Commit b3f37707 authored by Nitin A Kamble's avatar Nitin A Kamble Committed by Avi Kivity

KVM: VMX: Handle #SS faults from real mode

Instructions with address size override prefix opcode 0x67
Cause the #SS fault with 0 error code in VM86 mode.  Forward
them to the emulator.
Signed-Off-By: default avatarNitin A Kamble <nitin.a.kamble@intel.com>
Signed-off-by: default avatarAvi Kivity <avi@qumranet.com>
parent cd2276a7
...@@ -1488,7 +1488,11 @@ static int handle_rmode_exception(struct kvm_vcpu *vcpu, ...@@ -1488,7 +1488,11 @@ static int handle_rmode_exception(struct kvm_vcpu *vcpu,
if (!vcpu->rmode.active) if (!vcpu->rmode.active)
return 0; return 0;
if (vec == GP_VECTOR && err_code == 0) /*
* Instruction with address size override prefix opcode 0x67
* Cause the #SS fault with 0 error code in VM86 mode.
*/
if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0)
if (emulate_instruction(vcpu, NULL, 0, 0) == EMULATE_DONE) if (emulate_instruction(vcpu, NULL, 0, 0) == EMULATE_DONE)
return 1; return 1;
return 0; return 0;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment