From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-183.mta0.migadu.com (out-183.mta0.migadu.com [91.218.175.183]) (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 4BFDB2DFF28 for ; Fri, 30 Jan 2026 02:08:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.183 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769738909; cv=none; b=lGL3F1SuBrfQnBCfCey6b90iciLfWpkyOOF1ShEtNQGMJ382ISxJu4OttrQsX0FxYMfJZcsLNXO/8yTbSK54NSxYNnibJgIfMaD+QWa3/CRD1WqgRkZKX3Mz6RmxEMqNlYPa4KY+BP2n4QOUy3o4w9K5y3CBRMyN9bzNYAkeRMM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769738909; c=relaxed/simple; bh=OgacTcHqVNPt77tiFMVqPpAcMafRFYIcKmffeSRE9Xo=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=knGboIuQ42ZC9OkJwpjtVu2LrEeF4LcK0YZgJ953pOZwNahjFMxmgRkRJxKAe4QRIKA2QCOS0q+BzVdbPHTmmk5rTlls8VAnGfTj1GwhH8KfoTWcmKGRQHejiBS/v159K8Maq9XI6LVOdP8QOpDBLGpfV230pebbG33cUwdv5CY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=FthNu7zV; arc=none smtp.client-ip=91.218.175.183 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="FthNu7zV" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1769738896; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=Rij+lw7784FhR4mnutSqr3sydrwUO+t7hZTEO5VM4VY=; b=FthNu7zV8sJwUCobwWZ5QGtsfxYu43ibM9Bwv0GLI9kJNC2f9Z1qU/zNJELS02/89jKze1 sBo+0iH62cIpTiVMWpsmFZlN0lqqfVZhF66faqFpt840hGfQr8/tE4lcHqeRa5IoF62Jz0 htBA/xY/ITD8d7bUwcnZ5lOuHqT1HCg= From: Yosry Ahmed To: Sean Christopherson Cc: Paolo Bonzini , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Yosry Ahmed Subject: [PATCH 0/3] KVM: nSVM: Stop tracking EFER.SVME in guest mode Date: Fri, 30 Jan 2026 02:07:32 +0000 Message-ID: <20260130020735.2517101-1-yosry.ahmed@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT Fix a bug (although not architecturally a bug) where KVM leaves guest mode and tears nested state if L2 clears EFER.SVME and L1 does not intercept it. Yosry Ahmed (3): KVM: SVM: Refactor EFER.SVME switching logic out of svm_set_efer() KVM: nSVM: Do not track EFER.SVME toggling in guest mode KVM: selftests: Add a test for L2 toggling EFER.SVME arch/x86/kvm/svm/svm.c | 79 ++++++++++++------- tools/testing/selftests/kvm/Makefile.kvm | 1 + .../kvm/x86/svm_nested_toggle_efer_svme.c | 76 ++++++++++++++++++ 3 files changed, 126 insertions(+), 30 deletions(-) create mode 100644 tools/testing/selftests/kvm/x86/svm_nested_toggle_efer_svme.c base-commit: 1a424e9e0616db91010f08e5985bcc6edc504205 -- 2.53.0.rc1.225.gd81095ad13-goog