From nobody Sat Oct 4 01:43:16 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 B2033393DE0; Thu, 21 Aug 2025 22:37:59 +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=1755815884; cv=none; b=kDPAX2v/t923IknIooaL+MwHTHIbqOViWvGC9hItNIMwTOTfH6WdzzEZ0m3MmaNf3slNIyEKzQpI7QDS1y/S0OSmA5r7DgZvrFlt3o42bLQpU4fJzWPCQO4xHPwrD1mcZyc0kJuMZpDj+NK4WAstrGa+NOpxG96MpDMnpkM/VPk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755815884; c=relaxed/simple; bh=YuPaJi2RLvihNWDcpnOY47p1x9Qb+0s5ATnmDLK1vMQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LlfudJGu6RyYkyjE8qgGwF7rZDq7d1kiSy/C//sW9g7LX89WCD0WS9fClUAitFnOvFiS5Dh2ZRFNUgZeFknJ3bC4J0v+JhzdfGdLocUG88ulyDCAB0qUQNBNTsl6C14Hrys7D8kGwXLOobdLqN8Znx+ruv02l9waHsYvDNzCoW4= 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=pZbPQ0mW; 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="pZbPQ0mW" 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 57LMaUOi984441 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Thu, 21 Aug 2025 15:37:00 -0700 DKIM-Filter: OpenDKIM Filter v2.11.0 mail.zytor.com 57LMaUOi984441 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zytor.com; s=2025072201; t=1755815820; bh=3f454+pbfQO3MGqeqFMS3Z46Rpq6wwbv1vlH2uO/rig=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pZbPQ0mWHaWkqNlA+lMLIk1dfRvER1d3g6itJxZUFUhWZ1GEJYbHif2ig3FI0k+3P VCYfS41eIJKtOhcFrdPVQV5GjOkdP6a09AEU4roxUh8iVY2Qm9EfwUPkOiR5dKNUDA +sUtfYfyv8+RHMrhJTcwa7hBqsIO2f4jt2kMc1X7HXbarRGL8aOjX65z3OLfB1Zw94 rOL5RD0srKdZ+W7XbiKzZwQ3ossLRNvatP+UgIxrGoEgACUFEws/5b8S/jXKDuEo9j Ba9KXCN5tc2Ws0ggYpBGn/QD1fL4zyhKgcEThzBXgZwYL/JJQJrNAu7o+9KTLcONyF A2jwRJCt4JGbA== 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 v6 20/20] KVM: nVMX: Allow VMX FRED controls Date: Thu, 21 Aug 2025 15:36:29 -0700 Message-ID: <20250821223630.984383-21-xin@zytor.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250821223630.984383-1-xin@zytor.com> References: <20250821223630.984383-1-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 Allow nVMX FRED controls as nested FRED support is in place. Signed-off-by: Xin Li Signed-off-by: Xin Li (Intel) Tested-by: Shan Kang Tested-by: Xuelian Guo --- Change in v5: * Add TB from Xuelian Guo. --- arch/x86/kvm/vmx/nested.c | 5 +++-- arch/x86/kvm/vmx/vmx.c | 1 + 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index 266115525b9e..0b266e95db60 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -7436,7 +7436,8 @@ static void nested_vmx_setup_exit_ctls(struct vmcs_co= nfig *vmcs_conf, * advertise any feature in it to nVMX until its nVMX support * is ready. */ - msrs->secondary_exit_ctls &=3D 0; + msrs->secondary_exit_ctls &=3D SECONDARY_VM_EXIT_SAVE_IA32_FRED | + SECONDARY_VM_EXIT_LOAD_IA32_FRED; } } =20 @@ -7452,7 +7453,7 @@ static void nested_vmx_setup_entry_ctls(struct vmcs_c= onfig *vmcs_conf, VM_ENTRY_IA32E_MODE | #endif VM_ENTRY_LOAD_IA32_PAT | VM_ENTRY_LOAD_BNDCFGS | - VM_ENTRY_LOAD_CET_STATE; + VM_ENTRY_LOAD_CET_STATE | VM_ENTRY_LOAD_IA32_FRED; msrs->entry_ctls_high |=3D (VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR | VM_ENTRY_LOAD_IA32_EFER | VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL); diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index ac76cb33f3de..99106750b1e3 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -7957,6 +7957,7 @@ static void nested_vmx_cr_fixed1_bits_update(struct k= vm_vcpu *vcpu) =20 entry =3D kvm_find_cpuid_entry_index(vcpu, 0x7, 1); cr4_fixed1_update(X86_CR4_LAM_SUP, eax, feature_bit(LAM)); + cr4_fixed1_update(X86_CR4_FRED, eax, feature_bit(FRED)); =20 #undef cr4_fixed1_update } --=20 2.50.1