xen-vtx-unstable

annotate xen/arch/x86/vmx_vmcs.c @ 3880:a42fd001d8f5

find changesets by author, revision, files, or words in the commit message
bitkeeper revision 1.1233 (421a1c36TYJWUEtp558QjJv1X0XXrQ)

If debugging is enabled, printout the e820 map for vmx guests.

Signed-off-by: michael.fetterman@cl.cam.ac.uk
author maf46@burn.cl.cam.ac.uk
date Mon Feb 21 17:36:54 2005 +0000 (2005-02-21)
parents ad1d06d64313
children 9a7751095472 a5931595eca4
rev   line source
kaf24@3677 1 /* -*- Mode:C; c-basic-offset:4; tab-width:4; indent-tabs-mode:nil -*- */
iap10@3290 2 /*
iap10@3290 3 * vmx_vmcs.c: VMCS management
iap10@3290 4 * Copyright (c) 2004, Intel Corporation.
iap10@3290 5 *
iap10@3290 6 * This program is free software; you can redistribute it and/or modify it
iap10@3290 7 * under the terms and conditions of the GNU General Public License,
iap10@3290 8 * version 2, as published by the Free Software Foundation.
iap10@3290 9 *
iap10@3290 10 * This program is distributed in the hope it will be useful, but WITHOUT
iap10@3290 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
iap10@3290 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
iap10@3290 13 * more details.
iap10@3290 14 *
iap10@3290 15 * You should have received a copy of the GNU General Public License along with
iap10@3290 16 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
iap10@3290 17 * Place - Suite 330, Boston, MA 02111-1307 USA.
iap10@3290 18 *
iap10@3290 19 */
iap10@3290 20
iap10@3290 21 #include <xen/config.h>
iap10@3290 22 #include <xen/init.h>
iap10@3290 23 #include <xen/mm.h>
iap10@3290 24 #include <xen/lib.h>
iap10@3290 25 #include <xen/errno.h>
iap10@3290 26
iap10@3290 27 #include <asm/cpufeature.h>
iap10@3290 28 #include <asm/processor.h>
iap10@3290 29 #include <asm/msr.h>
iap10@3290 30 #include <asm/vmx.h>
iap10@3290 31 #include <xen/event.h>
iap10@3290 32 #include <xen/kernel.h>
iap10@3290 33 #include <public/io/ioreq.h>
iap10@3290 34 #include <asm/domain_page.h>
iap10@3290 35
mafetter@3717 36 #ifdef CONFIG_VMX
mafetter@3717 37
iap10@3290 38 struct vmcs_struct *alloc_vmcs(void)
iap10@3290 39 {
iap10@3290 40 struct vmcs_struct *vmcs;
iap10@3290 41 unsigned int cpu_sig = cpuid_eax(0x00000001);
iap10@3290 42
iap10@3290 43 vmcs = (struct vmcs_struct *) alloc_xenheap_pages(get_order(vmcs_size));
iap10@3290 44 memset((char *) vmcs, 0, vmcs_size); /* don't remove this */
iap10@3290 45
iap10@3290 46 vmcs->vmcs_revision_id = (cpu_sig > 0xf41)? 3 : 1;
iap10@3290 47 return vmcs;
iap10@3290 48 }
iap10@3290 49
iap10@3290 50 void free_vmcs(struct vmcs_struct *vmcs)
iap10@3290 51 {
iap10@3290 52 int order;
iap10@3290 53
iap10@3290 54 order = (vmcs_size >> PAGE_SHIFT) - 1;
iap10@3290 55 free_xenheap_pages((unsigned long) vmcs, order);
iap10@3290 56 }
iap10@3290 57
iap10@3290 58 static inline int construct_vmcs_controls(void)
iap10@3290 59 {
iap10@3290 60 int error = 0;
iap10@3290 61
iap10@3290 62 error |= __vmwrite(PIN_BASED_VM_EXEC_CONTROL,
iap10@3290 63 MONITOR_PIN_BASED_EXEC_CONTROLS);
iap10@3290 64
iap10@3290 65 error |= __vmwrite(CPU_BASED_VM_EXEC_CONTROL,
iap10@3290 66 MONITOR_CPU_BASED_EXEC_CONTROLS);
iap10@3290 67
iap10@3290 68 error |= __vmwrite(VM_EXIT_CONTROLS, MONITOR_VM_EXIT_CONTROLS);
