xen-vtx-unstable

annotate xen/arch/x86/vmx_vmcs.c @ 5727:ba925b4aef28

The 1:1 page table should be a 3 level PAE page table on x86-64

This is needed to support > 4GB machine physical addresses.

Signed-off-by: Chengyuan Li <chengyuan.li@intel.com>
Signed-off-by: Arun Sharma <arun.sharma@intel.com>
author kaf24@firebug.cl.cam.ac.uk
date Mon Jul 11 14:39:10 2005 +0000 (2005-07-11)
parents f261f14b9781
children 56a63f9f378f
rev   line source
iap10@3290 1 /*
iap10@3290 2 * vmx_vmcs.c: VMCS management
iap10@3290 3 * Copyright (c) 2004, Intel Corporation.
iap10@3290 4 *
iap10@3290 5 * This program is free software; you can redistribute it and/or modify it
iap10@3290 6 * under the terms and conditions of the GNU General Public License,
iap10@3290 7 * version 2, as published by the Free Software Foundation.
iap10@3290 8 *
iap10@3290 9 * This program is distributed in the hope it will be useful, but WITHOUT
iap10@3290 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
iap10@3290 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
iap10@3290 12 * more details.
iap10@3290 13 *
iap10@3290 14 * You should have received a copy of the GNU General Public License along with
iap10@3290 15 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
iap10@3290 16 * Place - Suite 330, Boston, MA 02111-1307 USA.
iap10@3290 17 *
iap10@3290 18 */
iap10@3290 19
iap10@3290 20 #include <xen/config.h>
iap10@3290 21 #include <xen/init.h>
iap10@3290 22 #include <xen/mm.h>
iap10@3290 23 #include <xen/lib.h>
iap10@3290 24 #include <xen/errno.h>
kaf24@5356 25 #include <xen/domain_page.h>
cl349@5291 26 #include <asm/current.h>
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>
kaf24@5722 31 #include <asm/flushtlb.h>
iap10@3290 32 #include <xen/event.h>
iap10@3290 33 #include <xen/kernel.h>
iap10@3290 34 #include <public/io/ioreq.h>
kaf24@5722 35 #if CONFIG_PAGING_LEVELS >= 4
kaf24@5722 36 #include <asm/shadow_64.h>
kaf24@5722 37 #endif
mafetter@3717 38 #ifdef CONFIG_VMX
mafetter@3717 39
iap10@3290 40 struct vmcs_struct *alloc_vmcs(void)
iap10@3290 41 {
iap10@3290 42 struct vmcs_struct *vmcs;
kaf24@5059 43 u32 vmx_msr_low, vmx_msr_high;
iap10@3290 44
kaf24@5059 45 rdmsr(MSR_IA32_VMX_BASIC_MSR, vmx_msr_low, vmx_msr_high);
kaf24@5059 46 vmcs_size = vmx_msr_high & 0x1fff;
kaf24@5398 47 vmcs = alloc_xenheap_pages(get_order(vmcs_size));
kaf24@5398 48 memset((char *)vmcs, 0, vmcs_size); /* don't remove this */
iap10@3290 49
kaf24@5059 50 vmcs->vmcs_revision_id = vmx_msr_low;
iap10@3290 51 return vmcs;
iap10@3290 52 }
iap10@3290 53
iap10@3290 54 void free_vmcs(struct vmcs_struct *vmcs)
iap10@3290 55 {
iap10@3290 56 int order;
iap10@3290 57
iap10@3290 58 order = (vmcs_size >> PAGE_SHIFT) - 1;
kaf24@5398 59 free_xenheap_pages(vmcs, order);
iap10@3290 60 }
iap10@3290 61
iap10@3290 62 static inline int construct_vmcs_controls(void)
iap10@3290 63 {
iap10@3290 64 int error = 0;
iap10@3290 65
iap10@3290 66 error |= __vmwrite(PIN_BASED_VM_EXEC_CONTROL,
iap10@3290 67 MONITOR_PIN_BASED_EXEC_CONTROLS);
