Author: jhibbits Date: Mon May 11 02:33:37 2020 New Revision: 360887 URL: https://svnweb.freebsd.org/changeset/base/360887
Log: powerpc64: Implement Radix MMU for POWER9 CPUs Summary: POWER9 supports two MMU formats: traditional hashed page tables, and Radix page tables, similar to what's presesnt on most other architectures. The PowerISA also specifies a process table -- a table of page table pointers-- which on the POWER9 is only available with the Radix MMU, so we can take advantage of it with the Radix MMU driver. Written by Matt Macy. Differential Revision: https://reviews.freebsd.org/D19516 Added: head/sys/powerpc/aim/mmu_radix.c (contents, props changed) Modified: head/sys/conf/files.powerpc head/sys/powerpc/aim/aim_machdep.c head/sys/powerpc/aim/mmu_oea.c head/sys/powerpc/aim/mmu_oea64.c head/sys/powerpc/booke/pmap.c head/sys/powerpc/include/cpufunc.h head/sys/powerpc/include/mmuvar.h head/sys/powerpc/include/param.h head/sys/powerpc/include/pmap.h head/sys/powerpc/include/proc.h head/sys/powerpc/include/pte.h head/sys/powerpc/include/spr.h head/sys/powerpc/include/sr.h head/sys/powerpc/include/vmparam.h head/sys/powerpc/powerpc/machdep.c head/sys/powerpc/powerpc/mmu_if.m head/sys/powerpc/powerpc/pmap_dispatch.c head/sys/powerpc/powerpc/trap.c head/sys/vm/vm_fault.c Modified: head/sys/conf/files.powerpc ============================================================================== --- head/sys/conf/files.powerpc Mon May 11 01:20:40 2020 (r360886) +++ head/sys/conf/files.powerpc Mon May 11 02:33:37 2020 (r360887) @@ -135,6 +135,7 @@ powerpc/aim/locore.S optional aim no-obj powerpc/aim/aim_machdep.c optional aim powerpc/aim/mmu_oea.c optional aim powerpc powerpc/aim/mmu_oea64.c optional aim +powerpc/aim/mmu_radix.c optional aim powerpc64 powerpc/aim/moea64_if.m optional aim powerpc/aim/moea64_native.c optional aim powerpc/aim/mp_cpudep.c optional aim Modified: head/sys/powerpc/aim/aim_machdep.c ============================================================================== --- head/sys/powerpc/aim/aim_machdep.c Mon May 11 01:20:40 2020 (r360886) +++ head/sys/powerpc/aim/aim_machdep.c Mon May 11 02:33:37 2020 (r360887) @@ -136,6 +136,8 @@ __FBSDID("$FreeBSD$"); struct bat battable[16]; #endif +int radix_mmu = 0; + #ifndef __powerpc64__ /* Bits for running on 64-bit systems in 32-bit mode. */ extern void *testppc64, *testppc64size; @@ -451,7 +453,14 @@ aim_cpu_init(vm_offset_t toc) * in case the platform module had a better idea of what we * should do. */ - if (cpu_features & PPC_FEATURE_64) + if (cpu_features2 & PPC_FEATURE2_ARCH_3_00) { + radix_mmu = 0; + TUNABLE_INT_FETCH("radix_mmu", &radix_mmu); + if (radix_mmu) + pmap_mmu_install(MMU_TYPE_RADIX, BUS_PROBE_GENERIC); + else + pmap_mmu_install(MMU_TYPE_G5, BUS_PROBE_GENERIC); + } else if (cpu_features & PPC_FEATURE_64) pmap_mmu_install(MMU_TYPE_G5, BUS_PROBE_GENERIC); else pmap_mmu_install(MMU_TYPE_OEA, BUS_PROBE_GENERIC); Modified: head/sys/powerpc/aim/mmu_oea.c ============================================================================== --- head/sys/powerpc/aim/mmu_oea.c Mon May 11 01:20:40 2020 (r360886) +++ head/sys/powerpc/aim/mmu_oea.c Mon May 11 02:33:37 2020 (r360887) @@ -322,6 +322,7 @@ void moea_dumpsys_map(mmu_t mmu, vm_paddr_t pa, size_t void moea_scan_init(mmu_t mmu); vm_offset_t moea_quick_enter_page(mmu_t mmu, vm_page_t m); void moea_quick_remove_page(mmu_t mmu, vm_offset_t addr); +boolean_t moea_page_is_mapped(mmu_t mmu, vm_page_t m); static int moea_map_user_ptr(mmu_t mmu, pmap_t pm, volatile const void *uaddr, void **kaddr, size_t ulen, size_t *klen); static int moea_decode_kernel_ptr(mmu_t mmu, vm_offset_t addr, @@ -364,6 +365,7 @@ static mmu_method_t moea_methods[] = { MMUMETHOD(mmu_page_set_memattr, moea_page_set_memattr), MMUMETHOD(mmu_quick_enter_page, moea_quick_enter_page), MMUMETHOD(mmu_quick_remove_page, moea_quick_remove_page), + MMUMETHOD(mmu_page_is_mapped, moea_page_is_mapped), /* Internal interfaces */ MMUMETHOD(mmu_bootstrap, moea_bootstrap), @@ -1102,6 +1104,12 @@ moea_quick_enter_page(mmu_t mmu, vm_page_t m) void moea_quick_remove_page(mmu_t mmu, vm_offset_t addr) { +} + +boolean_t +moea_page_is_mapped(mmu_t mmu, vm_page_t