Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 1 | /* |
| 2 | * VMI specific paravirt-ops implementation |
| 3 | * |
| 4 | * Copyright (C) 2005, VMware, Inc. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, but |
| 12 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
| 14 | * NON INFRINGEMENT. See the GNU General Public License for more |
| 15 | * details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 | * |
| 21 | * Send feedback to zach@vmware.com |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include <linux/module.h> |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 26 | #include <linux/cpu.h> |
| 27 | #include <linux/bootmem.h> |
| 28 | #include <linux/mm.h> |
Zachary Amsden | eeef9c6 | 2007-05-02 19:27:16 +0200 | [diff] [blame] | 29 | #include <linux/highmem.h> |
Alexey Dobriyan | fa0aa86 | 2007-06-01 00:46:27 -0700 | [diff] [blame] | 30 | #include <linux/sched.h> |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 31 | #include <asm/vmi.h> |
| 32 | #include <asm/io.h> |
| 33 | #include <asm/fixmap.h> |
| 34 | #include <asm/apicdef.h> |
Ingo Molnar | 7b6aa33 | 2009-02-17 13:58:15 +0100 | [diff] [blame] | 35 | #include <asm/apic.h> |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 36 | #include <asm/processor.h> |
| 37 | #include <asm/timer.h> |
Zachary Amsden | bbab4f3 | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 38 | #include <asm/vmi_time.h> |
Adrian Bunk | 8f48561 | 2007-03-05 00:30:56 -0800 | [diff] [blame] | 39 | #include <asm/kmap_types.h> |
Alok Kataria | 31343d8 | 2008-08-08 12:15:57 -0700 | [diff] [blame] | 40 | #include <asm/setup.h> |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 41 | |
| 42 | /* Convenient for calling VMI functions indirectly in the ROM */ |
| 43 | typedef u32 __attribute__((regparm(1))) (VROMFUNC)(void); |
| 44 | typedef u64 __attribute__((regparm(2))) (VROMLONGFUNC)(int); |
| 45 | |
| 46 | #define call_vrom_func(rom,func) \ |
| 47 | (((VROMFUNC *)(rom->func))()) |
| 48 | |
| 49 | #define call_vrom_long_func(rom,func,arg) \ |
| 50 | (((VROMLONGFUNC *)(rom->func)) (arg)) |
| 51 | |
| 52 | static struct vrom_header *vmi_rom; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 53 | static int disable_pge; |
| 54 | static int disable_pse; |
| 55 | static int disable_sep; |
| 56 | static int disable_tsc; |
| 57 | static int disable_mtrr; |
Zachary Amsden | 7507ba3 | 2007-03-05 00:30:34 -0800 | [diff] [blame] | 58 | static int disable_noidle; |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 59 | static int disable_vmi_timer; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 60 | |
| 61 | /* Cached VMI operations */ |
Adrian Bunk | 30a1528 | 2007-05-02 19:27:08 +0200 | [diff] [blame] | 62 | static struct { |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 63 | void (*cpuid)(void /* non-c */); |
| 64 | void (*_set_ldt)(u32 selector); |
| 65 | void (*set_tr)(u32 selector); |
Glauber de Oliveira Costa | 8d94734 | 2008-01-30 13:31:12 +0100 | [diff] [blame] | 66 | void (*write_idt_entry)(struct desc_struct *, int, u32, u32); |
Glauber de Oliveira Costa | 014b15b | 2008-01-30 13:31:13 +0100 | [diff] [blame] | 67 | void (*write_gdt_entry)(struct desc_struct *, int, u32, u32); |
Glauber de Oliveira Costa | 75b8bb3 | 2008-01-30 13:31:13 +0100 | [diff] [blame] | 68 | void (*write_ldt_entry)(struct desc_struct *, int, u32, u32); |
H. Peter Anvin | faca622 | 2008-01-30 13:31:02 +0100 | [diff] [blame] | 69 | void (*set_kernel_stack)(u32 selector, u32 sp0); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 70 | void (*allocate_page)(u32, u32, u32, u32, u32); |
| 71 | void (*release_page)(u32, u32); |
| 72 | void (*set_pte)(pte_t, pte_t *, unsigned); |
| 73 | void (*update_pte)(pte_t *, unsigned); |
Zachary Amsden | eeef9c6 | 2007-05-02 19:27:16 +0200 | [diff] [blame] | 74 | void (*set_linear_mapping)(int, void *, u32, u32); |
| 75 | void (*_flush_tlb)(int); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 76 | void (*set_initial_ap_state)(int, int); |
Zachary Amsden | bbab4f3 | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 77 | void (*halt)(void); |
Zachary Amsden | 49f1971 | 2007-04-08 16:04:01 -0700 | [diff] [blame] | 78 | void (*set_lazy_mode)(int mode); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 79 | } vmi_ops; |
| 80 | |
Zachary Amsden | e0bb864 | 2007-05-02 19:27:16 +0200 | [diff] [blame] | 81 | /* Cached VMI operations */ |
| 82 | struct vmi_timer_ops vmi_timer_ops; |
| 83 | |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 84 | /* |
| 85 | * VMI patching routines. |
| 86 | */ |
| 87 | #define MNEM_CALL 0xe8 |
| 88 | #define MNEM_JMP 0xe9 |
| 89 | #define MNEM_RET 0xc3 |
| 90 | |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 91 | #define IRQ_PATCH_INT_MASK 0 |
| 92 | #define IRQ_PATCH_DISABLE 5 |
| 93 | |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 94 | static inline void patch_offset(void *insnbuf, |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 95 | unsigned long ip, unsigned long dest) |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 96 | { |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 97 | *(unsigned long *)(insnbuf+1) = dest-ip-5; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 98 | } |
| 99 | |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 100 | static unsigned patch_internal(int call, unsigned len, void *insnbuf, |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 101 | unsigned long ip) |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 102 | { |
| 103 | u64 reloc; |
| 104 | struct vmi_relocation_info *const rel = (struct vmi_relocation_info *)&reloc; |
| 105 | reloc = call_vrom_long_func(vmi_rom, get_reloc, call); |
| 106 | switch(rel->type) { |
| 107 | case VMI_RELOCATION_CALL_REL: |
| 108 | BUG_ON(len < 5); |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 109 | *(char *)insnbuf = MNEM_CALL; |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 110 | patch_offset(insnbuf, ip, (unsigned long)rel->eip); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 111 | return 5; |
| 112 | |
| 113 | case VMI_RELOCATION_JUMP_REL: |
| 114 | BUG_ON(len < 5); |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 115 | *(char *)insnbuf = MNEM_JMP; |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 116 | patch_offset(insnbuf, ip, (unsigned long)rel->eip); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 117 | return 5; |
| 118 | |
| 119 | case VMI_RELOCATION_NOP: |
| 120 | /* obliterate the whole thing */ |
| 121 | return 0; |
| 122 | |
