| Message ID | 20240912130427.10119-5-yi.l.liu@intel.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Make set_dev_pasid op supporting domain replacement | expand |
On 9/12/24 9:04 PM, Yi Liu wrote: > @@ -4299,7 +4304,12 @@ domain_prepare_dev_pasid(struct iommu_domain *domain, > unsigned long flags; > int ret; > > - ret = prepare_domain_attach_device(domain, dev); > + /* Nested type domain should prepare its parent domain */ > + if (domain_type_is_nested(dmar_domain)) > + ret = prepare_domain_attach_device( > + &dmar_domain->s2_domain->domain, dev); > + else > + ret = prepare_domain_attach_device(domain, dev); > if (ret) > return ERR_PTR(ret); > 'prepare' is a bit confusing in this context. It actually means checking whether a domain is compatible with the hardware capabilities of RID or PASID. Or not? I know this confusion comes from the naming of prepare_domain_attach_device(). Hence, do you mind renaming this helper in a small patch? Thanks, baolu
On 2024/9/13 09:52, Baolu Lu wrote: > On 9/12/24 9:04 PM, Yi Liu wrote: >> @@ -4299,7 +4304,12 @@ domain_prepare_dev_pasid(struct iommu_domain *domain, >> unsigned long flags; >> int ret; >> - ret = prepare_domain_attach_device(domain, dev); >> + /* Nested type domain should prepare its parent domain */ >> + if (domain_type_is_nested(dmar_domain)) >> + ret = prepare_domain_attach_device( >> + &dmar_domain->s2_domain->domain, dev); >> + else >> + ret = prepare_domain_attach_device(domain, dev); >> if (ret) >> return ERR_PTR(ret); > > 'prepare' is a bit confusing in this context. It actually means checking > whether a domain is compatible with the hardware capabilities of RID or > PASID. Or not? > > I know this confusion comes from the naming of > prepare_domain_attach_device(). Hence, do you mind renaming this helper > in a small patch? good suggestion.
> From: Liu, Yi L <yi.l.liu@intel.com> > Sent: Thursday, September 12, 2024 9:04 PM > > From: Lu Baolu <baolu.lu@linux.intel.com> > > Extend intel_iommu_set_dev_pasid() to set a nested type domain to a PASID > of a device. > > Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> > Co-developed-by: Yi Liu <yi.l.liu@intel.com> > Signed-off-by: Yi Liu <yi.l.liu@intel.com> Reviewed-by: Kevin Tian <kevin.tian@intel.com>
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index 6f5a8e549f3f..749ee7741ec4 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -284,6 +284,11 @@ static int __init intel_iommu_setup(char *str) } __setup("intel_iommu=", intel_iommu_setup); +static int domain_type_is_nested(struct dmar_domain *domain) +{ + return domain->domain.type == IOMMU_DOMAIN_NESTED; +} + static int domain_pfn_supported(struct dmar_domain *domain, unsigned long pfn) { int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; @@ -4299,7 +4304,12 @@ domain_prepare_dev_pasid(struct iommu_domain *domain, unsigned long flags; int ret; - ret = prepare_domain_attach_device(domain, dev); + /* Nested type domain should prepare its parent domain */ + if (domain_type_is_nested(dmar_domain)) + ret = prepare_domain_attach_device( + &dmar_domain->s2_domain->domain, dev); + else + ret = prepare_domain_attach_device(domain, dev); if (ret) return ERR_PTR(ret); @@ -4329,9 +4339,9 @@ domain_prepare_dev_pasid(struct iommu_domain *domain, return ERR_PTR(ret); } -static int intel_iommu_set_dev_pasid(struct iommu_domain *domain, - struct device *dev, ioasid_t pasid, - struct iommu_domain *old) +int intel_iommu_set_dev_pasid(struct iommu_domain *domain, + struct device *dev, ioasid_t pasid, + struct iommu_domain *old) { struct device_domain_info *info = dev_iommu_priv_get(dev); struct dmar_domain *dmar_domain = to_dmar_domain(domain); @@ -4356,7 +4366,9 @@ static int intel_iommu_set_dev_pasid(struct iommu_domain *domain, intel_pasid_tear_down_entry(iommu, dev, pasid, INTEL_PASID_TEARDOWN_DRAIN_PRQ); - if (dmar_domain->use_first_level) + if (domain_type_is_nested(dmar_domain)) + ret = intel_pasid_setup_nested(iommu, dev, pasid, dmar_domain); + else if (dmar_domain->use_first_level) ret = domain_setup_first_level(iommu, dmar_domain, dev, pasid); else diff --git a/drivers/iommu/intel/iommu.h b/drivers/iommu/intel/iommu.h index b3b295e60626..36cf59bfe4ea 100644 --- a/drivers/iommu/intel/iommu.h +++ b/drivers/iommu/intel/iommu.h @@ -1109,6 +1109,9 @@ void device_block_translation(struct device *dev); int prepare_domain_attach_device(struct iommu_domain *domain, struct device *dev); void domain_update_iommu_cap(struct dmar_domain *domain); +int intel_iommu_set_dev_pasid(struct iommu_domain *domain, + struct device *dev, ioasid_t pasid, + struct iommu_domain *old); int dmar_ir_support(void); diff --git a/drivers/iommu/intel/nested.c b/drivers/iommu/intel/nested.c index 36a91b1b52be..c5a94c00b396 100644 --- a/drivers/iommu/intel/nested.c +++ b/drivers/iommu/intel/nested.c @@ -131,6 +131,7 @@ static int intel_nested_cache_invalidate_user(struct iommu_domain *domain, static const struct iommu_domain_ops intel_nested_domain_ops = { .attach_dev = intel_nested_attach_dev, + .set_dev_pasid = intel_iommu_set_dev_pasid, .free = intel_nested_domain_free, .cache_invalidate_user = intel_nested_cache_invalidate_user, };