From 05510f2b4819398a25ef432d72efa9e95419768a Mon Sep 17 00:00:00 2001 From: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Date: Tue, 7 Mar 2017 14:19:56 +0100 Subject: MIPS: Enable GENERIC_CPU_AUTOPROBE Add missing macros and methods that are required by CONFIG_GENERIC_CPU_AUTOPROBE: MAX_CPU_FEATURES, cpu_have_feature(), cpu_feature(). Also set a default elf platform as currently it is not set for most MIPS platforms resulting in incorrectly specified modalias values in cpu autoprobe ("cpu:type:(null):feature:..."). Export 'elf_hwcap' symbol so that it can be accessed from modules that use module_cpu_feature_match() Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/15395/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> --- arch/mips/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/mips/Kconfig') diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index e0bb576410bb..68af16b72e9c 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -46,6 +46,7 @@ config MIPS select ARCH_DISCARD_MEMBLOCK select GENERIC_SMP_IDLE_THREAD select BUILDTIME_EXTABLE_SORT + select GENERIC_CPU_AUTOPROBE select GENERIC_CLOCKEVENTS select GENERIC_SCHED_CLOCK if !CAVIUM_OCTEON_SOC select GENERIC_CMOS_UPDATE -- cgit v1.2.3 From 3377e227af441aff710726437adc20efc359fd9c Mon Sep 17 00:00:00 2001 From: Alex Belits <alex.belits@cavium.com> Date: Thu, 16 Feb 2017 17:27:34 -0800 Subject: MIPS: Add 48-bit VA space (and 4-level page tables) for 4K pages. Some users must have 4K pages while needing a 48-bit VA space size. The cleanest way do do this is to go to a 4-level page table for this case. Each page table level using order-0 pages adds 9 bits to the VA size (at 4K pages, so for four levels we get 9 * 4 + 12 == 48-bits. For the 4K page size case only we add support functions for the PUD level of the page table tree, also the TLB exception handlers get an extra level of tree walk. [david.daney@cavium.com: Forward port to v4.10.] [david.daney@cavium.com: Forward port to v4.11.] Signed-off-by: Alex Belits <alex.belits@cavium.com> Signed-off-by: David Daney <david.daney@cavium.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: Alex Belits <alex.belits@cavium.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15312/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> --- arch/mips/Kconfig | 13 +++--- arch/mips/include/asm/pgalloc.h | 26 +++++++++++ arch/mips/include/asm/pgtable-64.h | 88 +++++++++++++++++++++++++++++++++++--- arch/mips/mm/init.c | 3 ++ arch/mips/mm/pgtable-64.c | 33 ++++++++++++-- arch/mips/mm/tlbex.c | 22 ++++++++++ 6 files changed, 172 insertions(+), 13 deletions(-) (limited to 'arch/mips/Kconfig') diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 68af16b72e9c..f4dd2c322d4b 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -2121,10 +2121,13 @@ config MIPS_VA_BITS_48 bool "48 bits virtual memory" depends on 64BIT help - Support a maximum at least 48 bits of application virtual memory. - Default is 40 bits or less, depending on the CPU. - This option result in a small memory overhead for page tables. - This option is only supported with 16k and 64k page sizes. + Support a maximum at least 48 bits of application virtual + memory. Default is 40 bits or less, depending on the CPU. + For page sizes 16k and above, this option results in a small + memory overhead for page tables. For 4k page size, a fourth + level of page