iap10@3290 68
iap10@3290 69 error |= __vmwrite(CPU_BASED_VM_EXEC_CONTROL,
iap10@3290 70 MONITOR_CPU_BASED_EXEC_CONTROLS);
kaf24@5658 71 #if defined (__x86_64__)
kaf24@5658 72 error |= __vmwrite(VM_EXIT_CONTROLS,
kaf24@5658 73 MONITOR_VM_EXIT_CONTROLS | VM_EXIT_CONTROLS_IA_32E_MODE);
kaf24@5658 74 #else
iap10@3290 75 error |= __vmwrite(VM_EXIT_CONTROLS, MONITOR_VM_EXIT_CONTROLS);
kaf24@5658 76 #endif
iap10@3290 77 error |= __vmwrite(VM_ENTRY_CONTROLS, MONITOR_VM_ENTRY_CONTROLS);
iap10@3290 78
iap10@3290 79 return error;
iap10@3290 80 }
iap10@3290 81
iap10@3290 82 #define GUEST_SEGMENT_LIMIT 0xffffffff
iap10@3290 83 #define HOST_SEGMENT_LIMIT 0xffffffff
iap10@3290 84
iap10@3290 85 struct host_execution_env {
iap10@3290 86 /* selectors */
iap10@3290 87 unsigned short ldtr_selector;
iap10@3290 88 unsigned short tr_selector;
iap10@3290 89 unsigned short ds_selector;
iap10@3290 90 unsigned short cs_selector;
iap10@3290 91 /* limits */
iap10@3290 92 unsigned short gdtr_limit;
iap10@3290 93 unsigned short ldtr_limit;
iap10@3290 94 unsigned short idtr_limit;
iap10@3290 95 unsigned short tr_limit;
iap10@3290 96 /* base */
iap10@3290 97 unsigned long gdtr_base;
iap10@3290 98 unsigned long ldtr_base;
iap10@3290 99 unsigned long idtr_base;
iap10@3290 100 unsigned long tr_base;
iap10@3290 101 unsigned long ds_base;
iap10@3290 102 unsigned long cs_base;
kaf24@5658 103 #ifdef __x86_64__
kaf24@5658 104 unsigned long fs_base;
kaf24@5658 105 unsigned long gs_base;
kaf24@5658 106 #endif
kaf24@5658 107
iap10@3290 108 /* control registers */
iap10@3290 109 unsigned long cr3;
iap10@3290 110 unsigned long cr0;
iap10@3290 111 unsigned long cr4;
iap10@3290 112 unsigned long dr7;
iap10@3290 113 };
iap10@3290 114
iap10@3290 115 #define round_pgdown(_p) ((_p)&PAGE_MASK) /* coped from domain.c */
iap10@3290 116
kaf24@5289 117 int vmx_setup_platform(struct vcpu *d, struct cpu_user_regs *regs)
iap10@3290 118 {
iap10@3290 119 int i;
iap10@3290 120 unsigned int n;
iap10@3290 121 unsigned long *p, mpfn, offset, addr;
iap10@3290 122 struct e820entry *e820p;
iap10@3290 123 unsigned long gpfn = 0;
iap10@3290 124
kaf24@5727 125 local_flush_tlb_pge();
kaf24@4683 126 regs->ebx = 0; /* Linux expects ebx to be 0 for boot proc */
iap10@3290 127
kaf24@4683 128 n = regs->ecx;
iap10@3290 129 if (n > 32) {
maf46@3855 130 VMX_DBG_LOG(DBG_LEVEL_1, "Too many e820 entries: %d", n);
iap10@3290 131 return -1;
iap10@3290 132 }
iap10@3290 133
kaf24@4683 134 addr = regs->edi;
iap10@3290 135 offset = (addr & ~PAGE_MASK);
iap10@3290 136 addr = round_pgdown(addr);
kaf24@5356 137
iap10@3707 138 mpfn = phys_to_machine_mapping(addr >> PAGE_SHIFT);
kaf24@5356 139 p = map_domain_page(mpfn);
iap10@3290 140
iap10@3290 141 e820p = (struct e820entry *) ((unsigned long) p + offset);
iap10@3290 142
maf46@3880 143 #ifndef NDEBUG
maf46@3880 144 print_e820_memory_map(e820p, n);
maf46@3880 145 #endif
maf46@3880 146
kaf24@5356 147 for ( i = 0; i < n; i++ )
kaf24@5356 148 {
