linux-kernel - [PATCH v2 11/17] iommu/arm-smmu-v3: Add s1dss in struct arm_smmu_s1

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: <84f013e02f50f24f00eac77c2b5c416c18fc5a2c.1683688960.git.nicolinc@nvidia.com>
Date:   Tue, 9 May 2023 20:33:31 -0700
From:   Nicolin Chen <nicolinc@...dia.com>
To:     <jgg@...dia.com>, <robin.murphy@....com>, <will@...nel.org>
CC:     <eric.auger@...hat.com>, <kevin.tian@...el.com>,
        <baolu.lu@...ux.intel.com>, <joro@...tes.org>,
        <shameerali.kolothum.thodi@...wei.com>, <jean-philippe@...aro.org>,
        <linux-arm-kernel@...ts.infradead.org>, <iommu@...ts.linux.dev>,
        <linux-kernel@...r.kernel.org>, <kvm@...r.kernel.org>,
        <alex.williamson@...hat.com>, <yi.l.liu@...el.com>
Subject: [PATCH v2 11/17] iommu/arm-smmu-v3: Add s1dss in struct arm_smmu_s1_cfg

The s1dss has been so far hardcoded with a value STRTAB_STE_1_S1DSS_SSID0
in the STE setup routine. Yet, with a nested STE support, it should setup
the value coming from the guest OS.

Add s1dss in struct arm_smmu_s1_cfg, and set to STRTAB_STE_1_S1DSS_SSID0
in arm_smmu_domain_finalise_s1(). It will be setup with the value from a
guest OS in a separate pathway for a nested use case.

Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
---
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 3 ++-
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

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 fd3ac4802907..8b827247f4b9 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -1346,7 +1346,7 @@ static void arm_smmu_write_strtab_ent(struct arm_smmu_master *master, u32 sid,
 
 		BUG_ON(ste_live);
 		dst[1] = cpu_to_le64(
-			 FIELD_PREP(STRTAB_STE_1_S1DSS, STRTAB_STE_1_S1DSS_SSID0) |
+			 FIELD_PREP(STRTAB_STE_1_S1DSS, s1_cfg->s1dss) |
 			 FIELD_PREP(STRTAB_STE_1_S1CIR, STRTAB_STE_1_S1C_CACHE_WBRA) |
 			 FIELD_PREP(STRTAB_STE_1_S1COR, STRTAB_STE_1_S1C_CACHE_WBRA) |
 			 FIELD_PREP(STRTAB_STE_1_S1CSH, ARM_SMMU_SH_ISH) |
@@ -2144,6 +2144,7 @@ static int arm_smmu_domain_finalise_s1(struct arm_smmu_domain *smmu_domain,
 		goto out_unlock;
 
 	cfg->s1cdmax = master->ssid_bits;
+	cfg->s1dss = STRTAB_STE_1_S1DSS_SSID0;
 
 	smmu_domain->stall_enabled = master->stall_enabled;
 
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
index 232a2dda5d24..6ed86883d52e 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
@@ -598,6 +598,7 @@ struct arm_smmu_s1_cfg {
 	struct arm_smmu_ctx_desc_cfg	cdcfg;
 	struct arm_smmu_ctx_desc	cd;
 	u8				s1fmt;
+	u8				s1dss;
 	u8				s1cdmax;
 };
 
-- 
2.40.1