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libkvm: Remove mips support

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libkvm references files in sys/mips, so remove it ahead of removing
sys/mips.

Sponsored by:		Netflix
This commit is contained in:
Warner Losh 2021-12-30 16:45:17 -07:00
parent 818952c638
commit fe532f1a50
3 changed files with 0 additions and 490 deletions
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1
lib/libkvm/Makefile
View File

@ -14,7 +14,6 @@ SRCS= kvm.c kvm_cptime.c kvm_getloadavg.c \
kvm_amd64.c kvm_minidump_amd64.c \
kvm_arm.c kvm_minidump_arm.c \
kvm_i386.c kvm_minidump_i386.c \
kvm_minidump_mips.c \
kvm_powerpc.c kvm_powerpc64.c \
kvm_minidump_riscv.c \
kvm_minidump_powerpc64.c kvm_minidump_powerpc64_hpt.c

372
lib/libkvm/kvm_minidump_mips.c
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@ -1,372 +0,0 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2010 Oleksandr Tymoshenko
* Copyright (c) 2008 Semihalf, Grzegorz Bernacki
* Copyright (c) 2006 Peter Wemm
*
* 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 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 AUTHOR 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.
*
* From: FreeBSD: src/lib/libkvm/kvm_minidump_arm.c r214223
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* MIPS machine dependent routines for kvm and minidumps.
*/
#include <sys/param.h>
#include <vm/vm.h>
#include <kvm.h>
#include <limits.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "../../sys/mips/include/cca.h"
#define _KVM_MINIDUMP
#include "../../sys/mips/include/cpuregs.h"
#include "../../sys/mips/include/minidump.h"
#include "kvm_private.h"
#include "kvm_mips.h"
#define mips_round_page(x) roundup2((kvaddr_t)(x), MIPS_PAGE_SIZE)
struct vmstate {
struct minidumphdr hdr;
int pte_size;
};
static int
_mips_minidump_probe(kvm_t *kd)
{
if (kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS32 &&
kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS64)
return (0);
if (kd->nlehdr.e_machine != EM_MIPS)
return (0);
return (_kvm_is_minidump(kd));
}
static void
_mips_minidump_freevtop(kvm_t *kd)
{
struct vmstate *vm = kd->vmst;
free(vm);
kd->vmst = NULL;
}
static int
_mips_minidump_initvtop(kvm_t *kd)
{
struct vmstate *vmst;
off_t off, dump_avail_off, sparse_off;
vmst = _kvm_malloc(kd, sizeof(*vmst));
if (vmst == NULL) {
_kvm_err(kd, kd->program, "cannot allocate vm");
return (-1);
}
kd->vmst = vmst;
if (kd->nlehdr.e_ident[EI_CLASS] == ELFCLASS64 ||
kd->nlehdr.e_flags & EF_MIPS_ABI2)
vmst->pte_size = 64;
else
vmst->pte_size = 32;
if (pread(kd->pmfd, &vmst->hdr,
sizeof(vmst->hdr), 0) != sizeof(vmst->hdr)) {
_kvm_err(kd, kd->program, "cannot read dump header");
return (-1);
}
if (strncmp(MINIDUMP_MAGIC, vmst->hdr.magic,
sizeof(vmst->hdr.magic)) != 0) {
_kvm_err(kd, kd->program, "not a minidump for this platform");
return (-1);
}
vmst->hdr.version = _kvm32toh(kd, vmst->hdr.version);
if (vmst->hdr.version != MINIDUMP_VERSION && vmst->hdr.version != 1) {
_kvm_err(kd, kd->program, "wrong minidump version. "
"Expected %d got %d", MINIDUMP_VERSION, vmst->hdr.version);
return (-1);
}
vmst->hdr.msgbufsize = _kvm32toh(kd, vmst->hdr.msgbufsize);
vmst->hdr.bitmapsize = _kvm32toh(kd, vmst->hdr.bitmapsize);
vmst->hdr.ptesize = _kvm32toh(kd, vmst->hdr.ptesize);
vmst->hdr.kernbase = _kvm64toh(kd, vmst->hdr.kernbase);
vmst->hdr.dmapbase = _kvm64toh(kd, vmst->hdr.dmapbase);
vmst->hdr.dmapend = _kvm64toh(kd, vmst->hdr.dmapend);
vmst->hdr.dumpavailsize = vmst->hdr.version == MINIDUMP_VERSION ?
