From nobody Tue Dec 2 01:36:14 2025 Received: from mail-pl1-f202.google.com (mail-pl1-f202.google.com [209.85.214.202]) (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 33265303C91 for ; Fri, 21 Nov 2025 22:34:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763764498; cv=none; b=s8OrD3n+ktD9Y9+QsHW38G0EWfCs2eIS4XOgV8bPxyzYDymcmo45keZmEemeyauSsis6FMOfuUEqYSoFrmZyaPKQd0UioQdHR4kISam2WYDjnJgjiBrw8lvJZKu3aa3ja2K4E/kmonedZ7Pp6xo4J1QbSmzse/CvnbrPKmFko9M= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763764498; c=relaxed/simple; bh=7Xe3qDH6ZKzsQpPuowUY9HUcV1Hk4sOsCTpbpwGJBT0=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=X526P43qeOtRN1lKeirArV3KUIrUGPySMecn1DOXs1o3jNl6BeZ9oPOeD7yxKtne4QPyrmrUNm7EKhNmSjd4zY9ScS7XdR+y9JZZCy13H0gTVNCbjKyUDJwc212NcCCi6U3Gpp/wdX6QWk957NqsI9GbTGUeyQoow+H0T9aoIuo= 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=TURhejT1; arc=none smtp.client-ip=209.85.214.202 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="TURhejT1" Received: by mail-pl1-f202.google.com with SMTP id d9443c01a7336-297f3710070so62395445ad.2 for ; Fri, 21 Nov 2025 14:34:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1763764492; x=1764369292; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=1mfMySPMjnmJsOaOUb/BM+KRAPsIyAYo55wsBBcQK4Q=; b=TURhejT1dvyi7bFcfoIg4SGIYf/svS9dS0ve13WBZBtR7K/nCel45Ckni8MCRtGiU1 jOQhsOt4xpDvjnibUthGDitnKOrYG1a1xZCUttPkuim+MzBlwthjW0synzOPE2Y8D8sl jWLj9xzy3f1QlQ7bI3o9POo/+HuhWhunBPxLab2DML+iHuSZl1WBOsmbngjgWld77ZT+ OB+iUvKih4nKPWKY37ju1NP81H96nV7oOR2XCNgRLu5VHDIpTNx5CBvaw0fhMmSlrqkN CP1Uw1iFOZCb2gp174xFAHTmDVtRHGA4PqbZ1/r46MiMhlQUlBox9ixp0Sp5EgpdKXs8 g99w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1763764492; x=1764369292; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=1mfMySPMjnmJsOaOUb/BM+KRAPsIyAYo55wsBBcQK4Q=; b=ZPbLRwAumLOOAmSH/nVaX163TC5ogBvfR8JRUn7U/8xhoDXBkR81lmTRUQQ8WIOSU7 OD5WgdAc60OSHkXtCcl+EqQJWrut7mDJFau5VR349vj0WlEeGtTluf9dYUrPtSybClT3 ryV5cbnbO0tpmWUK3EZgTgo2SmKSeaKwZStsq3DsMUZmzdnUDhVyrEYYqtUd3WE17dFp FpCKGVTybgd+pueIM4340ft49pR3Qj4h8G5FYvDGTXwo9noxhNeHUPdKSy5Ufz3i2fPZ pu26d0s5mz1LG281fb1GiVO9AtrMzzAyD0QSUCVspbw4UHg5KrKssOERxPd816CQek9J fYlA== X-Forwarded-Encrypted: i=1; AJvYcCVJp59/+7F0aeSdi3qUaWBJgkW2XSfkhw6J2fUBzDYhmLSsRl6MbxtUmwtjXVvS22MXf8sl6rJLaUvAHCE=@vger.kernel.org X-Gm-Message-State: AOJu0YxvTbG5UBwa+VZRoTFgJCi/SU3ufJk9HHiEyOahav5ngj7xi0FM UICvXSP2bMKGUJuY5D7wNPgy4A63S+zR5hQMdoIoyKyYhZoSuCSTvY+zxX0GlpF9RnCD6UwQ85b FFIvuoA== X-Google-Smtp-Source: AGHT+IFj9RuRV1UAsJsdC2BoWHM8pJJQOrksLgBpTc07xLXfaxVjVM2sIZK/7aS0zyKbjdcsJJO13/uH/RU= X-Received: from plot21.prod.google.com ([2002:a17:902:8c95:b0:298:321b:1fa8]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:902:f706:b0:297:c889:ba37 with SMTP id d9443c01a7336-29b6c6a4a1fmr45042745ad.41.1763764491941; Fri, 21 Nov 2025 14:34:51 -0800 (PST) Reply-To: Sean Christopherson Date: Fri, 21 Nov 2025 14:34:42 -0800 In-Reply-To: <20251121223444.355422-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20251121223444.355422-1-seanjc@google.com> X-Mailer: git-send-email 2.52.0.rc2.455.g230fcf2819-goog Message-ID: <20251121223444.355422-4-seanjc@google.com> Subject: [PATCH v3 3/5] KVM: nVMX: Precisely mark vAPIC and PID maps dirty when delivering nested PI From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Fred Griffoul Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Explicitly mark the vmcs12 vAPIC and PI descriptor pages as dirty when delivering a nested posted interrupt instead of marking all vmcs12 pages as dirty. This will allow marking the APIC access page (and any future vmcs12 pages) as dirty in nested_mark_vmcs12_pages_dirty() without over- dirtying in the nested PI case. Manually marking the vAPIC and PID pages as dirty also makes the flow a bit more self-documenting, e.g. it's not obvious at first glance that vmx->nested.pi_desc is actually a host kernel mapping of a vmcs12 page. No functional change intended. Signed-off-by: Sean Christopherson --- arch/x86/kvm/vmx/nested.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index d4ef33578747..d0cf99903971 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -4027,7 +4027,8 @@ static int vmx_complete_nested_posted_interrupt(struc= t kvm_vcpu *vcpu) } } =20 - nested_mark_vmcs12_pages_dirty(vcpu); + kvm_vcpu_map_mark_dirty(vcpu, &vmx->nested.virtual_apic_map); + kvm_vcpu_map_mark_dirty(vcpu, &vmx->nested.pi_desc_map); return 0; =20 mmio_needed: --=20 2.52.0.rc2.455.g230fcf2819-goog