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mx.microsoft.com 1; spf=pass smtp.mailfrom=suse.com; dmarc=pass action=none header.from=suse.com; dkim=pass header.d=suse.com; arc=none Authentication-Results: xen.org; dkim=none (message not signed) header.d=none;xen.org; dmarc=none action=none header.from=suse.com; Subject: [PATCH 15/17] IOMMU: page table dumping adjustments From: Jan Beulich To: "xen-devel@lists.xenproject.org" Cc: Andrew Cooper , Paul Durrant References: Message-ID: Date: Tue, 24 Aug 2021 16:26:44 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0 In-Reply-To: Content-Language: en-US Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: AM9P250CA0020.EURP250.PROD.OUTLOOK.COM (2603:10a6:20b:21c::25) To AM0PR04MB5587.eurprd04.prod.outlook.com (2603:10a6:208:125::12) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: d6246664-69e8-4465-ca4a-08d9670b3406 X-MS-TrafficTypeDiagnostic: AM0PR04MB5586: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:9508; 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charset="utf-8" For one none of the three IOMMU implementations on Arm specify a dumping hook. Generalize VT-d's "don't dump shared page tables" to cover for this. Further in the past I was told that on Arm in principle there could be multiple different IOMMUs, and hence different domains' platform_ops pointers could differ. Use each domain's ops for calling the dump hook. (In the long run all uses of iommu_get_ops() would likely need to disappear for this reason.) Signed-off-by: Jan Beulich Reviewed-by: Kevin Tian --- a/xen/drivers/passthrough/iommu.c +++ b/xen/drivers/passthrough/iommu.c @@ -640,12 +640,9 @@ bool_t iommu_has_feature(struct domain * static void iommu_dump_page_tables(unsigned char key) { struct domain *d; - const struct iommu_ops *ops; =20 ASSERT(iommu_enabled); =20 - ops =3D iommu_get_ops(); - rcu_read_lock(&domlist_read_lock); =20 for_each_domain(d) @@ -653,7 +650,13 @@ static void iommu_dump_page_tables(unsig if ( is_hardware_domain(d) || !is_iommu_enabled(d) ) continue; =20 - ops->dump_page_tables(d); + if ( iommu_use_hap_pt(d) ) + { + printk("%pd sharing page tables\n", d); + continue; + } + + dom_iommu(d)->platform_ops->dump_page_tables(d); } =20 rcu_read_unlock(&domlist_read_lock); --- a/xen/drivers/passthrough/vtd/iommu.c +++ b/xen/drivers/passthrough/vtd/iommu.c @@ -2835,12 +2835,6 @@ static void vtd_dump_page_tables(struct { const struct domain_iommu *hd =3D dom_iommu(d); =20 - if ( iommu_use_hap_pt(d) ) - { - printk(VTDPREFIX " %pd sharing EPT table\n", d); - return; - } - printk(VTDPREFIX" %pd table has %d levels\n", d, agaw_to_level(hd->arch.vtd.agaw)); vtd_dump_page_table_level(hd->arch.vtd.pgd_maddr,