From c28573744b74eb6de19add503d6a986795c4c137 Mon Sep 17 00:00:00 2001 From: Nicholas Piggin Date: Thu, 2 Dec 2021 00:41:51 +1000 Subject: powerpc/64s: Make hash MMU support configurable This adds Kconfig selection which allows 64s hash MMU support to be disabled. It can be disabled if radix support is enabled, the minimum supported CPU type is POWER9 (or higher), and KVM is not selected. Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20211201144153.2456614-17-npiggin@gmail.com --- drivers/misc/cxl/Kconfig | 1 + drivers/misc/lkdtm/Makefile | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/misc') diff --git a/drivers/misc/cxl/Kconfig b/drivers/misc/cxl/Kconfig index 51aecafdcbdf..5efc4151bf58 100644 --- a/drivers/misc/cxl/Kconfig +++ b/drivers/misc/cxl/Kconfig @@ -6,6 +6,7 @@ config CXL_BASE bool select PPC_COPRO_BASE + select PPC_64S_HASH_MMU config CXL tristate "Support for IBM Coherent Accelerators (CXL)" diff --git a/drivers/misc/lkdtm/Makefile b/drivers/misc/lkdtm/Makefile index aa12097668d3..83a7baf5df82 100644 --- a/drivers/misc/lkdtm/Makefile +++ b/drivers/misc/lkdtm/Makefile @@ -11,7 +11,7 @@ lkdtm-$(CONFIG_LKDTM) += usercopy.o lkdtm-$(CONFIG_LKDTM) += stackleak.o lkdtm-$(CONFIG_LKDTM) += cfi.o lkdtm-$(CONFIG_LKDTM) += fortify.o -lkdtm-$(CONFIG_PPC_BOOK3S_64) += powerpc.o +lkdtm-$(CONFIG_PPC_64S_HASH_MMU) += powerpc.o KASAN_SANITIZE_rodata.o := n KASAN_SANITIZE_stackleak.o := n -- cgit v1.2.3 From 387e220a2e5e630794e1f5219ed6f11e56271c21 Mon Sep 17 00:00:00 2001 From: Nicholas Piggin Date: Thu, 2 Dec 2021 00:41:52 +1000 Subject: powerpc/64s: Move hash MMU support code under CONFIG_PPC_64S_HASH_MMU Compiling out hash support code when CONFIG_PPC_64S_HASH_MMU=n saves 128kB kernel image size (90kB text) on powernv_defconfig minus KVM, 350kB on pseries_defconfig minus KVM, 40kB on a tiny config. Signed-off-by: Nicholas Piggin [mpe: Fixup defined(ARCH_HAS_MEMREMAP_COMPAT_ALIGN), which needs CONFIG. Fix radix_enabled() use in setup_initial_memory_limit(). Add some stubs to reduce number of ifdefs.] Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20211201144153.2456614-18-npiggin@gmail.com --- arch/powerpc/Kconfig | 2 +- arch/powerpc/include/asm/book3s/64/mmu-hash.h | 8 +++++- arch/powerpc/include/asm/book3s/64/mmu.h | 21 ++++++++++++-- arch/powerpc/include/asm/book3s/64/tlbflush-hash.h | 6 ++++ arch/powerpc/include/asm/book3s/pgtable.h | 4 +++ arch/powerpc/include/asm/mmu_context.h | 2 ++ arch/powerpc/include/asm/paca.h | 8 ++++++ arch/powerpc/kernel/asm-offsets.c | 2 ++ arch/powerpc/kernel/entry_64.S | 4 +-- arch/powerpc/kernel/exceptions-64s.S | 16 +++++++++++ arch/powerpc/kernel/mce.c | 2 +- arch/powerpc/kernel/mce_power.c | 10 +++++-- arch/powerpc/kernel/paca.c | 18 +++++------- arch/powerpc/kernel/process.c | 13 +++++---- arch/powerpc/kernel/prom.c | 2 +- arch/powerpc/kernel/setup_64.c | 2 +- arch/powerpc/kexec/core_64.c | 4 +-- arch/powerpc/kexec/ranges.c | 2 +- arch/powerpc/mm/book3s64/Makefile | 15 ++++++---- arch/powerpc/mm/book3s64/hugetlbpage.c | 2 ++ arch/powerpc/mm/book3s64/mmu_context.c | 32 ++++++++++++++++++---- arch/powerpc/mm/book3s64/pgtable.c | 2 +- arch/powerpc/mm/book3s64/radix_pgtable.c | 4 ++- arch/powerpc/mm/copro_fault.c | 2 ++ arch/powerpc/mm/ptdump/Makefile | 2 +- arch/powerpc/platforms/powernv/idle.c | 2 ++ arch/powerpc/platforms/powernv/setup.c | 2 ++ arch/powerpc/platforms/pseries/lpar.c | 11 ++++++-- arch/powerpc/platforms/pseries/lparcfg.c | 2 +- arch/powerpc/platforms/pseries/mobility.c | 4 +++ arch/powerpc/platforms/pseries/pseries.h | 5 ++++ arch/powerpc/platforms/pseries/ras.c | 2 ++ arch/powerpc/platforms/pseries/setup.c | 6 ++-- arch/powerpc/xmon/xmon.c | 8 ++++-- drivers/misc/lkdtm/core.c | 2 +- 35 files changed, 172 insertions(+), 57 deletions(-) (limited to 'drivers/misc') diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 2555563efff0..0631c9241af3 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -129,7 +129,7 @@ config PPC select ARCH_HAS_KCOV select ARCH_HAS_MEMBARRIER_CALLBACKS select ARCH_HAS_MEMBARRIER_SYNC_CORE - select ARCH_HAS_MEMREMAP_COMPAT_ALIGN if PPC_BOOK3S_64 + select ARCH_HAS_MEMREMAP_COMPAT_ALIGN if PPC_64S_HASH_MMU select ARCH_HAS_MMIOWB if PPC64 select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE select ARCH_HAS_PHYS_TO_DMA diff --git a/arch/powerpc/include/asm/book3s/64/mmu-hash.h b/arch/powerpc/include/asm/book3s/64/mmu-hash.h index 3004f3323144..21f780942911 100644 --- a/arch/powerpc/include/asm/book3s/64/mmu-hash.h +++ b/arch/powerpc/include/asm/book3s/64/mmu-hash.h @@ -523,8 +523,14 @@ void slb_save_contents(struct slb_entry *slb_ptr); void slb_dump_contents(struct slb_entry *slb_ptr); extern void slb_vmalloc_update(void); -extern void slb_set_size(u16 size); void preload_new_slb_context(unsigned long start, unsigned