From nobody Fri Dec 19 19:03:17 2025 Received: from mail.zytor.com (terminus.zytor.com [198.137.202.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5F31620459A; Tue, 14 Oct 2025 01:10:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.136 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760404238; cv=none; b=SsIqE7PVwBzhYQTibbHywJr6Qf1/IRZi+kHEWkxdgSZH9A5nJKQhoTO1AhyVhz8/fs+vJUan57MDzlCVhSgJoggH0tmSnb4v7Yaoe1fBaACe9uKAT+l0u53GVRn0w1ZtpG2HxKQhkRGmF2fmUkUwA9GuG2LGF57nuuTvS481LO0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760404238; c=relaxed/simple; bh=1cmCUMS7mG4f28VNM+CU4smnr2ARWXs2ei2X92Wc0Yo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=sdZwOJSjID6hIg3qTzei8VXpZAL7UmfeeeXRj5ipSIhO1eqjkDOhXjl9/hHC6AxM5wg+Ua/L+CjrBIjqyINR86jzyBoSxQUUbuZFGHBAvpN2mDKq7G/EFsl0WP1uQxWpKcgUGFVQNwnLQP6v81rnnV7hYZlNFAi2NQHTaAu+J2g= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zytor.com; spf=pass smtp.mailfrom=zytor.com; dkim=pass (2048-bit key) header.d=zytor.com header.i=@zytor.com header.b=K/iZre5+; arc=none smtp.client-ip=198.137.202.136 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zytor.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=zytor.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=zytor.com header.i=@zytor.com header.b="K/iZre5+" Received: from terminus.zytor.com (terminus.zytor.com [IPv6:2607:7c80:54:3:0:0:0:136]) (authenticated bits=0) by mail.zytor.com (8.18.1/8.17.1) with ESMTPSA id 59E19p1d1568441 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Mon, 13 Oct 2025 18:10:10 -0700 DKIM-Filter: OpenDKIM Filter v2.11.0 mail.zytor.com 59E19p1d1568441 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zytor.com; s=2025092201; t=1760404210; bh=fXxLpy7MWKqs5wtbmtbBzXIJW+LafuV0UecNrrgbowE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=K/iZre5++7t6qKD3aL2gPA+3D8zE1hIWc3Fv4K41BIKxV3PiaPICffeXeolxogdW4 x0wy6A/rK+Gupq9l42bLT40D9rlUJ8LG1xy1VmxaONUFJ+33VqNFlxSnPXkw2EKt4o Zw/5fgUA9X0Px7nHRK+jwlYv3b7lOy8U9uM3F+16KbG7cBeSut9e2V5+3Aipzbo+zU bXdKoAGhCwoX+DuGtHxlbn9vJVfoOFrwFec5+ampdH01wKrNiGUB0FX85dMZOxQimz ZVOC7y/pMyaATzqycbBqIojVAKjvlVE00iuCwth4QBgh5Xu2Idu78JfQqLbCr+TCKU rK9c78kcWEA5w== From: "Xin Li (Intel)" To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org Cc: pbonzini@redhat.com, seanjc@google.com, corbet@lwn.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, xin@zytor.com, luto@kernel.org, peterz@infradead.org, andrew.cooper3@citrix.com, chao.gao@intel.com, hch@infradead.org Subject: [PATCH v8 16/21] KVM: x86: Advertise support for FRED Date: Mon, 13 Oct 2025 18:09:45 -0700 Message-ID: <20251014010950.1568389-17-xin@zytor.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251014010950.1568389-1-xin@zytor.com> References: <20251014010950.1568389-1-xin@zytor.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Xin Li Advertise support for FRED to userspace after changes required to enable FRED in a KVM guest are in place. Signed-off-by: Xin Li Signed-off-by: Xin Li (Intel) Tested-by: Shan Kang Tested-by: Xuelian Guo --- Change in v5: * Don't advertise FRED/LKGS together, LKGS can be advertised as an independent feature (Sean). * Add TB from Xuelian Guo. --- arch/x86/kvm/cpuid.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 52524e0ca97f..f4ff5ccbcf1e 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -1014,6 +1014,7 @@ void kvm_set_cpu_caps(void) F(FSRS), F(FSRC), F(WRMSRNS), + X86_64_F(FRED), X86_64_F(LKGS), F(AMX_FP16), F(AVX_IFMA), --=20 2.51.0