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qemu/target-i386/smm_helper.c
Peter Maydell 9f0355b590 Merge remote-tracking branch 'remotes/kvm/uq/master' into staging 
* remotes/kvm/uq/master:
  kvm: Fix eax for cpuid leaf 0x40000000
  kvmclock: Ensure proper env->tsc value for kvmclock_current_nsec calculation
  kvm: Enable -cpu option to hide KVM
  kvm: Ensure negative return value on kvm_init() error handling path
  target-i386: set CC_OP to CC_OP_EFLAGS in cpu_load_eflags
  target-i386: get CPL from SS.DPL
  target-i386: rework CPL checks during task switch, preparing for next patch
  target-i386: fix segment flags for SMM and VM86 mode
  target-i386: Fix vm86 mode regression introduced in fd460606fd.
  kvm_stat: allow choosing between tracepoints and old stats
  kvmclock: Ensure time in migration never goes backward

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-06-05 19:16:28 +01:00

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/*
* x86 SMM helpers
*
* Copyright (c) 2003 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "cpu.h"
#include "exec/helper-proto.h"
/* SMM support */
#if defined(CONFIG_USER_ONLY)
void do_smm_enter(X86CPU *cpu)
{
}
void helper_rsm(CPUX86State *env)
{
}
#else
#ifdef TARGET_X86_64
#define SMM_REVISION_ID 0x00020064
#else
#define SMM_REVISION_ID 0x00020000
#endif
void do_smm_enter(X86CPU *cpu)
{
CPUX86State *env = &cpu->env;
CPUState *cs = CPU(cpu);
target_ulong sm_state;
SegmentCache *dt;
int i, offset;
qemu_log_mask(CPU_LOG_INT, "SMM: enter\n");
log_cpu_state_mask(CPU_LOG_INT, CPU(cpu), CPU_DUMP_CCOP);
env->hflags |= HF_SMM_MASK;
cpu_smm_update(env);
sm_state = env->smbase + 0x8000;
#ifdef TARGET_X86_64
for (i = 0; i < 6; i++) {
dt = &env->segs[i];
offset = 0x7e00 + i * 16;
stw_phys(cs->as, sm_state + offset, dt->selector);
stw_phys(cs->as, sm_state + offset + 2, (dt->flags >> 8) & 0xf0ff);
stl_phys(cs->as, sm_state + offset + 4, dt->limit);
stq_phys(cs->as, sm_state + offset + 8, dt->base);
}
stq_phys(cs->as, sm_state + 0x7e68, env->gdt.base);
stl_phys(cs->as, sm_state + 0x7e64, env->gdt.limit);
stw_phys(cs->as, sm_state + 0x7e70, env->ldt.selector);
stq_phys(cs->as, sm_state + 0x7e78, env->ldt.base);
stl_phys(cs->as, sm_state + 0x7e74, env->ldt.limit);
stw_phys(cs->as, sm_state + 0x7e72, (env->ldt.flags >> 8) & 0xf0ff);
stq_phys(cs->as, sm_state + 0x7e88, env->idt.base);
stl_phys(cs->as, sm_state + 0x7e84, env->idt.limit);
stw_phys(cs->as, sm_state + 0x7e90, env->tr.selector);
stq_phys(cs->as, sm_state + 0x7e98, env->tr.base);
stl_phys(cs->as, sm_state + 0x7e94, env->tr.limit);
stw_phys(cs->as, sm_state + 0x7e92, (env->tr.flags >> 8) & 0xf0ff);
stq_phys(cs->as, sm_state + 0x7ed0, env->efer);
stq_phys(cs->as, sm_state + 0x7ff8, env->regs[R_EAX]);
stq_phys(cs->as, sm_state + 0x7ff0, env->regs[R_ECX]);
stq_phys(cs->as, sm_state + 0x7fe8, env->regs[R_EDX]);
stq_phys(cs->as, sm_state + 0x7fe0, env->regs[R_EBX]);
stq_phys(cs->as, sm_state + 0x7fd8, env->regs[R_ESP]);
stq_phys(cs->as, sm_state + 0x7fd0, env->regs[R_EBP]);
stq_phys(cs->as, sm_state + 0x7fc8, env->regs[R_ESI]);
stq_phys(cs->as, sm_state + 0x7fc0, env->regs[R_EDI]);
for (i = 8; i < 16; i++) {