iap10@3290 69 error |= __vmwrite(VM_ENTRY_CONTROLS, MONITOR_VM_ENTRY_CONTROLS);
iap10@3290 70
iap10@3290 71 return error;
iap10@3290 72 }
iap10@3290 73
iap10@3290 74 #define GUEST_SEGMENT_LIMIT 0xffffffff
iap10@3290 75 #define HOST_SEGMENT_LIMIT 0xffffffff
iap10@3290 76
iap10@3290 77 struct host_execution_env {
iap10@3290 78 /* selectors */
iap10@3290 79 unsigned short ldtr_selector;
iap10@3290 80 unsigned short tr_selector;
iap10@3290 81 unsigned short ds_selector;
iap10@3290 82 unsigned short cs_selector;
iap10@3290 83 /* limits */
iap10@3290 84 unsigned short gdtr_limit;
iap10@3290 85 unsigned short ldtr_limit;
iap10@3290 86 unsigned short idtr_limit;
iap10@3290 87 unsigned short tr_limit;
iap10@3290 88 /* base */
iap10@3290 89 unsigned long gdtr_base;
iap10@3290 90 unsigned long ldtr_base;
iap10@3290 91 unsigned long idtr_base;
iap10@3290 92 unsigned long tr_base;
iap10@3290 93 unsigned long ds_base;
iap10@3290 94 unsigned long cs_base;
iap10@3290 95 /* control registers */
iap10@3290 96 unsigned long cr3;
iap10@3290 97 unsigned long cr0;
iap10@3290 98 unsigned long cr4;
iap10@3290 99 unsigned long dr7;
iap10@3290 100 };
iap10@3290 101
iap10@3290 102 #define round_pgdown(_p) ((_p)&PAGE_MASK) /* coped from domain.c */
iap10@3290 103
iap10@3290 104 int vmx_setup_platform(struct exec_domain *d, execution_context_t *context)
iap10@3290 105 {
iap10@3290 106 int i;
iap10@3290 107 unsigned int n;
iap10@3290 108 unsigned long *p, mpfn, offset, addr;
iap10@3290 109 struct e820entry *e820p;
iap10@3290 110 unsigned long gpfn = 0;
iap10@3290 111
iap10@3290 112 context->ebx = 0; /* Linux expects ebx to be 0 for boot proc */
iap10@3290 113
iap10@3290 114 n = context->ecx;
iap10@3290 115 if (n > 32) {
maf46@3855 116 VMX_DBG_LOG(DBG_LEVEL_1, "Too many e820 entries: %d", n);
iap10@3290 117 return -1;
iap10@3290 118 }
iap10@3290 119
iap10@3290 120 addr = context->edi;
iap10@3290 121 offset = (addr & ~PAGE_MASK);
iap10@3290 122 addr = round_pgdown(addr);
iap10@3707 123 mpfn = phys_to_machine_mapping(addr >> PAGE_SHIFT);
iap10@3290 124 p = map_domain_mem(mpfn << PAGE_SHIFT);
iap10@3290 125
iap10@3290 126 e820p = (struct e820entry *) ((unsigned long) p + offset);
iap10@3290 127
maf46@3880 128 #ifndef NDEBUG
maf46@3880 129 print_e820_memory_map(e820p, n);
maf46@3880 130 #endif
maf46@3880 131
iap10@3290 132 for (i = 0; i < n; i++) {
iap10@3290 133 if (e820p[i].type == E820_SHARED_PAGE) {
iap10@3290 134 gpfn = (e820p[i].addr >> PAGE_SHIFT);
iap10@3290 135 break;
iap10@3290 136 }
iap10@3290 137 }
iap10@3290 138
iap10@3290 139 if (gpfn == 0) {
iap10@3708 140 printk("No shared Page ?\n");
iap10@3708 141 unmap_domain_mem(p);
iap10@3290 142 return -1;
iap10@3290 143 }
iap10@3290 144 unmap_domain_mem(p);
iap10@3290 145
iap10@3707 146 mpfn = phys_to_machine_mapping(gpfn);
iap10@3290 147 p = map_domain_mem(mpfn << PAGE_SHIFT);
iap10@3708 148 ASSERT(p != NULL);
iap10@3748 149
iap10@3748 150 /* Initialise shared page */
iap10@3748 151 memset(p, 0, PAGE_SIZE);
iap10@3748 152
kaf24@3677 153 d->arch.arch_vmx.vmx_platform.shared_page_va = (unsigned long) p;
iap10@3290 154
iap10@3290 155 return 0;
iap10@3290 156 }
iap10@3290 157
iap10@3290 158 void vmx_do_launch(struct exec_domain *ed)
iap10@3290 159 {
iap10@3290 160 /* Update CR3, GDT, LDT, TR */
iap10@3290 161 unsigned int tr, cpu, error = 0;
