From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yw1-f202.google.com (mail-yw1-f202.google.com [209.85.128.202]) (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 A7C3D1CEEA1 for ; Fri, 1 Nov 2024 19:21:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730488878; cv=none; b=IxYIv5Atyl1hrFst5j1qan2VD67NAkO2JLQl3rmwSaF7uYjzX28KgRtNIFLiklyVyDybmA/eOF7zerNg1ZcRarOD1yDWp6+xkob7hCkBgehd9ojT6SpYXHqqmAAGzmxEl5oHaO3/uTIZALgKKdrpzL8ZUMEfBV5pSFyYop9Scgc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730488878; c=relaxed/simple; bh=gDCwC1SPleUIBwKe9fTtquqbqUFzDDTJZqQXk2CUcQA=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=s6Y9uFDk950s9Sk4aTqMO5EDiuQZnno9baeykhIwD094x2kdsy9fenFvkfkLJ5G7WLQf6YXdX1BfEaX2eipR8fkEA18gRIYUqf89JvOxKHWheR2izqR4oz5tYNl8059k81PGaC3zpus+DHApD5VwLSf3QnuTetS+xYdnwkHoz4g= 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=XIXA/UZg; arc=none smtp.client-ip=209.85.128.202 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="XIXA/UZg" Received: by mail-yw1-f202.google.com with SMTP id 00721157ae682-6e6101877abso48129137b3.0 for ; Fri, 01 Nov 2024 12:21:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1730488876; x=1731093676; 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=gRx4ATohdQbBBEdds8jqGttW3H5chvC7bMcPq5abO9s=; b=XIXA/UZgiYmi/jxgsuPDVX9x1ek3jrxJCB4306y/LljpzgU4L7LHWCkZ9JWCGWOrTT T0AOHo00NGuIdY+pP3rCJt68rnQvKK/mW686qdBywmZa3/6P8sVhUl7ThnURDlgYtf0k NI4SUj0BX/Jl9nDg3dqt5mRif+XzMn7FHjj/6g/oEyWK97P1zJ+7zQZueklG1Abryjeh G+l4B4uo7tLTypVBB7tmb4PsLIjKkxn5LcbJYRNVHzPcCcSsMtGRxS/a7QNf87Jh5pOL 93D9jzsQqjAmkX0Ine8t+r7N6SIdleLq77LISMJpP/PvYnCYPIJQUl4/9paONi3D93b/ O28A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730488876; x=1731093676; 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=gRx4ATohdQbBBEdds8jqGttW3H5chvC7bMcPq5abO9s=; b=bRlCeGk9pNPHN/D1N6oydf3B/4YjMNjpLjneWTfQgxLh5TljyOL6qbdnCLk1On8YeN YR286Y3NzrvJDoFJr6LOlLcqU0yW5GdRPb2jPMEvL8+wETjU0AxV0rpiVO8UT056ghj3 8355DtkV9gCVoyCYObSHwHlVelQS3pB9NC8VWf4fNfp4dEjrYy6/Zzm3XipS6/e5kutK LKqg73OdWA200KbvmqkpTuwQGikdo54R4ByRpSQ4h5OHa4X4z4/awZKwkgclHK0tbpbI L+GosGX4Y3g7PyH2RWLII/nwJykUtfzD+I3WbBLuqqDyhXGP+E0VxrDKVHo1srVCJQ03 czlQ== X-Forwarded-Encrypted: i=1; AJvYcCUglU4p46g6Xx01o/R5oMN1xRlZ4pTbxD2iA0Y8NT4gM9JabMpAuTh4ztGhJZWV8n1r//uztWWcMt5D8+A=@vger.kernel.org X-Gm-Message-State: AOJu0Yy17Af9RWGquryt3cA0CdveBPiRPpNgsG5aeEYDF3l9SF2hfHhc ywFH+WUXKVVYQsiJosEtWlUh6Nft/16pBTh3lwtWr+LIsrzTbBlqoizPS0XILgI7wCq8ZSzoQGp uHQ== X-Google-Smtp-Source: AGHT+IHyeXiqfos8eUR1QXSm5Yxh076bg1NHvY90DfQOpetXU7pbsHu/DXBbVvfOG8iUCJwqIfmVk5H37TI= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:9d:3983:ac13:c240]) (user=seanjc job=sendgmr) by 2002:a05:690c:6f8e:b0:6e3:2bc1:da17 with SMTP id 00721157ae682-6ea64bc93a8mr525467b3.4.1730488875839; Fri, 01 Nov 2024 12:21:15 -0700 (PDT) Reply-To: Sean Christopherson Date: Fri, 1 Nov 2024 12:21:12 -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 2.47.0.163.g1226f6d8fa-goog Message-ID: <20241101192114.1810198-1-seanjc@google.com> Subject: [PATCH 0/2] KVM: nVMX: Fix an SVI update bug with passthrough APIC From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, "=?UTF-8?q?Markku=20Ahvenj=C3=A4rvi?=" , Janne Karhunen , Chao Gao Content-Type: text/plain; charset="UTF-8" Defer updating SVI (i.e. the VMCS's highest ISR cache) when L2 is active, but L1 has not enabled virtual interrupt delivery for L2, as an EOI that is emulated _by KVM_ in such a case acts on L1's ISR, i.e. vmcs01 needs to reflect the updated ISR when L1 is next run. Note, L1's ISR is also effectively L2's ISR in such a setup, but because virtual interrupt deliver is disable for L2, there's no need to update SVI in vmcs02, because it will never be used. Chao Gao (1): KVM: nVMX: Defer SVI update to vmcs01 on EOI when L2 is active w/o VID Sean Christopherson (1): KVM: x86: Plumb in the vCPU to kvm_x86_ops.hwapic_isr_update() arch/x86/include/asm/kvm_host.h | 2 +- arch/x86/kvm/lapic.c | 22 ++++++++++++++++------ arch/x86/kvm/lapic.h | 1 + arch/x86/kvm/vmx/nested.c | 5 +++++ arch/x86/kvm/vmx/vmx.c | 19 ++++++++++++++++++- arch/x86/kvm/vmx/vmx.h | 1 + arch/x86/kvm/vmx/x86_ops.h | 2 +- 7 files changed, 43 insertions(+), 9 deletions(-) base-commit: e466901b947d529f7b091a3b00b19d2bdee206ee -- 2.47.0.163.g1226f6d8fa-goog