stq_phys(cs->as, sm_state + 0x7ff8 - i * 8, env->regs[i]);
}
stq_phys(cs->as, sm_state + 0x7f78, env->eip);
stl_phys(cs->as, sm_state + 0x7f70, cpu_compute_eflags(env));
stl_phys(cs->as, sm_state + 0x7f68, env->dr[6]);
stl_phys(cs->as, sm_state + 0x7f60, env->dr[7]);
stl_phys(cs->as, sm_state + 0x7f48, env->cr[4]);
stl_phys(cs->as, sm_state + 0x7f50, env->cr[3]);
stl_phys(cs->as, sm_state + 0x7f58, env->cr[0]);
stl_phys(cs->as, sm_state + 0x7efc, SMM_REVISION_ID);
stl_phys(cs->as, sm_state + 0x7f00, env->smbase);
#else
stl_phys(cs->as, sm_state + 0x7ffc, env->cr[0]);
stl_phys(cs->as, sm_state + 0x7ff8, env->cr[3]);
stl_phys(cs->as, sm_state + 0x7ff4, cpu_compute_eflags(env));
stl_phys(cs->as, sm_state + 0x7ff0, env->eip);
stl_phys(cs->as, sm_state + 0x7fec, env->regs[R_EDI]);
stl_phys(cs->as, sm_state + 0x7fe8, env->regs[R_ESI]);
stl_phys(cs->as, sm_state + 0x7fe4, env->regs[R_EBP]);
stl_phys(cs->as, sm_state + 0x7fe0, env->regs[R_ESP]);
stl_phys(cs->as, sm_state + 0x7fdc, env->regs[R_EBX]);
stl_phys(cs->as, sm_state + 0x7fd8, env->regs[R_EDX]);
stl_phys(cs->as, sm_state + 0x7fd4, env->regs[R_ECX]);
stl_phys(cs->as, sm_state + 0x7fd0, env->regs[R_EAX]);
stl_phys(cs->as, sm_state + 0x7fcc, env->dr[6]);
stl_phys(cs->as, sm_state + 0x7fc8, env->dr[7]);
stl_phys(cs->as, sm_state + 0x7fc4, env->tr.selector);
stl_phys(cs->as, sm_state + 0x7f64, env->tr.base);
stl_phys(cs->as, sm_state + 0x7f60, env->tr.limit);
stl_phys(cs->as, sm_state + 0x7f5c, (env->tr.flags >> 8) & 0xf0ff);
stl_phys(cs->as, sm_state + 0x7fc0, env->ldt.selector);
stl_phys(cs->as, sm_state + 0x7f80, env->ldt.base);
stl_phys(cs->as, sm_state + 0x7f7c, env->ldt.limit);
stl_phys(cs->as, sm_state + 0x7f78, (env->ldt.flags >> 8) & 0xf0ff);
stl_phys(cs->as, sm_state + 0x7f74, env->gdt.base);
stl_phys(cs->as, sm_state + 0x7f70, env->gdt.limit);
stl_phys(cs->as, sm_state + 0x7f58, env->idt.base);
stl_phys(cs->as, sm_state + 0x7f54, env->idt.limit);
for (i = 0; i < 6; i++) {
dt = &env->segs[i];
if (i < 3) {
offset = 0x7f84 + i * 12;
} else {
offset = 0x7f2c + (i - 3) * 12;
}
stl_phys(cs->as, sm_state + 0x7fa8 + i * 4, dt->selector);
stl_phys(cs->as, sm_state + offset + 8, dt->base);
stl_phys(cs->as, sm_state + offset + 4, dt->limit);
stl_phys(cs->as, sm_state + offset, (dt->flags >> 8) & 0xf0ff);
}
stl_phys(cs->as, sm_state + 0x7f14, env->cr[4]);
stl_phys(cs->as, sm_state + 0x7efc, SMM_REVISION_ID);
stl_phys(cs->as, sm_state + 0x7ef8, env->smbase);
#endif
/* init SMM cpu state */
#ifdef TARGET_X86_64
cpu_load_efer(env, 0);
#endif
cpu_load_eflags(env, 0, ~(CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C |
DF_MASK));
env->eip = 0x00008000;
cpu_x86_update_cr0(env,
env->cr[0] & ~(CR0_PE_MASK | CR0_EM_MASK | CR0_TS_MASK |
CR0_PG_MASK));
cpu_x86_update_cr4(env, 0);
env->dr[7] = 0x00000400;
cpu_x86_load_seg_cache(env, R_CS, (env->smbase >> 4) & 0xffff, env->smbase,
0xffffffff,
DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
DESC_A_MASK);
cpu_x86_load_seg_cache(env, R_DS, 0, 0, 0xffffffff,
DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
DESC_A_MASK);
cpu_x86_load_seg_cache(env, R_ES, 0, 0, 0xffffffff,
DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
