iommu/vt-d: Drop s1_pgtbl from dmar_domain

dmar_domian has stored the s1_cfg which includes the s1_pgtbl info, so
no need to store s1_pgtbl, hence drop it.

Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20241025143339.2328991-1-yi.l.liu@intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

Author: yiliu1765

drivers/iommu/intel/iommu.h

@@ -653,8 +653,6 @@ struct dmar_domain {
 		struct {
 			/* parent page table which the user domain is nested on */
 			struct dmar_domain *s2_domain;
-			/* user page table pointer (in GPA) */
-			unsigned long s1_pgtbl;
 			/* page table attributes */
 			struct iommu_hwpt_vtd_s1 s1_cfg;
 			/* link to parent domain siblings */

drivers/iommu/intel/nested.c

@@ -162,7 +162,6 @@ struct iommu_domain *intel_nested_domain_alloc(struct iommu_domain *parent,
 
 	domain->use_first_level = true;
 	domain->s2_domain = s2_domain;
-	domain->s1_pgtbl = vtd.pgtbl_addr;
 	domain->s1_cfg = vtd;
 	domain->domain.ops = &intel_nested_domain_ops;
 	domain->domain.type = IOMMU_DOMAIN_NESTED;

drivers/iommu/intel/pasid.c

@@ -560,7 +560,6 @@ int intel_pasid_setup_nested(struct intel_iommu *iommu, struct device *dev,
 			     u32 pasid, struct dmar_domain *domain)
 {
 	struct iommu_hwpt_vtd_s1 *s1_cfg = &domain->s1_cfg;
-	pgd_t *s1_gpgd = (pgd_t *)(uintptr_t)domain->s1_pgtbl;
 	struct dmar_domain *s2_domain = domain->s2_domain;
 	u16 did = domain_id_iommu(domain, iommu);
 	struct dma_pte *pgd = s2_domain->pgd;
@@ -611,7 +610,7 @@ int intel_pasid_setup_nested(struct intel_iommu *iommu, struct device *dev,
 	if (s1_cfg->addr_width == ADDR_WIDTH_5LEVEL)
 		pasid_set_flpm(pte, 1);
 
-	pasid_set_flptr(pte, (uintptr_t)s1_gpgd);
+	pasid_set_flptr(pte, s1_cfg->pgtbl_addr);
 
 	if (s1_cfg->flags & IOMMU_VTD_S1_SRE) {
 		pasid_set_sre(pte);