohammed Gamal 2010-08-04 05:44:24 +03:00 committed by Avi Kivity
parent d3ad624329
commit 160ce1f1a8
2 changed files with 7 additions and 0 deletions
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1
arch/x86/include/asm/kvm_emulate.h
View File

@ -139,6 +139,7 @@ struct x86_emulate_ops {
void (*set_segment_selector)(u16 sel, int seg, struct kvm_vcpu *vcpu);
unsigned long (*get_cached_segment_base)(int seg, struct kvm_vcpu *vcpu);
void (*get_gdt)(struct desc_ptr *dt, struct kvm_vcpu *vcpu);
void (*get_idt)(struct desc_ptr *dt, struct kvm_vcpu *vcpu);
ulong (*get_cr)(int cr, struct kvm_vcpu *vcpu);
int (*set_cr)(int cr, ulong val, struct kvm_vcpu *vcpu);
int (*cpl)(struct kvm_vcpu *vcpu);

6
arch/x86/kvm/x86.c
View File

@ -3790,6 +3790,11 @@ static void emulator_get_gdt(struct desc_ptr *dt, struct kvm_vcpu *vcpu)
kvm_x86_ops->get_gdt(vcpu, dt);
}
static void emulator_get_idt(struct desc_ptr *dt, struct kvm_vcpu *vcpu)
{
kvm_x86_ops->get_idt(vcpu, dt);
}
static unsigned long emulator_get_cached_segment_base(int seg,
struct kvm_vcpu *vcpu)
{
@ -3883,6 +3888,7 @@ static struct x86_emulate_ops emulate_ops = {
.set_segment_selector = emulator_set_segment_selector,
.get_cached_segment_base = emulator_get_cached_segment_base,
.get_gdt = emulator_get_gdt,
.get_idt = emulator_get_idt,
.get_cr = emulator_get_cr,
.set_cr = emulator_set_cr,
.cpl = emulator_get_cpl,