iap10@3290 162 struct host_execution_env host_env;
iap10@3290 163 struct Xgt_desc_struct desc;
iap10@3290 164 struct list_head *list_ent;
maf46@3858 165 l2_pgentry_t *mpl2e, *hl2_vtable;
iap10@3290 166 unsigned long i, pfn = 0;
iap10@3290 167 struct pfn_info *page;
iap10@3290 168 execution_context_t *ec = get_execution_context();
iap10@3290 169 struct domain *d = ed->domain;
iap10@3290 170
iap10@3290 171 cpu = smp_processor_id();
kaf24@3677 172 d->arch.min_pfn = d->arch.max_pfn = 0;
iap10@3290 173
iap10@3290 174 spin_lock(&d->page_alloc_lock);
iap10@3290 175 list_ent = d->page_list.next;
iap10@3290 176
kaf24@3677 177 mpl2e = (l2_pgentry_t *)map_domain_mem(pagetable_val(ed->arch.monitor_table));
iap10@3290 178
kaf24@3303 179 for ( i = 0; list_ent != &d->page_list; i++ )
kaf24@3303 180 {
iap10@3290 181 pfn = list_entry(list_ent, struct pfn_info, list) - frame_table;
kaf24@3677 182 d->arch.min_pfn = min(d->arch.min_pfn, pfn);
kaf24@3677 183 d->arch.max_pfn = max(d->arch.max_pfn, pfn);
iap10@3290 184 list_ent = frame_table[pfn].list.next;
iap10@3290 185 }
iap10@3290 186
iap10@3290 187 spin_unlock(&d->page_alloc_lock);
iap10@3290 188
iap10@3290 189 page = (struct pfn_info *) alloc_domheap_page(NULL);
iap10@3290 190 pfn = (unsigned long) (page - frame_table);
iap10@3290 191
iap10@3290 192 /*
iap10@3290 193 * make linear_pt_table work for guest ptes
iap10@3290 194 */
iap10@3290 195 mpl2e[LINEAR_PT_VIRT_START >> L2_PAGETABLE_SHIFT] =
iap10@3290 196 mk_l2_pgentry((pfn << PAGE_SHIFT)| __PAGE_HYPERVISOR);
iap10@3290 197
maf46@3858 198 hl2_vtable = map_domain_mem(pfn << PAGE_SHIFT);
maf46@3858 199 memset(hl2_vtable, 0, PAGE_SIZE); /* clean it up */
maf46@3858 200 ed->arch.hl2_vtable = hl2_vtable;
iap10@3290 201
iap10@3290 202 unmap_domain_mem(mpl2e);
iap10@3290 203
iap10@3290 204 vmx_setup_platform(ed, ec);
iap10@3290 205
iap10@3290 206 __asm__ __volatile__ ("sgdt (%%eax) \n" :: "a"(&desc) : "memory");
iap10@3290 207 host_env.gdtr_limit = desc.size;
iap10@3290 208 host_env.gdtr_base = desc.address;
iap10@3290 209
iap10@3290 210 error |= __vmwrite(HOST_GDTR_BASE, host_env.gdtr_base);
iap10@3290 211
iap10@3290 212 error |= __vmwrite(GUEST_LDTR_SELECTOR, 0);
iap10@3290 213 error |= __vmwrite(GUEST_LDTR_BASE, 0);
iap10@3290 214 error |= __vmwrite(GUEST_LDTR_LIMIT, 0);
iap10@3290 215
iap10@3290 216 __asm__ __volatile__ ("str (%%eax) \n" :: "a"(&tr) : "memory");
iap10@3290 217 host_env.tr_selector = tr;
iap10@3290 218 host_env.tr_limit = sizeof(struct tss_struct);
iap10@3290 219 host_env.tr_base = (unsigned long) &init_tss[cpu];
iap10@3290 220
iap10@3290 221 error |= __vmwrite(HOST_TR_SELECTOR, host_env.tr_selector);
iap10@3290 222 error |= __vmwrite(HOST_TR_BASE, host_env.tr_base);
iap10@3290 223 error |= __vmwrite(GUEST_TR_BASE, 0);
iap10@3290 224 error |= __vmwrite(GUEST_TR_LIMIT, 0xff);
iap10@3290 225
iap10@3810 226 __vmwrite(GUEST_CR3, pagetable_val(ed->arch.guest_table));
kaf24@3677 227 __vmwrite(HOST_CR3, pagetable_val(ed->arch.monitor_table));
kaf24@3761 228 __vmwrite(HOST_ESP, (unsigned long)get_stack_bottom());
iap10@3290 229
kaf24@3677 230 ed->arch.schedule_tail = arch_vmx_do_resume;
iap10@3290 231 }
iap10@3290 232
iap10@3290 233 /*
iap10@3290 234 * Initially set the same environement as host.