kaf24@5356 149 if ( e820p[i].type == E820_SHARED_PAGE )
kaf24@5356 150 {
iap10@3290 151 gpfn = (e820p[i].addr >> PAGE_SHIFT);
iap10@3290 152 break;
iap10@3290 153 }
iap10@3290 154 }
iap10@3290 155
kaf24@5356 156 if ( gpfn == 0 )
kaf24@5356 157 {
kaf24@5356 158 unmap_domain_page(p);
iap10@3290 159 return -1;
iap10@3290 160 }
iap10@3290 161
kaf24@5356 162 unmap_domain_page(p);
iap10@3748 163
iap10@3748 164 /* Initialise shared page */
kaf24@5356 165 mpfn = phys_to_machine_mapping(gpfn);
kaf24@5356 166 p = map_domain_page(mpfn);
arun@5608 167 d->domain->arch.vmx_platform.shared_page_va = (unsigned long)p;
arun@5608 168
arun@5615 169 VMX_DBG_LOG(DBG_LEVEL_1, "eport: %x\n", iopacket_port(d->domain));
arun@5615 170
arun@5608 171 clear_bit(iopacket_port(d->domain),
arun@5608 172 &d->domain->shared_info->evtchn_mask[0]);
iap10@3290 173
iap10@3290 174 return 0;
iap10@3290 175 }
iap10@3290 176
kaf24@5289 177 void vmx_do_launch(struct vcpu *v)
iap10@3290 178 {
iap10@3290 179 /* Update CR3, GDT, LDT, TR */
iap10@3290 180 unsigned int tr, cpu, error = 0;
iap10@3290 181 struct host_execution_env host_env;
iap10@3290 182 struct Xgt_desc_struct desc;
kaf24@4633 183 unsigned long pfn = 0;
iap10@3290 184 struct pfn_info *page;
kaf24@4923 185 struct cpu_user_regs *regs = guest_cpu_user_regs();
iap10@3290 186
cl349@4856 187 vmx_stts();
cl349@4856 188
kaf24@4633 189 cpu = smp_processor_id();
iap10@3290 190
iap10@3290 191 page = (struct pfn_info *) alloc_domheap_page(NULL);
iap10@3290 192 pfn = (unsigned long) (page - frame_table);
iap10@3290 193
kaf24@5289 194 vmx_setup_platform(v, regs);
iap10@3290 195
arun@4585 196 __asm__ __volatile__ ("sgdt (%0) \n" :: "a"(&desc) : "memory");
iap10@3290 197 host_env.gdtr_limit = desc.size;
iap10@3290 198 host_env.gdtr_base = desc.address;
iap10@3290 199
iap10@3290 200 error |= __vmwrite(HOST_GDTR_BASE, host_env.gdtr_base);
iap10@3290 201
iap10@3290 202 error |= __vmwrite(GUEST_LDTR_SELECTOR, 0);
iap10@3290 203 error |= __vmwrite(GUEST_LDTR_BASE, 0);
iap10@3290 204 error |= __vmwrite(GUEST_LDTR_LIMIT, 0);
iap10@3290 205
arun@4585 206 __asm__ __volatile__ ("str (%0) \n" :: "a"(&tr) : "memory");
iap10@3290 207 host_env.tr_selector = tr;
iap10@3290 208 host_env.tr_limit = sizeof(struct tss_struct);
iap10@3290 209 host_env.tr_base = (unsigned long) &init_tss[cpu];
iap10@3290 210
iap10@3290 211 error |= __vmwrite(HOST_TR_SELECTOR, host_env.tr_selector);
iap10@3290 212 error |= __vmwrite(HOST_TR_BASE, host_env.tr_base);
iap10@3290 213 error |= __vmwrite(GUEST_TR_BASE, 0);
iap10@3290 214 error |= __vmwrite(GUEST_TR_LIMIT, 0xff);
iap10@3290 215
kaf24@5289 216 __vmwrite(GUEST_CR3, pagetable_get_paddr(v->arch.guest_table));
kaf24@5289 217 __vmwrite(HOST_CR3, pagetable_get_paddr(v->arch.monitor_table));
kaf24@5414 218 __vmwrite(HOST_RSP, (unsigned long)get_stack_bottom());
iap10@3290 219
kaf24@5289 220 v->arch.schedule_tail = arch_vmx_do_resume;
iap10@3290 221 }
iap10@3290 222
iap10@3290 223 /*
iap10@3290 224 * Initially set the same environement as host.
