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powerpc/603: Really copy kernel PGD entries into all PGDIRs

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[ Upstream commit f2863371f0 ]

Commit 82ef440f9a ("powerpc/603: Copy kernel PGD entries into all
PGDIRs and preallocate execmem page tables") was supposed to extend
to powerpc 603 the copy of kernel PGD entries into all PGDIRs
implemented in a previous patch on the 8xx. But 603 is book3s/32 and
uses a duplicate of pgd_alloc() defined in another header.

So really do the copy at the correct place for the 603.

Fixes: 82ef440f9a ("powerpc/603: Copy kernel PGD entries into all PGDIRs and preallocate execmem page tables")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/752ab7514cae089a2dd7cc0f3d5e35849f76adb9.1755757797.git.christophe.leroy@csgroup.eu
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Christophe Leroy
2025-08-21 08:30:18 +02:00
committed by Greg Kroah-Hartman
parent 554bb7c95e
commit 26fa5088ef
2 changed files with 9 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
arch/powerpc/include/asm/book3s/32/pgalloc.h
View File

@@ -7,8 +7,14 @@
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE),
pgtable_gfp_flags(mm, GFP_KERNEL));
pgd_t *pgd = kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE),
pgtable_gfp_flags(mm, GFP_KERNEL));
#ifdef 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
return pgd;
}
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)

2
arch/powerpc/include/asm/nohash/pgalloc.h
View File

@@ -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));
#if defined(CONFIG_PPC_8xx) || defined(CONFIG_PPC_BOOK3S_603)
#ifdef CONFIG_PPC_8xx
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