Commit 160ce1f1 authored by Mohammed Gamal's avatar Mohammed Gamal Committed by Avi Kivity
Browse files

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: default avatarMohammed Gamal <m.gamal005@gmail.com>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent d3ad6243

arch/x86/include/asm/kvm_emulate.h

+1 −0
Original line number Diff line number Diff line
@@ -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);

arch/x86/kvm/x86.c

+6 −0
Original line number Diff line number Diff line
@@ -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,

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