diff options
| author | Jason Gunthorpe <jgg@nvidia.com> | 2024-10-30 21:20:55 -0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2024-11-12 14:11:03 -0400 |
| commit | f27298a82ba09a1c8aecee8a209b2a312beac672 (patch) | |
| tree | 1a9af9919e4ea1207dda19db18948ff28adcfd23 /drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | |
| parent | 67e4fe3985138325c9b21193be52266750616182 (diff) | |
iommu/arm-smmu-v3: Allow ATS for IOMMU_DOMAIN_NESTED
The EATS flag needs to flow through the vSTE and into the pSTE, and ensure
physical ATS is enabled on the PCI device.
The physical ATS state must match the VM's idea of EATS as we rely on the
VM to issue the ATS invalidation commands. Thus ATS must remain off at the
device until EATS on a nesting domain turns it on. Attaching a nesting
domain is the point where the invalidation responsibility transfers to
userspace.
Update the ATS logic to track EATS for nesting domains and flush the
ATC whenever the S2 nesting parent changes.
Link: https://patch.msgid.link/r/11-v4-9e99b76f3518+3a8-smmuv3_nesting_jgg@nvidia.com
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h')
| -rw-r--r-- | drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 4 |
1 files changed, 3 insertions, 1 deletions
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 5a025d310dbe..01c1d16dc0c8 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h @@ -305,7 +305,7 @@ static inline u32 arm_smmu_strtab_l2_idx(u32 sid) #define STRTAB_STE_1_NESTING_ALLOWED \ cpu_to_le64(STRTAB_STE_1_S1DSS | STRTAB_STE_1_S1CIR | \ STRTAB_STE_1_S1COR | STRTAB_STE_1_S1CSH | \ - STRTAB_STE_1_S1STALLD) + STRTAB_STE_1_S1STALLD | STRTAB_STE_1_EATS) /* * Context descriptors. @@ -837,6 +837,7 @@ struct arm_smmu_domain { struct arm_smmu_nested_domain { struct iommu_domain domain; struct arm_vsmmu *vsmmu; + bool enable_ats : 1; __le64 ste[2]; }; @@ -878,6 +879,7 @@ struct arm_smmu_master_domain { struct list_head devices_elm; struct arm_smmu_master *master; ioasid_t ssid; + bool nested_ats_flush : 1; }; static inline struct arm_smmu_domain *to_smmu_domain(struct iommu_domain *dom) |