tables is added which imposes both a memory + overhead as well as slower TLB fault handling. + If unsure, say N. choice @@ -2134,7 +2137,6 @@ choice config PAGE_SIZE_4KB bool "4kB" depends on !CPU_LOONGSON2 && !CPU_LOONGSON3 - depends on !MIPS_VA_BITS_48 help This option select the standard 4kB Linux page size. On some R3000-family processors this is the only available page size. Using @@ -2983,6 +2985,7 @@ config HAVE_LATENCYTOP_SUPPORT config PGTABLE_LEVELS int + default 4 if PAGE_SIZE_4KB && MIPS_VA_BITS_48 default 3 if 64BIT && !PAGE_SIZE_64KB default 2 diff --git a/arch/mips/include/asm/pgalloc.h b/arch/mips/include/asm/pgalloc.h index a8705f6c8180..a1bdb1ea5234 100644 --- a/arch/mips/include/asm/pgalloc.h +++ b/arch/mips/include/asm/pgalloc.h @@ -110,6 +110,32 @@ static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) #endif +#ifndef __PAGETABLE_PUD_FOLDED + +static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address) +{ + pud_t *pud; + + pud = (pud_t *) __get_free_pages(GFP_KERNEL|__GFP_REPEAT, PUD_ORDER); + if (pud) + pud_init((unsigned long)pud, (unsigned long)invalid_pmd_table); + return pud; +} + +static inline void pud_free(struct mm_struct *mm, pud_t *pud) +{ + free_pages((unsigned long)pud, PUD_ORDER); +} + +static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud) +{ + set_pgd(pgd, __pgd((unsigned long)pud)); +} + +#define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x) + +#endif /* __PAGETABLE_PUD_FOLDED */ + #define check_pgt_cache() do { } while (0) extern void pagetable_init(void); diff --git a/arch/mips/include/asm/pgtable-64.h b/arch/mips/include/asm/pgtable-64.h index 130a2a6c1531..67fe6dc5211c 100644 --- a/arch/mips/include/asm/pgtable-64.h +++ b/arch/mips/include/asm/pgtable-64.h @@ -20,7 +20,7 @@ #define __ARCH_USE_5LEVEL_HACK #if defined(CONFIG_PAGE_SIZE_64KB) && !defined(CONFIG_MIPS_VA_BITS_48) #include <asm-generic/pgtable-nopmd.h> -#else +#elif !(defined(CONFIG_PAGE_SIZE_4KB) && defined(CONFIG_MIPS_VA_BITS_48)) #include <asm-generic/pgtable-nopud.h> #endif @@ -54,9 +54,18 @@ #define PMD_SIZE (1UL << PMD_SHIFT) #define PMD_MASK (~(PMD_SIZE-1)) +# ifdef __PAGETABLE_PUD_FOLDED +# define PGDIR_SHIFT (PMD_SHIFT + (PAGE_SHIFT + PMD_ORDER - 3)) +# endif +#endif -#define PGDIR_SHIFT (PMD_SHIFT + (PAGE_SHIFT + PMD_ORDER - 3)) +#ifndef __PAGETABLE_PUD_FOLDED +#define PUD_SHIFT (PMD_SHIFT + (PAGE_SHIFT + PMD_ORDER - 3)) +#define PUD_SIZE (1UL << PUD_SHIFT) +#define PUD_MASK (~(PUD_SIZE-1)) +#define PGDIR_SHIFT (PUD_SHIFT + (PAGE_SHIFT + PUD_ORDER - 3)) #endif + #define PGDIR_SIZE (1UL << PGDIR_SHIFT) #define PGDIR_MASK (~(PGDIR_SIZE-1)) @@ -79,8 +88,13 @@ * of virtual address space. */ #ifdef CONFIG_PAGE_SIZE_4KB -#define PGD_ORDER 1 -#define PUD_ORDER aieeee_attempt_to_allocate_pud +# ifdef CONFIG_MIPS_VA_BITS_48 +# define PGD_ORDER 0 +# define PUD_ORDER 0 +# else +# define PGD_ORDER 1 +# define PUD_ORDER aieeee_attempt_to_allocate_pud +# endif #define PMD_ORDER 0 #define PTE_ORDER 0 #endif @@ -118,6 +132,9 @@ #endif #define PTRS_PER_PGD ((PAGE_SIZE << PGD_ORDER) / sizeof(pgd_t)) +#ifndef __PAGETABLE_PUD_FOLDED +#define PTRS_PER_PUD ((PAGE_SIZE << PUD_ORDER) / sizeof(pud_t)) +#endif #ifndef __PAGETABLE_PMD_FOLDED #define PTRS_PER_PMD ((PAGE_SIZE << PMD_ORDER) / sizeof(pmd_t)) #endif @@ -134,7 +151,7 @@ #define VMALLOC_START (MAP_BASE + (2 * PAGE_SIZE)) #define VMALLOC_END \ (MAP_BASE + \ - min(PTRS_PER_PGD * PTRS_PER_PMD * PTRS_PER_PTE * PAGE_SIZE, \ + min(PTRS_PER_PGD * PTRS_PER_PUD * PTRS_PER_PMD * PTRS_PER_PTE * PAGE_SIZE, \ (1UL << cpu_vmbits)) - (1UL << 32)) #if defined(CONFIG_MODULES) && defined(KBUILD_64BIT_SYM32) && \ @@ -150,12 +167,72 @@ #define pmd_ERROR(e) \ printk("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e)) #endif +#ifndef __PAGETABLE_PUD_FOLDED +#define pud_ERROR(e) \ + printk("%s:%d: bad pud %016lx.