long sp); + +#ifdef CONFIG_PPC_64S_HASH_MMU +void slb_set_size(u16 size); +#else +static inline void slb_set_size(u16 size) { } +#endif + #endif /* __ASSEMBLY__ */ /* diff --git a/arch/powerpc/include/asm/book3s/64/mmu.h b/arch/powerpc/include/asm/book3s/64/mmu.h index a265c5618ce8..7fee46e50377 100644 --- a/arch/powerpc/include/asm/book3s/64/mmu.h +++ b/arch/powerpc/include/asm/book3s/64/mmu.h @@ -105,7 +105,9 @@ typedef struct { * from EA and new context ids to build the new VAs. */ mm_context_id_t id; +#ifdef CONFIG_PPC_64S_HASH_MMU mm_context_id_t extended_id[TASK_SIZE_USER64/TASK_CONTEXT_SIZE]; +#endif }; /* Number of bits in the mm_cpumask */ @@ -117,7 +119,9 @@ typedef struct { /* Number of user space windows opened in process mm_context */ atomic_t vas_windows; +#ifdef CONFIG_PPC_64S_HASH_MMU struct hash_mm_context *hash_context; +#endif void __user *vdso; /* @@ -140,6 +144,7 @@ typedef struct { #endif } mm_context_t; +#ifdef CONFIG_PPC_64S_HASH_MMU static inline u16 mm_ctx_user_psize(mm_context_t *ctx) { return ctx->hash_context->user_psize; @@ -200,8 +205,15 @@ static inline struct subpage_prot_table *mm_ctx_subpage_prot(mm_context_t *ctx) extern int mmu_linear_psize; extern int mmu_virtual_psize; extern int mmu_vmalloc_psize; -extern int mmu_vmemmap_psize; extern int mmu_io_psize; +#else /* CONFIG_PPC_64S_HASH_MMU */ +#ifdef CONFIG_PPC_64K_PAGES +#define mmu_virtual_psize MMU_PAGE_64K +#else +#define mmu_virtual_psize MMU_PAGE_4K +#endif +#endif +extern int mmu_vmemmap_psize; /* MMU initialization */ void mmu_early_init_devtree(void); @@ -240,8 +252,9 @@ static inline void setup_initial_memory_limit(phys_addr_t first_memblock_base, * know which translations we will pick. Hence go with hash * restrictions. */ - return hash__setup_initial_memory_limit(first_memblock_base, - first_memblock_size); + if (!early_radix_enabled()) + hash__setup_initial_memory_limit(first_memblock_base, + first_memblock_size); } #ifdef CONFIG_PPC_PSERIES @@ -262,6 +275,7 @@ static inline void radix_init_pseries(void) { } void cleanup_cpu_mmu_context(void); #endif +#ifdef CONFIG_PPC_64S_HASH_MMU static inline int get_user_context(mm_context_t *ctx, unsigned long ea) { int index = ea >> MAX_EA_BITS_PER_CONTEXT; @@ -281,6 +295,7 @@ static inline unsigned long get_user_vsid(mm_context_t *ctx, return get_vsid(context, ea, ssize); } +#endif #endif /* __ASSEMBLY__ */ #endif /* _ASM_POWERPC_BOOK3S_64_MMU_H_ */ diff --git a/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h b/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h index 3b95769739c7..8b762f282190 100644 --- a/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h +++ b/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h @@ -112,8 +112,14 @@ static inline void hash__flush_tlb_kernel_range(unsigned long start, struct mmu_gather; extern void hash__tlb_flush(struct mmu_gather *tlb); +void flush_tlb_pmd_range(struct mm_struct *mm, pmd_t *pmd, unsigned long addr); + +#ifdef CONFIG_PPC_64S_HASH_MMU /* Private function for use by PCI IO mapping code */ extern void __flush_hash_table_range(unsigned long start, unsigned long end); extern void flush_tlb_pmd_range(struct mm_struct *mm, pmd_t *pmd, unsigned long addr); +#else +static inline void __flush_hash_table_range(unsigned long start, unsigned long end) { } +#endif #endif /* _ASM_POWERPC_BOOK3S_64_TLBFLUSH_HASH_H */ diff --git a/arch/powerpc/include/asm/book3s/pgtable.h b/arch/powerpc/include/asm/book3s/pgtable.h index ad130e15a126..e8269434ecbe 100644 --- a/arch/powerpc/include/asm/book3s/pgtable.h +++ b/arch/powerpc/include/asm/book3s/pgtable.h @@ -25,6 +25,7 @@ extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, unsigned long size, pgprot_t vma_prot); #define __HAVE_PHYS_MEM_ACCESS_PROT +#if defined(CONFIG_PPC32) || defined(CONFIG_PPC_64S_HASH_MMU) /* * This gets called at the end of handling a page fault, when * the kernel has put a new PTE into the page table for the process. @@ -35,6 +36,9 @@ extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, * waiting for the inevitable extra hash-table miss exception. */ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t *ptep); +#else +static inline void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t *ptep) {} +#endif #endif /* __ASSEMBLY__ */ #endif diff --git a/arch/powerpc/include/asm/mmu_context.h b/arch/powerpc/include/asm/mmu_context.h index 9ba6b585337f..e46394d27785 100644 --- a/arch/powerpc/include/asm/mmu_context.h +++ b/arch/powerpc/include/asm/mmu_context.h @@ -75,6 +75,7 @@ extern void hash__reserve_context_id(int id); extern void __destroy_context(int context_id); static inline void mmu_context_init(void) { } +#ifdef CONFIG_PPC_64S_HASH_MMU static inline int alloc_extended_context(struct mm_struct *mm, unsigned long ea) { @@ -100,6 +101,7 @@ static