| 123 | case VMI_RELOCATION_NONE: |
| 124 | /* leave native code in place */ |
| 125 | break; |
| 126 | |
| 127 | default: |
| 128 | BUG(); |
| 129 | } |
| 130 | return len; |
| 131 | } |
| 132 | |
| 133 | /* |
| 134 | * Apply patch if appropriate, return length of new instruction |
| 135 | * sequence. The callee does nop padding for us. |
| 136 | */ |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 137 | static unsigned vmi_patch(u8 type, u16 clobbers, void *insns, |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 138 | unsigned long ip, unsigned len) |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 139 | { |
| 140 | switch (type) { |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 141 | case PARAVIRT_PATCH(pv_irq_ops.irq_disable): |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 142 | return patch_internal(VMI_CALL_DisableInterrupts, len, |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 143 | insns, ip); |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 144 | case PARAVIRT_PATCH(pv_irq_ops.irq_enable): |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 145 | return patch_internal(VMI_CALL_EnableInterrupts, len, |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 146 | insns, ip); |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 147 | case PARAVIRT_PATCH(pv_irq_ops.restore_fl): |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 148 | return patch_internal(VMI_CALL_SetInterruptMask, len, |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 149 | insns, ip); |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 150 | case PARAVIRT_PATCH(pv_irq_ops.save_fl): |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 151 | return patch_internal(VMI_CALL_GetInterruptMask, len, |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 152 | insns, ip); |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 153 | case PARAVIRT_PATCH(pv_cpu_ops.iret): |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 154 | return patch_internal(VMI_CALL_IRET, len, insns, ip); |
Jeremy Fitzhardinge | d75cd22 | 2008-06-25 00:19:26 -0400 | [diff] [blame] | 155 | case PARAVIRT_PATCH(pv_cpu_ops.irq_enable_sysexit): |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 156 | return patch_internal(VMI_CALL_SYSEXIT, len, insns, ip); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 157 | default: |
| 158 | break; |
| 159 | } |
| 160 | return len; |
| 161 | } |
| 162 | |
| 163 | /* CPUID has non-C semantics, and paravirt-ops API doesn't match hardware ISA */ |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 164 | static void vmi_cpuid(unsigned int *ax, unsigned int *bx, |
| 165 | unsigned int *cx, unsigned int *dx) |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 166 | { |
| 167 | int override = 0; |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 168 | if (*ax == 1) |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 169 | override = 1; |
| 170 | asm volatile ("call *%6" |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 171 | : "=a" (*ax), |
| 172 | "=b" (*bx), |
| 173 | "=c" (*cx), |
| 174 | "=d" (*dx) |
| 175 | : "0" (*ax), "2" (*cx), "r" (vmi_ops.cpuid)); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 176 | if (override) { |
| 177 | if (disable_pse) |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 178 | *dx &= ~X86_FEATURE_PSE; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 179 | if (disable_pge) |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 180 | *dx &= ~X86_FEATURE_PGE; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 181 | if (disable_sep) |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 182 | *dx &= ~X86_FEATURE_SEP; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 183 | if (disable_tsc) |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 184 | *dx &= ~X86_FEATURE_TSC; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 185 | if (disable_mtrr) |
H. Peter Anvin | 65ea5b0 | 2008-01-30 13:30:56 +0100 | [diff] [blame] | 186 | *dx &= ~X86_FEATURE_MTRR; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 187 | } |
| 188 | } |
| 189 | |
| 190 | static inline void vmi_maybe_load_tls(struct desc_struct *gdt, int nr, struct desc_struct *new) |
| 191 | { |
| 192 | if (gdt[nr].a != new->a || gdt[nr].b != new->b) |
Glauber de Oliveira Costa | 014b15b | 2008-01-30 13:31:13 +0100 | [diff] [blame] | 193 | write_gdt_entry(gdt, nr, new, 0); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 194 | } |
| 195 | |
| 196 | static void vmi_load_tls(struct thread_struct *t, unsigned int cpu) |
| 197 | { |
| 198 | struct desc_struct *gdt = get_cpu_gdt_table(cpu); |
| 199 | vmi_maybe_load_tls(gdt, GDT_ENTRY_TLS_MIN + 0, &t->tls_array[0]); |
| 200 | vmi_maybe_load_tls(gdt, GDT_ENTRY_TLS_MIN + 1, &t->tls_array[1]); |
| 201 | vmi_maybe_load_tls(gdt, GDT_ENTRY_TLS_MIN + 2, &t->tls_array[2]); |
| 202 | } |
| 203 | |
| 204 | static void vmi_set_ldt(const void *addr, unsigned entries) |
| 205 | { |
| 206 | unsigned cpu = smp_processor_id(); |
Glauber de Oliveira Costa | 014b15b | 2008-01-30 13:31:13 +0100 | [diff] [blame] | 207 | struct desc_struct desc; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 208 | |
Glauber de Oliveira Costa | 014b15b | 2008-01-30 13:31:13 +0100 | [diff] [blame] | 209 | pack_descriptor(&desc, (unsigned long)addr, |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 210 | entries * sizeof(struct desc_struct) - 1, |
Glauber de Oliveira Costa | 014b15b | 2008-01-30 13:31:13 +0100 | [diff] [blame] | 211 | DESC_LDT, 0); |
| 212 | write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, &desc, DESC_LDT); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 213 | vmi_ops._set_ldt(entries ? GDT_ENTRY_LDT*sizeof(struct desc_struct) : 0); |
| 214 | } |
| 215 | |
| 216 | static void vmi_set_tr(void) |
| 217 | { |
| 218 | vmi_ops.set_tr(GDT_ENTRY_TSS*sizeof(struct desc_struct)); |
| 219 | } |
| 220 | |
Glauber de Oliveira Costa | 8d94734 | 2008-01-30 13:31:12 +0100 | [diff] [blame] | 221 | static void vmi_write_idt_entry(gate_desc *dt, int entry, const gate_desc *g) |
| 222 | { |
| 223 | u32 *idt_entry = (u32 *)g; |
Ingo Molnar | 262d5ee | 2008-02-04 16:47:54 +0100 | [diff] [blame] | 224 | vmi_ops.write_idt_entry(dt, entry, idt_entry[0], idt_entry[1]); |
Glauber de Oliveira Costa | 8d94734 | 2008-01-30 13:31:12 +0100 | [diff] [blame] | 225 | } |
| 226 | |
Glauber de Oliveira Costa | 014b15b | 2008-01-30 13:31:13 +0100 | [diff] [blame] | 227 | static void vmi_write_gdt_entry(struct desc_struct *dt, int entry, |
| 228 | const void *desc, int type) |
