Re: [PATCH non-atomic-injection] KVM: Initialize rip for real mode interrupt injection

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On Wed, Aug 18, 2010 at 5:11 PM, Avi Kivity <avi@xxxxxxxxxx> wrote:
>  On 08/18/2010 05:09 PM, Avi Kivity wrote:
>>
>>  On 08/18/2010 03:46 PM, Mohammed Gamal wrote:
>>>
>>> On Wed, Aug 18, 2010 at 10:36 AM, Avi Kivity<avi@xxxxxxxxxx>  wrote:
>>>>
>>>> Signed-off-by: Avi Kivity<avi@xxxxxxxxxx>
>>>> ---
>>>>  arch/x86/kvm/x86.c |    1 +
>>>>  1 files changed, 1 insertions(+), 0 deletions(-)
>>>>
>>>> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
>>>> index f6a31a1..e2b0e36 100644
>>>> --- a/arch/x86/kvm/x86.c
>>>> +++ b/arch/x86/kvm/x86.c
>>>> @@ -3967,6 +3967,7 @@ int kvm_inject_realmode_interrupt(struct kvm_vcpu
>>>> *vcpu, int irq)
>>>>
>>>>        vcpu->arch.emulate_ctxt.decode.op_bytes = 2;
>>>>        vcpu->arch.emulate_ctxt.decode.ad_bytes = 2;
>>>> +       vcpu->arch.emulate_ctxt.decode.eip = kvm_rip_read(vcpu);
>>>
>>> I think it'd make more sense to make
>>> vcpu->arch.emulate_ctxt.decode.eip =  vcpu->arch.emulate_ctxt.eip, as
>>> we already initlialize the emulation context eip. It's not going to
>>> make any real difference, but it's more readable this way I suppose,
>>> and is symmetric to the assignment of the emulation context eip value
>>> after the call to emulate_int_real()
>>
>> Right, patch updated.
>>
>
> btw, with the other fixes in non-atomic-injection the bios is able to boot
>  up to the "no bootable device" message.
Did u try running it with any actual guests?

>
> --
> I have a truly marvellous patch that fixes the bug which this
> signature is too narrow to contain.
>
>
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