From nobody Thu Nov 6 10:24:00 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1540339396402871.3019165346459; Tue, 23 Oct 2018 17:03:16 -0700 (PDT) Received: from localhost ([::1]:44842 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gF6dn-0005mI-7R for importer@patchew.org; Tue, 23 Oct 2018 20:03:15 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51756) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gF6JQ-0003MJ-Vf for qemu-devel@nongnu.org; Tue, 23 Oct 2018 19:42:20 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gF6JF-0008Fz-PN for qemu-devel@nongnu.org; Tue, 23 Oct 2018 19:42:12 -0400 Received: from [185.30.24.106] (port=13484 helo=hotspot.internet-for-guests.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gF6JE-0008As-BK for qemu-devel@nongnu.org; Tue, 23 Oct 2018 19:42:01 -0400 Received: from redhat.com (unknown [172.29.18.113]) by hotspot.internet-for-guests.com (Postfix) with SMTP id B5A20640301; Wed, 24 Oct 2018 00:41:31 +0100 (BST) Date: Tue, 23 Oct 2018 19:41:32 -0400 From: "Michael S. Tsirkin" To: qemu-devel@nongnu.org Message-ID: <20181023234112.188140-16-mst@redhat.com> References: <20181023234112.188140-1-mst@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20181023234112.188140-1-mst@redhat.com> X-Mailer: git-send-email 2.17.1.1206.gb667731e2e.dirty X-Mutt-Fcc: =sent X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 185.30.24.106 Subject: [Qemu-devel] [PULL 15/28] x86_iommu/amd: Enable Guest virtual APIC support X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , "Singh, Brijesh" , Eduardo Habkost , Tom Lendacky , Peter Xu , Igor Mammedov , Paolo Bonzini , Suravee Suthikulpanit , Richard Henderson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RDMRC_1 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: "Singh, Brijesh" Now that amd-iommu support interrupt remapping, enable the GASup in IVRS table and GASup in extended feature register to indicate that IOMMU support guest virtual APIC mode. GASup provides option to guest OS to make use of 128-bit IRTE. Note that the GAMSup is set to zero to indicate that amd-iommu does not support guest virtual APIC mode (aka AVIC) which would be used for the nested VMs. See Table 21 from IOMMU spec for interrupt virtualization controls Signed-off-by: Brijesh Singh Reviewed-by: Peter Xu Cc: Peter Xu Cc: "Michael S. Tsirkin" Cc: Paolo Bonzini Cc: Richard Henderson Cc: Eduardo Habkost Cc: Marcel Apfelbaum Cc: Tom Lendacky Cc: Suravee Suthikulpanit Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/i386/amd_iommu.h | 2 +- hw/i386/acpi-build.c | 3 ++- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/hw/i386/amd_iommu.h b/hw/i386/amd_iommu.h index 8061e9c49c..687fcd8521 100644 --- a/hw/i386/amd_iommu.h +++ b/hw/i386/amd_iommu.h @@ -176,7 +176,7 @@ /* extended feature support */ #define AMDVI_EXT_FEATURES (AMDVI_FEATURE_PREFETCH | AMDVI_FEATURE_PPR | \ AMDVI_FEATURE_IA | AMDVI_FEATURE_GT | AMDVI_FEATURE_HE | \ - AMDVI_GATS_MODE | AMDVI_HATS_MODE) + AMDVI_GATS_MODE | AMDVI_HATS_MODE | AMDVI_FEATURE_GA) =20 /* capabilities header */ #define AMDVI_CAPAB_FEATURES (AMDVI_CAPAB_FLAT_EXT | \ diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index 1ef396ddbb..236a20eaa8 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -2518,7 +2518,8 @@ build_amd_iommu(GArray *table_data, BIOSLinker *linke= r) build_append_int_noprefix(table_data, (48UL << 30) | /* HATS */ (48UL << 28) | /* GATS */ - (1UL << 2), /* GTSup */ + (1UL << 2) | /* GTSup */ + (1UL << 6), /* GASup */ 4); /* * Type 1 device entry reporting all devices --=20 MST