inline bool need_extra_context(struct mm_struct *mm, unsigned long ea) return true; return false; } +#endif #else extern void switch_mmu_context(struct mm_struct *prev, struct mm_struct *next, diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h index dc05a862e72a..295573a82c66 100644 --- a/arch/powerpc/include/asm/paca.h +++ b/arch/powerpc/include/asm/paca.h @@ -97,7 +97,9 @@ struct paca_struct { /* this becomes non-zero. */ u8 kexec_state; /* set when kexec down has irqs off */ #ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU struct slb_shadow *slb_shadow_ptr; +#endif struct dtl_entry *dispatch_log; struct dtl_entry *dispatch_log_end; #endif @@ -110,6 +112,7 @@ struct paca_struct { /* used for most interrupts/exceptions */ u64 exgen[EX_SIZE] __attribute__((aligned(0x80))); +#ifdef CONFIG_PPC_64S_HASH_MMU /* SLB related definitions */ u16 vmalloc_sllp; u8 slb_cache_ptr; @@ -120,6 +123,7 @@ struct paca_struct { u32 slb_used_bitmap; /* Bitmaps for first 32 SLB entries. */ u32 slb_kern_bitmap; u32 slb_cache[SLB_CACHE_ENTRIES]; +#endif #endif /* CONFIG_PPC_BOOK3S_64 */ #ifdef CONFIG_PPC_BOOK3E @@ -149,6 +153,7 @@ struct paca_struct { #endif /* CONFIG_PPC_BOOK3E */ #ifdef CONFIG_PPC_BOOK3S +#ifdef CONFIG_PPC_64S_HASH_MMU #ifdef CONFIG_PPC_MM_SLICES unsigned char mm_ctx_low_slices_psize[BITS_PER_LONG / BITS_PER_BYTE]; unsigned char mm_ctx_high_slices_psize[SLICE_ARRAY_SIZE]; @@ -156,6 +161,7 @@ struct paca_struct { u16 mm_ctx_user_psize; u16 mm_ctx_sllp; #endif +#endif #endif /* @@ -268,9 +274,11 @@ struct paca_struct { #endif /* CONFIG_PPC_PSERIES */ #ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU /* Capture SLB related old contents in MCE handler. */ struct slb_entry *mce_faulty_slbs; u16 slb_save_cache_ptr; +#endif #endif /* CONFIG_PPC_BOOK3S_64 */ #ifdef CONFIG_STACKPROTECTOR unsigned long canary; diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index cc05522f50bf..b823f484c640 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -218,10 +218,12 @@ int main(void) OFFSET(PACA_EXGEN, paca_struct, exgen); OFFSET(PACA_EXMC, paca_struct, exmc); OFFSET(PACA_EXNMI, paca_struct, exnmi); +#ifdef CONFIG_PPC_64S_HASH_MMU OFFSET(PACA_SLBSHADOWPTR, paca_struct, slb_shadow_ptr); OFFSET(SLBSHADOW_STACKVSID, slb_shadow, save_area[SLB_NUM_BOLTED - 1].vsid); OFFSET(SLBSHADOW_STACKESID, slb_shadow, save_area[SLB_NUM_BOLTED - 1].esid); OFFSET(SLBSHADOW_SAVEAREA, slb_shadow, save_area); +#endif OFFSET(LPPACA_PMCINUSE, lppaca, pmcregs_in_use); #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE OFFSET(PACA_PMCINUSE, paca_struct, pmcregs_in_use); diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index 70cff7b49e17..9581906b5ee9 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -180,7 +180,7 @@ _GLOBAL(_switch) #endif ld r8,KSP(r4) /* new stack pointer */ -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU BEGIN_MMU_FTR_SECTION b 2f END_MMU_FTR_SECTION_IFSET(MMU_FTR_TYPE_RADIX) @@ -232,7 +232,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S) slbmte r7,r0 isync 2: -#endif /* CONFIG_PPC_BOOK3S_64 */ +#endif /* CONFIG_PPC_64S_HASH_MMU */ clrrdi r7, r8, THREAD_SHIFT /* base of new stack */ /* Note: this uses SWITCH_FRAME_SIZE rather than INT_FRAME_SIZE diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index 2acd7e66694e..a30f563bc7a8 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -1367,11 +1367,15 @@ EXC_COMMON_BEGIN(data_access_common) addi r3,r1,STACK_FRAME_OVERHEAD andis. r0,r4,DSISR_DABRMATCH@h bne- 1f +#ifdef CONFIG_PPC_64S_HASH_MMU BEGIN_MMU_FTR_SECTION bl do_hash_fault MMU_FTR_SECTION_ELSE bl do_page_fault ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX) +#else + bl do_page_fault +#endif b interrupt_return_srr 1: bl do_break @@ -1414,6 +1418,7 @@ EXC_VIRT_BEGIN(data_access_slb, 0x4380, 0x80) EXC_VIRT_END(data_access_slb, 0x4380, 0x80) EXC_COMMON_BEGIN(data_access_slb_common) GEN_COMMON data_access_slb +#ifdef CONFIG_PPC_64S_HASH_MMU BEGIN_MMU_FTR_SECTION /* HPT case, do SLB fault */ addi r3,r1,STACK_FRAME_OVERHEAD @@ -1426,6 +1431,9 @@ MMU_FTR_SECTION_ELSE /* Radix case, access is outside page table range */ li r3,-EFAULT ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX) +#else + li r3,-EFAULT +#endif std r3,RESULT(r1) addi r3,r1,STACK_FRAME_OVERHEAD bl do_bad_segment_interrupt @@ -1460,11 +1468,15 @@ EXC_VIRT_END(instruction_access, 0x4400, 0x80) EXC_COMMON_BEGIN(instruction_access_common) GEN_COMMON instruction_access addi r3,r1,STACK_FRAME_OVERHEAD +#ifdef CONFIG_PPC_64S_HASH_MMU BEGIN_MMU_FTR_SECTION bl do_hash_fault MMU_FTR_SECTION_ELSE bl do_page_fault ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX) +#else + bl do_page_fault +#endif b interrupt_return_srr @@ -1494,6 +1506,7 @@ EXC_VIRT_BEGIN(instruction_access_slb, 0x4480, 0x80) EXC_VIRT_END(instruction_access_slb, 