From: Brian Woods <brian.woods@amd.com>
To: xen-devel@lists.xen.org
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Brian Woods <brian.woods@amd.com>,
Jan Beulich <jbeulich@suse.com>,
Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Subject: [PATCH 0/2] Virtual GIF
Date: Thu, 16 Nov 2017 09:32:01 -0600 [thread overview]
Message-ID: <20171116153203.71358-1-brian.woods@amd.com> (raw)
On AMD family 17h processors, there is a feature called virtual GIF.
This allows a nested hypervisor to preform a CLGI or STGI without
needing to be intercepted by the host hypervisor. For more information
about it please see:
AMD64 Architecture Programmer’s Manual Volume 2: System Programming
http://support.amd.com/TechDocs/24593.pdf
Section: Virtual GIF (Section 15.33.2)
This patch series adds support to check for and enable the virtual
GIF features if available.
These patches were tested on a AMD family 17h (EPYC 7401) system.
Brian Woods (2):
x86/svm: Add virtual GIF feature definition
x86/svm: Add virtual GIF support
xen/arch/x86/hvm/svm/nestedsvm.c | 7 ++++++-
xen/arch/x86/hvm/svm/svm.c | 1 +
xen/arch/x86/hvm/svm/vmcb.c | 9 +++++++++
xen/include/asm-x86/hvm/svm/svm.h | 2 ++
xen/include/asm-x86/hvm/svm/vmcb.h | 6 ++++--
5 files changed, 22 insertions(+), 3 deletions(-)
--
2.11.0
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next reply other threads:[~2017-11-16 15:32 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-16 15:32 Brian Woods [this message]
2017-11-16 15:32 ` [PATCH 1/2] x86/svm: Add virtual GIF feature definition Brian Woods
2017-11-16 15:32 ` [PATCH 2/2] x86/svm: Add virtual GIF support Brian Woods
2017-11-16 15:50 ` Andrew Cooper
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