From: Paolo Bonzini <pbonzini@redhat.com>
To: Jim Mattson <jmattson@google.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>,
Liran Alon <liran.alon@oracle.com>,
dwmw@amazon.co.uk, bp@alien8.de, aliguori@amazon.com,
Tom Lendacky <thomas.lendacky@amd.com>,
LKML <linux-kernel@vger.kernel.org>,
kvm list <kvm@vger.kernel.org>
Subject: Re: [PATCH 6/7] x86/svm: Set IBPB when running a different VCPU
Date: Tue, 9 Jan 2018 22:42:46 +0100 [thread overview]
Message-ID: <705f09f9-843f-97cb-4d4b-4b6818fcca7a@redhat.com> (raw)
In-Reply-To: <CALMp9eTsNSFgrZWWN9BeeTHuGdWXHvC1Db71nnWcVKxz7nnVrw@mail.gmail.com>
On 09/01/2018 21:57, Jim Mattson wrote:
> Before VM-entry, don't we need to flush the BHB and the RSB to avoid
> revealing KASLR information to the guest? (Thanks to Liran for
> pointing this out.)
I don't know how you flush the BHB? As to the RSB, that would also be
part of generic Linux code so I've not included it yet in this series
which was mostly about the new MSRs and CPUID bits.
Paolo
next prev parent reply other threads:[~2018-01-09 21:42 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-09 15:00 Liran Alon
2018-01-09 15:19 ` Arjan van de Ven
2018-01-09 16:17 ` Paolo Bonzini
2018-01-09 16:23 ` Arjan van de Ven
2018-01-09 16:49 ` Paolo Bonzini
2018-01-09 20:39 ` Konrad Rzeszutek Wilk
2018-01-09 20:47 ` Konrad Rzeszutek Wilk
2018-01-09 20:57 ` Jim Mattson
2018-01-09 21:11 ` Konrad Rzeszutek Wilk
2018-01-09 21:19 ` Jim Mattson
2018-01-09 21:42 ` Paolo Bonzini [this message]
2018-01-09 21:59 ` Jim Mattson
2018-01-09 21:56 ` Paolo Bonzini
-- strict thread matches above, loose matches on Subject: below --
2018-01-09 16:01 Liran Alon
2018-01-09 15:33 Liran Alon
2018-01-09 15:56 ` Arjan van de Ven
2018-01-09 11:31 Liran Alon
2018-01-09 11:41 ` Paolo Bonzini
2018-01-09 14:30 ` Arjan van de Ven
2018-01-08 18:08 [PATCH 0/7] KVM: x86: expose CVE-2017-5715 ("Spectre variant 2") mitigations to guest Paolo Bonzini
2018-01-08 18:08 ` [PATCH 6/7] x86/svm: Set IBPB when running a different VCPU Paolo Bonzini
2018-01-08 20:00 ` Liran Alon
2018-01-09 11:07 ` Paolo Bonzini
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