xen/riscv: rename PTE "permissions" to "pte_flags"

paddr_to_pte()'s "permissions" parameter, the matching local in
setup_initial_mapping() and p2m_set_permission() don't only deal with
permission bits: they also handle PTE_VALID, PTE_USER, PTE_ACCESSED and
PTE_DIRTY.

Rename them to "pte_flags" and p2m_set_pte_flags() respectively.

No functional change.

Requested-by: Jan Beulich <jbeulich@suse.com>
Assisted-by: Claude:claude-opus-5
Signed-off-by: Baptiste Le Duc <baptiste.le-duc@vates.tech>
Acked-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Oleksii Kurochko <oleksii.kurochko@gmail.com>

xen/arch/riscv/include/asm/mm.h

@@ -22,9 +22,10 @@ extern vaddr_t directmap_virt_start;
 #define paddr_to_pfn(pa)  ((unsigned long)((pa) >> PAGE_SHIFT))
 
 static inline pte_t paddr_to_pte(paddr_t paddr,
-                                 unsigned int permissions)
+                                 unsigned int pte_flags)
 {
-    return (pte_t) { .pte = (paddr_to_pfn(paddr) << PTE_PPN_SHIFT) | permissions };
+    return (pte_t) { .pte = (paddr_to_pfn(paddr) << PTE_PPN_SHIFT) |
+                            pte_flags };
 }
 
 static inline paddr_t pte_to_paddr(pte_t pte)

xen/arch/riscv/mm.c

@@ -140,7 +140,7 @@ static void __init setup_initial_mapping(struct mmu_desc *mmu_desc,
         case 1: /* Level 0 */
             {
                 unsigned long paddr = (page_addr - map_start) + pa_start;
-                unsigned int permissions = PTE_LEAF_DEFAULT;
+                unsigned int pte_flags = PTE_LEAF_DEFAULT;
                 unsigned long addr = is_identity_mapping
                                      ? page_addr : virt_to_maddr(page_addr);
                 pte_t pte_to_be_written;
@@ -149,13 +149,12 @@ static void __init setup_initial_mapping(struct mmu_desc *mmu_desc,
 
                 if ( is_kernel_text(addr) ||
                      is_kernel_inittext(addr) )
-                        permissions =
-                            PTE_EXECUTABLE | PTE_READABLE | PTE_VALID;
+                    pte_flags = PTE_EXECUTABLE | PTE_READABLE | PTE_VALID;
 
                 if ( is_kernel_rodata(addr) )
-                    permissions = PTE_READABLE | PTE_VALID;
+                    pte_flags = PTE_READABLE | PTE_VALID;
 
-                pte_to_be_written = paddr_to_pte(paddr, permissions);
+                pte_to_be_written = paddr_to_pte(paddr, pte_flags);
 
                 if ( !pte_is_valid(pgtbl[index]) )
                     pgtbl[index] = pte_to_be_written;

xen/arch/riscv/p2m.c

@@ -584,7 +584,7 @@ static inline void p2m_clean_pte(pte_t *p, bool clean_cache)
     p2m_write_pte(p, pte, clean_cache);
 }
 
-static void p2m_set_permission(pte_t *e, p2m_type_t t)
+static void p2m_set_pte_flags(pte_t *e, p2m_type_t t)
 {
     e->pte &= ~PTE_ACCESS_MASK;
 
@@ -676,7 +676,7 @@ static pte_t p2m_pte_from_mfn(mfn_t mfn, p2m_type_t t,
             break;
         }
 
-        p2m_set_permission(&e, t);
+        p2m_set_pte_flags(&e, t);
         p2m_set_type(&e, t, ctx);
     }
     else