From: Tom Lendacky <thomas.lendacky@amd.com>
To: Boris Ostrovsky <boris.ostrovsky@oracle.com>,
linux-arch@vger.kernel.org, linux-efi@vger.kernel.org,
kvm@vger.kernel.org, linux-doc@vger.kernel.org, x86@kernel.org,
kexec@lists.infradead.org, linux-kernel@vger.kernel.org,
kasan-dev@googlegroups.com, linux-mm@kvack.org,
iommu@lists.linux-foundation.org
Cc: "Brijesh Singh" <brijesh.singh@amd.com>,
"Toshimitsu Kani" <toshi.kani@hpe.com>,
"Radim Krčmář" <rkrcmar@redhat.com>,
"Matt Fleming" <matt@codeblueprint.co.uk>,
"Alexander Potapenko" <glider@google.com>,
"H. Peter Anvin" <hpa@zytor.com>,
"Larry Woodman" <lwoodman@redhat.com>,
"Jonathan Corbet" <corbet@lwn.net>,
"Joerg Roedel" <joro@8bytes.org>,
"Michael S. Tsirkin" <mst@redhat.com>,
"Ingo Molnar" <mingo@redhat.com>,
"Andrey Ryabinin" <aryabinin@virtuozzo.com>,
"Dave Young" <dyoung@redhat.com>,
"Rik van Riel" <riel@redhat.com>, "Arnd Bergmann" <arnd@arndb.de>,
"Borislav Petkov" <bp@alien8.de>,
"Andy Lutomirski" <luto@kernel.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Dmitry Vyukov" <dvyukov@google.com>,
"Juergen Gross" <jgross@suse.com>,
xen-devel <xen-devel@lists.xen.org>,
"Paolo Bonzini" <pbonzini@redhat.com>
Subject: Re: [PATCH v6 10/34] x86, x86/mm, x86/xen, olpc: Use __va() against just the physical address in cr3
Date: Thu, 8 Jun 2017 16:02:37 -0500 [thread overview]
Message-ID: <fcb196c8-f1eb-a38c-336c-7bd3929b029e__15318.5733980083$1496955823$gmane$org@amd.com> (raw)
In-Reply-To: <67fe69ac-a213-8de3-db28-0e54bba95127@oracle.com>
On 6/8/2017 3:51 PM, Boris Ostrovsky wrote:
>
>>
>>> What may be needed is making sure X86_FEATURE_SME is not set for PV
>>> guests.
>>
>> And that may be something that Xen will need to control through either
>> CPUID or MSR support for the PV guests.
>
>
> Only on newer versions of Xen. On earlier versions (2-3 years old) leaf
> 0x80000007 is passed to the guest unchanged. And so is MSR_K8_SYSCFG.
The SME feature is in leaf 0x8000001f, is that leaf passed to the guest
unchanged?
Thanks,
Tom
>
> -boris
>
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Xen-devel@lists.xen.org
https://lists.xen.org/xen-devel
next prev parent reply other threads:[~2017-06-08 21:02 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20170607191309.28645.15241.stgit@tlendack-t1.amdoffice.net>
[not found] ` <20170607191453.28645.92256.stgit@tlendack-t1.amdoffice.net>
2017-06-07 22:06 ` [PATCH v6 10/34] x86, x86/mm, x86/xen, olpc: Use __va() against just the physical address in cr3 Boris Ostrovsky
[not found] ` <b15e8924-4069-b5fa-adb2-86c164b1dd36@oracle.com>
2017-06-08 13:42 ` Tom Lendacky
[not found] ` <4a7376fb-abfc-8edd-42b7-38de461ac65e@amd.com>
2017-06-08 20:51 ` Boris Ostrovsky
[not found] ` <67fe69ac-a213-8de3-db28-0e54bba95127@oracle.com>
2017-06-08 21:02 ` Tom Lendacky [this message]
[not found] ` <fcb196c8-f1eb-a38c-336c-7bd3929b029e@amd.com>
2017-06-08 21:17 ` Boris Ostrovsky
[not found] ` <12c7e511-996d-cf60-3a3b-0be7b41bd85b@oracle.com>
2017-06-08 22:01 ` Andrew Cooper
[not found] ` <d37917b1-8e49-e8a8-b9ac-59491331640f@citrix.com>
2017-06-09 18:36 ` Tom Lendacky
[not found] ` <9725c503-2e33-2365-87f5-f017e1cbe9b6@amd.com>
2017-06-09 18:43 ` Boris Ostrovsky
[not found] ` <8e8eac45-95be-f1b5-6f44-f131d275f7bc@oracle.com>
2017-06-09 18:54 ` Andrew Cooper
2017-06-09 18:59 ` Tom Lendacky
[not found] ` <33f20df0-bf71-bd9d-7a7e-4fb5e8793400@amd.com>
2017-06-09 19:42 ` Boris Ostrovsky
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