/* $NetBSD: pmap.h,v 1.59 2023/08/02 15:57:21 skrll Exp $ */ /*- * Copyright (c) 2014 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Matt Thomas of 3am Software Foundry. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef _AARCH64_PMAP_H_ #define _AARCH64_PMAP_H_ #ifdef __aarch64__ #ifdef _KERNEL #ifdef _KERNEL_OPT #include "opt_kasan.h" #include "opt_pmap.h" #endif #include #include #include #include #include #include #define PMAP_TLB_MAX 1 #if PMAP_TLB_MAX > 1 #define PMAP_TLB_NEED_SHOOTDOWN 1 #endif #define PMAP_TLB_FLUSH_ASID_ON_RESET true /* Maximum number of ASIDs. Some CPUs have less.*/ #define PMAP_TLB_NUM_PIDS 65536 #define PMAP_TLB_BITMAP_LENGTH PMAP_TLB_NUM_PIDS static inline tlb_asid_t pmap_md_tlb_asid_max(void) { switch (__SHIFTOUT(reg_id_aa64mmfr0_el1_read(), ID_AA64MMFR0_EL1_ASIDBITS)) { case ID_AA64MMFR0_EL1_ASIDBITS_8BIT: return (1U << 8) - 1; case ID_AA64MMFR0_EL1_ASIDBITS_16BIT: return (1U << 16) - 1; default: return 0; } } #include #include #include #define KERNEL_PID 0 /* The kernel uses ASID 0 */ /* memory attributes are configured MAIR_EL1 in locore */ #define LX_BLKPAG_ATTR_NORMAL_WB __SHIFTIN(0, LX_BLKPAG_ATTR_INDX) #define LX_BLKPAG_ATTR_NORMAL_NC __SHIFTIN(1, LX_BLKPAG_ATTR_INDX) #define LX_BLKPAG_ATTR_NORMAL_WT __SHIFTIN(2, LX_BLKPAG_ATTR_INDX) #define LX_BLKPAG_ATTR_DEVICE_MEM __SHIFTIN(3, LX_BLKPAG_ATTR_INDX) #define LX_BLKPAG_ATTR_DEVICE_MEM_NP __SHIFTIN(4, LX_BLKPAG_ATTR_INDX) #define LX_BLKPAG_ATTR_MASK LX_BLKPAG_ATTR_INDX #define lxpde_pa(pde) ((paddr_t)((pde) & LX_TBL_PA)) #define lxpde_valid(pde) (((pde) & LX_VALID) == LX_VALID) #define l0pde_pa(pde) lxpde_pa(pde) #define l0pde_index(v) (((vaddr_t)(v) & L0_ADDR_BITS) >> L0_SHIFT) #define l0pde_valid(pde) lxpde_valid(pde) /* l0pte always contains table entries */ #define l1pde_pa(pde) lxpde_pa(pde) #define l1pde_index(v) (((vaddr_t)(v) & L1_ADDR_BITS) >> L1_SHIFT) #define l1pde_valid(pde) lxpde_valid(pde) #define l1pde_is_block(pde) (((pde) & LX_TYPE) == LX_TYPE_BLK) #define l1pde_is_table(pde) (((pde) & LX_TYPE) == LX_TYPE_TBL) #define l2pde_pa(pde) lxpde_pa(pde) #define l2pde_index(v) (((vaddr_t)(v) & L2_ADDR_BITS) >> L2_SHIFT) #define l2pde_valid(pde) lxpde_valid(pde) #define l2pde_is_block(pde) (((pde) & LX_TYPE) == LX_TYPE_BLK) #define l2pde_is_table(pde) (((pde) & LX_TYPE) == LX_TYPE_TBL) #define l3pte_pa(pde) lxpde_pa(pde) #define l3pte_executable(pde,user) \ (((pde) & ((user) ? LX_BLKPAG_UXN : LX_BLKPAG_PXN)) == 0) #define l3pte_readable(pde) ((pde) & LX_BLKPAG_AF) #define l3pte_writable(pde) \ (((pde) & (LX_BLKPAG_AF | LX_BLKPAG_AP)) == (LX_BLKPAG_AF | LX_BLKPAG_AP_RW)) #define l3pte_index(v) (((vaddr_t)(v) & L3_ADDR_BITS) >> L3_SHIFT) #define l3pte_valid(pde) lxpde_valid(pde) #define l3pte_is_page(pde) (((pde) & LX_TYPE) == L3_TYPE_PAG) pd_entry_t *pmap_l0table(struct pmap *); void pmap_bootstrap(vaddr_t, vaddr_t); bool pmap_fault_fixup(struct pmap *, vaddr_t, vm_prot_t, bool user); bool pmap_extract_coherency(pmap_t, vaddr_t, paddr_t *, bool *); /* change attribute of kernel segment */ static inline pt_entry_t pmap_kvattr(pt_entry_t *ptep, vm_prot_t prot) { pt_entry_t pte = *ptep; const pt_entry_t opte = pte; pte &= ~(LX_BLKPAG_AF | LX_BLKPAG_AP); switch (prot & (VM_PROT_READ | VM_PROT_WRITE)) { case 0: break; case VM_PROT_READ: pte |= LX_BLKPAG_AF | LX_BLKPAG_AP_RO; break; case VM_PROT_WRITE: case VM_PROT_READ | VM_PROT_WRITE: pte |= LX_BLKPAG_AF | LX_BLKPAG_AP_RW; break; } if ((prot & VM_PROT_EXECUTE) == 0) { pte |= LX_BLKPAG_PXN; } else { pte |= LX_BLKPAG_AF; pte &= ~LX_BLKPAG_PXN; } *ptep = pte; return opte; } #define L1_TRUNC_BLOCK(x) ((x) & L1_FRAME) #define L1_ROUND_BLOCK(x) L1_TRUNC_BLOCK((x) + L1_SIZE - 1) #define L2_TRUNC_BLOCK(x) ((x) & L2_FRAME) #define L2_ROUND_BLOCK(x) L2_TRUNC_BLOCK((x) + L2_SIZE - 1) #define L3_TRUNC_BLOCK(x) ((x) & L3_FRAME) #define L3_ROUND_BLOCK(x) L3_TRUNC_BLOCK((x) + L3_SIZE - 1) #define DEVMAP_ALIGN(x) L3_TRUNC_BLOCK((x)) #define DEVMAP_SIZE(x) L3_ROUND_BLOCK((x)) #define DEVMAP_FLAGS PMAP_DEV /* Hooks for the pool allocator */ paddr_t vtophys(vaddr_t); /* mmap cookie and flags */ #define AARCH64_MMAP_FLAG_SHIFT (64 - PGSHIFT) #define AARCH64_MMAP_FLAG_MASK 0xf #define AARCH64_MMAP_WRITEBACK 0UL #define AARCH64_MMAP_NOCACHE 1UL #define AARCH64_MMAP_WRITECOMBINE 2UL #define AARCH64_MMAP_DEVICE 3UL #define ARM_MMAP_MASK __BITS(63, AARCH64_MMAP_FLAG_SHIFT) #define ARM_MMAP_WRITECOMBINE __SHIFTIN(AARCH64_MMAP_WRITECOMBINE, ARM_MMAP_MASK) #define ARM_MMAP_WRITEBACK __SHIFTIN(AARCH64_MMAP_WRITEBACK, ARM_MMAP_MASK) #define ARM_MMAP_NOCACHE __SHIFTIN(AARCH64_MMAP_NOCACHE, ARM_MMAP_MASK) #define ARM_MMAP_DEVICE __SHIFTIN(AARCH64_MMAP_DEVICE, ARM_MMAP_MASK) #define PMAP_PTE 0x10000000 /* kenter_pa */ #define PMAP_DEV 0x20000000 /* kenter_pa */ #define PMAP_DEV_NP 0x40000000 /* kenter_pa */ #define PMAP_DEV_MASK (PMAP_DEV | PMAP_DEV_NP) static inline u_int aarch64_mmap_flags(paddr_t mdpgno) { u_int nflag, pflag; /* * aarch64 arch has 5 memory attributes defined: * * WriteBack - write back cache * WriteThru - write through cache * NoCache - no cache * Device(nGnRE) - no Gathering, no