From: Roman Bolshakov <r.bolshakov@yadro.com>
To: <yaroshchuk2000@gmail.com>
Cc: qemu-trivial@nongnu.org, qemu-devel@nongnu.org
Subject: Re: [PATCH] target/i386/hvf: add rdmsr 35H MSR_CORE_THREAD_COUNT
Date: Tue, 9 Feb 2021 13:33:01 +0300 [thread overview]
Message-ID: <YCJk3dGc2xnJdFXG@SPB-NB-133.local> (raw)
In-Reply-To: <20210113205323.33310-1-yaroshchuk2000@gmail.com>
On Wed, Jan 13, 2021 at 11:53:23PM +0300, yaroshchuk2000@gmail.com wrote:
> From: Vladislav Yaroshchuk <yaroshchuk2000@gmail.com>
>
> Some guests (ex. Darwin-XNU) can attemp to read this MSR to retrieve and
> validate CPU topology comparing it to ACPI MADT content
>
> MSR description from Intel Manual:
> 35H: MSR_CORE_THREAD_COUNT: Configured State of Enabled Processor Core
> Count and Logical Processor Count
>
> Bits 15:0 THREAD_COUNT The number of logical processors that are
> currently enabled in the physical package
>
> Bits 31:16 Core_COUNT The number of processor cores that are currently
> enabled in the physical package
>
> Bits 63:32 Reserved
>
> Signed-off-by: Vladislav Yaroshchuk <yaroshchuk2000@gmail.com>
> ---
> target/i386/cpu.h | 2 ++
> target/i386/hvf/x86_emu.c | 5 +++++
> 2 files changed, 7 insertions(+)
>
Queued, thanks!
-Roman
prev parent reply other threads:[~2021-02-09 10:34 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-13 20:53 [PATCH] target/i386/hvf: add rdmsr 35H MSR_CORE_THREAD_COUNT yaroshchuk2000
2021-02-09 10:33 ` Roman Bolshakov [this message]
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