| 229 | { |
| 230 | u32 *gdt_entry = (u32 *)desc; |
Ingo Molnar | 262d5ee | 2008-02-04 16:47:54 +0100 | [diff] [blame] | 231 | vmi_ops.write_gdt_entry(dt, entry, gdt_entry[0], gdt_entry[1]); |
Glauber de Oliveira Costa | 014b15b | 2008-01-30 13:31:13 +0100 | [diff] [blame] | 232 | } |
| 233 | |
Glauber de Oliveira Costa | 75b8bb3 | 2008-01-30 13:31:13 +0100 | [diff] [blame] | 234 | static void vmi_write_ldt_entry(struct desc_struct *dt, int entry, |
| 235 | const void *desc) |
| 236 | { |
| 237 | u32 *ldt_entry = (u32 *)desc; |
Zachary Amsden | de59985 | 2008-09-30 11:02:12 -0700 | [diff] [blame] | 238 | vmi_ops.write_ldt_entry(dt, entry, ldt_entry[0], ldt_entry[1]); |
Glauber de Oliveira Costa | 75b8bb3 | 2008-01-30 13:31:13 +0100 | [diff] [blame] | 239 | } |
| 240 | |
H. Peter Anvin | faca622 | 2008-01-30 13:31:02 +0100 | [diff] [blame] | 241 | static void vmi_load_sp0(struct tss_struct *tss, |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 242 | struct thread_struct *thread) |
| 243 | { |
H. Peter Anvin | faca622 | 2008-01-30 13:31:02 +0100 | [diff] [blame] | 244 | tss->x86_tss.sp0 = thread->sp0; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 245 | |
| 246 | /* This can only happen when SEP is enabled, no need to test "SEP"arately */ |
Rusty Russell | a75c54f | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 247 | if (unlikely(tss->x86_tss.ss1 != thread->sysenter_cs)) { |
| 248 | tss->x86_tss.ss1 = thread->sysenter_cs; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 249 | wrmsr(MSR_IA32_SYSENTER_CS, thread->sysenter_cs, 0); |
| 250 | } |
H. Peter Anvin | faca622 | 2008-01-30 13:31:02 +0100 | [diff] [blame] | 251 | vmi_ops.set_kernel_stack(__KERNEL_DS, tss->x86_tss.sp0); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | static void vmi_flush_tlb_user(void) |
| 255 | { |
Zachary Amsden | eeef9c6 | 2007-05-02 19:27:16 +0200 | [diff] [blame] | 256 | vmi_ops._flush_tlb(VMI_FLUSH_TLB); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 257 | } |
| 258 | |
| 259 | static void vmi_flush_tlb_kernel(void) |
| 260 | { |
Zachary Amsden | eeef9c6 | 2007-05-02 19:27:16 +0200 | [diff] [blame] | 261 | vmi_ops._flush_tlb(VMI_FLUSH_TLB | VMI_FLUSH_GLOBAL); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 262 | } |
| 263 | |
| 264 | /* Stub to do nothing at all; used for delays and unimplemented calls */ |
| 265 | static void vmi_nop(void) |
| 266 | { |
| 267 | } |
| 268 | |
Zachary Amsden | eeef9c6 | 2007-05-02 19:27:16 +0200 | [diff] [blame] | 269 | #ifdef CONFIG_HIGHPTE |
| 270 | static void *vmi_kmap_atomic_pte(struct page *page, enum km_type type) |
Zachary Amsden | 9a1c13e | 2007-03-05 00:30:37 -0800 | [diff] [blame] | 271 | { |
Zachary Amsden | eeef9c6 | 2007-05-02 19:27:16 +0200 | [diff] [blame] | 272 | void *va = kmap_atomic(page, type); |
| 273 | |
Zachary Amsden | 9a1c13e | 2007-03-05 00:30:37 -0800 | [diff] [blame] | 274 | /* |
| 275 | * Internally, the VMI ROM must map virtual addresses to physical |
| 276 | * addresses for processing MMU updates. By the time MMU updates |
| 277 | * are issued, this information is typically already lost. |
| 278 | * Fortunately, the VMI provides a cache of mapping slots for active |
| 279 | * page tables. |
| 280 | * |
| 281 | * We use slot zero for the linear mapping of physical memory, and |
| 282 | * in HIGHPTE kernels, slot 1 and 2 for KM_PTE0 and KM_PTE1. |
| 283 | * |
| 284 | * args: SLOT VA COUNT PFN |
| 285 | */ |
| 286 | BUG_ON(type != KM_PTE0 && type != KM_PTE1); |
Zachary Amsden | eeef9c6 | 2007-05-02 19:27:16 +0200 | [diff] [blame] | 287 | vmi_ops.set_linear_mapping((type - KM_PTE0)+1, va, 1, page_to_pfn(page)); |
| 288 | |
| 289 | return va; |
Zachary Amsden | 9a1c13e | 2007-03-05 00:30:37 -0800 | [diff] [blame] | 290 | } |
Zachary Amsden | eeef9c6 | 2007-05-02 19:27:16 +0200 | [diff] [blame] | 291 | #endif |
Zachary Amsden | 9a1c13e | 2007-03-05 00:30:37 -0800 | [diff] [blame] | 292 | |
Eduardo Habkost | f863993 | 2008-07-30 18:32:27 -0300 | [diff] [blame] | 293 | static void vmi_allocate_pte(struct mm_struct *mm, unsigned long pfn) |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 294 | { |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 295 | vmi_ops.allocate_page(pfn, VMI_PAGE_L1, 0, 0, 0); |
| 296 | } |
| 297 | |
Eduardo Habkost | f863993 | 2008-07-30 18:32:27 -0300 | [diff] [blame] | 298 | static void vmi_allocate_pmd(struct mm_struct *mm, unsigned long pfn) |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 299 | { |
| 300 | /* |
| 301 | * This call comes in very early, before mem_map is setup. |
| 302 | * It is called only for swapper_pg_dir, which already has |
| 303 | * data on it. |
| 304 | */ |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 305 | vmi_ops.allocate_page(pfn, VMI_PAGE_L2, 0, 0, 0); |
| 306 | } |
| 307 | |
Eduardo Habkost | f863993 | 2008-07-30 18:32:27 -0300 | [diff] [blame] | 308 | static void vmi_allocate_pmd_clone(unsigned long pfn, unsigned long clonepfn, unsigned long start, unsigned long count) |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 309 | { |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 310 | vmi_ops.allocate_page(pfn, VMI_PAGE_L2 | VMI_PAGE_CLONE, clonepfn, start, count); |
| 311 | } |
| 312 | |
Eduardo Habkost | f863993 | 2008-07-30 18:32:27 -0300 | [diff] [blame] | 313 | static void vmi_release_pte(unsigned long pfn) |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 314 | { |
| 315 | vmi_ops.release_page(pfn, VMI_PAGE_L1); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 316 | } |
| 317 | |
Eduardo Habkost | f863993 | 2008-07-30 18:32:27 -0300 | [diff] [blame] | 318 | static void vmi_release_pmd(unsigned long pfn) |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 319 | { |
| 320 | vmi_ops.release_page(pfn, VMI_PAGE_L2); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 321 | } |
| 322 | |
| 323 | /* |
Alok Kataria | 55a8ba4 | 2009-02-06 10:29:35 -0800 | [diff] [blame] | 324 | * We use the pgd_free hook for releasing the pgd page: |
| 325 | */ |
| 326 | static void vmi_pgd_free(struct mm_struct *mm, pgd_t *pgd) |
| 327 | { |
| 328 | unsigned long pfn = __pa(pgd) >> PAGE_SHIFT; |
| 329 | |
| 330 | vmi_ops.release_page(pfn, VMI_PAGE_L2); |
| 331 | } |
| 332 | |
| 333 | /* |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 334 | * Helper macros for MMU update flags. We can defer updates until a flush |
| 335 | * or page invalidation only if the update is to the current address space |
| 336 | * (otherwise, there is no flush). We must check against init_mm, since |
