From patchwork Wed Feb 7 17:26:42 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Li, Xin3" X-Patchwork-Id: 13548884 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) (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 2259A13541B; Wed, 7 Feb 2024 17:59:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.11 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707328763; cv=none; b=DyHcAdKbVnFLldBVf+0MtoE1sGE4N8O/IaPCKeacKMGUusKK2qpewEmSYIFXTNECJbqUJuMLPnt8FH6FxURsidL54y6N3FIEConjL8pdYk35QGfVHjBfkIcIQs4NwELLt4LnUpsHSbdkr0Q80LHwa3dwWaK0YHuI5JWLmUjilu8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707328763; c=relaxed/simple; bh=gY2JzDeF5jrwJMCmaKGSaYZDR3/rk8mwy1w2IX+fWds=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=rp2+JRlbNEEaTgj2PxYDudUrHFLcf43WF10aev62ndxWtZfjmsyYJ0cMSVqlMaiSdEalx131b92PpmvWBDUuynKpcDnLgvtd4DJt31RR6KUkfAtNZqUyaEg1CNRKeShJwaldoW/jN9bZ9m4XfCpFJeVLzwc2Db2Kp/PREXJZM2Y= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=hAQGWwPc; arc=none smtp.client-ip=198.175.65.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="hAQGWwPc" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1707328762; x=1738864762; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=gY2JzDeF5jrwJMCmaKGSaYZDR3/rk8mwy1w2IX+fWds=; b=hAQGWwPce/F3knbJgkrpM+1aBaOvcVsWOrHp24cc1F9iW2UNacHs3o5K opVvsjAstIjkqh/cZuz+Aroz/4ES7DsAp78ZOcyIfI6ul9O5uFcJ6MGTN jrzsrtIfU2moUTHpqBfEqQ4AN4X5KLOmIIGOakHdje37lv3I/fvEF8/5p WQrz3bfs+mhXQzcRx1tbCN9oqRdSLhW41PlesapGxNK3irVn+oSEbD89l ZjZ8coCqYq7/P/ircZaTWx40uFkPxEhCxc91EQCVqzQnH0dxuOq7PzjmX kaYnd7YDwWoKdsME1EkApPYF11Tvh1EZvsJboupjIYmeP4tbtXl6yrugl A==; X-IronPort-AV: E=McAfee;i="6600,9927,10977"; a="11622679" X-IronPort-AV: E=Sophos;i="6.05,251,1701158400"; d="scan'208";a="11622679" Received: from fmviesa004.fm.intel.com ([10.60.135.144]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Feb 2024 09:59:00 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.05,251,1701158400"; d="scan'208";a="6020765" Received: from unknown (HELO fred..) ([172.25.112.68]) by fmviesa004.fm.intel.com with ESMTP; 07 Feb 2024 09:58:59 -0800 From: Xin Li To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: seanjc@google.com, pbonzini@redhat.com, corbet@lwn.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, shuah@kernel.org, vkuznets@redhat.com, peterz@infradead.org, ravi.v.shankar@intel.com, xin@zytor.com Subject: [PATCH v2 22/25] KVM: x86: Allow FRED/LKGS/WRMSRNS to be exposed to guests Date: Wed, 7 Feb 2024 09:26:42 -0800 Message-ID: <20240207172646.3981-23-xin3.li@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240207172646.3981-1-xin3.li@intel.com> References: <20240207172646.3981-1-xin3.li@intel.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Allow FRED/LKGS/WRMSRNS to be exposed to guests, thus a guest OS could see these features when the guest is configured with FRED/LKGS/WRMSRNS in Qemu. A qemu patch is required to expose FRED/LKGS/WRMSRNS to KVM guests. Signed-off-by: Xin Li Tested-by: Shan Kang --- arch/x86/kvm/cpuid.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index adba49afb5fe..afc1316d78ad 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -676,8 +676,8 @@ void kvm_set_cpu_caps(void) kvm_cpu_cap_mask(CPUID_7_1_EAX, F(AVX_VNNI) | F(AVX512_BF16) | F(CMPCCXADD) | - F(FZRM) | F(FSRS) | F(FSRC) | - F(AMX_FP16) | F(AVX_IFMA) | F(LAM) + F(FZRM) | F(FSRS) | F(FSRC) | F(FRED) | F(LKGS) | + F(WRMSRNS) | F(AMX_FP16) | F(AVX_IFMA) | F(LAM) ); kvm_cpu_cap_init_kvm_defined(CPUID_7_1_EDX,