iap10@3290 235 */
iap10@3290 236 static inline int
iap10@3290 237 construct_init_vmcs_guest(execution_context_t *context,
iap10@3290 238 full_execution_context_t *full_context,
iap10@3290 239 struct host_execution_env *host_env)
iap10@3290 240 {
iap10@3290 241 int error = 0;
iap10@3290 242 union vmcs_arbytes arbytes;
iap10@3290 243 unsigned long dr7;
iap10@3290 244 unsigned long eflags, shadow_cr;
iap10@3290 245
iap10@3290 246 /* MSR */
iap10@3290 247 error |= __vmwrite(VM_EXIT_MSR_LOAD_ADDR, 0);
iap10@3290 248 error |= __vmwrite(VM_EXIT_MSR_STORE_ADDR, 0);
iap10@3290 249
iap10@3290 250 error |= __vmwrite(VM_EXIT_MSR_STORE_COUNT, 0);
iap10@3290 251 error |= __vmwrite(VM_EXIT_MSR_LOAD_COUNT, 0);
iap10@3290 252 error |= __vmwrite(VM_ENTRY_MSR_LOAD_COUNT, 0);
iap10@3290 253 /* interrupt */
iap10@3290 254 error |= __vmwrite(VM_ENTRY_INTR_INFO_FIELD, 0);
iap10@3290 255 /* mask */
iap10@3290 256 error |= __vmwrite(CR0_GUEST_HOST_MASK, 0xffffffff);
iap10@3290 257 error |= __vmwrite(CR4_GUEST_HOST_MASK, 0xffffffff);
iap10@3290 258
iap10@3290 259 error |= __vmwrite(PAGE_FAULT_ERROR_CODE_MASK, 0);
iap10@3290 260 error |= __vmwrite(PAGE_FAULT_ERROR_CODE_MATCH, 0);
iap10@3290 261
iap10@3290 262 /* TSC */
iap10@3290 263 error |= __vmwrite(TSC_OFFSET, 0);
iap10@3290 264 error |= __vmwrite(CR3_TARGET_COUNT, 0);
iap10@3290 265
iap10@3290 266 /* Guest Selectors */
iap10@3290 267 error |= __vmwrite(GUEST_CS_SELECTOR, context->cs);
iap10@3290 268 error |= __vmwrite(GUEST_ES_SELECTOR, context->es);
iap10@3290 269 error |= __vmwrite(GUEST_SS_SELECTOR, context->ss);
iap10@3290 270 error |= __vmwrite(GUEST_DS_SELECTOR, context->ds);
iap10@3290 271 error |= __vmwrite(GUEST_FS_SELECTOR, context->fs);
iap10@3290 272 error |= __vmwrite(GUEST_GS_SELECTOR, context->gs);
iap10@3290 273
iap10@3290 274 /* Guest segment Limits */
iap10@3290 275 error |= __vmwrite(GUEST_CS_LIMIT, GUEST_SEGMENT_LIMIT);
iap10@3290 276 error |= __vmwrite(GUEST_ES_LIMIT, GUEST_SEGMENT_LIMIT);
iap10@3290 277 error |= __vmwrite(GUEST_SS_LIMIT, GUEST_SEGMENT_LIMIT);
iap10@3290 278 error |= __vmwrite(GUEST_DS_LIMIT, GUEST_SEGMENT_LIMIT);
iap10@3290 279 error |= __vmwrite(GUEST_FS_LIMIT, GUEST_SEGMENT_LIMIT);
iap10@3290 280 error |= __vmwrite(GUEST_GS_LIMIT, GUEST_SEGMENT_LIMIT);
iap10@3290 281
iap10@3290 282 error |= __vmwrite(GUEST_IDTR_LIMIT, host_env->idtr_limit);
iap10@3290 283
iap10@3290 284 /* AR bytes */
iap10@3290 285 arbytes.bytes = 0;
iap10@3290 286 arbytes.fields.seg_type = 0x3; /* type = 3 */
iap10@3290 287 arbytes.fields.s = 1; /* code or data, i.e. not system */
iap10@3290 288 arbytes.fields.dpl = 0; /* DPL = 3 */
iap10@3290 289 arbytes.fields.p = 1; /* segment present */