| 337 | * this could be a kernel update, which usually passes init_mm, although |
| 338 | * sometimes this check can be skipped if we know the particular function |
| 339 | * is only called on user mode PTEs. We could change the kernel to pass |
| 340 | * current->active_mm here, but in particular, I was unsure if changing |
| 341 | * mm/highmem.c to do this would still be correct on other architectures. |
| 342 | */ |
| 343 | #define is_current_as(mm, mustbeuser) ((mm) == current->active_mm || \ |
| 344 | (!mustbeuser && (mm) == &init_mm)) |
| 345 | #define vmi_flags_addr(mm, addr, level, user) \ |
| 346 | ((level) | (is_current_as(mm, user) ? \ |
| 347 | (VMI_PAGE_CURRENT_AS | ((addr) & VMI_PAGE_VA_MASK)) : 0)) |
| 348 | #define vmi_flags_addr_defer(mm, addr, level, user) \ |
| 349 | ((level) | (is_current_as(mm, user) ? \ |
| 350 | (VMI_PAGE_DEFER | VMI_PAGE_CURRENT_AS | ((addr) & VMI_PAGE_VA_MASK)) : 0)) |
| 351 | |
Jeremy Fitzhardinge | 3dc494e | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 352 | static void vmi_update_pte(struct mm_struct *mm, unsigned long addr, pte_t *ptep) |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 353 | { |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 354 | vmi_ops.update_pte(ptep, vmi_flags_addr(mm, addr, VMI_PAGE_PT, 0)); |
| 355 | } |
| 356 | |
Jeremy Fitzhardinge | 3dc494e | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 357 | static void vmi_update_pte_defer(struct mm_struct *mm, unsigned long addr, pte_t *ptep) |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 358 | { |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 359 | vmi_ops.update_pte(ptep, vmi_flags_addr_defer(mm, addr, VMI_PAGE_PT, 0)); |
| 360 | } |
| 361 | |
| 362 | static void vmi_set_pte(pte_t *ptep, pte_t pte) |
| 363 | { |
| 364 | /* XXX because of set_pmd_pte, this can be called on PT or PD layers */ |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 365 | vmi_ops.set_pte(pte, ptep, VMI_PAGE_PT); |
| 366 | } |
| 367 | |
Jeremy Fitzhardinge | 3dc494e | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 368 | static void vmi_set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte) |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 369 | { |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 370 | vmi_ops.set_pte(pte, ptep, vmi_flags_addr(mm, addr, VMI_PAGE_PT, 0)); |
| 371 | } |
| 372 | |
| 373 | static void vmi_set_pmd(pmd_t *pmdp, pmd_t pmdval) |
| 374 | { |
| 375 | #ifdef CONFIG_X86_PAE |
Jeremy Fitzhardinge | e332870 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 376 | const pte_t pte = { .pte = pmdval.pmd }; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 377 | #else |
| 378 | const pte_t pte = { pmdval.pud.pgd.pgd }; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 379 | #endif |
| 380 | vmi_ops.set_pte(pte, (pte_t *)pmdp, VMI_PAGE_PD); |
| 381 | } |
| 382 | |
| 383 | #ifdef CONFIG_X86_PAE |
| 384 | |
| 385 | static void vmi_set_pte_atomic(pte_t *ptep, pte_t pteval) |
| 386 | { |
| 387 | /* |
| 388 | * XXX This is called from set_pmd_pte, but at both PT |
| 389 | * and PD layers so the VMI_PAGE_PT flag is wrong. But |
| 390 | * it is only called for large page mapping changes, |
| 391 | * the Xen backend, doesn't support large pages, and the |
| 392 | * ESX backend doesn't depend on the flag. |
| 393 | */ |
| 394 | set_64bit((unsigned long long *)ptep,pte_val(pteval)); |
| 395 | vmi_ops.update_pte(ptep, VMI_PAGE_PT); |
| 396 | } |
| 397 | |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 398 | static void vmi_set_pud(pud_t *pudp, pud_t pudval) |
| 399 | { |
| 400 | /* Um, eww */ |
Jeremy Fitzhardinge | e332870 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 401 | const pte_t pte = { .pte = pudval.pgd.pgd }; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 402 | vmi_ops.set_pte(pte, (pte_t *)pudp, VMI_PAGE_PDP); |
| 403 | } |
| 404 | |
| 405 | static void vmi_pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) |
| 406 | { |
Jeremy Fitzhardinge | e332870 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 407 | const pte_t pte = { .pte = 0 }; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 408 | vmi_ops.set_pte(pte, ptep, vmi_flags_addr(mm, addr, VMI_PAGE_PT, 0)); |
| 409 | } |
| 410 | |
Adrian Bunk | 8eb68fa | 2007-05-02 19:27:09 +0200 | [diff] [blame] | 411 | static void vmi_pmd_clear(pmd_t *pmd) |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 412 | { |
Jeremy Fitzhardinge | e332870 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 413 | const pte_t pte = { .pte = 0 }; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 414 | vmi_ops.set_pte(pte, (pte_t *)pmd, VMI_PAGE_PD); |
| 415 | } |
| 416 | #endif |
| 417 | |
| 418 | #ifdef CONFIG_SMP |
Zachary Amsden | c6b36e9 | 2007-03-05 00:30:43 -0800 | [diff] [blame] | 419 | static void __devinit |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 420 | vmi_startup_ipi_hook(int phys_apicid, unsigned long start_eip, |
| 421 | unsigned long start_esp) |
| 422 | { |
Zachary Amsden | c6b36e9 | 2007-03-05 00:30:43 -0800 | [diff] [blame] | 423 | struct vmi_ap_state ap; |
| 424 | |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 425 | /* Default everything to zero. This is fine for most GPRs. */ |
| 426 | memset(&ap, 0, sizeof(struct vmi_ap_state)); |
| 427 | |
| 428 | ap.gdtr_limit = GDT_SIZE - 1; |
| 429 | ap.gdtr_base = (unsigned long) get_cpu_gdt_table(phys_apicid); |
| 430 | |
| 431 | ap.idtr_limit = IDT_ENTRIES * 8 - 1; |
| 432 | ap.idtr_base = (unsigned long) idt_table; |
| 433 | |
| 434 | ap.ldtr = 0; |
| 435 | |
| 436 | ap.cs = __KERNEL_CS; |
| 437 | ap.eip = (unsigned long) start_eip; |
| 438 | ap.ss = __KERNEL_DS; |
| 439 | ap.esp = (unsigned long) start_esp; |
| 440 | |
| 441 | ap.ds = __USER_DS; |
| 442 | ap.es = __USER_DS; |
Jeremy Fitzhardinge | 7c3576d | 2007-05-02 19:27:16 +0200 | [diff] [blame] | 443 | ap.fs = __KERNEL_PERCPU; |
Alok Kataria | 7d5b005 | 2009-08-04 15:34:22 -0700 | [diff] [blame] | 444 | ap.gs = __KERNEL_STACK_CANARY; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 445 | |
| 446 | ap.eflags = 0; |
| 447 | |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 448 | #ifdef CONFIG_X86_PAE |
| 449 | /* efer should match BSP efer. */ |
| 450 | if (cpu_has_nx) { |
| 451 | unsigned l, h; |
| 452 | rdmsr(MSR_EFER, l, h); |
| 453 | ap.efer = (unsigned long long) h << 32 | l; |
| 454 | } |
| 455 | #endif |
| 456 | |
| 457 | ap.cr3 = __pa(swapper_pg_dir); |
| 458 | /* Protected mode, paging, AM, WP, NE, MP. */ |
| 459 | ap.cr0 = 0x80050023; |