_kvm32toh(kd, vmst->hdr.dumpavailsize) : 0;
/* Skip header and msgbuf */
dump_avail_off = MIPS_PAGE_SIZE + mips_round_page(vmst->hdr.msgbufsize);
/* Skip dump_avail */
off = dump_avail_off + mips_round_page(vmst->hdr.dumpavailsize);
sparse_off = off + mips_round_page(vmst->hdr.bitmapsize) +
mips_round_page(vmst->hdr.ptesize);
if (_kvm_pt_init(kd, vmst->hdr.dumpavailsize, dump_avail_off,
vmst->hdr.bitmapsize, off, sparse_off, MIPS_PAGE_SIZE) == -1) {
return (-1);
}
off += mips_round_page(vmst->hdr.bitmapsize);
if (_kvm_pmap_init(kd, vmst->hdr.ptesize, off) == -1) {
return (-1);
}
off += mips_round_page(vmst->hdr.ptesize);
return (0);
}
static int
_mips_minidump_kvatop(kvm_t *kd, kvaddr_t va, off_t *pa)
{
struct vmstate *vm;
mips_physaddr_t offset, a;
kvaddr_t pteindex;
u_long valid;
off_t ofs;
mips32_pte_t pte32;
mips64_pte_t pte64;
if (ISALIVE(kd)) {
_kvm_err(kd, 0, "_mips_minidump_kvatop called in live kernel!");
return (0);
}
offset = va & MIPS_PAGE_MASK;
/* Operate with page-aligned address */
va &= ~MIPS_PAGE_MASK;
vm = kd->vmst;
if (kd->nlehdr.e_ident[EI_CLASS] == ELFCLASS64) {
if (va >= MIPS_XKPHYS_START && va < MIPS_XKPHYS_END) {
a = va & MIPS_XKPHYS_PHYS_MASK;
goto found;
}
if (va >= MIPS64_KSEG0_START && va < MIPS64_KSEG0_END) {
a = va & MIPS_KSEG0_PHYS_MASK;
goto found;
}
if (va >= MIPS64_KSEG1_START && va < MIPS64_KSEG1_END) {
a = va & MIPS_KSEG0_PHYS_MASK;
goto found;
}
} else {
if (va >= MIPS32_KSEG0_START && va < MIPS32_KSEG0_END) {
a = va & MIPS_KSEG0_PHYS_MASK;
goto found;
}
if (va >= MIPS32_KSEG1_START && va < MIPS32_KSEG1_END) {
a = va & MIPS_KSEG0_PHYS_MASK;
goto found;
}
}
if (va >= vm->hdr.kernbase) {
pteindex = (va - vm->hdr.kernbase) >> MIPS_PAGE_SHIFT;
if (vm->pte_size == 64) {
valid = pteindex < vm->hdr.ptesize / sizeof(pte64);
if (pteindex >= vm->hdr.ptesize / sizeof(pte64))
goto invalid;
pte64 = _mips64_pte_get(kd, pteindex);
valid = pte64 & MIPS_PTE_V;
if (valid)
a = MIPS64_PTE_TO_PA(pte64);
} else {
if (pteindex >= vm->hdr.ptesize / sizeof(pte32))
goto invalid;
pte32 = _mips32_pte_get(kd, pteindex);
valid = pte32 & MIPS_PTE_V;
if (valid)
a = MIPS32_PTE_TO_PA(pte32);
}
if (!valid) {
_kvm_err(kd, kd->program, "_mips_minidump_kvatop: pte "
"not valid");
goto invalid;
}
} else {
_kvm_err(kd, kd->program, "_mips_minidump_kvatop: virtual "
"address 0x%jx not minidumped", (uintmax_t)va);
return (0);
}
found:
ofs = _kvm_pt_find(kd, a, MIPS_PAGE_SIZE);
if (ofs == -1) {
_kvm_err(kd, kd->program, "_mips_minidump_kvatop: physical "
"address 0x%jx not in minidump", (uintmax_t)a);
goto invalid;
}
*pa = ofs + offset;
return (MIPS_PAGE_SIZE - offset);
invalid:
_kvm_err(kd, 0, "invalid address (0x%jx)", (uintmax_t)va);
return (0);
}
static int
#ifdef __mips__
_mips_native(kvm_t *kd)
#else
_mips_native(kvm_t *kd __unused)
#endif
{
#ifdef __mips__
#ifdef __mips_n64
if (kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS64)
return (0);
#else
if (kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS32)
return (0);
#ifdef __mips_n32
if (!(kd->nlehdr.e_flags & EF_MIPS_ABI2))
return (0);
#else
if (kd->nlehdr.e_flags & EF_MIPS_ABI2)
return (0);
#endif
#endif
#if _BYTE_ORDER == _LITTLE_ENDIAN
return (kd->nlehdr.e_ident[EI_DATA] == ELFDATA2LSB);
#else
return (kd->nlehdr.e_ident[EI_DATA] == ELFDATA2MSB);
#endif
#else
return (0);
#endif
}
struct mips_iter {
kvm_t *kd;
u_long nptes;
u_long pteindex;
};
static void
_mips_iterator_init(struct mips_iter *it, kvm_t *kd)
{
struct vmstate *vm = kd->vmst;
it->kd = kd;
it->pteindex = 0;
if (vm->pte_size == 64)
it->nptes = vm->hdr.ptesize / sizeof(mips64_pte_t);
else
it->nptes = vm->hdr.ptesize / sizeof(mips32_pte_t);
return;
}
static int
_mips_iterator_next(struct mips_iter *it, u_long *pa, u_long *va, u_long *dva,
vm_prot_t *prot)
{
struct vmstate *vm = it->kd->vmst;
int found = 0;
mips64_pte_t pte64;
mips32_pte_t pte32;
/*
* mips/mips/pmap.c: init_pte_prot / pmap_protect indicate that all
* pages are R|X at least.