0x4480, 0x80) EXC_COMMON_BEGIN(instruction_access_slb_common) GEN_COMMON instruction_access_slb +#ifdef CONFIG_PPC_64S_HASH_MMU BEGIN_MMU_FTR_SECTION /* HPT case, do SLB fault */ addi r3,r1,STACK_FRAME_OVERHEAD @@ -1506,6 +1519,9 @@ MMU_FTR_SECTION_ELSE /* Radix case, access is outside page table range */ li r3,-EFAULT ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX) +#else + li r3,-EFAULT +#endif std r3,RESULT(r1) addi r3,r1,STACK_FRAME_OVERHEAD bl do_bad_segment_interrupt diff --git a/arch/powerpc/kernel/mce.c b/arch/powerpc/kernel/mce.c index fd829f7f25a4..2503dd4713b9 100644 --- a/arch/powerpc/kernel/mce.c +++ b/arch/powerpc/kernel/mce.c @@ -586,7 +586,7 @@ void machine_check_print_event_info(struct machine_check_event *evt, mc_error_class[evt->error_class] : "Unknown"; printk("%sMCE: CPU%d: %s\n", level, evt->cpu, subtype); -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU /* Display faulty slb contents for SLB errors. */ if (evt->error_type == MCE_ERROR_TYPE_SLB && !in_guest) slb_dump_contents(local_paca->mce_faulty_slbs); diff --git a/arch/powerpc/kernel/mce_power.c b/arch/powerpc/kernel/mce_power.c index cf5263b648fc..a48ff18d6d65 100644 --- a/arch/powerpc/kernel/mce_power.c +++ b/arch/powerpc/kernel/mce_power.c @@ -77,7 +77,7 @@ static bool mce_in_guest(void) } /* flush SLBs and reload */ -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU void flush_and_reload_slb(void) { if (early_radix_enabled()) @@ -99,7 +99,7 @@ void flush_and_reload_slb(void) void flush_erat(void) { -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU if (!early_cpu_has_feature(CPU_FTR_ARCH_300)) { flush_and_reload_slb(); return; @@ -114,7 +114,7 @@ void flush_erat(void) static int mce_flush(int what) { -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU if (what == MCE_FLUSH_SLB) { flush_and_reload_slb(); return 1; @@ -499,8 +499,10 @@ static int mce_handle_ierror(struct pt_regs *regs, unsigned long srr1, /* attempt to correct the error */ switch (table[i].error_type) { case MCE_ERROR_TYPE_SLB: +#ifdef CONFIG_PPC_64S_HASH_MMU if (local_paca->in_mce == 1) slb_save_contents(local_paca->mce_faulty_slbs); +#endif handled = mce_flush(MCE_FLUSH_SLB); break; case MCE_ERROR_TYPE_ERAT: @@ -588,8 +590,10 @@ static int mce_handle_derror(struct pt_regs *regs, /* attempt to correct the error */ switch (table[i].error_type) { case MCE_ERROR_TYPE_SLB: +#ifdef CONFIG_PPC_64S_HASH_MMU if (local_paca->in_mce == 1) slb_save_contents(local_paca->mce_faulty_slbs); +#endif if (mce_flush(MCE_FLUSH_SLB)) handled = 1; break; diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c index 4208b4044d12..39da688a9455 100644 --- a/arch/powerpc/kernel/paca.c +++ b/arch/powerpc/kernel/paca.c @@ -139,8 +139,7 @@ static struct lppaca * __init new_lppaca(int cpu, unsigned long limit) } #endif /* CONFIG_PPC_PSERIES */ -#ifdef CONFIG_PPC_BOOK3S_64 - +#ifdef CONFIG_PPC_64S_HASH_MMU /* * 3 persistent SLBs are allocated here. The buffer will be zero * initially, hence will all be invaild until we actually write them. @@ -169,8 +168,7 @@ static struct slb_shadow * __init new_slb_shadow(int cpu, unsigned long limit) return s; } - -#endif /* CONFIG_PPC_BOOK3S_64 */ +#endif /* CONFIG_PPC_64S_HASH_MMU */ #ifdef CONFIG_PPC_PSERIES /** @@ -226,7 +224,7 @@ void __init initialise_paca(struct paca_struct *new_paca, int cpu) new_paca->kexec_state = KEXEC_STATE_NONE; new_paca->__current = &init_task; new_paca->data_offset = 0xfeeeeeeeeeeeeeeeULL; -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU new_paca->slb_shadow_ptr = NULL; #endif @@ -307,7 +305,7 @@ void __init allocate_paca(int cpu) #ifdef CONFIG_PPC_PSERIES paca->lppaca_ptr = new_lppaca(cpu, limit); #endif -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU paca->slb_shadow_ptr = new_slb_shadow(cpu, limit); #endif #ifdef CONFIG_PPC_PSERIES @@ -328,7 +326,7 @@ void __init free_unused_pacas(void) paca_nr_cpu_ids = nr_cpu_ids; paca_ptrs_size = new_ptrs_size; -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU if (early_radix_enabled()) { /* Ugly fixup, see new_slb_shadow() */ memblock_phys_free(__pa(paca_ptrs[boot_cpuid]->slb_shadow_ptr), @@ -341,9 +339,9 @@ void __init free_unused_pacas(void) paca_ptrs_size + paca_struct_size, nr_cpu_ids); } +#ifdef CONFIG_PPC_64S_HASH_MMU void copy_mm_to_paca(struct mm_struct *mm) { -#ifdef CONFIG_PPC_BOOK3S mm_context_t *context = &mm->context; #ifdef CONFIG_PPC_MM_SLICES @@ -356,7 +354,5 @@ void copy_mm_to_paca(struct mm_struct *mm) get_paca()->mm_ctx_user_psize = context->user_psize; get_paca()->mm_ctx_sllp = context->sllp; #endif -#else /* !CONFIG_PPC_BOOK3S */ - return; -#endif } +#endif /* CONFIG_PPC_64S_HASH_MMU */ diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 5d2333d2a283..a64cfbb85ca2 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -1240,7 +1240,7 @@ struct task_struct *__switch_to(struct task_struct *prev, { struct thread_struct *new_thread, *old_thread; struct task_struct *last; -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU struct ppc64_tlb_batch *batch; #endif @@ -1249,7 +1249,7 @@ struct task_struct *__switch_to(struct task_struct *prev, WARN_ON(!irqs_disabled()); -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU batch = this_cpu_ptr(&ppc64_tlb_batch); if (batch->active) { current_thread_info()->local_flags |= _TLF_LAZY_MMU; @@ -1328,6 +1328,7 @@ struct task_struct *__switch_to(struct task_struct *prev, */ #ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU /* * This applies to a process that was context switched while inside * arch_enter_lazy_mmu_mode(), to re-activate the batch that was @@ -1339,6 +1340,7 @@ struct task_struct *__switch_to(struct task_struct *prev, batch = this_cpu_ptr(&ppc64_tlb_batch); batch->active = 1; } +#endif /* * Math facilities are masked out of the child MSR in copy_thread. @@ -1689,7 +1691,7 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) static void setup_ksp_vsid(struct task_struct *p, unsigned long sp) { -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU unsigned long sp_vsid; unsigned long llp = mmu_psize_defs[mmu_linear_psize].sllp; @@ -2333,10 +2335,9 @@ unsigned long arch_randomize_brk(struct mm_struct *mm) * the heap, we can put it above 1TB so it is backed by a 1TB * segment. Otherwise the heap will be in the bottom 1TB * which always uses 256MB segments and this may result in a - * performance penalty. We don't need to worry about radix. For - * radix, mmu_highuser_ssize remains unchanged from 256MB. + * performance penalty. */ - if (!is_32bit_task() && (mmu_highuser_ssize == MMU_SEGSIZE_1T)) + if (!radix_enabled() && !is_32bit_task() && (mmu_highuser_ssize == MMU_SEGSIZE_1T)) base = max_t(unsigned long, mm->brk, 1UL << SID_SHIFT_1T); #endif diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index 2e67588f6f6e..75678ff04dd7 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -231,7 +231,7 @@ static void __init check_cpu_pa_features(unsigned long node) ibm_pa_features, ARRAY_SIZE(ibm_pa_features)); } -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU static void __init init_mmu_slb_size(unsigned long node) { const __be32 *slb_size_ptr; diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index 9a493796ce66..703a2e6ab08d 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -886,7 +886,7 @@ void __init setup_per_cpu_areas(void) atom_size = SZ_1M; } else if (radix_enabled()) { atom_size = PAGE_SIZE; - } else { + } else if (IS_ENABLED(CONFIG_PPC_64S_HASH_MMU)) { /* * Linear mapping is one of 4K, 1M and 16M. For 4K, no need * to group units. For larger mappings, use 1M atom which diff --git a/arch/powerpc/kexec/core_64.c b/arch/powerpc/kexec/core_64.c index 66678518b938..635b5fc30b53 100644 --- a/arch/powerpc/kexec/core_64.c +++ b/arch/powerpc/kexec/core_64.c @@ -378,7 +378,7 @@ void default_machine_kexec(struct kimage *image) /* NOTREACHED */ } -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU /* Values we need to export to the second kernel via the device tree. */ static unsigned long htab_base; static unsigned long htab_size; @@ -420,4 +420,4 @@ static int __init export_htab_values(void) return 0; } late_initcall(export_htab_values); -#endif /* CONFIG_PPC_BOOK3S_64 */ +#endif /* CONFIG_PPC_64S_HASH_MMU */ diff --git a/arch/powerpc/kexec/ranges.c b/arch/powerpc/kexec/ranges.c index 6b81c852feab..563e9989a5bf 100644 --- a/arch/powerpc/kexec/ranges.c +++ b/arch/powerpc/kexec/ranges.c @@ -296,7 +296,7 @@ int add_initrd_mem_range(struct crash_mem **mem_ranges) return ret; } -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU /** * add_htab_mem_range - Adds htab range to the given memory ranges list, * if it exists diff --git a/arch/powerpc/mm/book3s64/Makefile b/arch/powerpc/mm/book3s64/Makefile index 501efadb287f..2d50cac499c5 100644 --- a/arch/powerpc/mm/book3s64/Makefile +++ b/arch/powerpc/mm/book3s64/Makefile @@ -2,20 +2,23 @@ ccflags-y := $(NO_MINIMAL_TOC) +obj-y += mmu_context.o pgtable.o trace.o +ifdef CONFIG_PPC_64S_HASH_MMU CFLAGS_REMOVE_slb.o = $(CC_FLAGS_FTRACE) - -obj-y += hash_pgtable.o hash_utils.o slb.o \ - mmu_context.o pgtable.o hash_tlb.o trace.o +obj-y += hash_pgtable.o hash_utils.o hash_tlb.o slb.o obj-$(CONFIG_PPC_HASH_MMU_NATIVE) += hash_native.o -obj-$(CONFIG_PPC_RADIX_MMU) += radix_pgtable.o radix_tlb.o obj-$(CONFIG_PPC_4K_PAGES) += hash_4k.o obj-$(CONFIG_PPC_64K_PAGES) += hash_64k.o +obj-$(CONFIG_TRANSPARENT_HUGEPAGE) += hash_hugepage.o +obj-$(CONFIG_PPC_SUBPAGE_PROT) += subpage_prot.o +endif + obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o + +obj-$(CONFIG_PPC_RADIX_MMU) += radix_pgtable.o radix_tlb.o ifdef CONFIG_HUGETLB_PAGE