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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2024-08-20 19:23:55 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2024-08-30 13:29:54 +0200 |
| commit | 82ef440f9a38a1fd7f4854397633a35af33840a5 (patch) | |
| tree | 1899480d8597fcb04325af51eb155c210e34ddff /arch/powerpc | |
| parent | powerpc/32s: Reduce default size of module/execmem area (diff) | |
| download | linux-82ef440f9a38a1fd7f4854397633a35af33840a5.tar.xz linux-82ef440f9a38a1fd7f4854397633a35af33840a5.zip | |
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 <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/1a0d1feee07c4cf955f6a43a704c203e5c90fa53.1724173828.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/nohash/pgalloc.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/mm/mem.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/include/asm/nohash/pgalloc.h b/arch/powerpc/include/asm/nohash/pgalloc.h index 4ef780b291bc..bb5f3e8ea912 100644 --- 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 index 7a5af64f165d..a0c5a0d7b249 100644 --- 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; |