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From: Eric Auger <eric.auger@redhat.com>
To: eric.auger.pro@gmail.com, eric.auger@redhat.com,
	iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
	kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu,
	will@kernel.org, joro@8bytes.org, maz@kernel.org,
	robin.murphy@arm.com, alex.williamson@redhat.com
Cc: jean-philippe@linaro.org, zhangfei.gao@linaro.org,
	zhangfei.gao@gmail.com, vivek.gautam@arm.com,
	shameerali.kolothum.thodi@huawei.com,
	jacob.jun.pan@linux.intel.com, yi.l.liu@intel.com,
	tn@semihalf.com, nicoleotsuka@gmail.com, yuzenghui@huawei.com
Subject: [PATCH v13 07/15] iommu/smmuv3: Allow stage 1 invalidation with unmanaged ASIDs
Date: Wed, 18 Nov 2020 12:21:43 +0100	[thread overview]
Message-ID: <20201118112151.25412-8-eric.auger@redhat.com> (raw)
In-Reply-To: <20201118112151.25412-1-eric.auger@redhat.com>

With nested stage support, soon we will need to invalidate
S1 contexts and ranges tagged with an unmanaged asid, this
latter being managed by the guest. So let's introduce 2 helpers
that allow to invalidate with externally managed ASIDs

Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 35 +++++++++++++++++----
 1 file changed, 29 insertions(+), 6 deletions(-)

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index 805acdc18a3a..fdecc9f17b36 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -1697,9 +1697,9 @@ static int arm_smmu_atc_inv_domain(struct arm_smmu_domain *smmu_domain,
 }
 
 /* IO_PGTABLE API */
-static void arm_smmu_tlb_inv_context(void *cookie)
+static void __arm_smmu_tlb_inv_context(struct arm_smmu_domain *smmu_domain,
+				       int ext_asid)
 {
-	struct arm_smmu_domain *smmu_domain = cookie;
 	struct arm_smmu_device *smmu = smmu_domain->smmu;
 	struct arm_smmu_cmdq_ent cmd;
 
@@ -1710,7 +1710,11 @@ static void arm_smmu_tlb_inv_context(void *cookie)
 	 * insertion to guarantee those are observed before the TLBI. Do be
 	 * careful, 007.
 	 */
-	if (smmu_domain->stage == ARM_SMMU_DOMAIN_S1) {
+	if (ext_asid >= 0) { /* guest stage 1 invalidation */
+		cmd.opcode	= CMDQ_OP_TLBI_NH_ASID;
+		cmd.tlbi.asid	= ext_asid;
+		cmd.tlbi.vmid	= smmu_domain->s2_cfg.vmid;
+	} else if (smmu_domain->stage == ARM_SMMU_DOMAIN_S1) {
 		arm_smmu_tlb_inv_asid(smmu, smmu_domain->s1_cfg.cd.asid);
 	} else {
 		cmd.opcode	= CMDQ_OP_TLBI_S12_VMALL;
@@ -1721,9 +1725,17 @@ static void arm_smmu_tlb_inv_context(void *cookie)
 	arm_smmu_atc_inv_domain(smmu_domain, 0, 0, 0);
 }
 
-static void arm_smmu_tlb_inv_range(unsigned long iova, size_t size,
+static void arm_smmu_tlb_inv_context(void *cookie)
+{
+	struct arm_smmu_domain *smmu_domain = cookie;
+
+	__arm_smmu_tlb_inv_context(smmu_domain, -1);
+}
+
+static void __arm_smmu_tlb_inv_range(unsigned long iova, size_t size,
 				   size_t granule, bool leaf,
-				   struct arm_smmu_domain *smmu_domain)
+				   struct arm_smmu_domain *smmu_domain,
+				   int ext_asid)
 {
 	struct arm_smmu_device *smmu = smmu_domain->smmu;
 	unsigned long start = iova, end = iova + size, num_pages = 0, tg = 0;
@@ -1738,7 +1750,11 @@ static void arm_smmu_tlb_inv_range(unsigned long iova, size_t size,
 	if (!size)
 		return;
 
-	if (smmu_domain->stage == ARM_SMMU_DOMAIN_S1) {
+	if (ext_asid >= 0) {  /* guest stage 1 invalidation */
+		cmd.opcode	= CMDQ_OP_TLBI_NH_VA;
+		cmd.tlbi.asid	= ext_asid;
+		cmd.tlbi.vmid	= smmu_domain->s2_cfg.vmid;
+	} else if (smmu_domain->stage == ARM_SMMU_DOMAIN_S1) {
 		cmd.opcode	= CMDQ_OP_TLBI_NH_VA;
 		cmd.tlbi.asid	= smmu_domain->s1_cfg.cd.asid;
 	} else {
@@ -1798,6 +1814,13 @@ static void arm_smmu_tlb_inv_range(unsigned long iova, size_t size,
 	arm_smmu_atc_inv_domain(smmu_domain, 0, start, size);
 }
 
