From: prasadjoshi.linux@gmail.com
To: prasadjoshi.linux@gmail.com
Cc: kvm@vger.kernel.org, joro@8bytes.org, mtosatti@redhat.com,
gleb@redhat.com
Subject: [PATCH] kvm:x86/svm: enable SVM lock if host supports it
Date: Wed, 17 Apr 2013 23:03:33 +0530 [thread overview]
Message-ID: <1366220013-2107-1-git-send-email-prasadjoshi.linux@gmail.com> (raw)
From: Prasad Joshi <prasadjoshi.linux@gmail.com>
SVM lock features allows software from preventing update to EFER.SVME.
Enable the SVM lock in guest if it is supported on host machine.
Signed-off-by: Prasad Joshi <prasadjoshi.linux@gmail.com>
---
arch/x86/kvm/svm.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index e1b1ce2..fcdfdea 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -4031,6 +4031,10 @@ static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
if (boot_cpu_has(X86_FEATURE_NRIPS))
entry->edx |= SVM_FEATURE_NRIP;
+ /* support SVM Lock if host supports it */
+ if (boot_cpu_has(X86_FEATURE_SVML))
+ entry->edx |= SVM_FEATURE_SVML;
+
/* Support NPT for the guest if enabled */
if (npt_enabled)
entry->edx |= SVM_FEATURE_NPT;
--
1.7.10.4
next reply other threads:[~2013-04-17 17:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-17 17:33 prasadjoshi.linux [this message]
2013-04-17 19:48 ` [PATCH] kvm:x86/svm: enable SVM lock if host supports it Joerg Roedel
2013-04-21 8:49 ` Prasad Joshi
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1366220013-2107-1-git-send-email-prasadjoshi.linux@gmail.com \
--to=prasadjoshi.linux@gmail.com \
--cc=gleb@redhat.com \
--cc=joro@8bytes.org \
--cc=kvm@vger.kernel.org \
--cc=mtosatti@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox