From: Chao Gao <chao.gao@intel.com>
To: Hao Xiang <hao.xiang@linux.alibaba.com>
Cc: <kvm@vger.kernel.org>, <shannon.zhao@linux.alibaba.com>,
<pbonzini@redhat.com>, <seanjc@google.com>,
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] kvm: x86: emulate MSR_PLATFORM_INFO msr bits
Date: Mon, 21 Aug 2023 15:52:01 +0800 [thread overview]
Message-ID: <ZOMWM+YmScUG3U5W@chao-email> (raw)
In-Reply-To: <1692588392-58155-1-git-send-email-hao.xiang@linux.alibaba.com>
On Mon, Aug 21, 2023 at 11:26:32AM +0800, Hao Xiang wrote:
>For intel platform, The BzyMhz field of Turbostat shows zero
>due to the missing of part msr bits of MSR_PLATFORM_INFO.
>
>Acquire necessary msr bits, and expose following msr info to guest,
>to make sure guest can get correct turbo frequency info.
Userspace VMM (e.g., QEMU) can configure this MSR for guests. Please refer to
tools/testing/selftests/kvm/x86_64/platform_info_test.c.
The question is why KVM needs this patch given KVM already provides interfaces
for QEMU to configure the MSR.
next prev parent reply other threads:[~2023-08-21 7:52 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-21 3:26 [PATCH] kvm: x86: emulate MSR_PLATFORM_INFO msr bits Hao Xiang
2023-08-21 7:52 ` Chao Gao [this message]
2023-08-21 9:11 ` Hao Xiang
2023-08-21 10:44 ` Chao Gao
2023-08-21 11:44 ` Hao Xiang
2023-08-21 16:11 ` Sean Christopherson
2023-08-23 6:24 ` Xiaoyao Li
2023-08-23 14:31 ` Sean Christopherson
2023-08-25 3:27 ` Xiaoyao Li
-- strict thread matches above, loose matches on Subject: below --
2023-08-21 3:22 Hao Xiang
2023-08-22 16:50 ` kernel test robot
2023-08-23 0:26 ` kernel test robot
2023-08-23 3:41 ` Xiaoyao Li
2023-08-21 3:19 Hao Xiang
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