m) +{ + return (!LIST_EMPTY(&(m)->md.mdpg_pvoh)); } /* Modified: head/sys/powerpc/aim/mmu_oea64.c ============================================================================== --- head/sys/powerpc/aim/mmu_oea64.c Mon May 11 01:20:40 2020 (r360886) +++ head/sys/powerpc/aim/mmu_oea64.c Mon May 11 02:33:37 2020 (r360887) @@ -120,8 +120,7 @@ uintptr_t moea64_get_unique_vsid(void); * */ -#define PV_LOCK_PER_DOM (PA_LOCK_COUNT * 3) -#define PV_LOCK_COUNT (PV_LOCK_PER_DOM * MAXMEMDOM) +#define PV_LOCK_COUNT PA_LOCK_COUNT static struct mtx_padalign pv_lock[PV_LOCK_COUNT]; /* @@ -130,8 +129,7 @@ static struct mtx_padalign pv_lock[PV_LOCK_COUNT]; * index at (N << 45). */ #ifdef __powerpc64__ -#define PV_LOCK_IDX(pa) (pa_index(pa) % PV_LOCK_PER_DOM + \ - (((pa) >> 45) % MAXMEMDOM) * PV_LOCK_PER_DOM) +#define PV_LOCK_IDX(pa) ((pa_index(pa) * (((pa) >> 45) + 1)) % PV_LOCK_COUNT) #else #define PV_LOCK_IDX(pa) (pa_index(pa) % PV_LOCK_COUNT) #endif @@ -305,6 +303,7 @@ void moea64_dumpsys_map(mmu_t mmu, vm_paddr_t pa, size void moea64_scan_init(mmu_t mmu); vm_offset_t moea64_quick_enter_page(mmu_t mmu, vm_page_t m); void moea64_quick_remove_page(mmu_t mmu, vm_offset_t addr); +boolean_t moea64_page_is_mapped(mmu_t mmu, vm_page_t m); static int moea64_map_user_ptr(mmu_t mmu, pmap_t pm, volatile const void *uaddr, void **kaddr, size_t ulen, size_t *klen); static int moea64_decode_kernel_ptr(mmu_t mmu, vm_offset_t addr, @@ -353,6 +352,7 @@ static mmu_method_t moea64_methods[] = { MMUMETHOD(mmu_page_set_memattr, moea64_page_set_memattr), MMUMETHOD(mmu_quick_enter_page, moea64_quick_enter_page), MMUMETHOD(mmu_quick_remove_page, moea64_quick_remove_page), + MMUMETHOD(mmu_page_is_mapped, moea64_page_is_mapped), #ifdef __powerpc64__ MMUMETHOD(mmu_page_array_startup, moea64_page_array_startup), #endif @@ -1423,6 +1423,12 @@ moea64_quick_remove_page(mmu_t mmu, vm_offset_t addr) ("moea64_quick_remove_page: invalid address")); mtx_unlock(PCPU_PTR(aim.qmap_lock)); sched_unpin(); +} + +boolean_t +moea64_page_is_mapped(mmu_t mmu, vm_page_t m) +{ + return (!LIST_EMPTY(&(m)->md.mdpg_pvoh)); } /* Added: head/sys/powerpc/aim/mmu_radix.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/powerpc/aim/mmu_radix.c Mon May 11 02:33:37 2020 (r360887) @@ -0,0 +1,6507 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause-FreeBSD + * + * Copyright (c) 2018 Matthew Macy + * + * 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 AUTHOR ``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 AUTHOR 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. + */ + + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + + +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/systm.h> +#include <sys/epoch.h> +#include <sys/conf.h> +#include <sys/bitstring.h> +#include <sys/queue.h> +#include <sys/cpuset.h> +#include <sys/endian.h> +#include <sys/kerneldump.h> +#include <sys/ktr.h> +#include <sys/lock.h> +#include <sys/syslog.h> +#include <sys/msgbuf.h> +#include <sys/malloc.h> +#include <sys/mman.h> +#include <sys/mutex.h> +#include <sys/proc.h> +#include <sys/rwlock.h> +#include <sys/sched.h> +#include <sys/sysctl.h> +#include <sys/systm.h> +#include <sys/vmem.h> +#include <sys/vmmeter.h> +#include <sys/smp.h> + +#include <sys/kdb.h> + +#include <dev/ofw/openfirm.h> + +#include <vm/vm.h> +#include <vm/pmap.h> +#include <vm/vm_param.h> +#include <vm/vm_kern.h> +#include <vm/vm_page.h> +#include <vm/vm_map.h> +#include <vm/vm_object.h> +#include <vm/vm_extern.h> +#include <vm/vm_pageout.h> +#include <vm/vm_phys.h> +#include <vm/vm_reserv.h> +#include <vm/uma.h> + +#include <machine/_inttypes.h> +#include <machine/cpu.h> +#include <machine/platform.h> +#include <machine/frame.h> +#include <machine/md_var.h> +#include <machine/psl.h> +#include <machine/bat.h> +#include <machine/hid.h> +#include <machine/pte.h> +#include <machine/sr.h> +#include <machine/trap.h> +#include <machine/mmuvar.h> + +#ifdef INVARIANTS +#include <vm/uma_dbg.h> +#endif + +#define PPC_BITLSHIFT(bit) (sizeof(long)*NBBY - 1 - (bit)) +#define PPC_BIT(bit) (1UL << PPC_BITLSHIFT(bit)) +#define PPC_BITLSHIFT_VAL(val, bit) ((val) << PPC_BITLSHIFT(bit)) + +#include "opt_ddb.h" +#ifdef DDB +static void pmap_pte_walk(pml1_entry_t *l1, vm_offset_t va); +#endif + +#define PG_W RPTE_WIRED +#define PG_V RPTE_VALID +#define PG_MANAGED RPTE_MANAGED +#define PG_PROMOTED RPTE_PROMOTED +#define PG_M RPTE_C +#define PG_A RPTE_R +#define PG_X RPTE_EAA_X +#define PG_RW RPTE_EAA_W +#define PG_PTE_CACHE RPTE_ATTR_MASK + +#define RPTE_SHIFT 9 +#define NLS_MASK ((1UL<<5)-1) +#define RPTE_ENTRIES (1UL<<RPTE_SHIFT) +#define RPTE_MASK (RPTE_ENTRIES-1) + +#define NLB_SHIFT 0 +#define NLB_MASK (((1UL<<52)-1) << 8) + +extern int nkpt; +extern caddr_t crashdumpmap; + +#define RIC_FLUSH_TLB 0 +#define RIC_FLUSH_PWC 1 +#define RIC_FLUSH_ALL 2 + +#define POWER9_TLB_SETS_RADIX 128 /* # sets in POWER9 TLB Radix mode */ + +#define PPC_INST_TLBIE 0x7c000264 +#define PPC_INST_TLBIEL 0x7c000224 +#define PPC_INST_SLBIA 0x7c0003e4 + +#define ___PPC_RA(a) (((a) & 0x1f) << 16) +#define ___PPC_RB(b) (((b) & 0x1f) << 11) +#define ___PPC_RS(s) (((s) & 0x1f) << 21) +#define ___PPC_RT(t) ___PPC_RS(t) +#define ___PPC_R(r) (((r) & 0x1) << 16) +#define ___PPC_PRS(prs) (((prs) & 0x1) << 17) +#define ___PPC_RIC(ric) (((ric) & 0x3) << 18) + +#define PPC_SLBIA(IH) __XSTRING(.long PPC_INST_SLBIA | \ + ((IH & 0x7) << 21)) +#define PPC_TLBIE_5(rb,rs,ric,prs,r) \ + __XSTRING(.long PPC_INST_TLBIE | \ + ___PPC_RB(rb) | ___PPC_RS(rs) | \ + ___PPC_RIC(ric) | ___PPC_PRS(prs) | \ + ___PPC_R(r)) + +#define PPC_TLBIEL(rb,rs,ric,prs,r) \ + __XSTRING(.long PPC_INST_TLBIEL | \ + ___PPC_RB(rb) | ___PPC_RS(rs) | \ + ___PPC_RIC(ric) | ___PPC_PRS(prs) | \ + ___PPC_R(r)) + +#define PPC_INVALIDATE_ERAT PPC_SLBIA(7) + +static __inline void +ttusync(void) +{ + __asm __volatile("eieio; tlbsync; ptesync" ::: "memory"); +} + +#define TLBIEL_INVAL_SEL_MASK 0xc00 /* invalidation selector */ +#define TLBIEL_INVAL_PAGE 0x000 /* invalidate a single page */ +#define TLBIEL_INVAL_SET_PID 0x400 /* invalidate a set for the current PID */ +#define TLBIEL_INVAL_SET_LPID 0x800 /* invalidate a set for current LPID */ +#define TLBIEL_INVAL_SET 0xc00 /* invalidate a set for all LPIDs */ + +#define TLBIE_ACTUAL_PAGE_MASK 0xe0 +#define TLBIE_ACTUAL_PAGE_4K 0x00 +#define TLBIE_ACTUAL_PAGE_64K 0xa0 +#define TLBIE_ACTUAL_PAGE_2M 0x20 +#define TLBIE_ACTUAL_PAGE_1G 0x40 + +#define TLBIE_PRS_PARTITION_SCOPE 0x0 +#define TLBIE_PRS_PROCESS_SCOPE 0x1 + +#define TLBIE_RIC_INVALIDATE_TLB 0x0 /* Invalidate just TLB */ +#define TLBIE_RIC_INVALIDATE_PWC 0x1 /* Invalidate just PWC */ +#define TLBIE_RIC_INVALIDATE_ALL 0x2 /* Invalidate TLB, PWC, + * cached {proc, part}tab entries + */ +#define TLBIE_RIC_INVALIDATE_SEQ 0x3 /* HPT - only: + * Invalidate a range of translations + */ + +static __inline void +radix_tlbie(uint8_t ric, uint8_t prs, uint16_t is, uint32_t pid, uint32_t lpid, + vm_offset_t va, uint16_t ap) +{ + uint64_t rb, rs; + + MPASS((va & PAGE_MASK) == 0); + + rs = ((uint64_t)pid << 32) | lpid; + rb = va | is | ap; + __asm __volatile(PPC_TLBIE_5(%0, %1, %2, %3, 1) : : + "r" (rb), "r" (rs), "i" (ric), "i" (prs)); +} + +static __inline void +radix_tlbie_invlpg_user_4k(uint32_t pid, vm_offset_t va) +{ + + radix_tlbie(TLBIE_RIC_INVALIDATE_TLB, TLBIE_PRS_PROCESS_SCOPE, + TLBIEL_INVAL_PAGE, pid, 0, va, TLBIE_ACTUAL_PAGE_4K); +} + +static __inline void +radix_tlbie_invlpg_user_2m(uint32_t pid, vm_offset_t va) +{ + + radix_tlbie(TLBIE_RIC_INVALIDATE_TLB, TLBIE_PRS_PROCESS_SCOPE, + TLBIEL_INVAL_PAGE, pid, 0, va, TLBIE_ACTUAL_PAGE_2M); +} + +static __inline void +radix_tlbie_invlpwc_user(uint32_t pid) +{ + + radix_tlbie(TLBIE_RIC_INVALIDATE_PWC, TLBIE_PRS_PROCESS_SCOPE, + TLBIEL_INVAL_SET_PID, pid, 0, 0, 0); +} + +static __inline void +radix_tlbie_flush_user(uint32_t pid) +{ + + radix_tlbie(TLBIE_RIC_INVALIDATE_ALL, TLBIE_PRS_PROCESS_SCOPE, + TLBIEL_INVAL_SET_PID, pid, 0, 0, 0); +} + +static __inline void +radix_tlbie_invlpg_kernel_4k(vm_offset_t va) +{ + + radix_tlbie(TLBIE_RIC_INVALIDATE_TLB, TLBIE_PRS_PROCESS_SCOPE, + TLBIEL_INVAL_PAGE, 0, 0, va, TLBIE_ACTUAL_PAGE_4K); +} + +static __inline void +radix_tlbie_invlpg_kernel_2m(vm_offset_t va) +{ + + radix_tlbie(TLBIE_RIC_INVALIDATE_TLB, TLBIE_PRS_PROCESS_SCOPE, + TLBIEL_INVAL_PAGE, 0, 0, va, TLBIE_ACTUAL_PAGE_2M); +} + +/* 1GB pages aren't currently supported. */ +static __inline __unused void +radix_tlbie_invlpg_kernel_1g(vm_offset_t va) +{ + + radix_tlbie(TLBIE_RIC_INVALIDATE_TLB, TLBIE_PRS_PROCESS_SCOPE, + TLBIEL_INVAL_PAGE, 0, 0, va, TLBIE_ACTUAL_PAGE_1G); +} + +static __inline void +radix_tlbie_invlpwc_kernel(void) +{ + + radix_tlbie(TLBIE_RIC_INVALIDATE_PWC, TLBIE_PRS_PROCESS_SCOPE, + TLBIEL_INVAL_SET_LPID, 0, 0, 0, 0); +} + +static __inline void +radix_tlbie_flush_kernel(void) +{ + + radix_tlbie(TLBIE_RIC_INVALIDATE_ALL, TLBIE_PRS_PROCESS_SCOPE, + TLBIEL_INVAL_SET_LPID, 0, 0, 0, 0); +} + +static __inline vm_pindex_t +pmap_l3e_pindex(vm_offset_t va) +{ + return ((va & PG_FRAME) >> L3_PAGE_SIZE_SHIFT); +} + +static __inline vm_pindex_t +pmap_pml3e_index(vm_offset_t va) +{ + + return ((va >> L3_PAGE_SIZE_SHIFT) & RPTE_MASK); +} + +static __inline vm_pindex_t +pmap_pml2e_index(vm_offset_t va) +{ + return ((va >> L2_PAGE_SIZE_SHIFT) & RPTE_MASK); +} + +static __inline vm_pindex_t +pmap_pml1e_index(vm_offset_t va) +{ + return ((va & PG_FRAME) >> L1_PAGE_SIZE_SHIFT); +} + +/* Return various clipped indexes for a given VA */ +static __inline vm_pindex_t +pmap_pte_index(vm_offset_t va) +{ + + return ((va >> PAGE_SHIFT) & RPTE_MASK); +} + +/* Return a pointer to the PT slot that corresponds to a VA */ +static __inline pt_entry_t * +pmap_l3e_to_pte(pt_entry_t *l3e, vm_offset_t va) +{ + pt_entry_t *pte; + vm_paddr_t ptepa; + + ptepa = (*l3e & NLB_MASK); + pte = (pt_entry_t *)PHYS_TO_DMAP(ptepa); + return (&pte[pmap_pte_index(va)]); +} + +/* Return a pointer to the PD slot that corresponds to a VA */ +static __inline pt_entry_t * +pmap_l2e_to_l3e(pt_entry_t *l2e, vm_offset_t va) +{ + pt_entry_t *l3e; + vm_paddr_t l3pa; + + l3pa = (*l2e & NLB_MASK); + l3e = (pml3_entry_t *)PHYS_TO_DMAP(l3pa); + return (&l3e[pmap_pml3e_index(va)]); +} + +/* Return a pointer to the PD slot that corresponds to a VA */ +static __inline pt_entry_t * +pmap_l1e_to_l2e(pt_entry_t *l1e, vm_offset_t va) +{ + pt_entry_t *l2e; + vm_paddr_t l2pa; + + l2pa = (*l1e & NLB_MASK); + + l2e = (pml2_entry_t *)PHYS_TO_DMAP(l2pa); + return (&l2e[pmap_pml2e_index(va)]); +} + +static __inline pml1_entry_t * +pmap_pml1e(pmap_t pmap, vm_offset_t va) +{ + + return (&pmap->pm_pml1[pmap_pml1e_index(va)]); +} + +static pt_entry_t * +pmap_pml2e(pmap_t pmap, vm_offset_t va) +{ + pt_entry_t *l1e; + + l1e = pmap_pml1e(pmap, va); + if (l1e == NULL || (*l1e & RPTE_VALID) == 0) + return (NULL); + return (pmap_l1e_to_l2e(l1e, va)); +} + +static __inline pt_entry_t * +pmap_pml3e(pmap_t pmap, vm_offset_t va) +{ + pt_entry_t *l2e; + + l2e = pmap_pml2e(pmap, va); + if (l2e == NULL || (*l2e & RPTE_VALID) == 0) + return (NULL); + return (pmap_l2e_to_l3e(l2e, va)); +} + +static __inline pt_entry_t * +pmap_pte(pmap_t pmap, vm_offset_t va) +{ + pt_entry_t *l3e; + + l3e = pmap_pml3e(pmap, va); + if (l3e == NULL || (*l3e & RPTE_VALID) == 0) + return (NULL); + return (pmap_l3e_to_pte(l3e, va)); +} + +int nkpt = 64; +SYSCTL_INT(_machdep, OID_AUTO, nkpt, CTLFLAG_RD, &nkpt, 0, + "Number of kernel page table pages allocated on bootup"); + +vm_paddr_t dmaplimit; + +SYSCTL_NODE(_vm, OID_AUTO, pmap, CTLFLAG_RD, 0, "VM/pmap parameters"); + +static int pg_ps_enabled = 1; +SYSCTL_INT(_vm_pmap, OID_AUTO, pg_ps_enabled, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, + &pg_ps_enabled, 0, "Are large page mappings enabled?"); +#ifdef INVARIANTS +#define VERBOSE_PMAP 0 +#define VERBOSE_PROTECT 0 +static int pmap_logging; +SYSCTL_INT(_vm_pmap, OID_AUTO, pmap_logging, CTLFLAG_RWTUN, + &pmap_logging, 0, "verbose debug logging"); +#endif + +static u_int64_t KPTphys; /* phys addr of kernel level 1 */ + +//static vm_paddr_t KERNend; /* phys addr of end of bootstrap data */ + +static vm_offset_t qframe = 0; +static struct mtx qframe_mtx; +static epoch_t pmap_epoch; + +void mmu_radix_activate(mmu_t mmu, struct thread *); +void mmu_radix_advise(mmu_t mmu, pmap_t, vm_offset_t, vm_offset_t, int); +void mmu_radix_align_superpage(mmu_t mmu, vm_object_t, vm_ooffset_t, vm_offset_t *, + vm_size_t); +void mmu_radix_clear_modify(mmu_t, vm_page_t); +void mmu_radix_copy(mmu_t, pmap_t, pmap_t, vm_offset_t, vm_size_t, vm_offset_t); +int mmu_radix_map_user_ptr(mmu_t