Reordering, Early write ack * Device(nGnRnE) - no Gathering, no Reordering, no Early write ack * * but pmap has PMAP_{NOCACHE,WRITE_COMBINE,WRITE_BACK} flags. */ nflag = (mdpgno >> AARCH64_MMAP_FLAG_SHIFT) & AARCH64_MMAP_FLAG_MASK; switch (nflag) { case AARCH64_MMAP_DEVICE: pflag = PMAP_DEV; break; case AARCH64_MMAP_WRITECOMBINE: pflag = PMAP_WRITE_COMBINE; break; case AARCH64_MMAP_WRITEBACK: pflag = PMAP_WRITE_BACK; break; case AARCH64_MMAP_NOCACHE: default: pflag = PMAP_NOCACHE; break; } return pflag; } #define pmap_phys_address(pa) aarch64_ptob((pa)) #define pmap_mmap_flags(ppn) aarch64_mmap_flags((ppn)) void pmap_bootstrap(vaddr_t, vaddr_t); bool pmap_fault_fixup(struct pmap *, vaddr_t, vm_prot_t, bool user); pd_entry_t *pmapboot_pagealloc(void); void pmapboot_enter(vaddr_t, paddr_t, psize_t, psize_t, pt_entry_t, void (*pr)(const char *, ...) __printflike(1, 2)); void pmapboot_enter_range(vaddr_t, paddr_t, psize_t, pt_entry_t, void (*)(const char *, ...) __printflike(1, 2)); int pmapboot_protect(vaddr_t, vaddr_t, vm_prot_t); vsize_t pmap_map_chunk(vaddr_t, vaddr_t, paddr_t, vsize_t, vm_prot_t, u_int); #if defined(DDB) void pmap_db_pte_print(pt_entry_t, int, void (*)(const char *, ...) __printflike(1, 2)); void pmap_db_pteinfo(vaddr_t, void (*)(const char *, ...) __printflike(1, 2)); void pmap_db_ttbrdump(bool, vaddr_t, void (*)(const char *, ...) __printflike(1, 2)); #endif #define LX_BLKPAG_OS_WIRED LX_BLKPAG_OS_2 #define LX_BLKPAG_OS_BOOT LX_BLKPAG_OS_3 #define PMAP_PTE_OS2 "wired" #define PMAP_PTE_OS3 "boot" #if defined(PMAP_MI) #include #else #define PMAP_NEED_PROCWR #define PMAP_GROWKERNEL #define PMAP_STEAL_MEMORY #define __HAVE_VM_PAGE_MD #define __HAVE_PMAP_PV_TRACK 1 struct pmap { kmutex_t pm_lock; struct pool *pm_pvpool; pd_entry_t *pm_l0table; /* L0 table: 512G*512 */ paddr_t pm_l0table_pa; LIST_HEAD(, vm_page) pm_vmlist; /* for L[0123] tables */ LIST_HEAD(, pv_entry) pm_pvlist; /* all pv of this process */ struct pmap_statistics pm_stats; unsigned int pm_refcnt; unsigned int pm_idlepdp; kcpuset_t *pm_onproc; kcpuset_t *pm_active; struct pmap_asid_info pm_pai[PMAP_TLB_MAX]; bool pm_activated; }; static inline paddr_t pmap_l0pa(struct pmap *pm) { return pm->pm_l0table_pa; } /* * should be kept <=32 bytes sized to reduce memory consumption & cache misses, * but it doesn't... */ struct pv_entry { struct pv_entry *pv_next; struct pmap *pv_pmap; vaddr_t pv_va; /* for embedded entry (pp_pv) also includes flags */ void *pv_ptep; /* pointer for fast pte lookup */ LIST_ENTRY(pv_entry) pv_proc; /* belonging to