powerpc/603: Copy kernel PGD entries into all PGDIRs and preallocate …

…execmem page tables For the same reason as 8xx, copy kernel PGD entries into all PGDIRs in pgd_alloc() and preallocate execmem page tables before creating new PGDs so that all PGD entries related to execmem are copied by pgd_alloc(). This will help reduce the fast-path in TLBmiss handlers. Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://msgid.link/1a0d1feee07c4cf955f6a43a704c203e5c90fa53.1724173828.git.christophe.leroy@csgroup.eu
mj22226 · Aug 30, 2024 · 82ef440 · 82ef440
1 parent 2f2b9a3
commit 82ef440
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Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/arch/powerpc/include/asm/nohash/pgalloc.h b/arch/powerpc/include/asm/nohash/pgalloc.h
@@ -22,7 +22,7 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm)
 	pgd_t *pgd = kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE),
 			pgtable_gfp_flags(mm, GFP_KERNEL));
 
-#ifdef CONFIG_PPC_8xx
+#if defined(CONFIG_PPC_8xx) || defined(CONFIG_PPC_BOOK3S_603)
 	memcpy(pgd + USER_PTRS_PER_PGD, swapper_pg_dir + USER_PTRS_PER_PGD,
 	       (MAX_PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
 #endif

diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
@@ -412,7 +412,7 @@ EXPORT_SYMBOL_GPL(walk_system_ram_range);
 #ifdef CONFIG_EXECMEM
 static struct execmem_info execmem_info __ro_after_init;
 
-#ifdef CONFIG_PPC_8xx
+#if defined(CONFIG_PPC_8xx) || defined(CONFIG_PPC_BOOK3S_603)
 static void prealloc_execmem_pgtable(void)
 {
 	unsigned long va;