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KVM: VMX: Handle #SS faults from real mode

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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: Nitin A Kamble <nitin.a.kamble@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Nitin A Kamble
2007-05-17 15:50:34 +03:00
committed by Avi Kivity
parent cd2276a795
commit b3f37707b0
1 changed files with 5 additions and 1 deletions
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6
drivers/kvm/vmx.c
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@@ -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;