*/
*prot = VM_PROT_READ | VM_PROT_EXECUTE;
*pa = 0;
*va = 0;
*dva = 0;
for (;it->pteindex < it->nptes && found == 0; it->pteindex++) {
if (vm->pte_size == 64) {
pte64 = _mips64_pte_get(it->kd, it->pteindex);
if ((pte64 & MIPS_PTE_V) == 0)
continue;
if ((pte64 & MIPS64_PTE_RO) == 0)
*prot |= VM_PROT_WRITE;
*pa = MIPS64_PTE_TO_PA(pte64);
} else {
pte32 = _mips32_pte_get(it->kd, it->pteindex);
if ((pte32 & MIPS_PTE_V) == 0)
continue;
if ((pte32 & MIPS32_PTE_RO) == 0)
*prot |= VM_PROT_WRITE;
*pa = MIPS32_PTE_TO_PA(pte32);
}
*va = vm->hdr.kernbase + (it->pteindex << MIPS_PAGE_SHIFT);
found = 1;
/* advance pteindex regardless */
}
return found;
}
static int
_mips_minidump_walk_pages(kvm_t *kd, kvm_walk_pages_cb_t *cb, void *arg)
{
struct mips_iter it;
u_long dva, pa, va;
vm_prot_t prot;
/* Generate direct mapped entries; need page entries for prot etc? */
if (kd->nlehdr.e_ident[EI_CLASS] == ELFCLASS64) {
/* MIPS_XKPHYS_START..MIPS_XKPHYS_END */
/* MIPS64_KSEG0_START..MIPS64_KSEG0_END */
/* MIPS64_KSEG1_START..MIPS64_KSEG1_START */
} else {
/* MIPS32_KSEG0_START..MIPS32_KSEG0_END */
/* MIPS32_KSEG1_START..MIPS32_KSEG1_END */
}
_mips_iterator_init(&it, kd);
while (_mips_iterator_next(&it, &pa, &va, &dva, &prot)) {
if (!_kvm_visit_cb(kd, cb, arg, pa, va, dva,
prot, MIPS_PAGE_SIZE, 0)) {
return (0);
}
}
return (1);
}
static struct kvm_arch kvm_mips_minidump = {
.ka_probe = _mips_minidump_probe,
.ka_initvtop = _mips_minidump_initvtop,
.ka_freevtop = _mips_minidump_freevtop,
.ka_kvatop = _mips_minidump_kvatop,
.ka_native = _mips_native,
.ka_walk_pages = _mips_minidump_walk_pages,
};
KVM_ARCH(kvm_mips_minidump);

117
lib/libkvm/kvm_mips.h
View File

@ -1,117 +0,0 @@
/*-
* Copyright (c) 2015 John H. Baldwin <jhb@FreeBSD.org>
*
* 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 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 AUTHOR 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.
