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| author | Dave Kleikamp <shaggy@linux.vnet.ibm.com> | 2011-07-04 18:38:03 +0000 |
|---|---|---|
| committer | Josh Boyer <jwboyer@linux.vnet.ibm.com> | 2011-07-12 09:21:55 -0400 |
| commit | 91b191c71eae79c0e652c52a968d06cd96b539c5 (patch) | |
| tree | f1f0aeccbba77d3a89dfbc951578570e35debe7f /arch/powerpc | |
| parent | 112d1fe9f7715db423ffeec5ac1beccff6093dc4 (diff) | |
| download | linux-91b191c71eae79c0e652c52a968d06cd96b539c5.tar.gz linux-91b191c71eae79c0e652c52a968d06cd96b539c5.tar.bz2 linux-91b191c71eae79c0e652c52a968d06cd96b539c5.zip | |
powerpc/44x: don't use tlbivax on AMP systems
Since other OS's may be running on the other cores don't use tlbivax
Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/mmu.h | 7 | ||||
| -rw-r--r-- | arch/powerpc/kernel/setup_32.c | 2 | ||||
| -rw-r--r-- | arch/powerpc/mm/tlb_hash32.c | 4 | ||||
| -rw-r--r-- | arch/powerpc/mm/tlb_nohash.c | 19 |
4 files changed, 31 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h index 4138b21ae80a..bb5591f424b3 100644 --- a/arch/powerpc/include/asm/mmu.h +++ b/arch/powerpc/include/asm/mmu.h @@ -120,9 +120,14 @@ static inline int mmu_has_feature(unsigned long feature) return (cur_cpu_spec->mmu_features & feature); } +static inline void mmu_clear_feature(unsigned long feature) +{ + cur_cpu_spec->mmu_features &= ~feature; +} + extern unsigned int __start___mmu_ftr_fixup, __stop___mmu_ftr_fixup; -/* MMU initialization (64-bit only fo now) */ +/* MMU initialization */ extern void early_init_mmu(void); extern void early_init_mmu_secondary(void); diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c index 1d2fbc905303..7544e39b4156 100644 --- a/arch/powerpc/kernel/setup_32.c +++ b/arch/powerpc/kernel/setup_32.c @@ -126,6 +126,8 @@ notrace void __init machine_init(unsigned long dt_ptr) /* Do some early initialization based on the flat device tree */ early_init_devtree(__va(dt_ptr)); + early_init_mmu(); + probe_machine(); setup_kdump_trampoline(); diff --git a/arch/powerpc/mm/tlb_hash32.c b/arch/powerpc/mm/tlb_hash32.c index 27b863c14941..9a445f64accd 100644 --- a/arch/powerpc/mm/tlb_hash32.c +++ b/arch/powerpc/mm/tlb_hash32.c @@ -177,3 +177,7 @@ void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, flush_range(vma->vm_mm, start, end); } EXPORT_SYMBOL(flush_tlb_range); + +void __init early_init_mmu(void) +{ +} diff --git a/arch/powerpc/mm/tlb_nohash.c b/arch/powerpc/mm/tlb_nohash.c index 3722185d1865..7355211b93b3 100644 --- a/arch/powerpc/mm/tlb_nohash.c +++ b/arch/powerpc/mm/tlb_nohash.c @@ -35,6 +35,7 @@ #include <linux/preempt.h> #include <linux/spinlock.h> #include <linux/memblock.h> +#include <linux/of_fdt.h> #include <asm/tlbflush.h> #include <asm/tlb.h> @@ -266,6 +267,17 @@ EXPORT_SYMBOL(flush_tlb_page); #endif /* CONFIG_SMP */ +#ifdef CONFIG_PPC_47x +void __init early_init_mmu_47x(void) +{ +#ifdef CONFIG_SMP + unsigned long root = of_get_flat_dt_root(); + if (of_get_flat_dt_prop(root, "cooperative-partition", NULL)) + mmu_clear_feature(MMU_FTR_USE_TLBIVAX_BCAST); +#endif /* CONFIG_SMP */ +} +#endif /* CONFIG_PPC_47x */ + /* * Flush kernel TLB entries in the given range */ @@ -593,4 +605,11 @@ void setup_initial_memory_limit(phys_addr_t first_memblock_base, /* Finally limit subsequent allocations */ memblock_set_current_limit(first_memblock_base + ppc64_rma_size); } +#else /* ! CONFIG_PPC64 */ +void __init early_init_mmu(void) +{ +#ifdef CONFIG_PPC_47x + early_init_mmu_47x(); +#endif +} #endif /* CONFIG_PPC64 */ |