| 460 | ap.cr4 = mmu_cr4_features; |
Zachary Amsden | c6b36e9 | 2007-03-05 00:30:43 -0800 | [diff] [blame] | 461 | vmi_ops.set_initial_ap_state((u32)&ap, phys_apicid); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 462 | } |
| 463 | #endif |
| 464 | |
Jeremy Fitzhardinge | 224101e | 2009-02-18 11:18:57 -0800 | [diff] [blame] | 465 | static void vmi_start_context_switch(struct task_struct *prev) |
Zachary Amsden | 49f1971 | 2007-04-08 16:04:01 -0700 | [diff] [blame] | 466 | { |
Jeremy Fitzhardinge | 224101e | 2009-02-18 11:18:57 -0800 | [diff] [blame] | 467 | paravirt_start_context_switch(prev); |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 468 | vmi_ops.set_lazy_mode(2); |
| 469 | } |
Zachary Amsden | 49f1971 | 2007-04-08 16:04:01 -0700 | [diff] [blame] | 470 | |
Jeremy Fitzhardinge | 224101e | 2009-02-18 11:18:57 -0800 | [diff] [blame] | 471 | static void vmi_end_context_switch(struct task_struct *next) |
Jeremy Fitzhardinge | b407fc5 | 2009-02-17 23:46:21 -0800 | [diff] [blame] | 472 | { |
| 473 | vmi_ops.set_lazy_mode(0); |
Jeremy Fitzhardinge | 224101e | 2009-02-18 11:18:57 -0800 | [diff] [blame] | 474 | paravirt_end_context_switch(next); |
Jeremy Fitzhardinge | b407fc5 | 2009-02-17 23:46:21 -0800 | [diff] [blame] | 475 | } |
| 476 | |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 477 | static void vmi_enter_lazy_mmu(void) |
| 478 | { |
| 479 | paravirt_enter_lazy_mmu(); |
| 480 | vmi_ops.set_lazy_mode(1); |
| 481 | } |
Zachary Amsden | 49f1971 | 2007-04-08 16:04:01 -0700 | [diff] [blame] | 482 | |
Jeremy Fitzhardinge | b407fc5 | 2009-02-17 23:46:21 -0800 | [diff] [blame] | 483 | static void vmi_leave_lazy_mmu(void) |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 484 | { |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 485 | vmi_ops.set_lazy_mode(0); |
Jeremy Fitzhardinge | b407fc5 | 2009-02-17 23:46:21 -0800 | [diff] [blame] | 486 | paravirt_leave_lazy_mmu(); |
Zachary Amsden | 49f1971 | 2007-04-08 16:04:01 -0700 | [diff] [blame] | 487 | } |
| 488 | |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 489 | static inline int __init check_vmi_rom(struct vrom_header *rom) |
| 490 | { |
| 491 | struct pci_header *pci; |
| 492 | struct pnp_header *pnp; |
| 493 | const char *manufacturer = "UNKNOWN"; |
| 494 | const char *product = "UNKNOWN"; |
| 495 | const char *license = "unspecified"; |
| 496 | |
| 497 | if (rom->rom_signature != 0xaa55) |
| 498 | return 0; |
| 499 | if (rom->vrom_signature != VMI_SIGNATURE) |
| 500 | return 0; |
| 501 | if (rom->api_version_maj != VMI_API_REV_MAJOR || |
| 502 | rom->api_version_min+1 < VMI_API_REV_MINOR+1) { |
| 503 | printk(KERN_WARNING "VMI: Found mismatched rom version %d.%d\n", |
| 504 | rom->api_version_maj, |
| 505 | rom->api_version_min); |
| 506 | return 0; |
| 507 | } |
| 508 | |
| 509 | /* |
| 510 | * Relying on the VMI_SIGNATURE field is not 100% safe, so check |
| 511 | * the PCI header and device type to make sure this is really a |
| 512 | * VMI device. |
| 513 | */ |
| 514 | if (!rom->pci_header_offs) { |
| 515 | printk(KERN_WARNING "VMI: ROM does not contain PCI header.\n"); |
| 516 | return 0; |
| 517 | } |
| 518 | |
| 519 | pci = (struct pci_header *)((char *)rom+rom->pci_header_offs); |
| 520 | if (pci->vendorID != PCI_VENDOR_ID_VMWARE || |
| 521 | pci->deviceID != PCI_DEVICE_ID_VMWARE_VMI) { |
| 522 | /* Allow it to run... anyways, but warn */ |
| 523 | printk(KERN_WARNING "VMI: ROM from unknown manufacturer\n"); |
| 524 | } |
| 525 | |
| 526 | if (rom->pnp_header_offs) { |
| 527 | pnp = (struct pnp_header *)((char *)rom+rom->pnp_header_offs); |
| 528 | if (pnp->manufacturer_offset) |
| 529 | manufacturer = (const char *)rom+pnp->manufacturer_offset; |
| 530 | if (pnp->product_offset) |
| 531 | product = (const char *)rom+pnp->product_offset; |
| 532 | } |
| 533 | |
| 534 | if (rom->license_offs) |
| 535 | license = (char *)rom+rom->license_offs; |
| 536 | |
| 537 | printk(KERN_INFO "VMI: Found %s %s, API version %d.%d, ROM version %d.%d\n", |
| 538 | manufacturer, product, |
| 539 | rom->api_version_maj, rom->api_version_min, |
| 540 | pci->rom_version_maj, pci->rom_version_min); |
| 541 | |
Andi Kleen | 302cf93 | 2007-03-16 21:07:36 +0100 | [diff] [blame] | 542 | /* Don't allow BSD/MIT here for now because we don't want to end up |
| 543 | with any binary only shim layers */ |
| 544 | if (strcmp(license, "GPL") && strcmp(license, "GPL v2")) { |
| 545 | printk(KERN_WARNING "VMI: Non GPL license `%s' found for ROM. Not used.\n", |
| 546 | license); |
| 547 | return 0; |
| 548 | } |
| 549 | |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 550 | return 1; |
| 551 | } |
| 552 | |
| 553 | /* |
| 554 | * Probe for the VMI option ROM |
| 555 | */ |
| 556 | static inline int __init probe_vmi_rom(void) |
| 557 | { |
| 558 | unsigned long base; |
| 559 | |
| 560 | /* VMI ROM is in option ROM area, check signature */ |
| 561 | for (base = 0xC0000; base < 0xE0000; base += 2048) { |
| 562 | struct vrom_header *romstart; |
| 563 | romstart = (struct vrom_header *)isa_bus_to_virt(base); |
| 564 | if (check_vmi_rom(romstart)) { |
| 565 | vmi_rom = romstart; |
| 566 | return 1; |
| 567 | } |
| 568 | } |
| 569 | return 0; |
| 570 | } |
| 571 | |
| 572 | /* |
| 573 | * VMI setup common to all processors |
| 574 | */ |
| 575 | void vmi_bringup(void) |
| 576 | { |
| 577 | /* We must establish the lowmem mapping for MMU ops to work */ |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 578 | if (vmi_ops.set_linear_mapping) |
Alok Kataria | 31343d8 | 2008-08-08 12:15:57 -0700 | [diff] [blame] | 579 | vmi_ops.set_linear_mapping(0, (void *)__PAGE_OFFSET, MAXMEM_PFN, 0); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 580 | } |
| 581 | |
| 582 | /* |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 583 | * Return a pointer to a VMI function or NULL if unimplemented |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 584 | */ |
| 585 | static void *vmi_get_function(int vmicall) |
| 586 | { |
| 587 | u64 reloc; |
| 588 | const struct vmi_relocation_info *rel = (struct vmi_relocation_info *)&reloc; |
| 589 | reloc = call_vrom_long_func(vmi_rom, get_reloc, vmicall); |
| 590 | BUG_ON(rel->type == VMI_RELOCATION_JUMP_REL); |
| 591 | if (rel->type == VMI_RELOCATION_CALL_REL) |
| 592 | return (void *)rel->eip; |
| 593 | else |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 594 | return NULL; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 595 | } |
| 596 | |
| 597 | /* |
| 598 | * Helper macro for making the VMI paravirt-ops fill code readable. |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 599 | * For unimplemented operations, fall back to default, unless nop |
| 600 | * is returned by the ROM. |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 601 | */ |
| 602 | #define para_fill(opname, vmicall) \ |
| 603 | do { \ |
| 604 | reloc = call_vrom_long_func(vmi_rom, get_reloc, \ |
| 605 | VMI_CALL_##vmicall); \ |
Zachary Amsden | 0492c37 | 2007-04-12 19:28:46 -0700 | [diff] [blame] | 606 | if (rel->type == VMI_RELOCATION_CALL_REL) \ |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 607 | opname = (void *)rel->eip; \ |
Zachary Amsden | 0492c37 | 2007-04-12 19:28:46 -0700 | [diff] [blame] | 608 | else if (rel->type == VMI_RELOCATION_NOP) \ |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 609 | opname = (void *)vmi_nop; \ |
Zachary Amsden | 0492c37 | 2007-04-12 19:28:46 -0700 | [diff] [blame] | 610 | else if (rel->type != VMI_RELOCATION_NONE) \ |
| 611 | printk(KERN_WARNING "VMI: Unknown relocation " \ |
| 612 | "type %d for " #vmicall"\n",\ |
| 613 | rel->type); \ |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 614 | } while (0) |
| 615 | |
| 616 | /* |
| 617 | * Helper macro for making the VMI paravirt-ops fill code readable. |
| 618 | * For cached operations which do not match the VMI ROM ABI and must |
| 619 | * go through a tranlation stub. Ignore NOPs, since it is not clear |
| 620 | * a NOP * VMI function corresponds to a NOP paravirt-op when the |
| 621 | * functions are not in 1-1 correspondence. |
| 622 | */ |
| 623 | #define para_wrap(opname, wrapper, cache, vmicall) \ |
| 624 | do { \ |
| 625 | reloc = call_vrom_long_func(vmi_rom, get_reloc, \ |
| 626 | VMI_CALL_##vmicall); \ |
| 627 | BUG_ON(rel->type == VMI_RELOCATION_JUMP_REL); \ |
| 628 | if (rel->type == VMI_RELOCATION_CALL_REL) { \ |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 629 | opname = wrapper; \ |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 630 | vmi_ops.cache = (void *)rel->eip; \ |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 631 | } \ |
| 632 | } while (0) |
| 633 | |
| 634 | /* |
| 635 | * Activate the VMI interface and switch into paravirtualized mode |
| 636 | */ |
| 637 | static inline int __init activate_vmi(void) |
| 638 | { |
| 639 | short kernel_cs; |
| 640 | u64 reloc; |
| 641 | const struct vmi_relocation_info *rel = (struct vmi_relocation_info *)&reloc; |
| 642 | |
| 643 | if (call_vrom_func(vmi_rom, vmi_init) != 0) { |
| 644 | printk(KERN_ERR "VMI ROM failed to initialize!"); |
| 645 | return 0; |
| 646 | } |
| 647 | savesegment(cs, kernel_cs); |
| 648 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 649 | pv_info.paravirt_enabled = 1; |
| 650 | pv_info.kernel_rpl = kernel_cs & SEGMENT_RPL_MASK; |
Alok Kataria | d0153ca | 2009-09-29 10:25:24 -0700 | [diff] [blame] | 651 | pv_info.name = "vmi [deprecated]"; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 652 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 653 | pv_init_ops.patch = vmi_patch; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 654 | |
| 655 | /* |
| 656 | * Many of these operations are ABI compatible with VMI. |
| 657 | * This means we can fill in the paravirt-ops with direct |
| 658 | * pointers into the VMI ROM. If the calling convention for |
| 659 | * these operations changes, this code needs to be updated. |
| 660 | * |
| 661 | * Exceptions |
| 662 | * CPUID paravirt-op uses pointers, not the native ISA |
| 663 | * halt has no VMI equivalent; all VMI halts are "safe" |
| 664 | * no MSR support yet - just trap and emulate. VMI uses the |
| 665 | * same ABI as the native ISA, but Linux wants exceptions |
| 666 | * from bogus MSR read / write handled |
| 667 | * rdpmc is not yet used in Linux |
| 668 | */ |
| 669 | |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 670 | /* CPUID is special, so very special it gets wrapped like a present */ |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 671 | para_wrap(pv_cpu_ops.cpuid, vmi_cpuid, cpuid, CPUID); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 672 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 673 | para_fill(pv_cpu_ops.clts, CLTS); |
| 674 | para_fill(pv_cpu_ops.get_debugreg, GetDR); |
| 675 | para_fill(pv_cpu_ops.set_debugreg, SetDR); |
| 676 | para_fill(pv_cpu_ops.read_cr0, GetCR0); |
| 677 | para_fill(pv_mmu_ops.read_cr2, GetCR2); |
| 678 | para_fill(pv_mmu_ops.read_cr3, GetCR3); |
| 679 | para_fill(pv_cpu_ops.read_cr4, GetCR4); |
| 680 | para_fill(pv_cpu_ops.write_cr0, SetCR0); |
| 681 | para_fill(pv_mmu_ops.write_cr2, SetCR2); |
| 682 | para_fill(pv_mmu_ops.write_cr3, SetCR3); |
| 683 | para_fill(pv_cpu_ops.write_cr4, SetCR4); |
Jeremy Fitzhardinge | 664c795 | 2009-01-30 23:18:41 -0800 | [diff] [blame] | 684 | |
| 685 | para_fill(pv_irq_ops.save_fl.func, GetInterruptMask); |
| 686 | para_fill(pv_irq_ops.restore_fl.func, SetInterruptMask); |
| 687 | para_fill(pv_irq_ops.irq_disable.func, DisableInterrupts); |
| 688 | para_fill(pv_irq_ops.irq_enable.func, EnableInterrupts); |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 689 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 690 | para_fill(pv_cpu_ops.wbinvd, WBINVD); |
| 691 | para_fill(pv_cpu_ops.read_tsc, RDTSC); |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 692 | |
| 693 | /* The following we emulate with trap and emulate for now */ |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 694 | /* paravirt_ops.read_msr = vmi_rdmsr */ |
| 695 | /* paravirt_ops.write_msr = vmi_wrmsr */ |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 696 | /* paravirt_ops.rdpmc = vmi_rdpmc */ |
| 697 | |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 698 | /* TR interface doesn't pass TR value, wrap */ |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 699 | para_wrap(pv_cpu_ops.load_tr_desc, vmi_set_tr, set_tr, SetTR); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 700 | |
| 701 | /* LDT is special, too */ |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 702 | para_wrap(pv_cpu_ops.set_ldt, vmi_set_ldt, _set_ldt, SetLDT); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 703 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 704 | para_fill(pv_cpu_ops.load_gdt, SetGDT); |
| 705 | para_fill(pv_cpu_ops.load_idt, SetIDT); |
| 706 | para_fill(pv_cpu_ops.store_gdt, GetGDT); |
| 707 | para_fill(pv_cpu_ops.store_idt, GetIDT); |
| 708 | para_fill(pv_cpu_ops.store_tr, GetTR); |
| 709 | pv_cpu_ops.load_tls = vmi_load_tls; |