mmu, pmap_t pm, + volatile const void *uaddr, void **kaddr, size_t ulen, size_t *klen); +int mmu_radix_decode_kernel_ptr(mmu_t, vm_offset_t, int *, vm_offset_t *); +int mmu_radix_enter(mmu_t, pmap_t, vm_offset_t, vm_page_t, vm_prot_t, u_int, int8_t); +void mmu_radix_enter_object(mmu_t, pmap_t, vm_offset_t, vm_offset_t, vm_page_t, + vm_prot_t); +void mmu_radix_enter_quick(mmu_t, pmap_t, vm_offset_t, vm_page_t, vm_prot_t); +vm_paddr_t mmu_radix_extract(mmu_t, pmap_t pmap, vm_offset_t va); +vm_page_t mmu_radix_extract_and_hold(mmu_t, pmap_t, vm_offset_t, vm_prot_t); +void mmu_radix_kenter(mmu_t, vm_offset_t, vm_paddr_t); +vm_paddr_t mmu_radix_kextract(mmu_t, vm_offset_t); +void mmu_radix_kremove(mmu_t, vm_offset_t); +boolean_t mmu_radix_is_modified(mmu_t, vm_page_t); +boolean_t mmu_radix_is_prefaultable(mmu_t, pmap_t, vm_offset_t); +boolean_t mmu_radix_is_referenced(mmu_t, vm_page_t); +void mmu_radix_object_init_pt(mmu_t, pmap_t, vm_offset_t, vm_object_t, + vm_pindex_t, vm_size_t); +boolean_t mmu_radix_page_exists_quick(mmu_t, pmap_t, vm_page_t); +void mmu_radix_page_init(mmu_t, vm_page_t); +boolean_t mmu_radix_page_is_mapped(mmu_t, vm_page_t m); +void mmu_radix_page_set_memattr(mmu_t, vm_page_t, vm_memattr_t); +int mmu_radix_page_wired_mappings(mmu_t, vm_page_t); +void mmu_radix_pinit(mmu_t, pmap_t); +void mmu_radix_protect(mmu_t, pmap_t, vm_offset_t, vm_offset_t, vm_prot_t); +boolean_t mmu_radix_ps_enabled(mmu_t, pmap_t); +void mmu_radix_qenter(mmu_t, vm_offset_t, vm_page_t *, int); +void mmu_radix_qremove(mmu_t, vm_offset_t, int); +vm_offset_t mmu_radix_quick_enter_page(mmu_t, vm_page_t); +void mmu_radix_quick_remove_page(mmu_t, vm_offset_t); +boolean_t mmu_radix_ts_referenced(mmu_t, vm_page_t); +void mmu_radix_release(mmu_t, pmap_t); +void mmu_radix_remove(mmu_t, pmap_t, vm_offset_t, vm_offset_t); +void mmu_radix_remove_all(mmu_t, vm_page_t); +void mmu_radix_remove_pages(mmu_t, pmap_t); +void mmu_radix_remove_write(mmu_t, vm_page_t); +void mmu_radix_unwire(mmu_t, pmap_t, vm_offset_t, vm_offset_t); +void mmu_radix_zero_page(mmu_t, vm_page_t); +void mmu_radix_zero_page_area(mmu_t, vm_page_t, int, int); +int mmu_radix_change_attr(mmu_t, vm_offset_t, vm_size_t, vm_memattr_t); +void mmu_radix_page_array_startup(mmu_t mmu, long pages); + +#include "mmu_oea64.h" +#include "mmu_if.h" +#include "moea64_if.h" + +/* + * Kernel MMU interface + */ + +static void mmu_radix_bootstrap(mmu_t mmup, + vm_offset_t kernelstart, vm_offset_t kernelend); + +static void mmu_radix_copy_page(mmu_t, vm_page_t, vm_page_t); +static void mmu_radix_copy_pages(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset, + vm_page_t *mb, vm_offset_t b_offset, int xfersize); +static void mmu_radix_growkernel(mmu_t, vm_offset_t); +static void mmu_radix_init(mmu_t); +static int mmu_radix_mincore(mmu_t, pmap_t, vm_offset_t, vm_paddr_t *); +static vm_offset_t mmu_radix_map(mmu_t, vm_offset_t *, vm_paddr_t, vm_paddr_t, int); +static void mmu_radix_pinit0(mmu_t, pmap_t); + +static void *mmu_radix_mapdev(mmu_t, vm_paddr_t, vm_size_t); +static void *mmu_radix_mapdev_attr(mmu_t, vm_paddr_t, vm_size_t, vm_memattr_t); +static void mmu_radix_unmapdev(mmu_t, vm_offset_t, vm_size_t); +static void mmu_radix_kenter_attr(mmu_t, vm_offset_t, vm_paddr_t, vm_memattr_t ma); +static boolean_t mmu_radix_dev_direct_mapped(mmu_t, vm_paddr_t, vm_size_t); +static void mmu_radix_dumpsys_map(mmu_t mmu, vm_paddr_t pa, size_t sz, + void **va); +static void mmu_radix_scan_init(mmu_t mmu); +static void mmu_radix_cpu_bootstrap(mmu_t, int ap); + +static mmu_method_t mmu_radix_methods[] = { + MMUMETHOD(mmu_bootstrap, mmu_radix_bootstrap), + MMUMETHOD(mmu_copy_page, mmu_radix_copy_page), + MMUMETHOD(mmu_copy_pages, mmu_radix_copy_pages), + MMUMETHOD(mmu_cpu_bootstrap, mmu_radix_cpu_bootstrap), + MMUMETHOD(mmu_growkernel, mmu_radix_growkernel), + MMUMETHOD(mmu_init, mmu_radix_init), + MMUMETHOD(mmu_map, mmu_radix_map), + MMUMETHOD(mmu_mincore, mmu_radix_mincore), + MMUMETHOD(mmu_pinit, mmu_radix_pinit), + MMUMETHOD(mmu_pinit0, mmu_radix_pinit0), + + MMUMETHOD(mmu_mapdev, mmu_radix_mapdev), + MMUMETHOD(mmu_mapdev_attr, mmu_radix_mapdev_attr), + MMUMETHOD(mmu_unmapdev, mmu_radix_unmapdev), + MMUMETHOD(mmu_kenter_attr, mmu_radix_kenter_attr), + MMUMETHOD(mmu_dev_direct_mapped,mmu_radix_dev_direct_mapped), + MMUMETHOD(mmu_scan_init, mmu_radix_scan_init), + MMUMETHOD(mmu_dumpsys_map, mmu_radix_dumpsys_map), + MMUMETHOD(mmu_page_is_mapped, mmu_radix_page_is_mapped), + MMUMETHOD(mmu_ps_enabled, mmu_radix_ps_enabled), + MMUMETHOD(mmu_object_init_pt, mmu_radix_object_init_pt), + MMUMETHOD(mmu_protect, mmu_radix_protect), + /* pmap