From: Paolo Bonzini <pbonzini@redhat.com>
To: Andrew Cooper <andrew.cooper3@citrix.com>,
Wanpeng Li <kernellwp@gmail.com>,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Subject: Re: [PATCH] KVM: X86: Fix the decoding of segment overrides in 64bit mode
Date: Thu, 22 Mar 2018 13:38:05 +0100 [thread overview]
Message-ID: <9bd82cb0-d88f-4891-a111-3704802e1d4e@redhat.com> (raw)
In-Reply-To: <e9db6804-4881-be93-f570-e9631dbccac8@citrix.com>
On 22/03/2018 12:04, Andrew Cooper wrote:
> We've got a Force Emulation Prefix (ud2a; .ascii "xen") for doing
> magic. Originally, this was used for PV guests to explicitly request an
> emulated CPUID, but I extended it to HVM guests for "emulate the next
> instruction", after we had some guest user => guest kernel privilege
> escalations because of incorrect emulation.
Wanpeng, why don't you add it behind a new kvm module parameter? :)
Paolo
next prev parent reply other threads:[~2018-03-22 12:38 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-22 8:34 Wanpeng Li
2018-03-22 10:07 ` Paolo Bonzini
2018-03-22 10:19 ` Andrew Cooper
2018-03-22 10:42 ` Paolo Bonzini
2018-03-22 11:04 ` Andrew Cooper
2018-03-22 11:14 ` Wanpeng Li
2018-03-22 12:38 ` Paolo Bonzini [this message]
2018-03-22 13:39 ` Wanpeng Li
2018-03-22 13:53 ` Andrew Cooper
2018-03-23 14:27 ` Wanpeng Li
2018-03-23 14:43 ` Andrew Cooper
2018-03-23 15:04 ` Paolo Bonzini
2018-03-26 12:25 ` Wanpeng Li
2018-03-26 12:27 ` Paolo Bonzini
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