+static void arm_smmu_tlb_inv_range(unsigned long iova, size_t size,
+				   size_t granule, bool leaf,
+				   struct arm_smmu_domain *smmu_domain)
+{
+	__arm_smmu_tlb_inv_range(iova, size, granule, leaf, smmu_domain, -1);
+}
+
 static void arm_smmu_tlb_inv_page_nosync(struct iommu_iotlb_gather *gather,
 					 unsigned long iova, size_t granule,
 					 void *cookie)
-- 
2.21.3


  parent reply	other threads:[~2020-11-18 11:23 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-18 11:21 [PATCH v13 00/15] SMMUv3 Nested Stage Setup (IOMMU part) Eric Auger
2020-11-18 11:21 ` [PATCH v13 01/15] iommu: Introduce attach/detach_pasid_table API Eric Auger
2020-11-18 16:19   ` Jacob Pan
2020-11-19 17:02     ` Auger Eric
2021-02-01 11:27   ` Keqian Zhu
2021-02-01 17:18     ` Auger Eric
2020-11-18 11:21 ` [PATCH v13 02/15] iommu: Introduce bind/unbind_guest_msi Eric Auger
2021-02-01 11:52   ` Keqian Zhu
2021-02-12  8:55     ` Auger Eric
2021-02-18  8:43       ` Keqian Zhu
2021-02-18 10:35         ` Auger Eric
2020-11-18 11:21 ` [PATCH v13 03/15] iommu/arm-smmu-v3: Maintain a SID->device structure Eric Auger
2021-02-01 12:26   ` Keqian Zhu
2021-02-01 15:15     ` Jean-Philippe Brucker
2021-02-02  6:39       ` Keqian Zhu
2021-02-01 17:19     ` Auger Eric
2021-02-02  7:20       ` Keqian Zhu
2020-11-18 11:21 ` [PATCH v13 04/15] iommu/smmuv3: Allow s1 and s2 configs to coexist Eric Auger
2021-02-01 12:35   ` Keqian Zhu
2020-11-18 11:21 ` [PATCH v13 05/15] iommu/smmuv3: Get prepared for nested stage support Eric Auger
2020-11-19  3:59   ` kernel test robot
     [not found]   ` <a40b90bd-6756-c8cc-b455-c093d16d35f5@huawei.com>
2020-12-03 13:01     ` Auger Eric
2020-12-03 13:23       ` Kunkun Jiang
2020-12-09 14:26   ` Shameerali Kolothum Thodi
2021-02-02  7:14   ` Keqian Zhu
2021-02-11 17:36     ` Auger Eric
2020-11-18 11:21 ` [PATCH v13 06/15] iommu/smmuv3: Implement attach/detach_pasid_table Eric Auger
2021-02-02  8:03   ` Keqian Zhu
2021-02-11 17:35     ` Auger Eric
2020-11-18 11:21 ` Eric Auger [this message]
2020-12-01 13:33   ` [PATCH v13 07/15] iommu/smmuv3: Allow stage 1 invalidation with unmanaged ASIDs Xingang Wang
2020-12-01 13:58     ` Auger Eric
2020-12-02 12:59       ` Wang Xingang
2020-12-03 18:42       ` Shameerali Kolothum Thodi
2020-12-04  9:53         ` Jean-Philippe Brucker
2020-12-04 10:20           ` Shameerali Kolothum Thodi
2020-12-04 10:23             ` Auger Eric
2021-01-14 16:58               ` Auger Eric
2021-01-14 17:09                 ` Shameerali Kolothum Thodi
2021-01-14 17:33                 ` Jean-Philippe Brucker
2021-01-14 18:00                   ` Auger Eric
2021-02-15 13:17         ` Auger Eric
2020-11-18 11:21 ` [PATCH v13 08/15] iommu/smmuv3: Implement cache_invalidate Eric Auger
2020-11-18 11:21 ` [PATCH v13 09/15] dma-iommu: Implement NESTED_MSI cookie Eric Auger
2020-11-18 11:21 ` [PATCH v13 10/15] iommu/smmuv3: Nested mode single MSI doorbell per domain enforcement Eric Auger
2020-11-18 11:21 ` [PATCH v13 11/15] iommu/smmuv3: Enforce incompatibility between nested mode and HW MSI regions Eric Auger
2020-11-18 11:21 ` [PATCH v13 12/15] iommu/smmuv3: Implement bind/unbind_guest_msi Eric Auger
2020-11-18 11:21 ` [PATCH v13 13/15] iommu/smmuv3: Report non recoverable faults Eric Auger
2020-11-18 11:21 ` [PATCH v13 14/15] iommu/smmuv3: Accept configs with more than one context descriptor Eric Auger
2020-11-18 11:21 ` [PATCH v13 15/15] iommu/smmuv3: Add PASID cache invalidation per PASID Eric Auger
2021-01-08 17:05 ` [PATCH v13 00/15] SMMUv3 Nested Stage Setup (IOMMU part) Shameerali Kolothum Thodi
2021-01-13 15:37   ` Auger Eric
2021-02-21 18:21   ` Auger Eric
2021-02-22  8:56     ` Shameerali Kolothum Thodi
2021-03-15 18:04 ` Krishna Reddy
2021-03-16  8:22   ` Auger Eric
2021-03-16 18:10     ` Krishna Reddy

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