From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9C07CC87FC9 for ; Tue, 29 Jul 2025 09:23:12 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1uggXd-0006CW-I8; Tue, 29 Jul 2025 05:22:38 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uggWj-0004tg-56 for qemu-devel@nongnu.org; Tue, 29 Jul 2025 05:21:44 -0400 Received: from mgamail.intel.com ([192.198.163.17]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uggWg-0002cx-AK for qemu-devel@nongnu.org; Tue, 29 Jul 2025 05:21:40 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1753780898; x=1785316898; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=GUC4RzUWGM5tKjt/0JFvAk6Xt3JqGlvpzu1w06idpMk=; b=U2arzrCgN5JJfScWW/jJf/iGvcs2Qvl0S+klT10YZ00ODvgmp0zd9yaJ JkMl/5lo0RfinGuyp3ePuC1G0GtaA5kn+nLcmjqjgZh+HclPZtkny2g4E bEghp1KRetnm0Mml+pE1KfC/7V+RMdvluvUzEqMgzua+qQV04WiqUOH+2 eKPVTtKPy/etMticSf+8TKlF4ZppvBFdL6NQZvv0fGjyqII5gadWD3YGN MEU4VQzXHP0loVTUXxyT/Z2t9i2pxJaLE2tuSJZGPNkqzZX22g+i4gy0o nhQgJgWvRmXXm1fIwKUU4otaWv9G0g0xAdtddcuK0EUYAcgGEwyy92AoA w==; X-CSE-ConnectionGUID: 7wlvZJvpRqKW74CmBFDPVw== X-CSE-MsgGUID: C7gbUcSETyKlV7nHIJQG7Q== X-IronPort-AV: E=McAfee;i="6800,10657,11505"; a="55981927" X-IronPort-AV: E=Sophos;i="6.16,348,1744095600"; d="scan'208";a="55981927" Received: from orviesa007.jf.intel.com ([10.64.159.147]) by fmvoesa111.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Jul 2025 02:21:37 -0700 X-CSE-ConnectionGUID: IBAv/ouMQtuOz3ZZGKBKfQ== X-CSE-MsgGUID: DkbTSSJKRGqv1LiyHYSYFg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.16,348,1744095600"; d="scan'208";a="162691278" Received: from unknown (HELO gnr-sp-2s-612.sh.intel.com) ([10.112.230.229]) by orviesa007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Jul 2025 02:21:33 -0700 From: Zhenzhong Duan To: qemu-devel@nongnu.org Cc: alex.williamson@redhat.com, clg@redhat.com, eric.auger@redhat.com, mst@redhat.com, jasowang@redhat.com, peterx@redhat.com, ddutile@redhat.com, jgg@nvidia.com, nicolinc@nvidia.com, shameerali.kolothum.thodi@huawei.com, joao.m.martins@oracle.com, clement.mathieu--drif@eviden.com, kevin.tian@intel.com, yi.l.liu@intel.com, chao.p.peng@intel.com, Zhenzhong Duan Subject: [PATCH v4 09/20] intel_iommu: Introduce two helpers vtd_as_from/to_iommu_pasid_locked Date: Tue, 29 Jul 2025 05:20:31 -0400 Message-ID: <20250729092043.785836-10-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250729092043.785836-1-zhenzhong.duan@intel.com> References: <20250729092043.785836-1-zhenzhong.duan@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=192.198.163.17; envelope-from=zhenzhong.duan@intel.com; helo=mgamail.intel.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org PCI device supports two request types, Requests-without-PASID and Requests-with-PASID. Requests-without-PASID doesn't include a PASID TLP prefix, IOMMU fetches rid_pasid from context entry and use it as IOMMU's pasid to index pasid table. So we need to translate between PCI's pasid and IOMMU's pasid specially for Requests-without-PASID, e.g., PCI_NO_PASID(-1) <-> rid_pasid. For Requests-with-PASID, PCI's pasid and IOMMU's pasid are same value. vtd_as_from_iommu_pasid_locked() translates from BDF+iommu_pasid to vtd_as which contains PCI's pasid vtd_as->pasid. vtd_as_to_iommu_pasid_locked() translates from BDF+vtd_as->pasid to iommu_pasid. Signed-off-by: Zhenzhong Duan Reviewed-by: Eric Auger --- hw/i386/intel_iommu.c | 58 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index 1410ddd65e..eb0e799e4a 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -1602,6 +1602,64 @@ static int vtd_dev_to_context_entry(IntelIOMMUState *s, uint8_t bus_num, return 0; } +static int vtd_as_to_iommu_pasid_locked(VTDAddressSpace *vtd_as, + uint32_t *pasid) +{ + VTDContextCacheEntry *cc_entry = &vtd_as->context_cache_entry; + IntelIOMMUState *s = vtd_as->iommu_state; + uint8_t bus_num = pci_bus_num(vtd_as->bus); + uint8_t devfn = vtd_as->devfn; + VTDContextEntry ce; + int ret; + + /* For Requests-with-PASID, its pasid value is used by vIOMMU directly */ + if (vtd_as->pasid != PCI_NO_PASID) { + *pasid = vtd_as->pasid; + return 0; + } + + if (cc_entry->context_cache_gen == s->context_cache_gen) { + ce = cc_entry->context_entry; + } else { + ret = vtd_dev_to_context_entry(s, bus_num, devfn, &ce); + if (ret) { + return ret; + } + } + + *pasid = VTD_CE_GET_RID2PASID(&ce); + return 0; +} + +static gboolean vtd_find_as_by_sid_and_iommu_pasid(gpointer key, gpointer value, + gpointer user_data) +{ + VTDAddressSpace *vtd_as = (VTDAddressSpace *)value; + struct vtd_as_raw_key *target = (struct vtd_as_raw_key *)user_data; + uint16_t sid = PCI_BUILD_BDF(pci_bus_num(vtd_as->bus), vtd_as->devfn); + uint32_t pasid; + + if (vtd_as_to_iommu_pasid_locked(vtd_as, &pasid)) { + return false; + } + + return (pasid == target->pasid) && (sid == target->sid); +} + +/* Translate iommu pasid to vtd_as */ +static inline +VTDAddressSpace *vtd_as_from_iommu_pasid_locked(IntelIOMMUState *s, + uint16_t sid, uint32_t pasid) +{ + struct vtd_as_raw_key key = { + .sid = sid, + .pasid = pasid + }; + + return g_hash_table_find(s->vtd_address_spaces, + vtd_find_as_by_sid_and_iommu_pasid, &key); +} + static int vtd_sync_shadow_page_hook(const IOMMUTLBEvent *event, void *private) { -- 2.47.1