iap10@3290 290 arbytes.fields.default_ops_size = 1; /* 32-bit */
iap10@3290 291 arbytes.fields.g = 1;
iap10@3290 292 arbytes.fields.null_bit = 0; /* not null */
iap10@3290 293
iap10@3290 294 error |= __vmwrite(GUEST_ES_AR_BYTES, arbytes.bytes);
iap10@3290 295 error |= __vmwrite(GUEST_SS_AR_BYTES, arbytes.bytes);
iap10@3290 296 error |= __vmwrite(GUEST_DS_AR_BYTES, arbytes.bytes);
iap10@3290 297 error |= __vmwrite(GUEST_FS_AR_BYTES, arbytes.bytes);
iap10@3290 298 error |= __vmwrite(GUEST_GS_AR_BYTES, arbytes.bytes);
iap10@3290 299
iap10@3290 300 arbytes.fields.seg_type = 0xb; /* type = 0xb */
iap10@3290 301 error |= __vmwrite(GUEST_CS_AR_BYTES, arbytes.bytes);
iap10@3290 302
iap10@3290 303 error |= __vmwrite(GUEST_GDTR_BASE, context->edx);
iap10@3290 304 context->edx = 0;
iap10@3290 305 error |= __vmwrite(GUEST_GDTR_LIMIT, context->eax);
iap10@3290 306 context->eax = 0;
iap10@3290 307
iap10@3290 308 arbytes.fields.s = 0; /* not code or data segement */
iap10@3290 309 arbytes.fields.seg_type = 0x2; /* LTD */
iap10@3290 310 arbytes.fields.default_ops_size = 0; /* 16-bit */
iap10@3290 311 arbytes.fields.g = 0;
iap10@3290 312 error |= __vmwrite(GUEST_LDTR_AR_BYTES, arbytes.bytes);
iap10@3290 313
iap10@3290 314 arbytes.fields.seg_type = 0xb; /* 32-bit TSS (busy) */
iap10@3290 315 error |= __vmwrite(GUEST_TR_AR_BYTES, arbytes.bytes);
iap10@3290 316
iap10@3290 317 error |= __vmwrite(GUEST_CR0, host_env->cr0); /* same CR0 */
iap10@3290 318
iap10@3290 319 /* Initally PG, PE are not set*/
iap10@3290 320 shadow_cr = host_env->cr0;
iap10@3290 321 shadow_cr &= ~(X86_CR0_PE | X86_CR0_PG);
iap10@3290 322 error |= __vmwrite(CR0_READ_SHADOW, shadow_cr);
kaf24@3755 323 /* CR3 is set in vmx_final_setup_guest */
iap10@3290 324 error |= __vmwrite(GUEST_CR4, host_env->cr4);
iap10@3290 325 shadow_cr = host_env->cr4;
iap10@3290 326 shadow_cr &= ~(X86_CR4_PGE | X86_CR4_VMXE);
iap10@3290 327 error |= __vmwrite(CR4_READ_SHADOW, shadow_cr);
iap10@3290 328
iap10@3290 329 error |= __vmwrite(GUEST_ES_BASE, host_env->ds_base);
iap10@3290 330 error |= __vmwrite(GUEST_CS_BASE, host_env->cs_base);
iap10@3290 331 error |= __vmwrite(GUEST_SS_BASE, host_env->ds_base);
iap10@3290 332 error |= __vmwrite(GUEST_DS_BASE, host_env->ds_base);
iap10@3290 333 error |= __vmwrite(GUEST_FS_BASE, host_env->ds_base);
iap10@3290 334 error |= __vmwrite(GUEST_GS_BASE, host_env->ds_base);
iap10@3290 335 error |= __vmwrite(GUEST_IDTR_BASE, host_env->idtr_base);
iap10@3290 336
iap10@3290 337 error |= __vmwrite(GUEST_ESP, context->esp);
iap10@3290 338 error |= __vmwrite(GUEST_EIP, context->eip);
iap10@3290 339
iap10@3290 340 eflags = context->eflags & ~VMCS_EFLAGS_RESERVED_0; /* clear 0s */
