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Groups > linux.kernel > #1442803
| From | Radim Krčmář <rkrcmar@redhat.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [RFC PATCH 3/4] KVM: x86: add support for emulating UMIP |
| Date | 2016-07-13 22:10 +0200 |
| Message-ID | <rUyDM-7RI-19@gated-at.bofh.it> (permalink) |
| References | <rUbxw-Oh-21@gated-at.bofh.it> <rUbxw-Oh-19@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
2016-07-12 21:20+0200, Paolo Bonzini:
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
> diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
> @@ -3738,6 +3747,10 @@ static int em_lidt(struct x86_emulate_ctxt *ctxt)
>
> static int em_smsw(struct x86_emulate_ctxt *ctxt)
> {
> + if ((ctxt->ops->get_cr(ctxt, 4) & X86_CR4_UMIP) &&
> + ctxt->ops->cpl(ctxt) > 0)
UMIP should #GP(0) in virtual-8086 mode too (for SMSW, SIDT, and SGDT),
but cpl() returns 0 in vm86.
> + return emulate_gp(ctxt, 0);
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[RFC PATCH 3/4] KVM: x86: add support for emulating UMIP Paolo Bonzini <pbonzini@redhat.com> - 2016-07-12 21:30 +0200
Re: [RFC PATCH 3/4] KVM: x86: add support for emulating UMIP Radim Krčmář <rkrcmar@redhat.com> - 2016-07-13 22:10 +0200
Re: [RFC PATCH 3/4] KVM: x86: add support for emulating UMIP Paolo Bonzini <pbonzini@redhat.com> - 2016-07-14 09:10 +0200
Re: [RFC PATCH 3/4] KVM: x86: add support for emulating UMIP Radim Krčmář <rkrcmar@redhat.com> - 2016-07-14 14:30 +0200
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