iap10@3290 225 */
iap10@3290 226 static inline int
kaf24@4683 227 construct_init_vmcs_guest(struct cpu_user_regs *regs,
kaf24@4683 228 struct vcpu_guest_context *ctxt,
iap10@3290 229 struct host_execution_env *host_env)
iap10@3290 230 {
iap10@3290 231 int error = 0;
iap10@3290 232 union vmcs_arbytes arbytes;
iap10@3290 233 unsigned long dr7;
iap10@3290 234 unsigned long eflags, shadow_cr;
iap10@3290 235
iap10@3290 236 /* MSR */
iap10@3290 237 error |= __vmwrite(VM_EXIT_MSR_LOAD_ADDR, 0);
iap10@3290 238 error |= __vmwrite(VM_EXIT_MSR_STORE_ADDR, 0);
iap10@3290 239
iap10@3290 240 error |= __vmwrite(VM_EXIT_MSR_STORE_COUNT, 0);
iap10@3290 241 error |= __vmwrite(VM_EXIT_MSR_LOAD_COUNT, 0);
iap10@3290 242 error |= __vmwrite(VM_ENTRY_MSR_LOAD_COUNT, 0);
iap10@3290 243 /* interrupt */
iap10@3290 244 error |= __vmwrite(VM_ENTRY_INTR_INFO_FIELD, 0);
iap10@3290 245 /* mask */
kaf24@5658 246 error |= __vmwrite(CR0_GUEST_HOST_MASK, -1UL);
kaf24@5658 247 error |= __vmwrite(CR4_GUEST_HOST_MASK, -1UL);
iap10@3290 248
iap10@3290 249 error |= __vmwrite(PAGE_FAULT_ERROR_CODE_MASK, 0);
iap10@3290 250 error |= __vmwrite(PAGE_FAULT_ERROR_CODE_MATCH, 0);
iap10@3290 251
iap10@3290 252 /* TSC */
iap10@3290 253 error |= __vmwrite(TSC_OFFSET, 0);
iap10@3290 254 error |= __vmwrite(CR3_TARGET_COUNT, 0);
iap10@3290 255
iap10@3290 256 /* Guest Selectors */
kaf24@4683 257 error |= __vmwrite(GUEST_CS_SELECTOR, regs->cs);
kaf24@4683 258 error |= __vmwrite(GUEST_ES_SELECTOR, regs->es);
kaf24@4683 259 error |= __vmwrite(GUEST_SS_SELECTOR, regs->ss);
kaf24@4683 260 error |= __vmwrite(GUEST_DS_SELECTOR, regs->ds);
kaf24@4683 261 error |= __vmwrite(GUEST_FS_SELECTOR, regs->fs);
kaf24@4683 262 error |= __vmwrite(GUEST_GS_SELECTOR, regs->gs);
iap10@3290 263
iap10@3290 264 /* Guest segment Limits */
iap10@3290 265 error |= __vmwrite(GUEST_CS_LIMIT, GUEST_SEGMENT_LIMIT);
iap10@3290 266 error |= __vmwrite(GUEST_ES_LIMIT, GUEST_SEGMENT_LIMIT);
iap10@3290 267 error |= __vmwrite(GUEST_SS_LIMIT, GUEST_SEGMENT_LIMIT);
iap10@3290 268 error |= __vmwrite(GUEST_DS_LIMIT, GUEST_SEGMENT_LIMIT);
iap10@3290 269 error |= __vmwrite(GUEST_FS_LIMIT, GUEST_SEGMENT_LIMIT);
iap10@3290 270 error |= __vmwrite(GUEST_GS_LIMIT, GUEST_SEGMENT_LIMIT);
iap10@3290 271
