From: "Nikunj A. Dadhania" <nikunj@amd.com>
To: <seanjc@google.com>, <pbonzini@redhat.com>
Cc: <x86@kernel.org>, <babu.moger@amd.com>,
<linux-kernel@vger.kernel.org>, <kvm@vger.kernel.org>,
<thomas.lendacky@amd.com>, <santosh.shukla@amd.com>,
<bp@alien8.de>
Subject: Re: [PATCH v2] KVM: x86: Advertise AVX512 Bit Matrix Multiply (BMM) to userspace
Date: Tue, 17 Mar 2026 15:06:37 +0530 [thread overview]
Message-ID: <a2fff932-b841-4805-8d82-d0d5328f19c4@amd.com> (raw)
In-Reply-To: <20260210053511.1612505-1-nikunj@amd.com>
On 2/10/2026 11:05 AM, Nikunj A Dadhania wrote:
> Advertise AVX512 Bit Matrix Multiply (BMM) and Bit Reversal instructions to
> userspace via CPUID leaf 0x80000021_EAX[23]. This feature enables bit
> matrix multiply operations and bit reversal.
>
> While at it, reorder PREFETCHI to match the bit position order in CPUID
> leaf 0x80000021_EAX for better organization.
>
> Signed-off-by: Nikunj A Dadhania <nikunj@amd.com>
> ---
A gentle reminder.
>
> AMD64 Bit Matrix Multiply and Bit Reversal Instructions
> Publication #69192 Revision: 1.00
> Issue Date: January 2026
>
> https://docs.amd.com/v/u/en-US/69192-PUB
> ---
> arch/x86/include/asm/cpufeatures.h | 1 +
> arch/x86/kvm/cpuid.c | 3 ++-
> 2 files changed, 3 insertions(+), 1 deletion(-)
next prev parent reply other threads:[~2026-03-17 9:36 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-10 5:35 [PATCH v2] KVM: x86: Advertise AVX512 Bit Matrix Multiply (BMM) to userspace Nikunj A Dadhania
2026-03-17 9:36 ` Nikunj A. Dadhania [this message]
2026-04-03 15:13 ` Sean Christopherson
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