From: "Radim Krčmář" <rkrcmar@redhat.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Alexander Graf <agraf@suse.de>,
"Michael S. Tsirkin" <mst@redhat.com>,
"Gabriel L. Somlo" <gsomlo@gmail.com>
Subject: [PATCH 0/4] KVM: x86: kvm_mwait_in_guest() cleanup and fixes
Date: Wed, 3 May 2017 21:37:29 +0200 [thread overview]
Message-ID: <20170503193733.13409-1-rkrcmar@redhat.com> (raw)
kvm_mwait_in_guest() was overcomplicated and also missed one AMD bug
that should prevent MWAIT pass through.
This series ignores errata that don't have any Linux bug defined;
I know of two minor (not affecting the host) Core 2 errata:
AG36. Split Locked Stores May not Trigger the Monitoring Hardware
AG106. A REP STOS/MOVS to a MONITOR/MWAIT Address Range May Prevent
Triggering of the Monitoring Hardware
None of them are really worthy of a new condition if Linux never hit
them ... we still have the OS X bug that Gabriel is hitting, but I'm ok
with the original approach that sacrificed it for "greater good".
Radim Krčmář (4):
KVM: svm: prevent MWAIT in guest with erratum 400
KVM: x86: prevent MWAIT in guest with buggy MONITOR
KVM: x86: drop bogus MWAIT check
KVM: x86: simplify kvm_mwait_in_guest()
arch/x86/kvm/x86.h | 33 +++------------------------------
1 file changed, 3 insertions(+), 30 deletions(-)
--
2.12.2
next reply other threads:[~2017-05-03 19:38 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-03 19:37 Radim Krčmář [this message]
2017-05-03 19:37 ` [PATCH 1/4] KVM: svm: prevent MWAIT in guest with erratum 400 Radim Krčmář
2017-05-03 20:11 ` Borislav Petkov
2017-05-04 14:02 ` Radim Krčmář
2017-05-04 16:45 ` Borislav Petkov
2017-05-03 19:37 ` [PATCH 2/4] KVM: x86: prevent MWAIT in guest with buggy MONITOR Radim Krčmář
2017-05-03 19:37 ` [PATCH 3/4] KVM: x86: drop bogus MWAIT check Radim Krčmář
2017-05-04 10:58 ` Paolo Bonzini
2017-05-04 14:33 ` Radim Krčmář
2017-05-04 18:29 ` Michael S. Tsirkin
2017-05-04 20:03 ` Radim Krčmář
2017-05-04 18:26 ` Michael S. Tsirkin
2017-05-03 19:37 ` [PATCH 4/4] KVM: x86: simplify kvm_mwait_in_guest() Radim Krčmář
2017-05-03 19:45 ` [PATCH 0/4] KVM: x86: kvm_mwait_in_guest() cleanup and fixes Alexander Graf
2017-05-04 17:56 ` Gabriel L. Somlo
2017-05-04 18:07 ` Radim Krčmář
2017-05-05 13:02 ` Gabriel L. Somlo
2017-05-06 16:48 ` Gabriel L. Somlo
2017-05-08 7:23 ` Paolo Bonzini
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