iap10@3290 272 error |= __vmwrite(GUEST_IDTR_LIMIT, host_env->idtr_limit);
iap10@3290 273
iap10@3290 274 /* AR bytes */
iap10@3290 275 arbytes.bytes = 0;
iap10@3290 276 arbytes.fields.seg_type = 0x3; /* type = 3 */
iap10@3290 277 arbytes.fields.s = 1; /* code or data, i.e. not system */
iap10@3290 278 arbytes.fields.dpl = 0; /* DPL = 3 */
iap10@3290 279 arbytes.fields.p = 1; /* segment present */
iap10@3290 280 arbytes.fields.default_ops_size = 1; /* 32-bit */
iap10@3290 281 arbytes.fields.g = 1;
iap10@3290 282 arbytes.fields.null_bit = 0; /* not null */
iap10@3290 283
iap10@3290 284 error |= __vmwrite(GUEST_ES_AR_BYTES, arbytes.bytes);
iap10@3290 285 error |= __vmwrite(GUEST_SS_AR_BYTES, arbytes.bytes);
iap10@3290 286 error |= __vmwrite(GUEST_DS_AR_BYTES, arbytes.bytes);
iap10@3290 287 error |= __vmwrite(GUEST_FS_AR_BYTES, arbytes.bytes);
iap10@3290 288 error |= __vmwrite(GUEST_GS_AR_BYTES, arbytes.bytes);
iap10@3290 289
iap10@3290 290 arbytes.fields.seg_type = 0xb; /* type = 0xb */
iap10@3290 291 error |= __vmwrite(GUEST_CS_AR_BYTES, arbytes.bytes);
iap10@3290 292
kaf24@4683 293 error |= __vmwrite(GUEST_GDTR_BASE, regs->edx);
kaf24@4683 294 regs->edx = 0;
kaf24@4683 295 error |= __vmwrite(GUEST_GDTR_LIMIT, regs->eax);
kaf24@4683 296 regs->eax = 0;
iap10@3290 297
iap10@3290 298 arbytes.fields.s = 0; /* not code or data segement */
iap10@3290 299 arbytes.fields.seg_type = 0x2; /* LTD */
iap10@3290 300 arbytes.fields.default_ops_size = 0; /* 16-bit */
iap10@3290 301 arbytes.fields.g = 0;
iap10@3290 302 error |= __vmwrite(GUEST_LDTR_AR_BYTES, arbytes.bytes);
iap10@3290 303
iap10@3290 304 arbytes.fields.seg_type = 0xb; /* 32-bit TSS (busy) */
iap10@3290 305 error |= __vmwrite(GUEST_TR_AR_BYTES, arbytes.bytes);
iap10@3290 306
iap10@3290 307 error |= __vmwrite(GUEST_CR0, host_env->cr0); /* same CR0 */
iap10@3290 308
iap10@3290 309 /* Initally PG, PE are not set*/
iap10@3290 310 shadow_cr = host_env->cr0;
arun@5186 311 shadow_cr &= ~X86_CR0_PG;
iap10@3290 312 error |= __vmwrite(CR0_READ_SHADOW, shadow_cr);
kaf24@3755 313 /* CR3 is set in vmx_final_setup_guest */
kaf24@5658 314 #ifdef __x86_64__
kaf24@5727 315 error |= __vmwrite(GUEST_CR4, host_env->cr4 & ~X86_CR4_PSE);
kaf24@5658 316 #else