obj-$(CONFIG_PPC_RADIX_MMU) += radix_hugetlbpage.o endif -obj-$(CONFIG_TRANSPARENT_HUGEPAGE) += hash_hugepage.o -obj-$(CONFIG_PPC_SUBPAGE_PROT) += subpage_prot.o obj-$(CONFIG_SPAPR_TCE_IOMMU) += iommu_api.o obj-$(CONFIG_PPC_PKEY) += pkeys.o diff --git a/arch/powerpc/mm/book3s64/hugetlbpage.c b/arch/powerpc/mm/book3s64/hugetlbpage.c index a688e1324ae5..95b2a283fd6e 100644 --- a/arch/powerpc/mm/book3s64/hugetlbpage.c +++ b/arch/powerpc/mm/book3s64/hugetlbpage.c @@ -16,6 +16,7 @@ unsigned int hpage_shift; EXPORT_SYMBOL(hpage_shift); +#ifdef CONFIG_PPC_64S_HASH_MMU int __hash_page_huge(unsigned long ea, unsigned long access, unsigned long vsid, pte_t *ptep, unsigned long trap, unsigned long flags, int ssize, unsigned int shift, unsigned int mmu_psize) @@ -122,6 +123,7 @@ int __hash_page_huge(unsigned long ea, unsigned long access, unsigned long vsid, *ptep = __pte(new_pte & ~H_PAGE_BUSY); return 0; } +#endif pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) diff --git a/arch/powerpc/mm/book3s64/mmu_context.c b/arch/powerpc/mm/book3s64/mmu_context.c index c10fc8a72fb3..24aa953c9311 100644 --- a/arch/powerpc/mm/book3s64/mmu_context.c +++ b/arch/powerpc/mm/book3s64/mmu_context.c @@ -31,6 +31,7 @@ static int alloc_context_id(int min_id, int max_id) return ida_alloc_range(&mmu_context_ida, min_id, max_id, GFP_KERNEL); } +#ifdef CONFIG_PPC_64S_HASH_MMU void hash__reserve_context_id(int id) { int result = ida_alloc_range(&mmu_context_ida, id, id, GFP_KERNEL); @@ -50,7 +51,9 @@ int hash__alloc_context_id(void) return alloc_context_id(MIN_USER_CONTEXT, max); } EXPORT_SYMBOL_GPL(hash__alloc_context_id); +#endif +#ifdef CONFIG_PPC_64S_HASH_MMU static int realloc_context_ids(mm_context_t *ctx) { int i, id; @@ -150,6 +153,13 @@ void hash__setup_new_exec(void) slb_setup_new_exec(); } +#else +static inline int hash__init_new_context(struct mm_struct *mm) +{ + BUILD_BUG(); + return 0; +} +#endif static int radix__init_new_context(struct mm_struct *mm) { @@ -175,7 +185,9 @@ static int radix__init_new_context(struct mm_struct *mm) */ asm volatile("ptesync;isync" : : : "memory"); +#ifdef CONFIG_PPC_64S_HASH_MMU mm->context.hash_context = NULL; +#endif return index; } @@ -213,14 +225,22 @@ EXPORT_SYMBOL_GPL(__destroy_context); static void destroy_contexts(mm_context_t *ctx) { - int index, context_id; + if (radix_enabled()) { + ida_free(&mmu_context_ida, ctx->id); + } else { +#ifdef CONFIG_PPC_64S_HASH_MMU + int index, context_id; - for (index = 0; index < ARRAY_SIZE(ctx->extended_id); index++) { - context_id = ctx->extended_id[index]; - if (context_id) - ida_free(&mmu_context_ida, context_id); + for (index = 0; index < ARRAY_SIZE(ctx->extended_id); index++) { + context_id = ctx->extended_id[index]; + if (context_id) + ida_free(&mmu_context_ida, context_id); + } + kfree(ctx->hash_context); +#else + BUILD_BUG(); // radix_enabled() should be constant true +#endif } - kfree(ctx->hash_context); } static void pmd_frag_destroy(void *pmd_frag) diff --git a/arch/powerpc/mm/book3s64/pgtable.c b/arch/powerpc/mm/book3s64/pgtable.c index d3b01f6ba530..79ce3c22a29d 100644 --- a/arch/powerpc/mm/book3s64/pgtable.c +++ b/arch/powerpc/mm/book3s64/pgtable.c @@ -529,7 +529,7 @@ static int __init pgtable_debugfs_setup(void) } arch_initcall(pgtable_debugfs_setup); -#ifdef CONFIG_ZONE_DEVICE +#if defined(CONFIG_ZONE_DEVICE) && defined(CONFIG_ARCH_HAS_MEMREMAP_COMPAT_ALIGN) /* * Override the generic version in mm/memremap.c. * diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c index 1f4afc37843d..3c4f0ebe5df8 100644 --- a/arch/powerpc/mm/book3s64/radix_pgtable.c +++ b/arch/powerpc/mm/book3s64/radix_pgtable.c @@ -334,7 +334,7 @@ static void __init radix_init_pgtable(void) u64 i; /* We don't support slb for radix */ - mmu_slb_size = 0; + slb_set_size(0); /* * Create the linear mapping @@ -565,6 +565,7 @@ void __init radix__early_init_mmu(void) { unsigned long lpcr; +#ifdef CONFIG_PPC_64S_HASH_MMU #ifdef CONFIG_PPC_64K_PAGES /* PAGE_SIZE mappings */ mmu_virtual_psize = MMU_PAGE_64K; @@ -581,6 +582,7 @@ void __init radix__early_init_mmu(void) mmu_vmemmap_psize = MMU_PAGE_2M; } else mmu_vmemmap_psize = mmu_virtual_psize; +#endif #endif /* * initialize page table size diff --git a/arch/powerpc/mm/copro_fault.c b/arch/powerpc/mm/copro_fault.c index 8acd00178956..c1cb21a00884 100644 --- a/arch/powerpc/mm/copro_fault.c +++ b/arch/powerpc/mm/copro_fault.c @@ -82,6 +82,7 @@ out_unlock: } EXPORT_SYMBOL_GPL(copro_handle_mm_fault); +#ifdef CONFIG_PPC_64S_HASH_MMU int copro_calculate_slb(struct mm_struct *mm, u64 ea, struct copro_slb *slb) { u64 vsid, vsidkey; @@ -146,3 +147,4 @@ void copro_flush_all_slbs(struct mm_struct *mm) cxl_slbia(mm); } EXPORT_SYMBOL_GPL(copro_flush_all_slbs); +#endif diff --git a/arch/powerpc/mm/ptdump/Makefile b/arch/powerpc/mm/ptdump/Makefile