*
* $FreeBSD$
*/
#ifndef __KVM_MIPS_H__
#define __KVM_MIPS_H__
#ifdef __mips__
#include <machine/pte.h>
#endif
typedef uint64_t mips_physaddr_t;
typedef uint32_t mips32_pte_t;
typedef uint64_t mips64_pte_t;
#define MIPS_PAGE_SHIFT 12
#define MIPS_PAGE_SIZE (1 << MIPS_PAGE_SHIFT)
#define MIPS_PAGE_MASK (MIPS_PAGE_SIZE - 1)
#define MIPS32_KSEG0_START 0x80000000
#define MIPS32_KSEG0_END 0x9fffffff
#define MIPS32_KSEG1_START 0xa0000000
#define MIPS32_KSEG1_END 0xbfffffff
#define MIPS64_KSEG0_START 0xffffffff80000000
#define MIPS64_KSEG0_END 0xffffffff9fffffff
#define MIPS64_KSEG1_START 0xffffffffa0000000
#define MIPS64_KSEG1_END 0xffffffffbfffffff
#define MIPS32_PFN_MASK (0x1FFFFFC0)
#define MIPS64_PFN_MASK 0x3FFFFFFC0
#define MIPS_PFN_SHIFT (6)
#define MIPS_PFN_TO_PA(pfn) (((pfn) >> MIPS_PFN_SHIFT) << MIPS_PAGE_SHIFT)
#define MIPS32_PTE_TO_PFN(pte) ((pte) & MIPS32_PFN_MASK)
#define MIPS32_PTE_TO_PA(pte) (MIPS_PFN_TO_PA(MIPS32_PTE_TO_PFN((pte))))
#define MIPS64_PTE_TO_PFN(pte) ((pte) & MIPS64_PFN_MASK)
#define MIPS64_PTE_TO_PA(pte) (MIPS_PFN_TO_PA(MIPS64_PTE_TO_PFN((pte))))
#define MIPS32_SWBITS_SHIFT 29
#define MIPS64_SWBITS_SHIFT 55
#define MIPS_PTE_V 0x02
#define MIPS32_PTE_RO ((mips32_pte_t)0x01 << MIPS32_SWBITS_SHIFT)
#define MIPS64_PTE_RO ((mips64_pte_t)0x01 << MIPS64_SWBITS_SHIFT)
static inline mips32_pte_t
_mips32_pte_get(kvm_t *kd, u_long pteindex)
{
mips32_pte_t *pte = _kvm_pmap_get(kd, pteindex, sizeof(*pte));
return _kvm32toh(kd, *pte);
}
static inline mips64_pte_t
_mips64_pte_get(kvm_t *kd, u_long pteindex)
{
mips64_pte_t *pte = _kvm_pmap_get(kd, pteindex, sizeof(*pte));
return _kvm64toh(kd, *pte);
}
#ifdef __mips__
_Static_assert(PAGE_SHIFT == MIPS_PAGE_SHIFT, "PAGE_SHIFT mismatch");
_Static_assert(PAGE_SIZE == MIPS_PAGE_SIZE, "PAGE_SIZE mismatch");
_Static_assert(PAGE_MASK == MIPS_PAGE_MASK, "PAGE_MASK mismatch");
#ifdef __mips_n64
_Static_assert((uint64_t)MIPS_KSEG0_START == MIPS64_KSEG0_START,
"MIPS_KSEG0_START mismatch");
_Static_assert((uint64_t)MIPS_KSEG0_END == MIPS64_KSEG0_END,
"MIPS_KSEG0_END mismatch");
_Static_assert((uint64_t)MIPS_KSEG1_START == MIPS64_KSEG1_START,
"MIPS_KSEG1_START mismatch");
_Static_assert((uint64_t)MIPS_KSEG1_END == MIPS64_KSEG1_END,
"MIPS_KSEG1_END mismatch");
#else
_Static_assert((uint32_t)MIPS_KSEG0_START == MIPS32_KSEG0_START,
"MIPS_KSEG0_START mismatch");
_Static_assert((uint32_t)MIPS_KSEG0_END == MIPS32_KSEG0_END,
"MIPS_KSEG0_END mismatch");
_Static_assert((uint32_t)MIPS_KSEG1_START == MIPS32_KSEG1_START,
"MIPS_KSEG1_START mismatch");
_Static_assert((uint32_t)MIPS_KSEG1_END == MIPS32_KSEG1_END,
"MIPS_KSEG1_END mismatch");
#endif
#if defined(__mips_n64) || defined(__mips_n32)
_Static_assert(TLBLO_PFN_MASK == MIPS64_PFN_MASK, "TLBLO_PFN_MASK mismatch");
#else
_Static_assert(TLBLO_PFN_MASK == MIPS32_PFN_MASK, "TLBLO_PFN_MASK mismatch");
#endif
_Static_assert(TLBLO_PFN_SHIFT == MIPS_PFN_SHIFT, "TLBLO_PFN_SHIFT mismatch");
_Static_assert(TLB_PAGE_SHIFT == MIPS_PAGE_SHIFT, "TLB_PAGE_SHIFT mismatch");
#endif
#endif /* !__KVM_MIPS_H__ */