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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2019-02-21 13:37:55 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-02-21 16:10:16 +0300 |
| commit | 93c4a162b014d238a287f8264adb25c009c79e61 (patch) | |
| tree | 22a11a62f16f26c387315108f5b6ff2892f9e14f /arch/powerpc/kernel/cpu_setup_6xx.S | |
| parent | 0df977eafc792a5365a7f81d8d5920132e03afad (diff) | |
| download | linux-93c4a162b014d238a287f8264adb25c009c79e61.tar.xz | |
powerpc/6xx: Store PGDIR physical address in a SPRG
Use SPRN_SPRG2 to store the current thread PGDIR and
avoid reading thread_struct.pgdir at every TLB miss.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/cpu_setup_6xx.S')
| -rw-r--r-- | arch/powerpc/kernel/cpu_setup_6xx.S | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/cpu_setup_6xx.S b/arch/powerpc/kernel/cpu_setup_6xx.S index 8c069e96c478..6f1c11e0691f 100644 --- a/arch/powerpc/kernel/cpu_setup_6xx.S +++ b/arch/powerpc/kernel/cpu_setup_6xx.S @@ -24,6 +24,10 @@ BEGIN_MMU_FTR_SECTION li r10,0 mtspr SPRN_SPRG_603_LRU,r10 /* init SW LRU tracking */ END_MMU_FTR_SECTION_IFSET(MMU_FTR_NEED_DTLB_SW_LRU) + lis r10, (swapper_pg_dir - PAGE_OFFSET)@h + ori r10, r10, (swapper_pg_dir - PAGE_OFFSET)@l + mtspr SPRN_SPRG_PGDIR, r10 + BEGIN_FTR_SECTION bl __init_fpu_registers END_FTR_SECTION_IFCLR(CPU_FTR_FPU_UNAVAILABLE) |