iap10@3290 317 error |= __vmwrite(GUEST_CR4, host_env->cr4);
kaf24@5658 318 #endif
iap10@3290 319 shadow_cr = host_env->cr4;
kaf24@5658 320
kaf24@5658 321 #ifdef __x86_64__
kaf24@5658 322 shadow_cr &= ~(X86_CR4_PGE | X86_CR4_VMXE | X86_CR4_PAE);
kaf24@5658 323 #else
iap10@3290 324 shadow_cr &= ~(X86_CR4_PGE | X86_CR4_VMXE);
kaf24@5658 325 #endif
iap10@3290 326 error |= __vmwrite(CR4_READ_SHADOW, shadow_cr);
iap10@3290 327
iap10@3290 328 error |= __vmwrite(GUEST_ES_BASE, host_env->ds_base);
iap10@3290 329 error |= __vmwrite(GUEST_CS_BASE, host_env->cs_base);
iap10@3290 330 error |= __vmwrite(GUEST_SS_BASE, host_env->ds_base);
iap10@3290 331 error |= __vmwrite(GUEST_DS_BASE, host_env->ds_base);
iap10@3290 332 error |= __vmwrite(GUEST_FS_BASE, host_env->ds_base);
iap10@3290 333 error |= __vmwrite(GUEST_GS_BASE, host_env->ds_base);
iap10@3290 334 error |= __vmwrite(GUEST_IDTR_BASE, host_env->idtr_base);
iap10@3290 335
kaf24@5414 336 error |= __vmwrite(GUEST_RSP, regs->esp);
kaf24@5414 337 error |= __vmwrite(GUEST_RIP, regs->eip);
iap10@3290 338
kaf24@4683 339 eflags = regs->eflags & ~VMCS_EFLAGS_RESERVED_0; /* clear 0s */
iap10@3290 340 eflags |= VMCS_EFLAGS_RESERVED_1; /* set 1s */
iap10@3290 341
kaf24@5414 342 error |= __vmwrite(GUEST_RFLAGS, eflags);
iap10@3290 343
iap10@3290 344 error |= __vmwrite(GUEST_INTERRUPTIBILITY_INFO, 0);
iap10@3290 345 __asm__ __volatile__ ("mov %%dr7, %0\n" : "=r" (dr7));
iap10@3290 346 error |= __vmwrite(GUEST_DR7, dr7);
kaf24@5414 347 error |= __vmwrite(VMCS_LINK_POINTER, 0xffffffff);
kaf24@5414 348 error |= __vmwrite(VMCS_LINK_POINTER_HIGH, 0xffffffff);
iap10@3290 349
iap10@3290 350 return error;
iap10@3290 351 }
iap10@3290 352
iap10@3290 353 static inline int construct_vmcs_host(struct host_execution_env *host_env)
iap10@3290 354 {
iap10@3290 355 int error = 0;
iap10@3290 356 unsigned long crn;
iap10@3290 357 struct Xgt_desc_struct desc;
iap10@3290 358
iap10@3290 359 /* Host Selectors */
iap10@3290 360 host_env->ds_selector = __HYPERVISOR_DS;
iap10@3290 361 error |= __vmwrite(HOST_ES_SELECTOR, host_env->ds_selector);
iap10@3290 362 error |= __vmwrite(HOST_SS_SELECTOR, host_env->ds_selector);
iap10@3290 363 error |= __vmwrite(HOST_DS_SELECTOR, host_env->ds_selector);