\n", __FILE__, __LINE__, pud_val(e)) +#endif #define pgd_ERROR(e) \ printk("%s:%d: bad pgd %016lx.\n", __FILE__, __LINE__, pgd_val(e)) extern pte_t invalid_pte_table[PTRS_PER_PTE]; extern pte_t empty_bad_page_table[PTRS_PER_PTE]; +#ifndef __PAGETABLE_PUD_FOLDED +/* + * For 4-level pagetables we defines these ourselves, for 3-level the + * definitions are below, for 2-level the + * definitions are supplied by <asm-generic/pgtable-nopmd.h>. + */ +typedef struct { unsigned long pud; } pud_t; +#define pud_val(x) ((x).pud) +#define __pud(x) ((pud_t) { (x) }) + +extern pud_t invalid_pud_table[PTRS_PER_PUD]; + +/* + * Empty pgd entries point to the invalid_pud_table. + */ +static inline int pgd_none(pgd_t pgd) +{ + return pgd_val(pgd) == (unsigned long)invalid_pud_table; +} + +static inline int pgd_bad(pgd_t pgd) +{ + if (unlikely(pgd_val(pgd) & ~PAGE_MASK)) + return 1; + + return 0; +} + +static inline int pgd_present(pgd_t pgd) +{ + return pgd_val(pgd) != (unsigned long)invalid_pud_table; +} + +static inline void pgd_clear(pgd_t *pgdp) +{ + pgd_val(*pgdp) = (unsigned long)invalid_pud_table; +} + +#define pud_index(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD - 1)) + +static inline unsigned long pgd_page_vaddr(pgd_t pgd) +{ + return pgd_val(pgd); +} + +static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address) +{ + return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address); +} + +static inline void set_pgd(pgd_t *pgd, pgd_t pgdval) +{ + *pgd = pgdval; +} + +#endif #ifndef __PAGETABLE_PMD_FOLDED /* @@ -281,6 +358,7 @@ static inline pmd_t *pmd_offset(pud_t * pud, unsigned long address) * Initialize a new pgd / pmd table with invalid pointers. */ extern void pgd_init(unsigned long page); +extern void pud_init(unsigned long page, unsigned long pagetable); extern void pmd_init(unsigned long page, unsigned long pagetable); /* diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c index aa75849c36bc..37aa931501bf 100644 --- a/arch/mips/mm/init.c +++ b/arch/mips/mm/init.c @@ -537,6 +537,9 @@ unsigned long pgd_current[NR_CPUS]; * it in the linker script. */ pgd_t swapper_pg_dir[_PTRS_PER_PGD] __section(.bss..swapper_pg_dir); +#ifndef __PAGETABLE_PUD_FOLDED +pud_t invalid_pud_table[PTRS_PER_PUD] __page_aligned_bss; +#endif #ifndef __PAGETABLE_PMD_FOLDED pmd_t invalid_pmd_table[PTRS_PER_PMD] __page_aligned_bss; EXPORT_SYMBOL_GPL(invalid_pmd_table); diff --git a/arch/mips/mm/pgtable-64.c b/arch/mips/mm/pgtable-64.c index 0ae7b28b4db5..6fd6e96fdebb 100644 --- a/arch/mips/mm/pgtable-64.c +++ b/arch/mips/mm/pgtable-64.c @@ -19,10 +19,12 @@ void pgd_init(unsigned long page) unsigned long *p, *end; unsigned long entry; -#ifdef __PAGETABLE_PMD_FOLDED - entry = (unsigned long)invalid_pte_table; -#else +#if !defined(__PAGETABLE_PUD_FOLDED) + entry = (unsigned long)invalid_pud_table; +#elif !defined(__PAGETABLE_PMD_FOLDED) entry = (unsigned long)invalid_pmd_table; +#else + entry = (unsigned