From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f202.google.com (mail-pf1-f202.google.com [209.85.210.202]) (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 EDA44369965 for ; Fri, 12 Jun 2026 23:58:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781308726; cv=none; b=KUY7034k9c4aQ1lo91LJ+FM0HirAfUf3P+BDg6m/La4FDTcm1wRScqcbrcK569o0r4tYJPpyjNGPaGdxwb1XinF1yLY9wa8UqSsZSTeyTdrXKSH38o99Q4Rp1eRGYQKj+OcEEbmtBySMEk4QxCP+L9UWTw5MRQW2lcBD+APnyj8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781308726; c=relaxed/simple; bh=PAO/ZdFHpG8p47uzDf0v9ZshqHFw00+CHAz03syre2s=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=KiT1uTonQgViFJloVdp4wl+QWxOpSo11omFNF9+4E0qX8s1qtq4m4vES5d088PiZQY3rnDyR6X9MVKPkApnWa0DdroL0vKKl0PE8UNRWyhDAOEFKM+hULJ0NMZJaWjfA+e5eoBQYmi9CvWLVLogAHs5lEWCGsv52o0uxBvHp6cc= 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=ete//sbB; arc=none smtp.client-ip=209.85.210.202 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="ete//sbB" Received: by mail-pf1-f202.google.com with SMTP id d2e1a72fcca58-8428384f31fso1174506b3a.3 for ; Fri, 12 Jun 2026 16:58:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1781308724; x=1781913524; 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=gk2NaAkgAd4F0bK8xaCGSvSSoNoqRgl1vb4vACV/z+A=; b=ete//sbBEoH2luI4TPH/DwQfreFOu18Li1sbkqnH2F8XNYWaRnIp9SLr8DFUOx+A8g uGzG5va28/PvazgMAn0Iw8BOS9WtmAbHU/6LjuAeCCP2Keh/4kN8qc1xuCWd+LMOLbAk SErIgs1U3f9nLgnaULXRMtaShPGdHZMyUyRbTxRskmQqlm366L3m9oqdBA0kg/nyB4gD taogDrUh/mkm5bB8TsXLxi2Q++lkoic2/rA0FuMXvW4QXlyxAS/t4p/BLCbd9yiSarg0 SyrrA++NJb6SBwcjgmjvkiA2+Ug78pDLzsr90N0wvfqh/LDU8emQ7EKDHsDUMLAeb2Jo RV6g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1781308724; x=1781913524; 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=gk2NaAkgAd4F0bK8xaCGSvSSoNoqRgl1vb4vACV/z+A=; b=DaNPKgJvuJEZa9kcoTVcVpiOCifPDxTLnesVGqmM64nodTccEH0/bkSmvZlDquB5C5 Nmmmu1cuo1azdDz2mOotEVt6reQnzgeYffx0vDiyw3RyyCWm6biCArJ0D99bL9DGpdqs DiGzpKgleFinXlu7W173n+nGqbfZVPc6S8uQMuEsR0eQj+hSuI0AFTplch9QdBFzRj8u ghZtxqQiAJ1pA460z/7vlim+hLm32ZhBBbvgnzTURjRnjkKf/V7C9yJ5FbD+NfbKHYcj ITznnsg764GNkC9Qo94Znyw5Qv5r9jNsnB/Y9eqwPUV593t20REfrOIXE4EOLONm7jtV WT9Q== X-Forwarded-Encrypted: i=1; AFNElJ8OmgX+W9IGNuo4VcxkUszd/QFH7UKDPeC3pWTF1Q9UV1ru07VOnWC7fuuQrnN+KRgi1Io=@vger.kernel.org X-Gm-Message-State: AOJu0YxH5TkGNn9MYj/bNGZ0ZnVChKbT3KskbwYRi3j9BFxA6GwgM3D6 GyoDfEatVsTfKvJtAygEyAl4IR7BmT52gFHNk/xrQnnP5MGelPr4ZesOUBItZEWT15I86aovtGA lpwPhxw== X-Received: from pfaf14.prod.google.com ([2002:a05:6a00:a11e:b0:842:37d7:2fef]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:2ea5:b0:82c:d7c4:4c5c with SMTP id d2e1a72fcca58-8434cd5cf1dmr5684595b3a.20.1781308724122; Fri, 12 Jun 2026 16:58:44 -0700 (PDT) Date: Fri, 12 Jun 2026 16:58:43 -0700 In-Reply-To: <20260612211003.2503400-1-jon@nutanix.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260612211003.2503400-1-jon@nutanix.com> Message-ID: Subject: Re: [PATCH 6.18.y] KVM: VMX: Update SVI during runtime APICv activation From: Sean Christopherson To: Jon Kohler Cc: Paolo Bonzini , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, jonmkohler@gmail.com, Dongli Zhang , Chao Gao , stable@vger.kernel.org, Gulshan Gabel Content-Type: text/plain; charset="us-ascii" On Fri, Jun 12, 2026, Jon Kohler wrote: > From: Dongli Zhang > > commit b2849bec936be642b5420801f902337f2507648e upstream. ... > Signed-off-by: Dongli Zhang > Reviewed-by: Chao Gao > Link: https://patch.msgid.link/20251110063212.34902-1-dongli.zhang@oracle.com > [sean: call out that SVM writes vmcb01 directly, tweak comment] > Link: https://patch.msgid.link/20251205231913.441872-2-seanjc@google.com > Signed-off-by: Sean Christopherson > (cherry picked from commit b2849bec936be642b5420801f902337f2507648e) > Cc: stable@vger.kernel.org # 6.6.x and above > Cc: Gulshan Gabel > Signed-off-by: Jon Kohler > --- > > This issue is pervasive and has been observed in production with QEMU > as the VMM. One scenario where this occurs is with Windows guests that > use the AutoEOI feature, which inhibits APICv > (APICV_INHIBIT_REASON_HYPERV). Gah, sorry, my bad. I don't know why I didn't tag this for stable@. Acked-by: Sean Christopherson