iap10@3290 341 eflags |= VMCS_EFLAGS_RESERVED_1; /* set 1s */
iap10@3290 342
iap10@3290 343 error |= __vmwrite(GUEST_EFLAGS, eflags);
iap10@3290 344
iap10@3290 345 error |= __vmwrite(GUEST_INTERRUPTIBILITY_INFO, 0);
iap10@3290 346 __asm__ __volatile__ ("mov %%dr7, %0\n" : "=r" (dr7));
iap10@3290 347 error |= __vmwrite(GUEST_DR7, dr7);
iap10@3290 348 error |= __vmwrite(GUEST_VMCS0, 0xffffffff);
iap10@3290 349 error |= __vmwrite(GUEST_VMCS1, 0xffffffff);
iap10@3290 350
iap10@3290 351 return error;
iap10@3290 352 }
iap10@3290 353
iap10@3290 354 static inline int construct_vmcs_host(struct host_execution_env *host_env)
iap10@3290 355 {
iap10@3290 356 int error = 0;
iap10@3290 357 unsigned long crn;
iap10@3290 358 struct Xgt_desc_struct desc;
iap10@3290 359
iap10@3290 360 /* Host Selectors */
iap10@3290 361 host_env->ds_selector = __HYPERVISOR_DS;
iap10@3290 362 error |= __vmwrite(HOST_ES_SELECTOR, host_env->ds_selector);
iap10@3290 363 error |= __vmwrite(HOST_SS_SELECTOR, host_env->ds_selector);
iap10@3290 364 error |= __vmwrite(HOST_DS_SELECTOR, host_env->ds_selector);
iap10@3290 365 error |= __vmwrite(HOST_FS_SELECTOR, host_env->ds_selector);
iap10@3290 366 error |= __vmwrite(HOST_GS_SELECTOR, host_env->ds_selector);
iap10@3290 367
iap10@3290 368 host_env->cs_selector = __HYPERVISOR_CS;
iap10@3290 369 error |= __vmwrite(HOST_CS_SELECTOR, host_env->cs_selector);
iap10@3290 370
iap10@3290 371 host_env->ds_base = 0;
iap10@3290 372 host_env->cs_base = 0;
iap10@3290 373 error |= __vmwrite(HOST_FS_BASE, host_env->ds_base);
iap10@3290 374 error |= __vmwrite(HOST_GS_BASE, host_env->ds_base);
iap10@3290 375
iap10@3290 376 /* Debug */
iap10@3290 377 __asm__ __volatile__ ("sidt (%%eax) \n" :: "a"(&desc) : "memory");
iap10@3290 378 host_env->idtr_limit = desc.size;
iap10@3290 379 host_env->idtr_base = desc.address;
iap10@3290 380 error |= __vmwrite(HOST_IDTR_BASE, host_env->idtr_base);
iap10@3290 381
iap10@3290 382 __asm__ __volatile__ ("movl %%cr0,%0" : "=r" (crn) : );
iap10@3290 383 host_env->cr0 = crn;
iap10@3290 384 error |= __vmwrite(HOST_CR0, crn); /* same CR0 */
iap10@3290 385
iap10@3290 386 /* CR3 is set in vmx_final_setup_hostos */
iap10@3290 387 __asm__ __volatile__ ("movl %%cr4,%0" : "=r" (crn) : );
iap10@3290 388 host_env->cr4 = crn;
iap10@3290 389 error |= __vmwrite(HOST_CR4, crn);
iap10@3290 390 error |= __vmwrite(HOST_EIP, (unsigned long) vmx_asm_vmexit_handler);
iap10@3290 391
iap10@3290 392 return error;
iap10@3290 393 }
iap10@3290 394
iap10@3290 395 /*
iap10@3290 396 * Need to extend to support full virtualization.
iap10@3290 397 * The variable use_host_env indicates if the new VMCS needs to use
iap10@3290 398 * the same setups as the host has (xenolinux).
