From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f197.google.com (mail-pl1-f197.google.com [209.85.214.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 92AC025B099 for ; Wed, 30 Sep 2026 00:21:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790727703; cv=none; b=mtoteetvGnGNn3NpSQwhMqKHvcY6ANPxLiiaG9TWTlgZCD3dVYRbZD4l9hUTVeLIe/mJ97KQTKtLUJd1EivCW9WH+xHLU2wo1eFfqC1XPi6zO4MayoDPWFrFqAk3wnC90ZEmS3gWU3JU22eheIm7JPz48E9ERyibmsRxR/WKNKU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790727703; c=relaxed/simple; bh=OagveM/W6LfZWuRscEmjyJr+E18dnGlC36iBiLWROL0=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=P3Lriz8v2dsfHS1gnKVJQWJiVQn28mzIh0oD2enuxVIoiDnc8INFUJTES2fWoEtfuOcgCNXtE11PyacNEuw2UDDrpasBDc6tKHbn3qr+Eoz/UnItqkdmyzDAPGSYV11ZrOEOaKhMU5mD5UVe/T3IwoVcJklgE9JvtzcM5fE1DIk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=ihvigAmt; arc=none smtp.client-ip=209.85.214.197 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="ihvigAmt" Received: by mail-pl1-f197.google.com with SMTP id d9443c01a7336-2d94a158dc8so67537245ad.2 for ; Tue, 29 Sep 2026 17:21:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1790727702; x=1791332502; darn=vger.kernel.org; h=content-type:cc:to:from:subject:message-id:mime-version:date :reply-to:from:to:cc:subject:date:message-id:reply-to:content-type; bh=AwL/o5XM+JpBzX0u1GI0Q4//KknXm6NLO9rIpXPH8Zg=; b=ihvigAmtTVNnn3XUsZ0Oc/43v21tAAsHcDHOh4DRNNY36EBO4XX72doW4Mk99KXFgG Hwpih+WC95eRxvrbhJszlhgP+U/Su7GNpYR0EBZmoVqqOrC0u7ipzsHgOCds+Ljb1aI4 rip2Hf11SonN7UPbIe9VmTmskloSeNNMWmpuatZWgQgE/dVUNeY/SfIoP9ZRAjRfeB1O DTgj41CMufysDw+XAVcaF2aXWjT2Sh9uTGKFRqjooEUMn7vvqcqBWVBX57IXgojoEwP5 sYjB4n4mDH2Py9GEmX/3hSKQzuU6j9Gg00Z/nBB3DftWaoZ3YsH/gVb8dnwKLHsn6DKS 1CPg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1790727702; x=1791332502; h=content-type:cc:to:from:subject:message-id:mime-version:date :reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to:content-type; bh=AwL/o5XM+JpBzX0u1GI0Q4//KknXm6NLO9rIpXPH8Zg=; b=qU8mOPqCGWmn52uDgyPYbF+DFw7piFvpZRAcBRmekZ6mtL2FhD+0RNFjXP78PXReKU DfBW/DLQ6InlPiEFATYeJdYSUAS/NX1vfAMOPn5aml3dGW4w7Ty6kMO2pf1hinxnX/oP tMHjeuWi0XifzudJoydg3YI4Ac2FeiR1B7ZXCnvNUZbpamexYepY+PTo58twD6jQTiIN X4eozxQ8B+dVIS1IYtRyIG60pRVMSPn2ACCN5YC/rqqUQKe1WdKao9KhS0h2kWTu2QQ+ lMIA/SLqkh4YueT/4S9CgdSks4UZ87DsU82XSkerZaBtAY1+sF3qyH3jcBpzytAYrwph r/Bg== X-Forwarded-Encrypted: i=1; AKwUvBwuDtmfEQ4AUKNy+gr6SZsigbXgbdntm7SuZoZGMJrKn6renh+/CUfWFmOt0DHMTLFMtB83afQY5RdE4do=@vger.kernel.org X-Gm-Message-State: AFq9FYJNqo/Qz+zsplNA8XtmnxJLLJ2ARemh6syNoeWKV2CSaeD1kC87 UXhoG/Du+e6gtdkA1ip4PKocfiea3XWeo1ahgzPUmCG0eA9DtcS6J1jz3s2BeQvbOMjQtbl4fNj Aqt1hog== X-Received: from plbjj8.prod.google.com ([2002:a17:903:488:b0:2dd:b898:adf9]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:902:db07:b0:2df:b488:ce8a with SMTP id d9443c01a7336-2e2de4ffaebmr5685505ad.11.1790727701776; Tue, 29 Sep 2026 17:21:41 -0700 (PDT) Reply-To: Sean Christopherson Date: Tue, 29 Sep 2026 17:21:35 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.56.0.rc1.315.gc6ed9934b7-goog Message-ID: <20260930002140.3174449-1-seanjc@google.com> Subject: [PATCH v3 0/5] KVM: x86: Honor EFER_LMSLE_MBZ From: Sean Christopherson To: Paolo Bonzini , Sean Christopherson Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Jim Mattson Content-Type: text/plain; charset="UTF-8" Jim's series to try to clean up the EFER.LMSLE_MBZ mess (and what a mess it is). I didn't touch the KVM patches, and barely touched the selftests, i.e. Jim's testing from v2 should still hold. v3: Slot in a patch to add kvm_is_nested_virtualization_enabled() instead of open coding the check and relying on the X86_FEATURE_SVM cheak to make sure it's kvm_amd.ko under the hood (the patch is constructed so that it will trigger a noisy conflict with the in-flight host_cpu_is_intel_compatible). v2: https://lore.kernel.org/all/cover.1790208413.git.jmattson@google.com v1: https://lore.kernel.org/all/20260918154530.4129698-1-jmattson@google.com Jim Mattson (4): KVM: x86: Advertise EFER_LMSLE_MBZ when KVM disallows EFER.LMSLE KVM: x86: Honor the guest's EFER_LMSLE_MBZ KVM: selftests: Rename svm_nested_clear_efer_svme to svm_nested_efer_test KVM: selftests: Add coverage for the EFER_LMSLE_MBZ defeature Sean Christopherson (1): KVM: selftests: Add module param API to check if nested virtualization is enabled Documentation/virt/kvm/api.rst | 25 ++ arch/x86/kvm/cpuid.c | 20 ++ arch/x86/kvm/msrs.c | 12 +- arch/x86/kvm/svm/svm.c | 21 +- arch/x86/kvm/vmx/vmx.c | 7 + arch/x86/kvm/x86.c | 9 +- tools/testing/selftests/kvm/Makefile.kvm | 2 +- .../selftests/kvm/include/x86/processor.h | 32 ++- .../kvm/x86/svm_nested_clear_efer_svme.c | 50 ---- .../selftests/kvm/x86/svm_nested_efer_test.c | 266 ++++++++++++++++++ 10 files changed, 386 insertions(+), 58 deletions(-) delete mode 100644 tools/testing/selftests/kvm/x86/svm_nested_clear_efer_svme.c create mode 100644 tools/testing/selftests/kvm/x86/svm_nested_efer_test.c base-commit: d4b7fb647204f0c81dfeae2d1a708e4d858e0c94 -- 2.56.0.rc1.315.gc6ed9934b7-goog