From mboxrd@z Thu Jan 1 00:00:00 1970 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 49137239E61; Wed, 23 Jul 2025 17:54:24 +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=1753293265; cv=none; b=GaqSSbfC9F0L32oOXrhY+MU+dDozGg7smux0RIlTyjwuo4OX0sRRxAjUuRm775YEMAAdFwe3LHClVtzdt0388bFA3XfxRpp3kuRAim2OJxEDBzleol6WQivArJ8wN1zFyB16bsw6XJ/6/T7QEN6k/5buHYlHX0mfr3zgCCA4RUQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753293265; c=relaxed/simple; bh=hHS4T4xizHF1v5opf01KtrsUhPUdZsbEgyf10Bk/Ppk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=KSFjMTEcCiFHLpvfEV/ceH8t70MggJ6888dW+9Gn+lXd94+GNEncOC+ydj6d8jLlJWJngkGWFqkF9p1W2VBno5mzvXfIWgXvG6k8YqnUFOhgO9mk7n8D7khgtIHbyblYUCPKYCA1JOh6/rtdof6cr2ofpB+S2Nn15QdSLrkmHlQ= 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=UFsrrf8u; 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="UFsrrf8u" 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 56NHrf081284522 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Wed, 23 Jul 2025 10:54:02 -0700 DKIM-Filter: OpenDKIM Filter v2.11.0 mail.zytor.com 56NHrf081284522 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zytor.com; s=2025072201; t=1753293243; bh=dxRY8GwK+pkOBhljZWvpX9p8RnJIOV8DEDDL8qeM9LE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UFsrrf8u83GGvS2vrmpFCTlwEw+oxXNe2eVKHxBC8IhMMhMKF/RtU7Ze8V6uagsMD eiNJDPMBc9cvQjLAVdpQjoowUaN85+2oOrijcNH2IIbdG7Q21Gmojk9bDj1puhuMXl 84jAzmHdMQ56bc/WlLvO88/vgL4JxeJRQzb9EiW0LATgDy7kSRZWhjQBVjJI5BThq+ DpwYnTDwYTczFumBjBjzb1kf53wIRL8goH0X7VrnZq9HiIGFC+lQ/Ah/kGsMhaaphZ 2jokVGKpHtyEdUbZW9jl0fFFHJipDJt6BZIMnhKXPX9ThTRX7erytyRhojz9fWq3/j k5sIXEKYN9KYg== 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 v5 18/23] KVM: x86: Advertise support for FRED Date: Wed, 23 Jul 2025 10:53:36 -0700 Message-ID: <20250723175341.1284463-19-xin@zytor.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250723175341.1284463-1-xin@zytor.com> References: <20250723175341.1284463-1-xin@zytor.com> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 e2836a255b16..d2dd6beb4376 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -979,6 +979,7 @@ 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), -- 2.50.1