kaf24@5658 364 #if defined (__i386__)
iap10@3290 365 error |= __vmwrite(HOST_FS_SELECTOR, host_env->ds_selector);
iap10@3290 366 error |= __vmwrite(HOST_GS_SELECTOR, host_env->ds_selector);
kaf24@5658 367 error |= __vmwrite(HOST_FS_BASE, host_env->ds_base);
kaf24@5658 368 error |= __vmwrite(HOST_GS_BASE, host_env->ds_base);
iap10@3290 369
kaf24@5658 370 #else
kaf24@5658 371 rdmsrl(MSR_FS_BASE, host_env->fs_base);
kaf24@5658 372 rdmsrl(MSR_GS_BASE, host_env->gs_base);
kaf24@5658 373 error |= __vmwrite(HOST_FS_BASE, host_env->fs_base);
kaf24@5658 374 error |= __vmwrite(HOST_GS_BASE, host_env->gs_base);
kaf24@5658 375
kaf24@5658 376 #endif
iap10@3290 377 host_env->cs_selector = __HYPERVISOR_CS;
iap10@3290 378 error |= __vmwrite(HOST_CS_SELECTOR, host_env->cs_selector);
iap10@3290 379
iap10@3290 380 host_env->ds_base = 0;
iap10@3290 381 host_env->cs_base = 0;
iap10@3290 382
iap10@3290 383 /* Debug */
arun@4585 384 __asm__ __volatile__ ("sidt (%0) \n" :: "a"(&desc) : "memory");
iap10@3290 385 host_env->idtr_limit = desc.size;
iap10@3290 386 host_env->idtr_base = desc.address;
iap10@3290 387 error |= __vmwrite(HOST_IDTR_BASE, host_env->idtr_base);
iap10@3290 388
kaf24@5193 389 __asm__ __volatile__ ("mov %%cr0,%0" : "=r" (crn) : );
arun@4588 390
iap10@3290 391 host_env->cr0 = crn;
iap10@3290 392 error |= __vmwrite(HOST_CR0, crn); /* same CR0 */
iap10@3290 393
iap10@3290 394 /* CR3 is set in vmx_final_setup_hostos */
kaf24@5193 395 __asm__ __volatile__ ("mov %%cr4,%0" : "=r" (crn) : );
iap10@3290 396 host_env->cr4 = crn;
iap10@3290 397 error |= __vmwrite(HOST_CR4, crn);
kaf24@5414 398 error |= __vmwrite(HOST_RIP, (unsigned long) vmx_asm_vmexit_handler);
kaf24@5658 399 #ifdef __x86_64__
kaf24@5658 400 /* TBD: support cr8 for 64-bit guest */
kaf24@5658 401 __vmwrite(VIRTUAL_APIC_PAGE_ADDR, 0);
kaf24@5658 402 __vmwrite(TPR_THRESHOLD, 0);
kaf24@5658 403 __vmwrite(SECONDARY_VM_EXEC_CONTROL, 0);
kaf24@5658 404 #endif
iap10@3290 405
iap10@3290 406 return error;
iap10@3290 407 }
iap10@3290 408
iap10@3290 409 /*
iap10@3290 410 * Need to extend to support full virtualization.
iap10@3290 411 * The variable use_host_env indicates if the new VMCS needs to use
iap10@3290 412 * the same setups as the host has (xenolinux).