Glauber de Oliveira Costa | 75b8bb3 | 2008-01-30 13:31:13 +0100 | [diff] [blame] | 710 | para_wrap(pv_cpu_ops.write_ldt_entry, vmi_write_ldt_entry, |
| 711 | write_ldt_entry, WriteLDTEntry); |
Glauber de Oliveira Costa | 014b15b | 2008-01-30 13:31:13 +0100 | [diff] [blame] | 712 | para_wrap(pv_cpu_ops.write_gdt_entry, vmi_write_gdt_entry, |
| 713 | write_gdt_entry, WriteGDTEntry); |
Glauber de Oliveira Costa | 8d94734 | 2008-01-30 13:31:12 +0100 | [diff] [blame] | 714 | para_wrap(pv_cpu_ops.write_idt_entry, vmi_write_idt_entry, |
| 715 | write_idt_entry, WriteIDTEntry); |
H. Peter Anvin | faca622 | 2008-01-30 13:31:02 +0100 | [diff] [blame] | 716 | para_wrap(pv_cpu_ops.load_sp0, vmi_load_sp0, set_kernel_stack, UpdateKernelStack); |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 717 | para_fill(pv_cpu_ops.set_iopl_mask, SetIOPLMask); |
| 718 | para_fill(pv_cpu_ops.io_delay, IODelay); |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 719 | |
Jeremy Fitzhardinge | 224101e | 2009-02-18 11:18:57 -0800 | [diff] [blame] | 720 | para_wrap(pv_cpu_ops.start_context_switch, vmi_start_context_switch, |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 721 | set_lazy_mode, SetLazyMode); |
Jeremy Fitzhardinge | 224101e | 2009-02-18 11:18:57 -0800 | [diff] [blame] | 722 | para_wrap(pv_cpu_ops.end_context_switch, vmi_end_context_switch, |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 723 | set_lazy_mode, SetLazyMode); |
| 724 | |
| 725 | para_wrap(pv_mmu_ops.lazy_mode.enter, vmi_enter_lazy_mmu, |
| 726 | set_lazy_mode, SetLazyMode); |
Jeremy Fitzhardinge | b407fc5 | 2009-02-17 23:46:21 -0800 | [diff] [blame] | 727 | para_wrap(pv_mmu_ops.lazy_mode.leave, vmi_leave_lazy_mmu, |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 728 | set_lazy_mode, SetLazyMode); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 729 | |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 730 | /* user and kernel flush are just handled with different flags to FlushTLB */ |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 731 | para_wrap(pv_mmu_ops.flush_tlb_user, vmi_flush_tlb_user, _flush_tlb, FlushTLB); |
| 732 | para_wrap(pv_mmu_ops.flush_tlb_kernel, vmi_flush_tlb_kernel, _flush_tlb, FlushTLB); |
| 733 | para_fill(pv_mmu_ops.flush_tlb_single, InvalPage); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 734 | |
| 735 | /* |
| 736 | * Until a standard flag format can be agreed on, we need to |
| 737 | * implement these as wrappers in Linux. Get the VMI ROM |
| 738 | * function pointers for the two backend calls. |
| 739 | */ |
| 740 | #ifdef CONFIG_X86_PAE |
| 741 | vmi_ops.set_pte = vmi_get_function(VMI_CALL_SetPxELong); |
| 742 | vmi_ops.update_pte = vmi_get_function(VMI_CALL_UpdatePxELong); |
| 743 | #else |
| 744 | vmi_ops.set_pte = vmi_get_function(VMI_CALL_SetPxE); |
| 745 | vmi_ops.update_pte = vmi_get_function(VMI_CALL_UpdatePxE); |
| 746 | #endif |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 747 | |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 748 | if (vmi_ops.set_pte) { |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 749 | pv_mmu_ops.set_pte = vmi_set_pte; |
| 750 | pv_mmu_ops.set_pte_at = vmi_set_pte_at; |
| 751 | pv_mmu_ops.set_pmd = vmi_set_pmd; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 752 | #ifdef CONFIG_X86_PAE |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 753 | pv_mmu_ops.set_pte_atomic = vmi_set_pte_atomic; |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 754 | pv_mmu_ops.set_pud = vmi_set_pud; |
| 755 | pv_mmu_ops.pte_clear = vmi_pte_clear; |
| 756 | pv_mmu_ops.pmd_clear = vmi_pmd_clear; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 757 | #endif |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 758 | } |
| 759 | |
| 760 | if (vmi_ops.update_pte) { |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 761 | pv_mmu_ops.pte_update = vmi_update_pte; |
| 762 | pv_mmu_ops.pte_update_defer = vmi_update_pte_defer; |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 763 | } |
| 764 | |
| 765 | vmi_ops.allocate_page = vmi_get_function(VMI_CALL_AllocatePage); |
| 766 | if (vmi_ops.allocate_page) { |
Jeremy Fitzhardinge | 6944a9c | 2008-03-17 16:37:01 -0700 | [diff] [blame] | 767 | pv_mmu_ops.alloc_pte = vmi_allocate_pte; |
| 768 | pv_mmu_ops.alloc_pmd = vmi_allocate_pmd; |
| 769 | pv_mmu_ops.alloc_pmd_clone = vmi_allocate_pmd_clone; |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 770 | } |
| 771 | |
| 772 | vmi_ops.release_page = vmi_get_function(VMI_CALL_ReleasePage); |
| 773 | if (vmi_ops.release_page) { |
Jeremy Fitzhardinge | 6944a9c | 2008-03-17 16:37:01 -0700 | [diff] [blame] | 774 | pv_mmu_ops.release_pte = vmi_release_pte; |
| 775 | pv_mmu_ops.release_pmd = vmi_release_pmd; |
Alok Kataria | 55a8ba4 | 2009-02-06 10:29:35 -0800 | [diff] [blame] | 776 | pv_mmu_ops.pgd_free = vmi_pgd_free; |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 777 | } |
Zachary Amsden | eeef9c6 | 2007-05-02 19:27:16 +0200 | [diff] [blame] | 778 | |
| 779 | /* Set linear is needed in all cases */ |
| 780 | vmi_ops.set_linear_mapping = vmi_get_function(VMI_CALL_SetLinearMapping); |
| 781 | #ifdef CONFIG_HIGHPTE |
| 782 | if (vmi_ops.set_linear_mapping) |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 783 | pv_mmu_ops.kmap_atomic_pte = vmi_kmap_atomic_pte; |
Jeremy Fitzhardinge | a27fe80 | 2007-05-02 19:27:15 +0200 | [diff] [blame] | 784 | #endif |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 785 | |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 786 | /* |
| 787 | * These MUST always be patched. Don't support indirect jumps |
| 788 | * through these operations, as the VMI interface may use either |
| 789 | * a jump or a call to get to these operations, depending on |
| 790 | * the backend. They are performance critical anyway, so requiring |
| 791 | * a patch is not a big problem. |
| 792 | */ |
Jeremy Fitzhardinge | d75cd22 | 2008-06-25 00:19:26 -0400 | [diff] [blame] | 793 | pv_cpu_ops.irq_enable_sysexit = (void *)0xfeedbab0; |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 794 | pv_cpu_ops.iret = (void *)0xbadbab0; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 795 | |
| 796 | #ifdef CONFIG_SMP |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 797 | para_wrap(pv_apic_ops.startup_ipi_hook, vmi_startup_ipi_hook, set_initial_ap_state, SetInitialAPState); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 798 | #endif |
| 799 | |
| 800 | #ifdef CONFIG_X86_LOCAL_APIC |
Yinghai Lu | c1eeb2d | 2009-02-16 23:02:14 -0800 | [diff] [blame] | 801 | para_fill(apic->read, APICRead); |
