From nobody Sun Dec 14 12:16:11 2025 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 CB61121CC4F for ; Fri, 23 May 2025 01:00:21 +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=1747962023; cv=none; b=beNJ/VXwWonyZxDU+uR4jMo0gkOrpjjKHnjjcOhAj5YBGvooWH3sfYiDokhQDE4ro0aNfCWvG3aFEIhB5ZOLQv2Wx2N2PBLLOx/Y8DN+o2fU9GP0CPINPYLz5Fn9AwCTY5KLtD/jfuCkg2/qHm99ZBSoYL08t/0NIaGBJi6vI2M= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747962023; c=relaxed/simple; bh=aNmoBC5BL5ItcJ/WDwb3zDPcOis7QcSa1BwF4a2ekgY=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=BRjg1uPKB4g+EiX35/jYHZCdUn53tEhMAzO9yzG+nIg7w4lxKHDLtb/n2bKHFe+3PAjzR2Tj60dZGRRXjne4MBMlHifi5oMrPNkF0mHBUnYY0+PENhQOrVF/tiQVvUJZp7wY5hXRTQGEfGgVAwD9Bc9WerrgxyzQqZ7NzBLSL/A= 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=xwQ68Jkg; 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="xwQ68Jkg" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-3108d5123c4so2086588a91.1 for ; Thu, 22 May 2025 18:00:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1747962021; x=1748566821; 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=RwZHc1ywJBDFGfINHhpI7dwV0ed9uFhVGKRmUUyRiuk=; b=xwQ68Jkg2qRiwtI/W7HJPLIhVJ0RpJCnhYlTA4uRnMzAYgqlEPF2ybXPo7y72Q4I/4 vNlT5aDtovCt5V4RAwjpkSaIB/3HAHP/Fn79a3AprySugLqBZm1EuM8qd2vUpub33ZqM DEx03IS9L2rDvRu7aA7CEpOdZg1JtRAWAenZqRst1FRf3OXAMwB6WGY07ZKSlVGdoWz3 bqx3cG49UGvhWJHpfd3WcPAxcbD4qMf1lyEJhz47a+MRu9JhtQ9WuYT+lTZuOBHfaSdj 0PgC+Ht8j3XUBNWh7zO0ltKBhTos6WLOzPQWYxS5puiAxPFcO+EFOnhYWwLP4EWh6rQm hOgg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1747962021; x=1748566821; 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=RwZHc1ywJBDFGfINHhpI7dwV0ed9uFhVGKRmUUyRiuk=; b=c1Z4Oam5WFjmbxkH1aX9FcU/WvY3n+DHcSo+DVtZqQFJKAvwQpPMUqpncdUV6aq3fR hloYlnrcDOrfMZtZmLSn0sZoOI2+0v0hzdGd0jIu2fSe0Rx/k95ID7Hs4OeM9pu1fj7P yOFzzGnEdbttYynmEV4oS0BrHiOPgEDhqMBF7UPneqnN9HS0qEI8EMUaO7ICPS6VUzoD W5T0pI2Pem+nuzwjbNJWRw86x6Olwk9QDJAylwz2XLF1q+hw8aEJnjT9wCdeakB9GgmJ lMZ42GXvaw+4zj6A2PU9MB3zzj4dRDGUjCDgsoGAhfZfDheOZKjEBzibMXMuQjpY6ome UhIw== X-Forwarded-Encrypted: i=1; AJvYcCW6GgdtWSFVaZRF8oSLXyHrbZ7yxXcIVpRBRgdU3sw8h6Vdli921PmsRMN8mTVOFUwbcEab0MGyol6HUIs=@vger.kernel.org X-Gm-Message-State: AOJu0YxoYeG+5LcsdqvZ9E65AoWrPDJ6TGZBgMYI6ZIE9pVInBANbiry kg0ANgyhja+Nz09O7RGkS+48PuxjyDa5dTn4r7+PQU0eEa+9IeoDJ+s1v0Nund8gn1LKmggodfq hM6ZdIA== X-Google-Smtp-Source: AGHT+IFArGigRbQ3xY6m7aPjNKtLLh8N+euULRawZd3DzF9QWqKL/5ofHFtPHZbDhE4jbFVVScTN2jPKnTM= X-Received: from pjbsg3.prod.google.com ([2002:a17:90b:5203:b0:301:1ea9:63b0]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:35ca:b0:2ee:f440:53ed with SMTP id 98e67ed59e1d1-30e83228de0mr33805240a91.31.1747962021097; Thu, 22 May 2025 18:00:21 -0700 (PDT) Reply-To: Sean Christopherson Date: Thu, 22 May 2025 17:59:11 -0700 In-Reply-To: <20250523010004.3240643-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250523010004.3240643-1-seanjc@google.com> X-Mailer: git-send-email 2.49.0.1151.ga128411c76-goog Message-ID: <20250523010004.3240643-7-seanjc@google.com> Subject: [PATCH v2 06/59] KVM: SVM: Drop pointless masking of default APIC base when setting V_APIC_BAR From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini , Joerg Roedel , David Woodhouse , Lu Baolu Cc: kvm@vger.kernel.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, Sairaj Kodilkar , Vasant Hegde , Maxim Levitsky , Joao Martins , Francesco Lavra , David Matlack Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Drop VMCB_AVIC_APIC_BAR_MASK, it's just a regurgitation of the maximum theoretical 4KiB-aligned physical address, i.e. is not novel in any way, and its only usage is to mask the default APIC base, which is 4KiB aligned and (obviously) a legal physical address. No functional change intended. Tested-by: Sairaj Kodilkar Signed-off-by: Sean Christopherson --- arch/x86/include/asm/svm.h | 2 -- arch/x86/kvm/svm/avic.c | 2 +- 2 files changed, 1 insertion(+), 3 deletions(-) diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h index ad954a1a6656..89a666952b01 100644 --- a/arch/x86/include/asm/svm.h +++ b/arch/x86/include/asm/svm.h @@ -260,8 +260,6 @@ struct __attribute__ ((__packed__)) vmcb_control_area { =20 #define AVIC_DOORBELL_PHYSICAL_ID_MASK GENMASK_ULL(11, 0) =20 -#define VMCB_AVIC_APIC_BAR_MASK 0xFFFFFFFFFF000ULL - #define AVIC_UNACCEL_ACCESS_WRITE_MASK 1 #define AVIC_UNACCEL_ACCESS_OFFSET_MASK 0xFF0 #define AVIC_UNACCEL_ACCESS_VECTOR_MASK 0xFFFFFFFF diff --git a/arch/x86/kvm/svm/avic.c b/arch/x86/kvm/svm/avic.c index c981ce764b45..5344ae76c590 100644 --- a/arch/x86/kvm/svm/avic.c +++ b/arch/x86/kvm/svm/avic.c @@ -244,7 +244,7 @@ void avic_init_vmcb(struct vcpu_svm *svm, struct vmcb *= vmcb) vmcb->control.avic_backing_page =3D bpa & AVIC_HPA_MASK; vmcb->control.avic_logical_id =3D lpa & AVIC_HPA_MASK; vmcb->control.avic_physical_id =3D ppa & AVIC_HPA_MASK; - vmcb->control.avic_vapic_bar =3D APIC_DEFAULT_PHYS_BASE & VMCB_AVIC_APIC_= BAR_MASK; + vmcb->control.avic_vapic_bar =3D APIC_DEFAULT_PHYS_BASE; =20 if (kvm_apicv_activated(svm->vcpu.kvm)) avic_activate_vmcb(svm); --=20 2.49.0.1151.ga128411c76-goog