index 4050cbb55acf..b533caaf0910 100644 --- a/arch/powerpc/mm/ptdump/Makefile +++ b/arch/powerpc/mm/ptdump/Makefile @@ -10,5 +10,5 @@ obj-$(CONFIG_PPC_BOOK3S_64) += book3s64.o ifdef CONFIG_PTDUMP_DEBUGFS obj-$(CONFIG_PPC_BOOK3S_32) += bats.o segment_regs.o -obj-$(CONFIG_PPC_BOOK3S_64) += hashpagetable.o +obj-$(CONFIG_PPC_64S_HASH_MMU) += hashpagetable.o endif diff --git a/arch/powerpc/platforms/powernv/idle.c b/arch/powerpc/platforms/powernv/idle.c index 95458fd9572c..885ef229aba1 100644 --- a/arch/powerpc/platforms/powernv/idle.c +++ b/arch/powerpc/platforms/powernv/idle.c @@ -491,12 +491,14 @@ subcore_woken: mtspr(SPRN_SPRG3, local_paca->sprg_vdso); +#ifdef CONFIG_PPC_64S_HASH_MMU /* * The SLB has to be restored here, but it sometimes still * contains entries, so the __ variant must be used to prevent * multi hits. */ __slb_restore_bolted_realmode(); +#endif return srr1; } diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c index 5ef6b8afb3d0..f37d6524a24d 100644 --- a/arch/powerpc/platforms/powernv/setup.c +++ b/arch/powerpc/platforms/powernv/setup.c @@ -211,6 +211,7 @@ static void __init pnv_init(void) #endif add_preferred_console("hvc", 0, NULL); +#ifdef CONFIG_PPC_64S_HASH_MMU if (!radix_enabled()) { size_t size = sizeof(struct slb_entry) * mmu_slb_size; int i; @@ -223,6 +224,7 @@ static void __init pnv_init(void) cpu_to_node(i)); } } +#endif } static void __init pnv_init_IRQ(void) diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c index 06d6a824c0dc..fac5d86777db 100644 --- a/arch/powerpc/platforms/pseries/lpar.c +++ b/arch/powerpc/platforms/pseries/lpar.c @@ -58,6 +58,7 @@ EXPORT_SYMBOL(plpar_hcall); EXPORT_SYMBOL(plpar_hcall9); EXPORT_SYMBOL(plpar_hcall_norets); +#ifdef CONFIG_PPC_64S_HASH_MMU /* * H_BLOCK_REMOVE supported block size for this page size in segment who's base * page size is that page size. @@ -66,6 +67,7 @@ EXPORT_SYMBOL(plpar_hcall_norets); * page size. */ static int hblkrm_size[MMU_PAGE_COUNT][MMU_PAGE_COUNT] __ro_after_init; +#endif /* * Due to the involved complexity, and that the current hypervisor is only @@ -689,7 +691,7 @@ void vpa_init(int cpu) return; } -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU /* * PAPR says this feature is SLB-Buffer but firmware never * reports that. All SPLPAR support SLB shadow buffer. @@ -702,7 +704,7 @@ void vpa_init(int cpu) "cpu %d (hw %d) of area %lx failed with %ld\n", cpu, hwcpu, addr, ret); } -#endif /* CONFIG_PPC_BOOK3S_64 */ +#endif /* CONFIG_PPC_64S_HASH_MMU */ /* * Register dispatch trace log, if one has been allocated. @@ -740,6 +742,8 @@ static int pseries_lpar_register_process_table(unsigned long base, return rc; } +#ifdef CONFIG_PPC_64S_HASH_MMU + static long pSeries_lpar_hpte_insert(unsigned long hpte_group, unsigned long vpn, unsigned long pa, unsigned long rflags, unsigned long vflags, @@ -1730,6 +1734,7 @@ void __init hpte_init_pseries(void) if (cpu_has_feature(CPU_FTR_ARCH_300)) pseries_lpar_register_process_table(0, 0, 0); } +#endif /* CONFIG_PPC_64S_HASH_MMU */ #ifdef CONFIG_PPC_RADIX_MMU void radix_init_pseries(void) @@ -1932,6 +1937,7 @@ int h_get_mpp_x(struct hvcall_mpp_x_data *mpp_x_data) return rc; } +#ifdef CONFIG_PPC_64S_HASH_MMU static unsigned long vsid_unscramble(unsigned long vsid, int ssize) { unsigned long protovsid; @@ -1992,6 +1998,7 @@ static int __init reserve_vrma_context_id(void) return 0; } machine_device_initcall(pseries, reserve_vrma_context_id); +#endif #ifdef CONFIG_DEBUG_FS /* debugfs file interface for vpa data */ diff --git a/arch/powerpc/platforms/pseries/lparcfg.c b/arch/powerpc/platforms/pseries/lparcfg.c index 3354c00914fa..c7940fcfc911 100644 --- a/arch/powerpc/platforms/pseries/lparcfg.c +++ b/arch/powerpc/platforms/pseries/lparcfg.c @@ -531,7 +531,7 @@ static int pseries_lparcfg_data(struct seq_file *m, void *v) seq_printf(m, "shared_processor_mode=%d\n", lppaca_shared_proc(get_lppaca())); -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU if (!radix_enabled()) seq_printf(m, "slb_size=%d\n", mmu_slb_size); #endif diff --git a/arch/powerpc/platforms/pseries/mobility.c b/arch/powerpc/platforms/pseries/mobility.c index 210a37a065fb..85033f392c78 100644 --- a/arch/powerpc/platforms/pseries/mobility.c +++ b/arch/powerpc/platforms/pseries/mobility.c @@ -451,11 +451,15 @@ static void prod_others(void) static u16 clamp_slb_size(void) { +#ifdef CONFIG_PPC_64S_HASH_MMU u16 prev = mmu_slb_size; slb_set_size(SLB_MIN_SIZE); return prev; +#else + return 0; +#endif } static int do_suspend(void) diff --git a/arch/powerpc/platforms/pseries/pseries.h b/arch/powerpc/platforms/pseries/pseries.h index 3544778e06d0..b4c63c481f33 100644 --- a/arch/powerpc/platforms/pseries/pseries.h +++ b/arch/powerpc/platforms/pseries/pseries.h @@ -113,6 +113,11 @@ int dlpar_workqueue_init(void); extern