[16] | 1 | /*************************************************************************** |
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| 2 | * |
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| 3 | * Copyright (C) 2001 International Business Machines |
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| 4 | * All rights reserved. |
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| 5 | * |
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| 6 | * This file is part of the GPFS mmfslinux kernel module. |
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| 7 | * |
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| 8 | * Redistribution and use in source and binary forms, with or without |
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| 9 | * modification, are permitted provided that the following conditions |
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| 10 | * are met: |
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| 11 | * |
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| 12 | * 1. Redistributions of source code must retain the above copyright notice, |
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| 13 | * this list of conditions and the following disclaimer. |
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| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 15 | * notice, this list of conditions and the following disclaimer in the |
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| 16 | * documentation and/or other materials provided with the distribution. |
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| 17 | * 3. The name of the author may not be used to endorse or promote products |
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| 18 | * derived from this software without specific prior written |
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| 19 | * permission. |
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| 20 | * |
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| 21 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 22 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 23 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 24 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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| 25 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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| 26 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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| 27 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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| 28 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
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| 29 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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| 30 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 31 | * |
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| 32 | *************************************************************************** */ |
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| 33 | /* @(#)86 1.19.1.5 src/avs/fs/mmfs/ts/kernext/gpl-linux/ia64/ss_ia64.c, mmfs, avs_rgpfs24, rgpfs24s008a 11/17/06 10:04:58 */ |
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| 34 | /* |
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| 35 | * Implementation of shared segment for GPFS daemon and GPFS kernel code. |
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| 36 | * |
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| 37 | */ |
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| 38 | |
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| 39 | #include <Shark-gpl.h> |
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| 40 | #include <Logger-gpl.h> |
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| 41 | #include <cxiSystem.h> |
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| 42 | #include <cxiIOBuffer.h> |
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| 43 | #include <cxiSharedSeg.h> |
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| 44 | #include <Trace.h> |
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| 45 | |
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| 46 | #include <linux/types.h> |
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| 47 | #include <linux/version.h> |
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| 48 | #include <linux/kernel.h> |
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| 49 | #include <linux/module.h> |
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| 50 | #include <linux/errno.h> |
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| 51 | #include <linux/slab.h> |
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| 52 | #include <linux/smp_lock.h> |
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| 53 | #include <linux/proc_fs.h> |
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| 54 | #include <linux/mm.h> |
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| 55 | #include <linux/fs.h> |
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| 56 | #include <linux/file.h> |
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| 57 | #include <linux/binfmts.h> |
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| 58 | #include <linux/vmalloc.h> |
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| 59 | #include <linux/signal.h> |
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| 60 | |
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| 61 | #include <asm/pgtable.h> |
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| 62 | #include <asm/pgalloc.h> |
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| 63 | #include <asm/io.h> |
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| 64 | #include <asm/uaccess.h> |
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| 65 | #include <asm/user.h> |
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| 66 | #include <asm/mman.h> |
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| 67 | #include <asm/atomic.h> |
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| 68 | #include <asm/ptrace.h> |
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| 69 | |
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| 70 | #include <verdep.h> |
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| 71 | #include <arch-gpl.h> |
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| 72 | |
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| 73 | #ifdef LEVEL_1 |
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| 74 | struct ia64_pfs { |
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| 75 | __u64 reserved0 : 62; |
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| 76 | __u64 ppl : 2; |
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| 77 | }; |
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| 78 | # define ia64_pfs(regs) ((struct ia64_pfs *) &(regs)->ar_pfs) |
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| 79 | #endif |
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| 80 | |
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| 81 | int |
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| 82 | set_privilege_level(unsigned long progLevel) |
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| 83 | { |
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| 84 | #ifdef LEVEL_1 |
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| 85 | unsigned long cpl; |
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| 86 | unsigned long new_cpl; |
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| 87 | unsigned long ipsr; |
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| 88 | unsigned long new_ipsr; |
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| 89 | unsigned long pfs; |
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| 90 | unsigned long new_pfs; |
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| 91 | struct pt_regs *regs; |
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| 92 | |
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| 93 | if (progLevel < 0 || progLevel > 3 || !cxiIsSuperUser()) |
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| 94 | return -1; |
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| 95 | |
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| 96 | #if LINUX_KERNEL_VERSION > 2061600 |
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| 97 | regs = task_pt_regs(current); |
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| 98 | #else |
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| 99 | regs = ia64_task_regs(current); |
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| 100 | #endif |
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| 101 | cpl = ia64_psr(regs)->cpl; |
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| 102 | ipsr = regs->cr_ipsr; |
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| 103 | pfs = regs->ar_pfs; |
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| 104 | |
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| 105 | ia64_psr(regs)->cpl = progLevel; // set current privilege level |
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| 106 | ia64_pfs(regs)->ppl = progLevel; // set previous privilege level |
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| 107 | |
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| 108 | new_ipsr = regs->cr_ipsr; |
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| 109 | new_pfs = regs->ar_pfs; |
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| 110 | |
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| 111 | TRACE5(TRACE_SHARED, 2, TRCID_SS_022, |
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| 112 | "set_privilege_level: cpl 0x%lX ipsr 0x%lX pfs 0x%lX new_ipsr 0x%lX new_pfs 0x%lX\n", |
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| 113 | cpl, ipsr, pfs, new_ipsr, new_pfs); |
