From: Borislav Petkov <bp@alien8.de>
To: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: KVM <kvm@vger.kernel.org>, "Joerg Roedel" <joro@8bytes.org>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Radim Krčmář" <rkrcmar@redhat.com>,
"Tom Lendacky" <thomas.lendacky@amd.com>,
"Tony Luck" <tony.luck@intel.com>,
"Yazen Ghannam" <Yazen.Ghannam@amd.com>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/2] kvm/x86: Move MSR_K7_HWCR to svm.c
Date: Mon, 25 Mar 2019 20:38:49 +0100 [thread overview]
Message-ID: <20190325193821.GS12016@zn.tnic> (raw)
In-Reply-To: <20190325192111.GH31069@linux.intel.com>
On Mon, Mar 25, 2019 at 12:21:11PM -0700, Sean Christopherson wrote:
> Generally speaking, the goal is to support cross-vendor VMs without having
> to modify the guest kernel, i.e. exact emulation is out of scope. This
> means "emulating" cross-vendor MSRs that the guest expects to exist to the
> point where the guest won't explode, e.g. in the case of MSR_K7_HWCR, Linux
> expects the MSR to exist on all AMD platforms and AFAICT will die during
> boot if it doesn't.
>
> The rule of thumb for "what MSRs can a guest reasonably expect to exist"
> is fluid.
Ok, I'll keep it in the common MSR accessors in the next version.
Thx for confirming what I was suspecting.
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
next prev parent reply other threads:[~2019-03-25 19:38 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-25 17:16 [PATCH v4 0/2] x86/kvm: Enable MCE injection in the guest Borislav Petkov
2019-03-25 17:16 ` [PATCH 1/2] kvm/x86: Move MSR_K7_HWCR to svm.c Borislav Petkov
2019-03-25 18:05 ` Jim Mattson
2019-03-25 18:12 ` Borislav Petkov
2019-03-25 18:21 ` Sean Christopherson
2019-03-25 18:39 ` Borislav Petkov
2019-03-25 19:21 ` Sean Christopherson
2019-03-25 19:38 ` Borislav Petkov [this message]
2019-03-25 17:16 ` [PATCH 2/2] x86/kvm: Implement MSR_HWCR support Borislav Petkov
-- strict thread matches above, loose matches on Subject: below --
2018-06-28 17:38 [PATCH 0/2] x86/kvm: Enable MCE injection in the guest v2 Borislav Petkov
2018-06-28 17:38 ` [PATCH 1/2] kvm/x86: Move MSR_K7_HWCR to svm.c Borislav Petkov
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