From nobody Sun Dec 14 23:38:49 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 580C02FE566; Sun, 26 Oct 2025 20:20:29 +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=1761510031; cv=none; b=bcj7/UR8fBBuP00zg4MXglD5QPWXRG6B+5A1VFhg1gX8cOfhSlgAd+yfd6OQSUlOQxw4H2VVV/cuSOaFmWkjjXsgQ+aTpwioUcw3FggFAHrOJO2sXT7mIaBFR2lyqvUP12/BlKpxfMCo4TAoI4qyYRKhtygN7K/I+C7dhPUKfoM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761510031; c=relaxed/simple; bh=QFbjesLU6/4x2fV5wDJaSgO3HcI1agNqWN+ZFEnPcN4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=txpd7DsuuFJOXOM6nmXz0U4cvKI3mGdSy0XxYjueM0LFJJZPhyWmm0FMSMG0JQkL1igOfPHdCLYtapHMui8Bt9UtFqpeYlhu6DctIjLDJcA/nT1flHpYVPxWcKLQfyGr8VfS4Qq9YOKZzPbpgjG9BJhXMQtcNlHnMLKYvQH2D7Q= 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=Wc0QTjgv; 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="Wc0QTjgv" 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 59QKJBkY505258 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Sun, 26 Oct 2025 13:19:35 -0700 DKIM-Filter: OpenDKIM Filter v2.11.0 mail.zytor.com 59QKJBkY505258 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zytor.com; s=2025102301; t=1761509976; bh=UVXM0OsyA/ujAJTGh70nKk0R5cfalx0gkggROqCrgso=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Wc0QTjgvMabUVWdVdpaxCRgKzWIhCNbfuk5b96kGjXBkTIpukdNMUhpxgCs704Ceh 85eozNjLbHCdiY9CX6it6KnInT5CNuFjOc3vmkn9pXKVQZp4IXZ7xDCRviBcH3QWjk Dp2G6MkF2GRthLpR1FAfB0fp2KTxGj2KOemSP8MUXP0DxAdTY4qDnPPuw4q//j7eG5 sW7SVxWmvxyAq3LELf+lpzhARfUDDcijWH/sVvYogFhzE65zpnpzgRMgcF0HlGkkkk C7FNhey0K0ym1Yas797AY2/DdF8I2/PvzS3exGTDd5WXsC3CKn20CLRZaLlLhrKMWK ih+hOTaKvFLpA== 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, sohil.mehta@intel.com Subject: [PATCH v9 17/22] KVM: x86: Advertise support for FRED Date: Sun, 26 Oct 2025 13:19:05 -0700 Message-ID: <20251026201911.505204-18-xin@zytor.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251026201911.505204-1-xin@zytor.com> References: <20251026201911.505204-1-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 Reviewed-by: Chao Gao --- 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 d563a948318b..0bf97b8a3216 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