u32 pseries_security_flavor; void pseries_setup_security_mitigations(void); + +#ifdef CONFIG_PPC_64S_HASH_MMU void pseries_lpar_read_hblkrm_characteristics(void); +#else +static inline void pseries_lpar_read_hblkrm_characteristics(void) { } +#endif #endif /* _PSERIES_PSERIES_H */ diff --git a/arch/powerpc/platforms/pseries/ras.c b/arch/powerpc/platforms/pseries/ras.c index 56092dccfdb8..74c9b1b5bc66 100644 --- a/arch/powerpc/platforms/pseries/ras.c +++ b/arch/powerpc/platforms/pseries/ras.c @@ -526,6 +526,7 @@ static int mce_handle_err_realmode(int disposition, u8 error_type) disposition = RTAS_DISP_FULLY_RECOVERED; break; case MC_ERROR_TYPE_SLB: +#ifdef CONFIG_PPC_64S_HASH_MMU /* * Store the old slb content in paca before flushing. * Print this when we go to virtual mode. @@ -538,6 +539,7 @@ static int mce_handle_err_realmode(int disposition, u8 error_type) slb_save_contents(local_paca->mce_faulty_slbs); flush_and_reload_slb(); disposition = RTAS_DISP_FULLY_RECOVERED; +#endif break; default: break; diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index 8a62af5b9c24..7f69237d4fa4 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -112,7 +112,7 @@ static void __init fwnmi_init(void) u8 *mce_data_buf; unsigned int i; int nr_cpus = num_possible_cpus(); -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU struct slb_entry *slb_ptr; size_t size; #endif @@ -152,7 +152,7 @@ static void __init fwnmi_init(void) (RTAS_ERROR_LOG_MAX * i); } -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU if (!radix_enabled()) { /* Allocate per cpu area to save old slb contents during MCE */ size = sizeof(struct slb_entry) * mmu_slb_size * nr_cpus; @@ -801,7 +801,9 @@ static void __init pSeries_setup_arch(void) fwnmi_init(); pseries_setup_security_mitigations(); +#ifdef CONFIG_PPC_64S_HASH_MMU pseries_lpar_read_hblkrm_characteristics(); +#endif /* By default, only probe PCI (can be overridden by rtas_pci) */ pci_add_flags(PCI_PROBE_ONLY); diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c index 83100c6524cc..0c65dc01c325 100644 --- a/arch/powerpc/xmon/xmon.c +++ b/arch/powerpc/xmon/xmon.c @@ -1159,7 +1159,7 @@ cmds(struct pt_regs *excp) case 'P': show_tasks(); break; -#ifdef CONFIG_PPC_BOOK3S +#if defined(CONFIG_PPC_BOOK3S_32) || defined(CONFIG_PPC_64S_HASH_MMU) case 'u': dump_segments(); break; @@ -2614,7 +2614,7 @@ static void dump_tracing(void) static void dump_one_paca(int cpu) { struct paca_struct *p; -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU int i = 0; #endif @@ -2656,6 +2656,7 @@ static void dump_one_paca(int cpu) DUMP(p, cpu_start, "%#-*x"); DUMP(p, kexec_state, "%#-*x"); #ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU if (!early_radix_enabled()) { for (i = 0; i < SLB_NUM_BOLTED; i++) { u64 esid, vsid; @@ -2683,6 +2684,7 @@ static void dump_one_paca(int cpu) 22, "slb_cache", i, p->slb_cache[i]); } } +#endif DUMP(p, rfi_flush_fallback_area, "%-*px"); #endif @@ -3746,7 +3748,7 @@ static void xmon_print_symbol(unsigned long address, const char *mid, printf("%s", after); } -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU void dump_segments(void) { int i; diff --git a/drivers/misc/lkdtm/core.c b/drivers/misc/lkdtm/core.c index 609d9ee2acc0..82fb276f7e09 100644 --- a/drivers/misc/lkdtm/core.c +++ b/drivers/misc/lkdtm/core.c @@ -182,7 +182,7 @@ static const struct crashtype crashtypes[] = { CRASHTYPE(FORTIFIED_SUBOBJECT), CRASHTYPE(FORTIFIED_STRSCPY), CRASHTYPE(DOUBLE_FAULT), -#ifdef CONFIG_PPC_BOOK3S_64 +#ifdef CONFIG_PPC_64S_HASH_MMU CRASHTYPE(PPC_SLB_MULTIHIT), #endif }; -- cgit v1.2.3 From 30e120e6a9d247cec7effd55fd6783d5c619ed4c Mon Sep 17 00:00:00 2001 From: Minghao Chi Date: Wed, 15 Dec 2021 06:04:38 +0000 Subject: ocxl: remove redundant rc variable Return value from ocxl_context_attach() directly instead of taking this in another redundant variable. Reported-by: Zeal Robot Signed-off-by: Minghao Chi Acked-by: Andrew Donnellan Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20211215060438.441918-1-chi.minghao@zte.com.cn --- drivers/misc/ocxl/file.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) (limited to 'drivers/misc') diff --git a/drivers/misc/ocxl/file.c b/drivers/misc/ocxl/file.c index e70525eedaae..d881f5e40ad9 100644 --- a/drivers/misc/ocxl/file.c +++ b/drivers/misc/ocxl/file.c @@ -74,7 +74,6 @@ static long afu_ioctl_attach(struct ocxl_context *ctx, { struct ocxl_ioctl_attach arg; u64 amr = 0; - int rc; pr_debug("%s for context %d\n", __func__, ctx->pasid); @@ -86,8 +85,7 @@ static long afu_ioctl_attach(struct ocxl_context *ctx, return -EINVAL; amr = arg.amr & mfspr(SPRN_UAMOR); - rc = ocxl_context_attach(ctx, amr, current->mm); - return rc; + return ocxl_context_attach(ctx, amr, current->mm); } static long afu_ioctl_get_metadata(struct ocxl_context *ctx, -- cgit v1.2.3