dispatcher interface */ + MMUMETHOD(mmu_clear_modify, mmu_radix_clear_modify), + MMUMETHOD(mmu_copy, mmu_radix_copy), + MMUMETHOD(mmu_enter, mmu_radix_enter), + MMUMETHOD(mmu_enter_object, mmu_radix_enter_object), + MMUMETHOD(mmu_enter_quick, mmu_radix_enter_quick), + MMUMETHOD(mmu_extract, mmu_radix_extract), + MMUMETHOD(mmu_extract_and_hold, mmu_radix_extract_and_hold), + MMUMETHOD(mmu_is_modified, mmu_radix_is_modified), + MMUMETHOD(mmu_is_prefaultable, mmu_radix_is_prefaultable), + MMUMETHOD(mmu_is_referenced, mmu_radix_is_referenced), + MMUMETHOD(mmu_ts_referenced, mmu_radix_ts_referenced), + MMUMETHOD(mmu_page_exists_quick,mmu_radix_page_exists_quick), + MMUMETHOD(mmu_page_init, mmu_radix_page_init), + MMUMETHOD(mmu_page_wired_mappings, mmu_radix_page_wired_mappings), + MMUMETHOD(mmu_qenter, mmu_radix_qenter), + MMUMETHOD(mmu_qremove, mmu_radix_qremove), + MMUMETHOD(mmu_release, mmu_radix_release), + MMUMETHOD(mmu_remove, mmu_radix_remove), + MMUMETHOD(mmu_remove_all, mmu_radix_remove_all), + MMUMETHOD(mmu_remove_write, mmu_radix_remove_write), + MMUMETHOD(mmu_unwire, mmu_radix_unwire), + MMUMETHOD(mmu_zero_page, mmu_radix_zero_page), + MMUMETHOD(mmu_zero_page_area, mmu_radix_zero_page_area), + MMUMETHOD(mmu_activate, mmu_radix_activate), + MMUMETHOD(mmu_quick_enter_page, mmu_radix_quick_enter_page), + MMUMETHOD(mmu_quick_remove_page, mmu_radix_quick_remove_page), + MMUMETHOD(mmu_page_set_memattr, mmu_radix_page_set_memattr), + MMUMETHOD(mmu_page_array_startup, mmu_radix_page_array_startup), + + /* Internal interfaces */ + MMUMETHOD(mmu_kenter, mmu_radix_kenter), + MMUMETHOD(mmu_kextract, mmu_radix_kextract), + MMUMETHOD(mmu_kremove, mmu_radix_kremove), + MMUMETHOD(mmu_change_attr, mmu_radix_change_attr), + MMUMETHOD(mmu_map_user_ptr, mmu_radix_map_user_ptr), + MMUMETHOD(mmu_decode_kernel_ptr, mmu_radix_decode_kernel_ptr), + { 0, 0 } +}; + +MMU_DEF(mmu_radix, MMU_TYPE_RADIX, mmu_radix_methods, 0); + +#define METHODVOID(m) mmu_radix_ ## m(mmu_t mmup) + +static boolean_t pmap_demote_l3e_locked(pmap_t pmap, pml3_entry_t *l3e, vm_offset_t va, + struct rwlock **lockp); +static boolean_t pmap_demote_l3e(pmap_t pmap, pml3_entry_t *pde, vm_offset_t va); +static int pmap_unuse_pt(pmap_t, vm_offset_t, pml3_entry_t, struct spglist *); +static int pmap_remove_l3e(pmap_t pmap, pml3_entry_t *pdq, vm_offset_t sva, + struct spglist *free, struct rwlock **lockp); +static int pmap_remove_pte(pmap_t pmap, pt_entry_t *ptq, vm_offset_t sva, + pml3_entry_t ptepde, struct spglist *free, struct rwlock **lockp); +static vm_page_t pmap_remove_pt_page(pmap_t pmap, vm_offset_t va); +static bool pmap_remove_page(pmap_t pmap, vm_offset_t va, pml3_entry_t *pde, + struct spglist *free); +static bool pmap_remove_ptes(pmap_t pmap, vm_offset_t sva, vm_offset_t eva, + pml3_entry_t *l3e, struct spglist *free, struct rwlock **lockp); + +static bool pmap_pv_insert_l3e(pmap_t pmap, vm_offset_t va, pml3_entry_t l3e, + u_int flags, struct rwlock **lockp); +#if VM_NRESERVLEVEL > 0 +static void pmap_pv_promote_l3e(pmap_t pmap, vm_offset_t va, vm_paddr_t pa, + struct rwlock **lockp); +#endif +static void pmap_pvh_free(struct md_page *pvh, pmap_t pmap, vm_offset_t va); +static int pmap_insert_pt_page(pmap_t pmap, vm_page_t mpte); +static vm_page_t mmu_radix_enter_quick_locked(pmap_t pmap, vm_offset_t va, vm_page_t m, + vm_prot_t prot, vm_page_t mpte, struct rwlock **lockp, bool *invalidate); + +static bool pmap_enter_2mpage(pmap_t pmap, vm_offset_t va, vm_page_t m, + vm_prot_t prot, struct rwlock **lockp); +static int pmap_enter_l3e(pmap_t pmap, vm_offset_t va, pml3_entry_t newpde, + u_int flags, vm_page_t m, struct rwlock **lockp); + +static vm_page_t reclaim_pv_chunk(pmap_t locked_pmap, struct rwlock **lockp); +static