[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <160867624053.3471.7106539070175910424.stgit@bmoger-ubuntu>
Date: Tue, 22 Dec 2020 16:31:26 -0600
From: Babu Moger <babu.moger@....com>
To: pbonzini@...hat.com, tglx@...utronix.de, mingo@...hat.com,
bp@...en8.de
Cc: fenghua.yu@...el.com, tony.luck@...el.com, wanpengli@...cent.com,
kvm@...r.kernel.org, thomas.lendacky@....com, peterz@...radead.org,
seanjc@...gle.com, joro@...tes.org, x86@...nel.org,
kyung.min.park@...el.com, linux-kernel@...r.kernel.org,
krish.sadhukhan@...cle.com, hpa@...or.com, mgross@...ux.intel.com,
vkuznets@...hat.com, kim.phillips@....com, wei.huang2@....com,
jmattson@...gle.com
Subject: [PATCH v2 0/2] x86: Add the feature Virtual SPEC_CTRL
Newer AMD processors have a feature to virtualize the use of the
SPEC_CTRL MSR on the guest. The series adds the feature support
and enables the feature on SVM.
---
v2:
NOTE: This is not final yet. Sending out the patches to make
sure I captured all the comments correctly.
1. Most of the changes are related to Jim and Sean's feedback.
2. Improved the description of patch #2.
3. Updated the vmcb save area's guest spec_ctrl value(offset 0x2E0)
properly. Initialized during init_vmcb and svm_set_msr and
returned the value from save area for svm_get_msr.
4. As Jim commented, transferred the value into the VMCB prior
to VMRUN and out of the VMCB after #VMEXIT.
5. Added kvm-unit-test to detect the SPEC CTRL feature.
https://lore.kernel.org/kvm/160865324865.19910.5159218511905134908.stgit@bmoger-ubuntu/
6. Sean mantioned of renaming MSR_AMD64_VIRT_SPEC_CTRL. But, it might
create even more confusion, so dropped the idea for now.
v1:
https://lore.kernel.org/kvm/160738054169.28590.5171339079028237631.stgit@bmoger-ubuntu/
---
Babu Moger (2):
x86/cpufeatures: Add the Virtual SPEC_CTRL feature
KVM: SVM: Add support for Virtual SPEC_CTRL
arch/x86/include/asm/cpufeatures.h | 1 +
arch/x86/include/asm/svm.h | 4 +++-
arch/x86/kvm/svm/svm.c | 29 +++++++++++++++++++++++++----
3 files changed, 29 insertions(+), 5 deletions(-)
--
Powered by blists - more mailing lists