iap10@3290 413 */
iap10@3290 414
iap10@3290 415 int construct_vmcs(struct arch_vmx_struct *arch_vmx,
kaf24@4683 416 struct cpu_user_regs *regs,
kaf24@4683 417 struct vcpu_guest_context *ctxt,
iap10@3290 418 int use_host_env)
iap10@3290 419 {
iap10@3290 420 int error;
iap10@3290 421 u64 vmcs_phys_ptr;
iap10@3290 422
iap10@3290 423 struct host_execution_env host_env;
iap10@3290 424
iap10@3290 425 if (use_host_env != VMCS_USE_HOST_ENV)
iap10@3290 426 return -EINVAL;
iap10@3290 427
iap10@3290 428 memset(&host_env, 0, sizeof(struct host_execution_env));
iap10@3290 429
iap10@3290 430 vmcs_phys_ptr = (u64) virt_to_phys(arch_vmx->vmcs);
iap10@3290 431
iap10@3290 432 if ((error = __vmpclear (vmcs_phys_ptr))) {
iap10@3290 433 printk("construct_vmcs: VMCLEAR failed\n");
iap10@3290 434 return -EINVAL;
iap10@3290 435 }
iap10@3290 436 if ((error = load_vmcs(arch_vmx, vmcs_phys_ptr))) {
iap10@3290 437 printk("construct_vmcs: load_vmcs failed: VMCS = %lx\n",
iap10@3290 438 (unsigned long) vmcs_phys_ptr);
iap10@3290 439 return -EINVAL;
iap10@3290 440 }
iap10@3290 441 if ((error = construct_vmcs_controls())) {
iap10@3290 442 printk("construct_vmcs: construct_vmcs_controls failed\n");
iap10@3290 443 return -EINVAL;
iap10@3290 444 }
iap10@3290 445 /* host selectors */
iap10@3290 446 if ((error = construct_vmcs_host(&host_env))) {
iap10@3290 447 printk("construct_vmcs: construct_vmcs_host failed\n");
iap10@3290 448 return -EINVAL;
iap10@3290 449 }
iap10@3290 450 /* guest selectors */
kaf24@4683 451 if ((error = construct_init_vmcs_guest(regs, ctxt, &host_env))) {
iap10@3290 452 printk("construct_vmcs: construct_vmcs_guest failed\n");
iap10@3290 453 return -EINVAL;
iap10@3290 454 }
iap10@3290 455
iap10@3290 456 if ((error |= __vmwrite(EXCEPTION_BITMAP,
iap10@3290 457 MONITOR_DEFAULT_EXCEPTION_BITMAP))) {
iap10@3290 458 printk("construct_vmcs: setting Exception bitmap failed\n");
iap10@3290 459 return -EINVAL;
iap10@3290 460 }
iap10@3290 461
iap10@3290 462 return 0;
iap10@3290 463 }
iap10@3290 464
iap10@3290 465 int load_vmcs(struct arch_vmx_struct *arch_vmx, u64 phys_ptr)
iap10@3290 466 {
iap10@3290 467 int error;
iap10@3290 468
iap10@3290 469 if ((error = __vmptrld(phys_ptr))) {
iap10@3290 470 clear_bit(ARCH_VMX_VMCS_LOADED, &arch_vmx->flags);
iap10@3290 471 return error;
iap10@3290 472 }
iap10@3290 473 set_bit(ARCH_VMX_VMCS_LOADED, &arch_vmx->flags);
iap10@3290 474 return 0;
iap10@3290 475 }
iap10@3290 476
iap10@3290 477 int store_vmcs(struct arch_vmx_struct *arch_vmx, u64 phys_ptr)
iap10@3290 478 {
iap10@3290 479 /* take the current VMCS */
iap10@3290 480 __vmptrst(phys_ptr);
iap10@3290 481 clear_bit(ARCH_VMX_VMCS_LOADED, &arch_vmx->flags);
iap10@3290 482 return 0;
iap10@3290 483 }
iap10@3290 484
iap10@3290 485 void vm_launch_fail(unsigned long eflags)
iap10@3290 486 {
arun@5382 487 __vmx_bug(guest_cpu_user_regs());
iap10@3290 488 }
iap10@3290 489
iap10@3290 490 void vm_resume_fail(unsigned long eflags)
iap10@3290 491 {
arun@5382 492 __vmx_bug(guest_cpu_user_regs());
iap10@3290 493 }
iap10@3290 494
mafetter@3717 495 #endif /* CONFIG_VMX */
kaf24@3914 496
kaf24@3914 497 /*
kaf24@3914 498 * Local variables:
kaf24@3914 499 * mode: C
kaf24@3914 500 * c-set-style: "BSD"
kaf24@3914 501 * c-basic-offset: 4
kaf24@3914 502 * tab-width: 4
kaf24@3914 503 * indent-tabs-mode: nil
kaf24@3988 504 * End:
kaf24@3914 505 */