void free_pv_chunk(struct pv_chunk *pc); +static vm_page_t _pmap_allocpte(pmap_t pmap, vm_pindex_t ptepindex, struct rwlock **lockp); +static vm_page_t pmap_allocl3e(pmap_t pmap, vm_offset_t va, + struct rwlock **lockp); +static vm_page_t pmap_allocpte(pmap_t pmap, vm_offset_t va, + struct rwlock **lockp); +static void _pmap_unwire_ptp(pmap_t pmap, vm_offset_t va, vm_page_t m, + struct spglist *free); +static boolean_t pmap_unwire_ptp(pmap_t pmap, vm_offset_t va, vm_page_t m, struct spglist *free); + +static void pmap_invalidate_page(pmap_t pmap, vm_offset_t start); +static void pmap_invalidate_all(pmap_t pmap); +static int pmap_change_attr_locked(vm_offset_t va, vm_size_t size, int mode, bool flush); + +/* + * Internal flags for pmap_enter()'s helper functions. + */ +#define PMAP_ENTER_NORECLAIM 0x1000000 /* Don't reclaim PV entries. */ +#define PMAP_ENTER_NOREPLACE 0x2000000 /* Don't replace mappings. */ + +#define UNIMPLEMENTED() panic("%s not implemented", __func__) +#define UNTESTED() panic("%s not yet tested", __func__) + + + +/* Number of supported PID bits */ +static unsigned int isa3_pid_bits; + +/* PID to start allocating from */ +static unsigned int isa3_base_pid; + +#define PROCTAB_SIZE_SHIFT (isa3_pid_bits + 4) +#define PROCTAB_ENTRIES (1ul << isa3_pid_bits) + + +/* + * Map of physical memory regions. + */ +static struct mem_region *regions, *pregions; +static struct numa_mem_region *numa_pregions; +static u_int phys_avail_count; +static int regions_sz, pregions_sz, numa_pregions_sz; +static struct pate *isa3_parttab; +static struct prte *isa3_proctab; +static vmem_t *asid_arena; + +extern void bs_remap_earlyboot(void); + +#define RADIX_PGD_SIZE_SHIFT 16 +#define RADIX_PGD_SIZE (1UL << RADIX_PGD_SIZE_SHIFT) + +#define RADIX_PGD_INDEX_SHIFT (RADIX_PGD_SIZE_SHIFT-3) +#define NL2EPG (PAGE_SIZE/sizeof(pml2_entry_t)) +#define NL3EPG (PAGE_SIZE/sizeof(pml3_entry_t)) + +#define NUPML1E (RADIX_PGD_SIZE/sizeof(uint64_t)) /* number of userland PML1 pages */ +#define NUPDPE (NUPML1E * NL2EPG)/* number of userland PDP pages */ +#define NUPDE (NUPDPE * NL3EPG) /* number of userland PD entries */ + +/* POWER9 only permits a 64k partition table size. */ +#define PARTTAB_SIZE_SHIFT 16 +#define PARTTAB_SIZE (1UL << PARTTAB_SIZE_SHIFT) + +#define PARTTAB_HR (1UL << 63) /* host uses radix */ +#define PARTTAB_GR (1UL << 63) /* guest uses radix must match host */ + +/* TLB flush actions. Used as argument to tlbiel_all() */ +enum { + TLB_INVAL_SCOPE_LPID = 0, /* invalidate TLBs for current LPID */ + TLB_INVAL_SCOPE_GLOBAL = 1, /* invalidate all TLBs */ +}; + +#define NPV_LIST_LOCKS MAXCPU +static int pmap_initialized; +static vm_paddr_t proctab0pa; +static vm_paddr_t parttab_phys; +CTASSERT(sizeof(struct pv_chunk) == PAGE_SIZE); + +/* + * Data for the pv entry allocation mechanism. + * Updates to pv_invl_gen are protected by the pv_list_locks[] + * elements, but reads are not. + */ +static TAILQ_HEAD(pch, pv_chunk) pv_chunks = TAILQ_HEAD_INITIALIZER(pv_chunks); +static struct mtx __exclusive_cache_line pv_chunks_mutex; +static struct rwlock __exclusive_cache_line pv_list_locks[NPV_LIST_LOCKS]; +static struct md_page *pv_table; +static struct md_page pv_dummy; + +#ifdef PV_STATS +#define PV_STAT(x) do { x ; } while (0) +#else +#define PV_STAT(x) do { } while (0) +#endif + +#define pa_radix_index(pa) ((pa) >> L3_PAGE_SIZE_SHIFT) +#define pa_to_pvh(pa) (&pv_table[pa_radix_index(pa)]) + +#define PHYS_TO_PV_LIST_LOCK(pa) \ + (&pv_list_locks[pa_radix_index(pa) % NPV_LIST_LOCKS]) + +#define CHANGE_PV_LIST_LOCK_TO_PHYS(lockp, pa) do { \ + struct rwlock **_lockp = (lockp); \ + struct rwlock *_new_lock; \ + \ + _new_lock = PHYS_TO_PV_LIST_LOCK(pa); \ + if (_new_lock != *_lockp) { \ + if (*_lockp != NULL) \ + rw_wunlock(*_lockp); \ + *_lockp = _new_lock; \ + rw_wlock(*_lockp); \ + } \ +} while (0) + +#define CHANGE_PV_LIST_LOCK_TO_VM_PAGE(lockp, m) \ + CHANGE_PV_LIST_LOCK_TO_PHYS(lockp, VM_PAGE_TO_PHYS(m)) + +#define RELEASE_PV_LIST_LOCK(lockp) do { \ + struct rwlock **_lockp = (lockp); \ + \ + if (*_lockp != NULL) { \ + rw_wunlock(*_lockp); \ + *_lockp = NULL; \ + } \ +} while (0) + +#define VM_PAGE_TO_PV_LIST_LOCK(m) \ + PHYS_TO_PV_LIST_LOCK(VM_PAGE_TO_PHYS(m)) + +/* + * We support 52 bits, hence: + * bits 52 - 31 = 21, 0b10101 + * RTS encoding details + * bits 0 - 3 of rts -> bits 6 - 8 unsigned long + * bits 4 - 5 of rts -> bits 62 - 63 of unsigned long + */ +#define RTS_SIZE ((0x2UL << 61) | (0x5UL << 5)) + + +static int powernv_enabled = 1; + +static inline void +tlbiel_radix_set_isa300(uint32_t set, uint32_t is, + uint32_t pid, uint32_t ric, uint32_t prs) +{ + uint64_t rb; + uint64_t rs; + + rb = PPC_BITLSHIFT_VAL(set, 51) | PPC_BITLSHIFT_VAL(is, 53); + rs = PPC_BITLSHIFT_VAL((uint64_t)pid, 31); + + __asm __volatile(PPC_TLBIEL(%0, %1, %2, %3, 1) + : : "r"(rb), "r"(rs), "i"(ric), "i"(prs) + : "memory"); +} + +static void +tlbiel_flush_isa3(uint32_t num_sets, uint32_t is) +{ + uint32_t set; + + __asm __volatile("ptesync": : :"memory"); + + /* + * Flush the first set of the TLB, and the entire Page Walk Cache + * and partition table entries. Then flush the remaining sets of the + * TLB. + */ + tlbiel_radix_set_isa300(0, is, 0, RIC_FLUSH_ALL, 0); + for (set = 1; set < num_sets; set++) + tlbiel_radix_set_isa300(set, is, 0, RIC_FLUSH_TLB, 0); + + /* Do the same for process scoped entries. */ + tlbiel_radix_set_isa300(0, is, 0, RIC_FLUSH_ALL, 1); + for (set = 1; set < num_sets; set++) + tlbiel_radix_set_isa300(set, is, 0, RIC_FLUSH_TLB, 1); + + __asm __volatile("ptesync": : :"memory"); +} + +static void +mmu_radix_tlbiel_flush(int scope) +{ + int is; + + MPASS(scope == TLB_INVAL_SCOPE_LPID || + scope == TLB_INVAL_SCOPE_GLOBAL); + is = scope + 2; + + tlbiel_flush_isa3(POWER9_TLB_SETS_RADIX, is); + __asm __volatile(PPC_INVALIDATE_ERAT "; isync" : : :"memory"); +} + +static void +mmu_radix_init_amor(void) +{ + /* + * In HV mode, we init AMOR (Authority Mask Override Register) so that + * the hypervisor and guest can setup IAMR (Instruction Authority Mask + * Register), enable key 0 and set it to 1. + * + * AMOR = 0b1100 .... 0000 (Mask for key 0 is 11) + */ + mtspr(SPR_AMOR, (3ul << 62)); +} + +static void +mmu_radix_init_iamr(void) +{ + /* + * Radix always uses key0 of the IAMR to determine if an access is + * allowed. We set bit 0 (IBM bit 1) of key0, to prevent instruction + * fetch. + */ + mtspr(SPR_IAMR, (1ul << 62)); +} + +static void +mmu_radix_pid_set(pmap_t pmap) +{ + + mtspr(SPR_PID, pmap->pm_pid); + isync(); +} + +/* Quick sort callout for comparing physical addresses. */ +static int +pa_cmp(const void *a, const void *b) +{ + const vm_paddr_t *pa = a, *pb = b; + + if (*pa < *pb) + return (-1); + else if (*pa > *pb) + return (1); + else + return (0); +} + +#define pte_load_store(ptep, pte) atomic_swap_long(ptep, pte) +#define pte_load_clear(ptep) atomic_swap_long(ptep, 0) +#define pte_store(ptep, pte) do { \ + MPASS((pte) & (RPTE_EAA_R | RPTE_EAA_W | RPTE_EAA_X)); \ + *(u_long *)(ptep) = (u_long)((pte) | PG_V | RPTE_LEAF); \ +} while (0) +/* + * NB: should only be used for adding directories - not for direct mappings + */ +#define pde_store(ptep, pa) do { \ + *(u_long *)(ptep) = (u_long)(pa|RPTE_VALID|RPTE_SHIFT); \ +} while (0) + +#define pte_clear(ptep) do { \ + *(u_long *)(ptep) = (u_long)(0); \ +} while (0) + +#define PMAP_PDE_SUPERPAGE (1 << 8) /* supports 2MB superpages */ + +/* + * Promotion to a 2MB (PDE) page mapping requires that the corresponding 4KB + * (PTE) page mappings have identical settings for the following fields: + */ +#define PG_PTE_PROMOTE (PG_X | PG_MANAGED | PG_W | PG_PTE_CACHE | \ + PG_M | PG_A | RPTE_EAA_MASK | PG_V) + + +static void +pmap_epoch_init(void *arg __unused) +{ + pmap_epoch = epoch_alloc("pmap", EPOCH_PREEMPT | EPOCH_LOCKED); +} +SYSINIT(epoch, SI_SUB_EPOCH + 1, SI_ORDER_ANY, pmap_epoch_init, NULL); + +static bool +pmap_not_in_di(void) +{ + + return (curthread->td_md.md_invl_gen.gen == 0); +} + +#define PMAP_ASSERT_NOT_IN_DI() \ + KASSERT(pmap_not_in_di(), ("DI already started")) + +static void +pmap_delayed_invl_started(epoch_tracker_t et) +{ + epoch_enter_preempt(pmap_epoch, et); + curthread->td_md.md_invl_gen.gen = 1; +} + +static void +pmap_delayed_invl_finished(epoch_tracker_t et) +{ *** DIFF OUTPUT TRUNCATED AT 1000 LINES *** _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