long)invalid_pte_table; #endif p = (unsigned long *) page; @@ -64,6 +66,28 @@ void pmd_init(unsigned long addr, unsigned long pagetable) EXPORT_SYMBOL_GPL(pmd_init); #endif +#ifndef __PAGETABLE_PUD_FOLDED +void pud_init(unsigned long addr, unsigned long pagetable) +{ + unsigned long *p, *end; + + p = (unsigned long *)addr; + end = p + PTRS_PER_PUD; + + do { + p[0] = pagetable; + p[1] = pagetable; + p[2] = pagetable; + p[3] = pagetable; + p[4] = pagetable; + p += 8; + p[-3] = pagetable; + p[-2] = pagetable; + p[-1] = pagetable; + } while (p != end); +} +#endif + pmd_t mk_pmd(struct page *page, pgprot_t prot) { pmd_t pmd; @@ -87,6 +111,9 @@ void __init pagetable_init(void) /* Initialize the entire pgd. */ pgd_init((unsigned long)swapper_pg_dir); +#ifndef __PAGETABLE_PUD_FOLDED + pud_init((unsigned long)invalid_pud_table, (unsigned long)invalid_pmd_table); +#endif #ifndef __PAGETABLE_PMD_FOLDED pmd_init((unsigned long)invalid_pmd_table, (unsigned long)invalid_pte_table); #endif diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c index 4f642e07c2b1..ed1c5297547a 100644 --- a/arch/mips/mm/tlbex.c +++ b/arch/mips/mm/tlbex.c @@ -865,6 +865,13 @@ void build_get_pmde64(u32 **p, struct uasm_label **l, struct uasm_reloc **r, uasm_i_andi(p, tmp, tmp, (PTRS_PER_PGD - 1)<<3); uasm_i_daddu(p, ptr, ptr, tmp); /* add in pgd offset */ +#ifndef __PAGETABLE_PUD_FOLDED + uasm_i_dmfc0(p, tmp, C0_BADVADDR); /* get faulting address */ + uasm_i_ld(p, ptr, 0, ptr); /* get pud pointer */ + uasm_i_dsrl_safe(p, tmp, tmp, PUD_SHIFT - 3); /* get pud offset in bytes */ + uasm_i_andi(p, tmp, tmp, (PTRS_PER_PUD - 1) << 3); + uasm_i_daddu(p, ptr, ptr, tmp); /* add in pud offset */ +#endif #ifndef __PAGETABLE_PMD_FOLDED uasm_i_dmfc0(p, tmp, C0_BADVADDR); /* get faulting address */ uasm_i_ld(p, ptr, 0, ptr); /* get pmd pointer */ @@ -1184,6 +1191,21 @@ build_fast_tlb_refill_handler (u32 **p, struct uasm_label **l, uasm_i_ld(p, LOC_PTEP, 0, ptr); /* get pmd pointer */ } +#ifndef __PAGETABLE_PUD_FOLDED + /* get pud offset in bytes */ + uasm_i_dsrl_safe(p, scratch, tmp, PUD_SHIFT - 3); + uasm_i_andi(p, scratch, scratch, (PTRS_PER_PUD - 1) << 3); + + if (use_lwx_insns()) { + UASM_i_LWX(p, ptr, scratch, ptr); + } else { + uasm_i_daddu(p, ptr, ptr, scratch); /* add in pmd offset */ + UASM_i_LW(p, ptr, 0, ptr); + } + /* ptr contains a pointer to PMD entry */ + /* tmp contains the address */ +#endif + #ifndef __PAGETABLE_PMD_FOLDED /* get pmd offset in bytes */ uasm_i_dsrl_safe(p, scratch, tmp, PMD_SHIFT - 3); -- cgit v1.2.3 From 17c99d9421695a0e0de18bf1e7091d859e20ec1d Mon Sep 17 00:00:00 2001 From: Huacai Chen <chenhc@lemote.com> Date: Thu, 16 Mar 2017 21:00:28 +0800 Subject: MIPS: Loongson-3: Select MIPS_L1_CACHE_SHIFT_6 Some newer Loongson-3 have 64 bytes cache lines, so select MIPS_L1_CACHE_SHIFT_6. Signed-off-by: Huacai Chen <chenhc@lemote.com> Cc: John Crispin <john@phrozen.org> Cc: Steven J . Hill <Steven.Hill@caviumnetworks.com> Cc: Fuxin Zhang <zhangfx@lemote.com> Cc: Zhangjin Wu <wuzhangjin@gmail.com> Cc: linux-mips@linux-mips.org Cc: stable@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15755/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> --- arch/mips/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/mips/Kconfig') diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index f4dd2c322d4b..2afb41c52ba0 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -1374,6 +1374,7 @@ config CPU_LOONGSON3 select WEAK_ORDERING select WEAK_REORDERING_BEYOND_LLSC select MIPS_PGD_C0_CONTEXT + select MIPS_L1_CACHE_SHIFT_6 select GPIOLIB help The Loongson 3 processor implements the MIPS64R2 instruction -- cgit v1.2.3 From f9c4e3a6dae1a3a15055ea478438cdc0352e1af2 Mon Sep 17 00:00:00 2001 From: James Cowgill <James.Cowgill@imgtec.com> Date: Fri, 31 Mar 2017 17:09:58 +0100 Subject: MIPS: Opt into HAVE_COPY_THREAD_TLS This the mips version of commit c1bd55f922a2d ("x86: opt into HAVE_COPY_THREAD_TLS, for both 32-bit and 64-bit"). Simply use the tls system call argument instead of extracting the tls argument by magic from the pt_regs structure. See commit 3033f14ab78c3 ("clone: support passing tls argument via C rather than pt_regs magic") for more background. Signed-off-by: James Cowgill <James.Cowgill@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/15855/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> --- arch/mips/Kconfig | 1 + arch/mips/kernel/process.c | 6 +++--- 2 files changed, 4 insertions(+), 3 deletions(-) (limited to 'arch/mips/Kconfig') diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 2afb41c52ba0..52d81ca6f74e 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -70,6 +70,7 @@ config MIPS select HAVE_EXIT_THREAD select HAVE_REGS_AND_STACK_ACCESS_API select HAVE_ARCH_HARDENED_USERCOPY + select HAVE_COPY_THREAD_TLS menu "Machine selection" diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c index b68e10fc453d..918d4c73e951 100644 --- a/arch/mips/kernel/process.c +++ b/arch/mips/kernel/process.c @@ -114,8 +114,8 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) /* * Copy architecture-specific thread state */ -int copy_thread(unsigned long clone_flags, unsigned long usp, - unsigned long kthread_arg, struct task_struct *p) +int copy_thread_tls(unsigned long clone_flags, unsigned long usp, + unsigned long kthread_arg, struct task_struct *p, unsigned long tls) { struct thread_info *ti = task_thread_info(p); struct pt_regs *childregs, *regs = current_pt_regs(); @@ -176,7 +176,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, atomic_set(&p->thread.bd_emu_frame, BD_EMUFRAME_NONE); if (clone_flags & CLONE_SETTLS) - ti->tp_value = regs->regs[7]; + ti->tp_value = tls; return 0; } -- cgit v1.2.3 From ca452b95e3be1cbd86ee60165de640d27ddca8b7 Mon Sep 17 00:00:00 2001 From: Paul Burton <paul.burton@imgtec.com> Date: Thu, 30 Mar 2017 13:51:59 -0700 Subject: MIPS: Remove CONFIG_ARCH_HAS_ILOG2_U{32,64} We declare CONFIG_ARCH_HAS_ILOG2_U32 & CONFIG_ARCH_HAS_ILOG2_U64 in Kconfig, but they are always false since nothing ever selects them. The generic fls-based implementation is efficient for MIPS anyway. Remove the redundant Kconfig entries. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: trivial@kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15840/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> --- arch/mips/Kconfig | 8 -------- 1 file changed, 8 deletions(-) (limited to 'arch/mips/Kconfig') diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 52d81ca6f74e..1f8ebdf75734 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -1042,14 +1042,6 @@ config RWSEM_GENERIC_SPINLOCK config RWSEM_XCHGADD_ALGORITHM bool -config ARCH_HAS_ILOG2_U32 - bool - default n - -config ARCH_HAS_ILOG2_U64 - bool - default n - config GENERIC_HWEIGHT bool default y -- cgit v1.2.3