| 802 | para_fill(apic->write, APICWrite); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 803 | #endif |
| 804 | |
| 805 | /* |
Zachary Amsden | bbab4f3 | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 806 | * Check for VMI timer functionality by probing for a cycle frequency method |
| 807 | */ |
| 808 | reloc = call_vrom_long_func(vmi_rom, get_reloc, VMI_CALL_GetCycleFrequency); |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 809 | if (!disable_vmi_timer && rel->type != VMI_RELOCATION_NONE) { |
Zachary Amsden | bbab4f3 | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 810 | vmi_timer_ops.get_cycle_frequency = (void *)rel->eip; |
| 811 | vmi_timer_ops.get_cycle_counter = |
| 812 | vmi_get_function(VMI_CALL_GetCycleCounter); |
| 813 | vmi_timer_ops.get_wallclock = |
| 814 | vmi_get_function(VMI_CALL_GetWallclockTime); |
| 815 | vmi_timer_ops.wallclock_updated = |
| 816 | vmi_get_function(VMI_CALL_WallclockUpdated); |
| 817 | vmi_timer_ops.set_alarm = vmi_get_function(VMI_CALL_SetAlarm); |
| 818 | vmi_timer_ops.cancel_alarm = |
| 819 | vmi_get_function(VMI_CALL_CancelAlarm); |
Thomas Gleixner | 845b394 | 2009-08-19 15:37:03 +0200 | [diff] [blame] | 820 | x86_init.timers.timer_init = vmi_time_init; |
Zachary Amsden | bbab4f3 | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 821 | #ifdef CONFIG_X86_LOCAL_APIC |
Thomas Gleixner | 736deca | 2009-08-19 12:35:53 +0200 | [diff] [blame] | 822 | x86_init.timers.setup_percpu_clockev = vmi_time_bsp_init; |
| 823 | x86_cpuinit.setup_percpu_clockev = vmi_time_ap_init; |
Zachary Amsden | bbab4f3 | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 824 | #endif |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 825 | pv_time_ops.sched_clock = vmi_sched_clock; |
Thomas Gleixner | 2d82640 | 2009-08-20 17:06:25 +0200 | [diff] [blame] | 826 | x86_platform.calibrate_tsc = vmi_tsc_khz; |
Feng Tang | 7bd867d | 2009-09-10 10:48:56 +0800 | [diff] [blame] | 827 | x86_platform.get_wallclock = vmi_get_wallclock; |
| 828 | x86_platform.set_wallclock = vmi_set_wallclock; |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 829 | |
| 830 | /* We have true wallclock functions; disable CMOS clock sync */ |
| 831 | no_sync_cmos_clock = 1; |
| 832 | } else { |
| 833 | disable_noidle = 1; |
| 834 | disable_vmi_timer = 1; |
Zachary Amsden | bbab4f3 | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 835 | } |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 836 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 837 | para_fill(pv_irq_ops.safe_halt, Halt); |
Zachary Amsden | bbab4f3 | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 838 | |
| 839 | /* |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 840 | * Alternative instruction rewriting doesn't happen soon enough |
| 841 | * to convert VMI_IRET to a call instead of a jump; so we have |
| 842 | * to do this before IRQs get reenabled. Fortunately, it is |
| 843 | * idempotent. |
| 844 | */ |
Jeremy Fitzhardinge | 441d40d | 2007-05-02 19:27:16 +0200 | [diff] [blame] | 845 | apply_paravirt(__parainstructions, __parainstructions_end); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 846 | |
| 847 | vmi_bringup(); |
| 848 | |
| 849 | return 1; |
| 850 | } |
| 851 | |
| 852 | #undef para_fill |
| 853 | |
| 854 | void __init vmi_init(void) |
| 855 | { |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 856 | if (!vmi_rom) |
| 857 | probe_vmi_rom(); |
| 858 | else |
| 859 | check_vmi_rom(vmi_rom); |
| 860 | |
| 861 | /* In case probing for or validating the ROM failed, basil */ |
| 862 | if (!vmi_rom) |
| 863 | return; |
| 864 | |
| 865 | reserve_top_address(-vmi_rom->virtual_top); |
| 866 | |
Zachary Amsden | 7507ba3 | 2007-03-05 00:30:34 -0800 | [diff] [blame] | 867 | #ifdef CONFIG_X86_IO_APIC |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 868 | /* This is virtual hardware; timer routing is wired correctly */ |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 869 | no_timer_check = 1; |
| 870 | #endif |
Zachary Amsden | ae8d04e | 2008-12-13 12:36:58 -0800 | [diff] [blame] | 871 | } |
| 872 | |
Rakib Mullick | 659d261 | 2009-01-24 01:46:03 +0600 | [diff] [blame] | 873 | void __init vmi_activate(void) |
Zachary Amsden | ae8d04e | 2008-12-13 12:36:58 -0800 | [diff] [blame] | 874 | { |
| 875 | unsigned long flags; |
| 876 | |
| 877 | if (!vmi_rom) |
| 878 | return; |
| 879 | |
| 880 | local_irq_save(flags); |
| 881 | activate_vmi(); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 882 | local_irq_restore(flags & X86_EFLAGS_IF); |
| 883 | } |
| 884 | |
| 885 | static int __init parse_vmi(char *arg) |
| 886 | { |
| 887 | if (!arg) |
| 888 | return -EINVAL; |
| 889 | |
Zachary Amsden | eda08b1 | 2007-03-05 00:30:38 -0800 | [diff] [blame] | 890 | if (!strcmp(arg, "disable_pge")) { |
Jeremy Fitzhardinge | 53756d3 | 2008-01-30 13:30:55 +0100 | [diff] [blame] | 891 | clear_cpu_cap(&boot_cpu_data, X86_FEATURE_PGE); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 892 | disable_pge = 1; |
| 893 | } else if (!strcmp(arg, "disable_pse")) { |
Jeremy Fitzhardinge | 53756d3 | 2008-01-30 13:30:55 +0100 | [diff] [blame] | 894 | clear_cpu_cap(&boot_cpu_data, X86_FEATURE_PSE); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 895 | disable_pse = 1; |
| 896 | } else if (!strcmp(arg, "disable_sep")) { |
Jeremy Fitzhardinge | 53756d3 | 2008-01-30 13:30:55 +0100 | [diff] [blame] | 897 | clear_cpu_cap(&boot_cpu_data, X86_FEATURE_SEP); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 898 | disable_sep = 1; |
| 899 | } else if (!strcmp(arg, "disable_tsc")) { |
Jeremy Fitzhardinge | 53756d3 | 2008-01-30 13:30:55 +0100 | [diff] [blame] | 900 | clear_cpu_cap(&boot_cpu_data, X86_FEATURE_TSC); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 901 | disable_tsc = 1; |
| 902 | } else if (!strcmp(arg, "disable_mtrr")) { |
Jeremy Fitzhardinge | 53756d3 | 2008-01-30 13:30:55 +0100 | [diff] [blame] | 903 | clear_cpu_cap(&boot_cpu_data, X86_FEATURE_MTRR); |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 904 | disable_mtrr = 1; |
Zachary Amsden | 772205f | 2007-03-05 00:30:41 -0800 | [diff] [blame] | 905 | } else if (!strcmp(arg, "disable_timer")) { |
| 906 | disable_vmi_timer = 1; |
| 907 | disable_noidle = 1; |
Zachary Amsden | 7507ba3 | 2007-03-05 00:30:34 -0800 | [diff] [blame] | 908 | } else if (!strcmp(arg, "disable_noidle")) |
| 909 | disable_noidle = 1; |
Zachary Amsden | 7ce0bcf | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 910 | return 0; |
| 911 | } |
| 912 | |
| 913 | early_param("vmi", parse_vmi); |