From: Saar Amar <Saar.Amar@microsoft.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Subject: RE: KVM: x86: Fix emulation of sysenter
Date: Wed, 19 Jun 2019 12:47:06 +0000 [thread overview]
Message-ID: <AM0PR83MB0307821E5CFD654F2E5F7403F1E50@AM0PR83MB0307.EURPRD83.prod.outlook.com> (raw)
In-Reply-To: <53b1ac7e-0170-b966-d3f0-298e291e9bdd@redhat.com>
Yeah I see there is not flow to en_sysenter which doesn't pass this logic. Thanks
-----Original Message-----
From: Paolo Bonzini <pbonzini@redhat.com>
Sent: Tuesday, June 18, 2019 5:12 PM
To: Saar Amar <Saar.Amar@microsoft.com>; kvm@vger.kernel.org
Cc: Radim Krčmář <rkrcmar@redhat.com>
Subject: Re: KVM: x86: Fix emulation of sysenter
On 18/06/19 15:19, Saar Amar wrote:
> I found a bug in sysenter emulation. Patch attached both in plaintext
> and as patch file.
Do you have a testcase for this? RF is cleared for all instructions here:
if (ctxt->rep_prefix && (ctxt->d & String))
ctxt->eflags |= X86_EFLAGS_RF;
else
ctxt->eflags &= ~X86_EFLAGS_RF;
just before em_sysenter is called.
Paolo
prev parent reply other threads:[~2019-06-19 12:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <AM0PR83MB0307F44E915135F79E291058F1EA0@AM0PR83MB0307.EURPRD83.prod.outlook.com>
2019-06-18 14:12 ` KVM: x86: Fix emulation of sysenter Paolo Bonzini
2019-06-19 12:47 ` Saar Amar [this message]
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