the process */ }; struct pmap_page { kmutex_t pp_pvlock; struct pv_entry pp_pv; }; /* try to keep vm_page at or under 128 bytes to reduce cache misses */ struct vm_page_md { struct pmap_page mdpg_pp; }; /* for page descriptor page only */ #define mdpg_ptep_parent mdpg_pp.pp_pv.pv_ptep #define VM_MDPAGE_INIT(pg) \ do { \ PMAP_PAGE_INIT(&(pg)->mdpage.mdpg_pp); \ } while (/*CONSTCOND*/ 0) #define PMAP_PAGE_INIT(pp) \ do { \ mutex_init(&(pp)->pp_pvlock, MUTEX_NODEBUG, IPL_NONE); \ (pp)->pp_pv.pv_next = NULL; \ (pp)->pp_pv.pv_pmap = NULL; \ (pp)->pp_pv.pv_va = 0; \ (pp)->pp_pv.pv_ptep = NULL; \ } while (/*CONSTCOND*/ 0) /* saved permission bit for referenced/modified emulation */ #define LX_BLKPAG_OS_READ LX_BLKPAG_OS_0 #define LX_BLKPAG_OS_WRITE LX_BLKPAG_OS_1 #define LX_BLKPAG_OS_RWMASK (LX_BLKPAG_OS_WRITE | LX_BLKPAG_OS_READ) #define PMAP_PTE_OS0 "read" #define PMAP_PTE_OS1 "write" #define VTOPHYS_FAILED ((paddr_t)-1L) /* POOL_PADDR_INVALID */ #define POOL_VTOPHYS(va) vtophys((vaddr_t) (va)) #ifndef KASAN #define PMAP_MAP_POOLPAGE(pa) AARCH64_PA_TO_KVA(pa) #define PMAP_UNMAP_POOLPAGE(va) AARCH64_KVA_TO_PA(va) #define PMAP_DIRECT static __inline int pmap_direct_process(paddr_t pa, voff_t pgoff, size_t len, int (*process)(void *, size_t, void *), void *arg) { vaddr_t va = AARCH64_PA_TO_KVA(pa); return process((void *)(va + pgoff), len, arg); } #endif /* l3pte contains always page entries */ static inline uint64_t pte_value(pt_entry_t pte) { return pte; } static inline bool pte_valid_p(pt_entry_t pte) { return l3pte_valid(pte); } pt_entry_t *kvtopte(vaddr_t); #define pmap_update(pmap) ((void)0) #define pmap_copy(dp,sp,d,l,s) ((void)0) #define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count) #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) struct pmap * pmap_efirt(void); void pmap_activate_efirt(void); void pmap_deactivate_efirt(void); void pmap_procwr(struct proc *, vaddr_t, int); void pmap_icache_sync_range(pmap_t, vaddr_t, vaddr_t); void pmap_pv_init(void); void pmap_pv_track(paddr_t, psize_t); void pmap_pv_untrack(paddr_t, psize_t); void pmap_pv_protect(paddr_t, vm_prot_t); vsize_t pmap_kenter_range(vaddr_t, paddr_t, vsize_t, vm_prot_t, u_int); #define PMAP_MAPSIZE1 L2_SIZE /* for ddb */ void pmap_db_pmap_print(struct pmap *, void (*)(const char *, ...) __printflike(1, 2)); void pmap_db_mdpg_print(struct vm_page *, void (*)(const char *, ...) __printflike(1, 2)); #endif /* !PMAP_MI */ #endif /* _KERNEL */ #elif defined(__arm__) #include #endif /* __arm__/__aarch64__ */ #endif /* !_AARCH64_PMAP_ */