From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f201.google.com (mail-pg1-f201.google.com [209.85.215.201]) (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 391793EEAD7 for ; Thu, 28 May 2026 13:09:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779973743; cv=none; b=jp7KrzSxV2l4p+2X+9TaVTyttbjAiwwUU2HnX8iTjRYs6yEM99VS6n8hL5BITRcSRgHDiYidOQCjz1TadlgJwUXZfGs9+G6dHVeK/l4reJokBB3ctK3Hnf1Ay4iQ7MRnywjJoSTYy08Aj4g4hSt9qLYu+U2WlvsLzNk153m+rFc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779973743; c=relaxed/simple; bh=oBmK9WOIKlWbMEaKPBbTmm7YEGcIoyZ57guz/RjSxNU=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=kcPP4sqQ81HYIm02v8o9Yiz/gztHUMsYZCCAp/duHOkzkph97wDmv/HSFAK6e7EM++lfc2iiQM/EnscAlpyYUjCKPBf/XAnAPsrGE5aH67Bwff+rjYvg/83cCTLDY1597u9Q2k/FoOJSltSJgruObChuEU6lF9zYpuXGLBBLLG8= 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=KgRD/rwx; arc=none smtp.client-ip=209.85.215.201 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="KgRD/rwx" Received: by mail-pg1-f201.google.com with SMTP id 41be03b00d2f7-c827bda2e60so7506752a12.3 for ; Thu, 28 May 2026 06:09:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1779973741; x=1780578541; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=oBmK9WOIKlWbMEaKPBbTmm7YEGcIoyZ57guz/RjSxNU=; b=KgRD/rwx1figqoa3EHBtLBfq9cix6W5eBofIeaJ/3wr2KrrmdOoXNLFxghkOfmBvjf U7oW5zLmNkjj5vpwv3bXbQQlciJV/eW+5Zg9h0S+g2bq8vMDk5zsVg4rK7ZJGCRFdYda gjf9DNYAI8dafT1QMuLYPBmaeu6bN03/aaMfAAfJwwtQH32ZIr8a/F3dC2m3QglBilCv jZv3j8YGPAJv6VLnjmQBoCk0eFZMODTJULIqodaTj0/8T77Jxeuj0s7jJFIOze8lS5D/ 17f/qnOB1QqvEB17jiSxMniOZen8t+CZ2AqGznSdWj2Ci8uXf3JsyD2iqXRiFoxzdeJr v8VA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779973741; x=1780578541; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=oBmK9WOIKlWbMEaKPBbTmm7YEGcIoyZ57guz/RjSxNU=; b=LTTrvC229q8iMXH1ILv6aiuPqxgole0YxOm/89k3buXy2skTFKUufwr35QmabUwzuF U2b6qyPIPSGFlcXDo0nqYbemlQ8IMOchQC8SxS22XWHIrXWKLD0E09BVrE0EFVSNDVqa kMZZ3xTIBmzzeT721n3vcv6bu7n0gNO6sOUt3YjxvAAEm8q9qfqYHvHSU8avpmMFfLnG H8oZ6binyMUl/Uj4OJUkmK0XvoerK2fxEQl5d+jiD1DApxaIMDUyn78vwYkCDAk3OR/X qU5BMHduQiKYKIW3NLBbCQbkGLweWblqSWVEjX2XbFH5Z8EKqN4OnpSNvI2jDqNGZn1i n9Rw== X-Forwarded-Encrypted: i=1; AFNElJ/OsC8MdaNsZ6GKJqMxS1R1Rr4jT3YONXPcRfSrOr6am/xqYiuzlhs4Ui/kmIEOSux3+uU=@vger.kernel.org X-Gm-Message-State: AOJu0Yx1CVeg/rYsTpjPnCkIoRtUQtcXY6cC0+3NL2gCeh5XAv9HHPND dPHlPZOcCgfEwX/8XtHEbSLoAOJ4Ct6vEkjecHtm+MCHQI14mfiWCFCt+CUBMC9TwqGhWDluAFh 9zx008g== X-Received: from pgkn21.prod.google.com ([2002:a63:ee55:0:b0:c85:a9c:435f]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a21:6490:b0:39b:87f0:758e with SMTP id adf61e73a8af0-3b328c6ad42mr29658480637.8.1779973741256; Thu, 28 May 2026 06:09:01 -0700 (PDT) Date: Thu, 28 May 2026 06:09:00 -0700 In-Reply-To: Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260528113605.267111-1-jgross@suse.com> Message-ID: Subject: Re: [PATCH v2 0/6] KVM/x86: Drop "1" as MSR emulation return value From: Sean Christopherson To: Juergen Gross Cc: linux-kernel@vger.kernel.org, x86@kernel.org, kvm@vger.kernel.org, linux-coco@lists.linux.dev, Paolo Bonzini , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Vitaly Kuznetsov , Kiryl Shutsemau , Rick Edgecombe , David Woodhouse , Paul Durrant Content-Type: text/plain; charset="us-ascii" On Thu, May 28, 2026, Juergen Gross wrote: > Please disregard this series, there is one complication sashiko made me > aware of. Sashiko beat me to the punch. :-) See commit 2368048bf5c2 ("KVM: x86: Signal #GP, not -EPERM, on bad WRMSR(MCi_CTL/STATUS)") for a real world example of how things can and will go wrong.