From 94b2a4393c500a620de90c3266d595926302e26b Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Sat, 10 Mar 2007 00:05:37 +0100 Subject: [POWERPC] Fix spu SLB invalidations The SPU code doesn't properly invalidate SPUs SLBs when necessary, for example when changing a segment size from the hugetlbfs code. In addition, it saves and restores the SLB content on context switches which makes it harder to properly handle those invalidations. This patch removes the saving & restoring for now, something more efficient might be found later on. It also adds a spu_flush_all_slbs(mm) that can be used by the core mm code to flush the SLBs of all SPEs that are running a given mm at the time of the flush. In order to do that, it adds a spinlock to the list of all SPEs and move some bits & pieces from spufs to spu_base.c Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/mm/hash_utils_64.c | 6 ++++++ arch/powerpc/mm/hugetlbpage.c | 4 ++++ 2 files changed, 10 insertions(+) (limited to 'arch/powerpc/mm') diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c index c0d2a694fa3..3c7fe2c65b5 100644 --- a/arch/powerpc/mm/hash_utils_64.c +++ b/arch/powerpc/mm/hash_utils_64.c @@ -685,6 +685,9 @@ int hash_page(unsigned long ea, unsigned long access, unsigned long trap) "non-cacheable mapping\n"); psize = mmu_vmalloc_psize = MMU_PAGE_4K; } +#ifdef CONFIG_SPE_BASE + spu_flush_all_slbs(mm); +#endif } if (user_region) { if (psize != get_paca()->context.user_psize) { @@ -759,6 +762,9 @@ void hash_preload(struct mm_struct *mm, unsigned long ea, mmu_psize_defs[MMU_PAGE_4K].sllp; get_paca()->context = mm->context; slb_flush_and_rebolt(); +#ifdef CONFIG_SPE_BASE + spu_flush_all_slbs(mm); +#endif } } if (mm->context.user_psize == MMU_PAGE_64K) diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c index 8c77c791f87..f6ffaaa7a5b 100644 --- a/arch/powerpc/mm/hugetlbpage.c +++ b/arch/powerpc/mm/hugetlbpage.c @@ -24,6 +24,7 @@ #include #include #include +#include #include @@ -513,6 +514,9 @@ int prepare_hugepage_range(unsigned long addr, unsigned long len, pgoff_t pgoff) if ((addr + len) > 0x100000000UL) err = open_high_hpage_areas(current->mm, HTLB_AREA_MASK(addr, len)); +#ifdef CONFIG_SPE_BASE + spu_flush_all_slbs(current->mm); +#endif if (err) { printk(KERN_DEBUG "prepare_hugepage_range(%lx, %lx)" " failed (lowmask: 0x%04hx, highmask: 0x%04hx)\n", -- cgit v1.2.3-70-g09d2