iap10@3290 399 */
iap10@3290 400
iap10@3290 401 int construct_vmcs(struct arch_vmx_struct *arch_vmx,
iap10@3290 402 execution_context_t *context,
iap10@3290 403 full_execution_context_t *full_context,
iap10@3290 404 int use_host_env)
iap10@3290 405 {
iap10@3290 406 int error;
iap10@3290 407 u64 vmcs_phys_ptr;
iap10@3290 408
iap10@3290 409 struct host_execution_env host_env;
iap10@3290 410
iap10@3290 411 if (use_host_env != VMCS_USE_HOST_ENV)
iap10@3290 412 return -EINVAL;
iap10@3290 413
iap10@3290 414 memset(&host_env, 0, sizeof(struct host_execution_env));
iap10@3290 415
iap10@3290 416 vmcs_phys_ptr = (u64) virt_to_phys(arch_vmx->vmcs);
iap10@3290 417
iap10@3290 418 if ((error = __vmpclear (vmcs_phys_ptr))) {
iap10@3290 419 printk("construct_vmcs: VMCLEAR failed\n");
iap10@3290 420 return -EINVAL;
iap10@3290 421 }
iap10@3290 422 if ((error = load_vmcs(arch_vmx, vmcs_phys_ptr))) {
iap10@3290 423 printk("construct_vmcs: load_vmcs failed: VMCS = %lx\n",
iap10@3290 424 (unsigned long) vmcs_phys_ptr);
iap10@3290 425 return -EINVAL;
iap10@3290 426 }
iap10@3290 427 if ((error = construct_vmcs_controls())) {
iap10@3290 428 printk("construct_vmcs: construct_vmcs_controls failed\n");
iap10@3290 429 return -EINVAL;
iap10@3290 430 }
iap10@3290 431 /* host selectors */
iap10@3290 432 if ((error = construct_vmcs_host(&host_env))) {
iap10@3290 433 printk("construct_vmcs: construct_vmcs_host failed\n");
iap10@3290 434 return -EINVAL;
iap10@3290 435 }
iap10@3290 436 /* guest selectors */
iap10@3290 437 if ((error = construct_init_vmcs_guest(context, full_context, &host_env))) {
iap10@3290 438 printk("construct_vmcs: construct_vmcs_guest failed\n");
iap10@3290 439 return -EINVAL;
iap10@3290 440 }
iap10@3290 441
iap10@3290 442 if ((error |= __vmwrite(EXCEPTION_BITMAP,
iap10@3290 443 MONITOR_DEFAULT_EXCEPTION_BITMAP))) {
iap10@3290 444 printk("construct_vmcs: setting Exception bitmap failed\n");
iap10@3290 445 return -EINVAL;
iap10@3290 446 }
iap10@3290 447
iap10@3290 448 return 0;
iap10@3290 449 }
iap10@3290 450
iap10@3290 451 int load_vmcs(struct arch_vmx_struct *arch_vmx, u64 phys_ptr)
iap10@3290 452 {
iap10@3290 453 int error;
iap10@3290 454
iap10@3290 455 if ((error = __vmptrld(phys_ptr))) {
iap10@3290 456 clear_bit(ARCH_VMX_VMCS_LOADED, &arch_vmx->flags);
iap10@3290 457 return error;
iap10@3290 458 }
iap10@3290 459 set_bit(ARCH_VMX_VMCS_LOADED, &arch_vmx->flags);
iap10@3290 460 return 0;
iap10@3290 461 }
iap10@3290 462
iap10@3290 463 int store_vmcs(struct arch_vmx_struct *arch_vmx, u64 phys_ptr)
iap10@3290 464 {
iap10@3290 465 /* take the current VMCS */
iap10@3290 466 __vmptrst(phys_ptr);
iap10@3290 467 clear_bit(ARCH_VMX_VMCS_LOADED, &arch_vmx->flags);
iap10@3290 468 return 0;
iap10@3290 469 }
iap10@3290 470
iap10@3290 471 void vm_launch_fail(unsigned long eflags)
iap10@3290 472 {
iap10@3290 473 BUG();
iap10@3290 474 }
iap10@3290 475
iap10@3290 476 void vm_resume_fail(unsigned long eflags)
iap10@3290 477 {
iap10@3290 478 BUG();
iap10@3290 479 }
iap10@3290 480
mafetter@3717 481 #endif /* CONFIG_VMX */