From: Benjamin Herrenschmidt Date: Tue, 5 Jul 2016 05:03:51 +0000 (+1000) Subject: powerpc/64: Move MMU backend selection out of platform code X-Git-Tag: v4.8-rc1~85^2~32 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=166dd7d3fbf2df183926f0e4b4855f6cbd8da945;p=platform%2Fkernel%2Flinux-exynos.git powerpc/64: Move MMU backend selection out of platform code We move it into early_mmu_init() based on firmware features. For PS3, we have to move the setting of these into early_init_devtree(). Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Michael Ellerman --- diff --git a/arch/powerpc/include/asm/ps3.h b/arch/powerpc/include/asm/ps3.h index a1bc7e7..a19f831 100644 --- a/arch/powerpc/include/asm/ps3.h +++ b/arch/powerpc/include/asm/ps3.h @@ -526,4 +526,6 @@ void ps3_sync_irq(int node); u32 ps3_get_hw_thread_id(int cpu); u64 ps3_get_spe_id(void *arg); +void ps3_early_mm_init(void); + #endif diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index 2bd1784..bae3db7 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -759,6 +759,12 @@ void __init early_init_devtree(void *params) /* Now try to figure out if we are running on LPAR and so on */ pseries_probe_fw_features(); +#ifdef CONFIG_PPC_PS3 + /* Identify PS3 firmware */ + if (of_flat_dt_is_compatible(of_get_flat_dt_root(), "sony,ps3")) + powerpc_firmware_features |= FW_FEATURE_PS3_POSSIBLE; +#endif + DBG(" <- early_init_devtree()\n"); } diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c index 859ecaa..336fad6 100644 --- a/arch/powerpc/mm/hash_utils_64.c +++ b/arch/powerpc/mm/hash_utils_64.c @@ -58,6 +58,7 @@ #include #include #include +#include #ifdef DEBUG #define DBG(fmt...) udbg_printf(fmt) @@ -872,6 +873,11 @@ static void __init htab_initialize(void) #undef KB #undef MB +void __init __weak hpte_init_lpar(void) +{ + panic("FW_FEATURE_LPAR set but no LPAR support compiled\n"); +} + void __init hash__early_init_mmu(void) { /* @@ -908,6 +914,14 @@ void __init hash__early_init_mmu(void) pci_io_base = ISA_IO_BASE; #endif + /* Select appropriate backend */ + if (firmware_has_feature(FW_FEATURE_PS3_LV1)) + ps3_early_mm_init(); + else if (firmware_has_feature(FW_FEATURE_LPAR)) + hpte_init_lpar(); + else + hpte_init_native(); + /* Initialize the MMU Hash table and create the linear mapping * of memory. Has to be done before SLB initialization as this is * currently where the page size encoding is obtained. diff --git a/arch/powerpc/mm/pgtable-radix.c b/arch/powerpc/mm/pgtable-radix.c index 4ea1094..003ff48 100644 --- a/arch/powerpc/mm/pgtable-radix.c +++ b/arch/powerpc/mm/pgtable-radix.c @@ -345,6 +345,7 @@ void __init radix__early_init_mmu(void) radix_init_page_sizes(); if (!firmware_has_feature(FW_FEATURE_LPAR)) { + radix_init_native(); lpcr = mfspr(SPRN_LPCR); mtspr(SPRN_LPCR, lpcr | LPCR_UPRT | LPCR_HR); radix_init_partition_table(); diff --git a/arch/powerpc/platforms/cell/setup.c b/arch/powerpc/platforms/cell/setup.c index 36cff28..e342f78 100644 --- a/arch/powerpc/platforms/cell/setup.c +++ b/arch/powerpc/platforms/cell/setup.c @@ -261,7 +261,6 @@ static int __init cell_probe(void) !of_flat_dt_is_compatible(root, "IBM,CPBW-1.0")) return 0; - hpte_init_native(); pm_power_off = rtas_power_off; return 1; diff --git a/arch/powerpc/platforms/maple/setup.c b/arch/powerpc/platforms/maple/setup.c index 99b9b96..b1ecd99 100644 --- a/arch/powerpc/platforms/maple/setup.c +++ b/arch/powerpc/platforms/maple/setup.c @@ -306,7 +306,6 @@ static int __init maple_probe(void) !of_flat_dt_is_compatible(root, "Momentum,Apache")) return 0; - hpte_init_native(); pm_power_off = maple_power_off; return 1; diff --git a/arch/powerpc/platforms/pasemi/setup.c b/arch/powerpc/platforms/pasemi/setup.c index 7349644..924d01d 100644 --- a/arch/powerpc/platforms/pasemi/setup.c +++ b/arch/powerpc/platforms/pasemi/setup.c @@ -426,8 +426,6 @@ static int __init pas_probe(void) !of_flat_dt_is_compatible(root, "pasemi,pwrficient")) return 0; - hpte_init_native(); - alloc_iobmap_l2(); return 1; diff --git a/arch/powerpc/platforms/powermac/setup.c b/arch/powerpc/platforms/powermac/setup.c index 4ad6168..795bf8c 100644 --- a/arch/powerpc/platforms/powermac/setup.c +++ b/arch/powerpc/platforms/powermac/setup.c @@ -599,10 +599,6 @@ static int __init pmac_probe(void) !of_flat_dt_is_compatible(root, "MacRISC")) return 0; -#ifdef CONFIG_PPC64 - hpte_init_native(); -#endif - #ifdef CONFIG_PPC32 /* isa_io_base gets set in pmac_pci_init */ ISA_DMA_THRESHOLD = ~0L; diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c index 8492bbb..f70ea83 100644 --- a/arch/powerpc/platforms/powernv/setup.c +++ b/arch/powerpc/platforms/powernv/setup.c @@ -273,11 +273,6 @@ static int __init pnv_probe(void) if (!of_flat_dt_is_compatible(root, "ibm,powernv")) return 0; - if (IS_ENABLED(CONFIG_PPC_RADIX_MMU) && radix_enabled()) - radix_init_native(); - else if (IS_ENABLED(CONFIG_PPC_STD_MMU_64)) - hpte_init_native(); - if (firmware_has_feature(FW_FEATURE_OPAL)) pnv_setup_machdep_opal(); diff --git a/arch/powerpc/platforms/ps3/setup.c b/arch/powerpc/platforms/ps3/setup.c index 486ecd0..b7fdf88 100644 --- a/arch/powerpc/platforms/ps3/setup.c +++ b/arch/powerpc/platforms/ps3/setup.c @@ -226,9 +226,17 @@ static void __init ps3_progress(char *s, unsigned short hex) printk("*** %04x : %s\n", hex, s ? s : ""); } -static int __init ps3_probe(void) +void __init ps3_early_mm_init(void) { unsigned long htab_size; + + ps3_mm_init(); + ps3_mm_vas_create(&htab_size); + ps3_hpte_init(htab_size); +} + +static int __init ps3_probe(void) +{ unsigned long dt_root; DBG(" -> %s:%d\n", __func__, __LINE__); @@ -237,12 +245,7 @@ static int __init ps3_probe(void) if (!of_flat_dt_is_compatible(dt_root, "sony,ps3")) return 0; - powerpc_firmware_features |= FW_FEATURE_PS3_POSSIBLE; - ps3_os_area_save_params(); - ps3_mm_init(); - ps3_mm_vas_create(&htab_size); - ps3_hpte_init(htab_size); pm_power_off = ps3_power_off; DBG(" <- %s:%d\n", __func__, __LINE__); diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index ba7dc12..2407213 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -687,13 +687,6 @@ static int __init pSeries_probe(void) of_flat_dt_is_compatible(root, "IBM,CBEA")) return 0; - pr_debug("pSeries detected, looking for LPAR capability...\n"); - - if (firmware_has_feature(FW_FEATURE_LPAR)) - hpte_init_lpar(); - else - hpte_init_native(); - pm_power_off = pseries_power_off; pr_debug("Machine is%s LPAR !\n",