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 A8D1223D7CE for ; Wed, 3 Jun 2026 23:07:20 +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=1780528042; cv=none; b=Ykbnisb7RrmNle/ktJETZYCsRTvFfFbTwqvwBZA8y6MNAOh0hvzfm8hd7+mGzOs+AOBCd8YQZLDX8/EWBPr53y5pTLnHJf3eNmDXUFroi9cXbTetEDgkV/1rT9Omaf/Bs6roMVEevZ1Zgz9kcZCSMdD40V5Kv6lzW8BdzkzRbnA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780528042; c=relaxed/simple; bh=dv0W6/7mKtoUuSzLZzK6PX7bKgTqjgzZlkJHnx6M0e8=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=jkq3v1Q+2YOfnV39Mly6Ts4DtVsbaSh+9ckB05JouQzVl4ZmDPKi0Hs1r6nvX1sixTrblySgF5sN5Q4SEOUmXKCl/U49fKDCxf+cWRQMs6nXzxOoSA/vNjGZIcSHz1XpxrCP8CuHOOv3dOsUIlW7sR7JIfC2ufs3qyjrtkh1FhQ= 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=U4v+8PQU; 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="U4v+8PQU" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-36b9106b0fbso840022a91.0 for ; Wed, 03 Jun 2026 16:07:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1780528040; x=1781132840; darn=vger.kernel.org; h=content-transfer-encoding:cc:to:from:subject:message-id :mime-version:date:reply-to:from:to:cc:subject:date:message-id :reply-to; bh=+Q/oKHzjo8CamEORK7vKcc0VNuVsIBynECmHK3W1QOE=; b=U4v+8PQUP55BPH79qVXxj4aCh3iBxGZPUuJGeJRfkZ1B5nFuXt6lExA1UG1j88A8WV dA+jxsW/w4U4Lc9VAcUvrLJGMHmXmRLE316ijJonkCy42WozayHJDg7kVazVfHIXLzy+ 6VZXkZNqGuf0yD0dh4CGiTPzGS3Qxss0U9+bjYnWpPv1LuAF7DJzv12MY2jSpx4A3Sv6 pRCty/821KiOCJdpYL9VWw02g2BMyHxSRQwZgoRBEFrpmLt4r7e6m/h/VgeDlNR+peGt 3a7+P/UABNWz+cgjGbEj5eLGlW2idEouw2IbY2QANpdFdFiLaB3F3+Hgg0Td2QLWkHIf vWUQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780528040; x=1781132840; h=content-transfer-encoding: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=+Q/oKHzjo8CamEORK7vKcc0VNuVsIBynECmHK3W1QOE=; b=guSlnG2aUpp87db9eYpHt5qkMEAYmnvzG3/LUsZQSt4sorJ1sF3IxnrFozwfFYSO1C pi2CuYftuDtoyTypUR4v81w0eGTAT5MpH1eQ5tnyZbGNGnO4cT39CWku5R6TdcslDy0f lmeoX6XqpilMHjWW9CooMgo0r3hiycGlNnbqOhL89AUI4GG7zOI7V4+5+ARw2wsf7D7y GCYrLXQJNdvT6IYhpS3YwO8FE5X83c47FZOnO2Q2JniIzE84uTnWLSopUlSt5wRvWBTR N4Kspg7WL+QnIPwEAXb9p22iF5dj9wRFKUCQTG0349mCBCWGLbDPEixjXUTkGuC+sWB7 Dnwg== X-Forwarded-Encrypted: i=1; AFNElJ8czvLzCNqHzG/MeAvKG29wa7xyLqFkuGT1PAJRsoHSx8obkFm74OMpgzYrwpBefVzHa76RrQvvxiMdzoI=@vger.kernel.org X-Gm-Message-State: AOJu0YwyYgnlMakfhsmBn+W+C5eMT7aIes7Cb1zi5ytyW73HDZeNuy53 qBjMvojr6K/VM3B/i8cIho3Ghfi/UbpmcX9yqpKJXHT//ckeBSbrG7sWoLF2mwDRS9BhB/qdNgL SlcwybQ== X-Received: from pgjq16.prod.google.com ([2002:a63:e950:0:b0:c82:283f:132f]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6300:8d:b0:3b3:edf:9efc with SMTP id adf61e73a8af0-3b4b1fe8a61mr1043815637.21.1780528039727; Wed, 03 Jun 2026 16:07:19 -0700 (PDT) Reply-To: Sean Christopherson Date: Wed, 3 Jun 2026 16:07:12 -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 2.54.0.1032.g2f8565e1d1-goog Message-ID: <20260603230718.1733483-1-seanjc@google.com> Subject: [PATCH v2 0/6] KVM: x86: Fix emulated MOV DR{4,5} #GP bugs From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, "=?UTF-8?q?Carlos=20L=C3=B3pez?=" Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Carlos' fix for a bug where KVM fails to signal #GP on emulated MOV DR to DR4 or DR5, plus follow-up fixes priority goofs (#GP vs #DB, and #GP versus #VMEXIT on SVM). The rest are opportunistic cleanups. v1: https://lore.kernel.org/all/20260601133320.91479-2-clopez@suse.de Carlos L=C3=B3pez (1): KVM: x86: Treat any non-zero return from set_dr() as a faulting condition Sean Christopherson (5): KVM: x86: Prioritize DR7.GD #DB over #GP due to illegal DR6/7 value KVM: x86: Manually check DR4/5 write values to fix SVM intercept priority KVM: x86: Use kvm_dr{6,7}_valid() to check DR{4,5,6,7} write values in emulator KVM: x86: WARN if MOV DR emulation hits a "too late" #GP KVM: x86: Read CR4.DE in emulator if and only if accessing DR4 or DR5 arch/x86/kvm/emulate.c | 36 +++++++++++++++++++++++++++--------- 1 file changed, 27 insertions(+), 9 deletions(-) base-commit: d4bfaa66fa171089b9b9fb2dc17af9245f2b9b34 --=20 2.54.0.1032.g2f8565e1d1-goog