linux-kernel - [RFC PATCH v1 5/8] iommu/arm-smmu-v3: Add arm_smmu_device as a parameter to domain

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20230818021629.RFC.v1.5.Ia591869e7a4b88af16a57e09c92df21599d3312c@changeid>
Date:   Fri, 18 Aug 2023 02:16:27 +0800
From:   Michael Shavit <mshavit@...gle.com>
To:     iommu@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Cc:     will@...nel.org, jgg@...dia.com, nicolinc@...dia.com,
        tina.zhang@...el.com, jean-philippe@...aro.org,
        robin.murphy@....com, Michael Shavit <mshavit@...gle.com>
Subject: [RFC PATCH v1 5/8] iommu/arm-smmu-v3: Add arm_smmu_device as a
 parameter to domain_finalise

Remove the usage of arm_smmu_domain->smmu in arm_smmu_domain_finalise to
prepare for the commit where a domain can be attached to multiple
masters.

Signed-off-by: Michael Shavit <mshavit@...gle.com>
---

 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 13 +++++++------
 1 file changed, 7 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 c0943cf3c09ca..208fec5fba462 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -2132,11 +2132,11 @@ static void arm_smmu_domain_free(struct iommu_domain *domain)
 }
 
 static int arm_smmu_domain_finalise_s1(struct arm_smmu_domain *smmu_domain,
+				       struct arm_smmu_device *smmu,
 				       struct io_pgtable_cfg *pgtbl_cfg)
 {
 	int ret;
 	u32 asid;
-	struct arm_smmu_device *smmu = smmu_domain->smmu;
 	struct arm_smmu_ctx_desc *cd = &smmu_domain->cd;
 	typeof(&pgtbl_cfg->arm_lpae_s1_cfg.tcr) tcr = &pgtbl_cfg->arm_lpae_s1_cfg.tcr;
 
@@ -2169,10 +2169,10 @@ static int arm_smmu_domain_finalise_s1(struct arm_smmu_domain *smmu_domain,
 }
 
 static int arm_smmu_domain_finalise_s2(struct arm_smmu_domain *smmu_domain,
+				       struct arm_smmu_device *smmu,
 				       struct io_pgtable_cfg *pgtbl_cfg)
 {
 	int vmid;
-	struct arm_smmu_device *smmu = smmu_domain->smmu;
 	struct arm_smmu_s2_cfg *cfg = &smmu_domain->s2_cfg;
 	typeof(&pgtbl_cfg->arm_lpae_s2_cfg.vtcr) vtcr;
 
@@ -2227,15 +2227,16 @@ static int arm_smmu_prepare_pgtbl_cfg(struct arm_smmu_device *smmu,
 	return 0;
 }
 
-static int arm_smmu_domain_finalise(struct iommu_domain *domain)
+static int arm_smmu_domain_finalise(struct iommu_domain *domain,
+				    struct arm_smmu_device *smmu)
 {
 	int ret;
 	enum io_pgtable_fmt fmt;
 	struct io_pgtable_ops *pgtbl_ops;
 	int (*finalise_stage_fn)(struct arm_smmu_domain *,
+				 struct arm_smmu_device *,
 				 struct io_pgtable_cfg *);
 	struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
-	struct arm_smmu_device *smmu = smmu_domain->smmu;
 	struct io_pgtable_cfg *pgtbl_cfg = &smmu_domain->pgtbl_cfg;
 
 	if (domain->type == IOMMU_DOMAIN_IDENTITY) {
@@ -2275,7 +2276,7 @@ static int arm_smmu_domain_finalise(struct iommu_domain *domain)
 	domain->geometry.aperture_end = (1UL << pgtbl_cfg->ias) - 1;
 	domain->geometry.force_aperture = true;
 
-	ret = finalise_stage_fn(smmu_domain, pgtbl_cfg);
+	ret = finalise_stage_fn(smmu_domain, smmu, pgtbl_cfg);
 	if (ret < 0) {
 		free_io_pgtable_ops(pgtbl_ops);
 		return ret;
@@ -2585,7 +2586,7 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
 
 	if (!smmu_domain->smmu) {
 		smmu_domain->smmu = smmu;
-		ret = arm_smmu_domain_finalise(domain);
+		ret = arm_smmu_domain_finalise(domain, smmu);
 		if (ret)
 			smmu_domain->smmu = NULL;
 	} else if (smmu_domain->smmu != smmu)
-- 
2.42.0.rc1.204.g551eb34607-goog