From: Wanpeng Li <kernellwp@gmail.com>
To: qemu-devel@nongnu.org, kvm@vger.kernel.org
Cc: "Paolo Bonzini" <pbonzini@redhat.com>,
"Radim Krčmář" <rkrcmar@redhat.com>,
"Eduardo Habkost" <ehabkost@redhat.com>
Subject: [PATCH] kvm: support guest access CORE cstate
Date: Tue, 21 May 2019 14:17:47 +0800 [thread overview]
Message-ID: <1558419467-7155-1-git-send-email-wanpengli@tencent.com> (raw)
From: Wanpeng Li <wanpengli@tencent.com>
Allow guest reads CORE cstate when exposing host CPU power management capabilities
to the guest. PKG cstate is restricted to avoid a guest to get the whole package
information in multi-tenant scenario.
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
---
| 4 +++-
target/i386/kvm.c | 3 ++-
2 files changed, 5 insertions(+), 2 deletions(-)
--git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
index b53ee59..d648fde 100644
--- a/linux-headers/linux/kvm.h
+++ b/linux-headers/linux/kvm.h
@@ -696,9 +696,11 @@ struct kvm_ioeventfd {
#define KVM_X86_DISABLE_EXITS_MWAIT (1 << 0)
#define KVM_X86_DISABLE_EXITS_HLT (1 << 1)
#define KVM_X86_DISABLE_EXITS_PAUSE (1 << 2)
+#define KVM_X86_DISABLE_EXITS_CSTATE (1 << 3)
#define KVM_X86_DISABLE_VALID_EXITS (KVM_X86_DISABLE_EXITS_MWAIT | \
KVM_X86_DISABLE_EXITS_HLT | \
- KVM_X86_DISABLE_EXITS_PAUSE)
+ KVM_X86_DISABLE_EXITS_PAUSE | \
+ KVM_X86_DISABLE_EXITS_CSTATE)
/* for KVM_ENABLE_CAP */
struct kvm_enable_cap {
diff --git a/target/i386/kvm.c b/target/i386/kvm.c
index 3b29ce5..49a0cc1 100644
--- a/target/i386/kvm.c
+++ b/target/i386/kvm.c
@@ -1645,7 +1645,8 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
if (disable_exits) {
disable_exits &= (KVM_X86_DISABLE_EXITS_MWAIT |
KVM_X86_DISABLE_EXITS_HLT |
- KVM_X86_DISABLE_EXITS_PAUSE);
+ KVM_X86_DISABLE_EXITS_PAUSE |
+ KVM_X86_DISABLE_EXITS_CSTATE);
}
ret = kvm_vm_enable_cap(s, KVM_CAP_X86_DISABLE_EXITS, 0,
--
2.7.4
next reply other threads:[~2019-05-21 6:17 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-21 6:17 Wanpeng Li [this message]
2019-06-04 17:00 ` [PATCH] kvm: support guest access CORE cstate Paolo Bonzini
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=1558419467-7155-1-git-send-email-wanpengli@tencent.com \
--to=kernellwp@gmail.com \
--cc=ehabkost@redhat.com \
--cc=kvm@vger.kernel.org \
--cc=pbonzini@redhat.com \
--cc=qemu-devel@nongnu.org \
--cc=rkrcmar@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;
as well as URLs for NNTP newsgroup(s).