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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2022-06-14 12:32:24 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-06-29 16:59:06 +1000 |
| commit | 56e54b4e6c477b2a7df43f9a320ae5f9a5bfb16c (patch) | |
| tree | 2ab07fd30c20c1aa637528ffbdb86eefa4f0dde4 | |
| parent | 1ce844973bb516e95d3f2bcb001a3992548def9d (diff) | |
| download | linux-56e54b4e6c477b2a7df43f9a320ae5f9a5bfb16c.tar.bz2 | |
powerpc/32: Remove 'noltlbs' kernel parameter
Mapping without large TLBs has no added value on the 8xx.
Mapping without large TLBs is still necessary on 40x when
selecting CONFIG_KFENCE or CONFIG_DEBUG_PAGEALLOC or
CONFIG_STRICT_KERNEL_RWX, but this is done automatically
and doesn't require user selection.
Remove 'noltlbs' kernel parameter, the user has no reason
to use it.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/80ca17bd39cf608a8ebd0764d7064a498e131199.1655202721.git.christophe.leroy@csgroup.eu
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 3 | ||||
| -rw-r--r-- | arch/powerpc/mm/init_32.c | 3 | ||||
| -rw-r--r-- | arch/powerpc/mm/nohash/8xx.c | 9 |
3 files changed, 0 insertions, 15 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 96de3f1ece00..2322e429150d 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -3661,9 +3661,6 @@ nolapic_timer [X86-32,APIC] Do not use the local APIC timer. - noltlbs [PPC] Do not use large page/tlb entries for kernel - lowmem mapping on PPC40x and PPC8xx - nomca [IA-64] Disable machine check abort handling nomce [X86-32] Disable Machine Check Exception diff --git a/arch/powerpc/mm/init_32.c b/arch/powerpc/mm/init_32.c index 321794747ea1..6f2e6210c273 100644 --- a/arch/powerpc/mm/init_32.c +++ b/arch/powerpc/mm/init_32.c @@ -79,9 +79,6 @@ unsigned long __max_low_memory = MAX_LOW_MEM; */ static void __init MMU_setup(void) { - if (strstr(boot_command_line, "noltlbs")) { - __map_without_ltlbs = 1; - } if (IS_ENABLED(CONFIG_PPC_8xx)) return; diff --git a/arch/powerpc/mm/nohash/8xx.c b/arch/powerpc/mm/nohash/8xx.c index 27f9186ae374..6b668ccef836 100644 --- a/arch/powerpc/mm/nohash/8xx.c +++ b/arch/powerpc/mm/nohash/8xx.c @@ -14,8 +14,6 @@ #define IMMR_SIZE (FIX_IMMR_SIZE << PAGE_SHIFT) -extern int __map_without_ltlbs; - static unsigned long block_mapped_ram; /* @@ -28,8 +26,6 @@ phys_addr_t v_block_mapped(unsigned long va) if (va >= VIRT_IMMR_BASE && va < VIRT_IMMR_BASE + IMMR_SIZE) return p + va - VIRT_IMMR_BASE; - if (__map_without_ltlbs) - return 0; if (va >= PAGE_OFFSET && va < PAGE_OFFSET + block_mapped_ram) return __pa(va); return 0; @@ -45,8 +41,6 @@ unsigned long p_block_mapped(phys_addr_t pa) if (pa >= p && pa < p + IMMR_SIZE) return VIRT_IMMR_BASE + pa - p; - if (__map_without_ltlbs) - return 0; if (pa < block_mapped_ram) return (unsigned long)__va(pa); return 0; @@ -153,9 +147,6 @@ unsigned long __init mmu_mapin_ram(unsigned long base, unsigned long top) mmu_mapin_immr(); - if (__map_without_ltlbs) - return 0; - mmu_mapin_ram_chunk(0, boundary, PAGE_KERNEL_TEXT, true); if (debug_pagealloc_enabled_or_kfence()) { top = boundary; |