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| 114 | |
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| 115 | #endif |
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| 116 | return 0; |
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| 117 | } |
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| 118 | |
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| 119 | int |
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| 120 | get_privilege_level() |
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| 121 | { |
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| 122 | unsigned long cpl; |
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| 123 | struct pt_regs *regs; |
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| 124 | unsigned long ipsr; |
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| 125 | unsigned long pfs; |
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| 126 | |
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| 127 | #if LINUX_KERNEL_VERSION > 2061600 |
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| 128 | regs = task_pt_regs(current); |
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| 129 | #else |
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| 130 | regs = ia64_task_regs(current); |
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| 131 | #endif |
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| 132 | cpl = ia64_psr(regs)->cpl; |
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| 133 | ipsr = regs->cr_ipsr; |
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| 134 | pfs = regs->ar_pfs; |
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| 135 | |
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| 136 | TRACE3(TRACE_SHARED, 2, TRCID_SS_022X, |
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| 137 | "get_privilege_level: cpl 0x%lX ipsr 0x%lX pfs 0x%lX\n", |
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| 138 | cpl, ipsr, pfs); |
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| 139 | |
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| 140 | return cpl; |
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| 141 | } |
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| 142 | |
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| 143 | int |
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| 144 | kxSaveThreadInfo(int tid, void* regP) |
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| 145 | { |
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| 146 | struct sigcontext *sc = (struct sigcontext *)regP; |
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| 147 | struct task_struct *g, *p; |
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| 148 | struct pt_regs *pt; |
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| 149 | int rc = ENOENT; |
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| 150 | |
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| 151 | read_lock(&tasklist_lock); |
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| 152 | DO_EACH_THREAD(g,p) |
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| 153 | { |
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| 154 | if (PROCESS_GROUP(current) == PROCESS_GROUP(p) && |
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| 155 | current->pid != tid && p->pid == tid) |
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| 156 | { |
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| 157 | #if LINUX_KERNEL_VERSION > 2061600 |
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| 158 | pt = task_pt_regs(p); |
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| 159 | #else |
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| 160 | pt = ia64_task_regs(p); |
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| 161 | #endif |
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| 162 | read_unlock(&tasklist_lock); |
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| 163 | |
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| 164 | rc = __put_user(pt->cr_iip, &sc->sc_ip); |
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| 165 | rc |= __put_user(pt->ar_bspstore, &sc->sc_ar_bsp); |
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| 166 | rc |= __put_user(pt->ar_pfs, &sc->sc_cfm); |
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| 167 | |
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| 168 | return rc; |
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| 169 | } |
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| 170 | } WHILE_EACH_THREAD(g,p); |
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| 171 | read_unlock(&tasklist_lock); |
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| 172 | return -1; |
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| 173 | } |
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| 174 | |
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| 175 | /* TLB flush routines for a single page or an address range. |
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| 176 | These are not exported by the kernel (like flush_tlb_all) |
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| 177 | and we want to do this at a finer granularity than flushing |
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| 178 | the entire TLB cache. |
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| 179 | The kernel serializes tlb cache flushes with the ptcg_lock, |
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| 180 | but we don't have access to this. */ |
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| 181 | |
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| 182 | void flush_tlb_page_ia64(unsigned long start_addr) |
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| 183 | { |
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| 184 | unsigned long addr = start_addr & ~(PAGE_SIZE - 1); /* page align */ |
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| 185 | |
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| 186 | /* ptc commands expect flush size starting at bit 2 of register */ |
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| 187 | #ifdef CONFIG_SMP |
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| 188 | __asm__ __volatile__ ("ptc.ga %0, %1;;" |
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| 189 | : |
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| 190 | : "r"(addr), |
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| 191 | "r"(PAGE_SHIFT << 2) |
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| 192 | : "memory"); |
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| 193 | #else |
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| 194 | __asm__ __volatile__ ("ptc.l %0, %1;;" |
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| 195 | : |
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| 196 | : "r"(addr), |
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| 197 | "r"(PAGE_SHIFT << 2) |
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| 198 | : "memory"); |
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| 199 | #endif /* CONFIG_SMP */ |
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| 200 | |
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| 201 | /* need to serialize */ |
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| 202 | __asm__ __volatile__ ("srlz.i;;" : : : "memory"); |
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| 203 | } |
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| 204 | |
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| 205 | void flush_tlb_range_ia64(unsigned long start_addr, unsigned long end_addr) |
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| 206 | { |
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| 207 | unsigned long addr = start_addr & ~(PAGE_SIZE - 1); /* page align */ |
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| 208 | |
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| 209 | while (addr < end_addr) |
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| 210 | { |
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| 211 | /* ptc commands expect flush size starting at bit 2 of register */ |
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| 212 | #ifdef CONFIG_SMP |
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| 213 | __asm__ __volatile__ ("ptc.ga %0, %1;;" |
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| 214 | : |
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| 215 | : "r"(addr), |
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| 216 | "r"(PAGE_SHIFT << 2) |
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| 217 | : "memory"); |
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| 218 | #else |
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| 219 | __asm__ __volatile__ ("ptc.l %0, %1;;" |
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| 220 | : |
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| 221 | : "r"(addr), |
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| 222 | "r"(PAGE_SHIFT << 2) |
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| 223 | : "memory"); |
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| 224 | #endif /* CONFIG_SMP */ |
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| 225 | |
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| 226 | /* need to serialize */ |
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| 227 | __asm__ __volatile__ ("srlz.i;;" : : : "memory"); |
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| 228 | |
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| 229 | addr += PAGE_SIZE; |
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| 230 | } |
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| 231 | } |
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