From cfe666b145cecffe784d98e60ffe201a5dc57ac3 Mon Sep 17 00:00:00 2001 From: Paul Mackerras Date: Mon, 24 Mar 2008 17:41:22 +1100 Subject: [PATCH] [POWERPC] Don't use 64k pages for ioremap on pSeries On pSeries, the hypervisor doesn't let us map in the eHEA ethernet adapter using 64k pages, and thus the ehea driver will fail if 64k pages are configured. This works around the problem by always using 4k pages for ioremap on pSeries (but not on other platforms). A better fix would be to check whether the partition could ever have an eHEA adapter, and only force 4k pages if it could, but this will do for 2.6.25. This is based on an earlier patch by Tony Breeds. Signed-off-by: Paul Mackerras --- arch/powerpc/mm/hash_utils_64.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c index 590f1f67c87..a83dfa3cf40 100644 --- a/arch/powerpc/mm/hash_utils_64.c +++ b/arch/powerpc/mm/hash_utils_64.c @@ -351,9 +351,14 @@ static void __init htab_init_page_sizes(void) mmu_vmalloc_psize = MMU_PAGE_64K; if (mmu_linear_psize == MMU_PAGE_4K) mmu_linear_psize = MMU_PAGE_64K; - if (cpu_has_feature(CPU_FTR_CI_LARGE_PAGE)) - mmu_io_psize = MMU_PAGE_64K; - else + if (cpu_has_feature(CPU_FTR_CI_LARGE_PAGE)) { + /* + * Don't use 64k pages for ioremap on pSeries, since + * that would stop us accessing the HEA ethernet. + */ + if (!machine_is(pseries)) + mmu_io_psize = MMU_PAGE_64K; + } else mmu_ci_restrictions = 1; } #endif /* CONFIG_PPC_64K_PAGES */ -- 2.41.1