From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (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 A2EDF78F4B for ; Sat, 15 Feb 2025 01:09:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739581791; cv=none; b=aGntE4C1CROySK/D2eTY4da+uL3OepQXnCB9ru3aMtPhCgfpSd7AUdKQCu8Pwq93WQ/XM1OCRD4IWxF0ltZugV5pKbtLUs43ne4ST9VnpGspMQVMrj1TDpQlOUAUGpy3VHAXHxN9M9hrU4KuXTrlGtWUq4SbcwitBtYzCwMy2yY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739581791; c=relaxed/simple; bh=5SqsxFyjoWcxFNf6Hg/LiMYgjTxlgCTtPvOJjWXlJU4=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=txc0SzItrYmwKHoOK/gvAESw+9nk3UcqrqbqYWUDhVfqFPBwkK1Ej7BcOjpfB6H2FDXFh7JSIC+cHt63J2Feqkj1nHm7tSJovtePw0RMCah7YcT2wNif/2rzX1VbVpez7fl7EGEM6V4DkTgJ71iDjKddh8PBVxAfmgCzYBU9dYw= 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=0VCz6vGf; arc=none smtp.client-ip=209.85.216.73 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="0VCz6vGf" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-2f46b7851fcso8411808a91.1 for ; Fri, 14 Feb 2025 17:09:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1739581789; x=1740186589; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:reply-to:from:to:cc :subject:date:message-id:reply-to; bh=ft9NGbA4u44DYHGMH78+t9Ma1QvHtYydU6iA2plJOxw=; b=0VCz6vGfF5kQjUNsBQcEq6tvV1exF5P2GnfZ0E5cQRUcWUtdl7so7voW8KacIsc6Vv 9QJQPOJQlno+dPKJx7x3XI800DWOsucr2PCtusVZH+QwWbEKyXUnH+q/NqQth7I5m1Lu NuPxD87Ma8qkQuBa7SscjqGztHwmT7MQRP9gxqBbntZZObMmpoKop32+ywgm5F6RXO5D 95Q9ZLtuzBe0yhJOceuf4a4dtLJsxY5tYExcqsT59iYmJICdnBaTUy+fA2MJKaK0/HIZ Yt69auBAo+tG6x3CTGcY4cVYhxDp8qpM+QxXXk9NqJ4I2M05dJJp0zQUPpE++j98ZSNi dDqg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1739581789; x=1740186589; h=cc:to:from:subject:message-id:mime-version:date:reply-to :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=ft9NGbA4u44DYHGMH78+t9Ma1QvHtYydU6iA2plJOxw=; b=gCQ2h+4LcHUAjpvBWimCf0tTKECdNSQZPEtA26EYMRKW5zkB3htMvFVo/7fy6BO8PU JMsucth9ynZc1GOvbCdyPyxP7R0sNH+ur7BBYBzD/x02T/wJV0tTUKe28NC5vze3OPMP Mr88tp0HYhs3zIXUl+g4EO2Z1VaNxos+2JO/u8z8DY9oVx3doyahFtW86MpVlun5AZr0 27/y4/TUwTuH0LsQeweHkTLWgB8QLA/pbOLH7wHc8tyhRvw02zuNgGKbzRCNweLNqJjL cHLGYJGTUlppcbH9k4y0dF24OFWySuO67/Xg8B6P3CRdSgD/qv0X1jj4LxXhZBlidilW pu7Q== X-Forwarded-Encrypted: i=1; AJvYcCW45/bcCfxwJAiuJGew79fyDkB85/naWRk+Sthhokc7nop/n72HHApyDD7hQuEv2eliLVhjWNp3xlVF81E=@vger.kernel.org X-Gm-Message-State: AOJu0Yy4x//fzrvFyaBxpjzI9KYhs2nKg+a/9VmBhngOzAnLqiLos/C/ UkoRXP1XtkkHdZ9tRo2e8qEBhnDN++VOk5UCQHEQyuAuAyAj74BbjEuVsPMhN2zofFcMxrAu5PX 7jQ== X-Google-Smtp-Source: AGHT+IGPReR8yPKp90g7iQv7Dwmt4gM4UA2F5Uz0fqd4eIZOb7XvKt0R/RDgOGVTmzaTTFl3g4BgUfRVtwE= X-Received: from pjl14.prod.google.com ([2002:a17:90b:2f8e:b0:2fb:fa85:1678]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:2789:b0:2ee:e945:5355 with SMTP id 98e67ed59e1d1-2fc40f21c9bmr1729152a91.19.1739581788933; Fri, 14 Feb 2025 17:09:48 -0800 (PST) Reply-To: Sean Christopherson Date: Fri, 14 Feb 2025 17:09:44 -0800 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 2.48.1.601.g30ceb7b040-goog Message-ID: <20250215010946.1201353-1-seanjc@google.com> Subject: [PATCH 0/2] KVM: SVM: Fix an STI shadow on VMRUN bug From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Doug Covelli Content-Type: text/plain; charset="UTF-8" Fix an amusing bug where KVM puts VMRUN in an STI shadow, which AMD CPUs bleed into guest state if a #VMEXIT occurs before completing the VMRUN, e.g. if vectoring an injected exception triggers an exit. Sean Christopherson (2): KVM: SVM: Set RFLAGS.IF=1 in C code, to get VMRUN out of the STI shadow KVM: selftests: Assert that STI blocking isn't set after event injection arch/x86/kvm/svm/svm.c | 14 ++++++++++++++ arch/x86/kvm/svm/vmenter.S | 10 +--------- .../selftests/kvm/x86/nested_exceptions_test.c | 2 ++ 3 files changed, 17 insertions(+), 9 deletions(-) base-commit: f0f0cbf3b767935abcfdb36649ab626fb2ab5ae7 -- 2.48.1.601.g30ceb7b040-goog