DESC_A_MASK);
cpu_x86_load_seg_cache(env, R_SS, 0, 0, 0xffffffff,
DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
DESC_A_MASK);
cpu_x86_load_seg_cache(env, R_FS, 0, 0, 0xffffffff,
DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
DESC_A_MASK);
cpu_x86_load_seg_cache(env, R_GS, 0, 0, 0xffffffff,
DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
DESC_A_MASK);
}
void helper_rsm(CPUX86State *env)
{
X86CPU *cpu = x86_env_get_cpu(env);
CPUState *cs = CPU(cpu);
target_ulong sm_state;
int i, offset;
uint32_t val;
sm_state = env->smbase + 0x8000;
#ifdef TARGET_X86_64
cpu_load_efer(env, ldq_phys(cs->as, sm_state + 0x7ed0));
env->gdt.base = ldq_phys(cs->as, sm_state + 0x7e68);
env->gdt.limit = ldl_phys(cs->as, sm_state + 0x7e64);
env->ldt.selector = lduw_phys(cs->as, sm_state + 0x7e70);
env->ldt.base = ldq_phys(cs->as, sm_state + 0x7e78);
env->ldt.limit = ldl_phys(cs->as, sm_state + 0x7e74);
env->ldt.flags = (lduw_phys(cs->as, sm_state + 0x7e72) & 0xf0ff) << 8;
env->idt.base = ldq_phys(cs->as, sm_state + 0x7e88);
env->idt.limit = ldl_phys(cs->as, sm_state + 0x7e84);
env->tr.selector = lduw_phys(cs->as, sm_state + 0x7e90);
env->tr.base = ldq_phys(cs->as, sm_state + 0x7e98);
env->tr.limit = ldl_phys(cs->as, sm_state + 0x7e94);
env->tr.flags = (lduw_phys(cs->as, sm_state + 0x7e92) & 0xf0ff) << 8;
env->regs[R_EAX] = ldq_phys(cs->as, sm_state + 0x7ff8);
env->regs[R_ECX] = ldq_phys(cs->as, sm_state + 0x7ff0);
env->regs[R_EDX] = ldq_phys(cs->as, sm_state + 0x7fe8);
env->regs[R_EBX] = ldq_phys(cs->as, sm_state + 0x7fe0);
env->regs[R_ESP] = ldq_phys(cs->as, sm_state + 0x7fd8);
env->regs[R_EBP] = ldq_phys(cs->as, sm_state + 0x7fd0);
env->regs[R_ESI] = ldq_phys(cs->as, sm_state + 0x7fc8);
env->regs[R_EDI] = ldq_phys(cs->as, sm_state + 0x7fc0);
for (i = 8; i < 16; i++) {
env->regs[i] = ldq_phys(cs->as, sm_state + 0x7ff8 - i * 8);
}
env->eip = ldq_phys(cs->as, sm_state + 0x7f78);
cpu_load_eflags(env, ldl_phys(cs->as, sm_state + 0x7f70),
~(CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C | DF_MASK));
env->dr[6] = ldl_phys(cs->as, sm_state + 0x7f68);
env->dr[7] = ldl_phys(cs->as, sm_state + 0x7f60);
cpu_x86_update_cr4(env, ldl_phys(cs->as, sm_state + 0x7f48));
cpu_x86_update_cr3(env, ldl_phys(cs->as, sm_state + 0x7f50));
cpu_x86_update_cr0(env, ldl_phys(cs->as, sm_state + 0x7f58));
for (i = 0; i < 6; i++) {
offset = 0x7e00 + i * 16;
cpu_x86_load_seg_cache(env, i,
lduw_phys(cs->as, sm_state + offset),
ldq_phys(cs->as, sm_state + offset + 8),
ldl_phys(cs->as, sm_state + offset + 4),
(lduw_phys(cs->as, sm_state + offset + 2) &
0xf0ff) << 8);
}
val = ldl_phys(cs->as, sm_state + 0x7efc); /* revision ID */
if (val & 0x20000) {
env->smbase = ldl_phys(cs->as, sm_state + 0x7f00) & ~0x7fff;
}
#else
cpu_x86_update_cr0(env, ldl_phys(cs->as, sm_state + 0x7ffc));
cpu_x86_update_cr3(env, ldl_phys(cs->as, sm_state + 0x7ff8));
cpu_load_eflags(env, ldl_phys(cs->as, sm_state + 0x7ff4),
~(CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C | DF_MASK));
env->eip = ldl_phys(cs->as, sm_state + 0x7ff0);
env->regs[R_EDI] = ldl_phys(cs->as, sm_state + 0x7fec);
env->regs[R_ESI] = ldl_phys(cs->as, sm_state + 0x7fe8);
env->regs[R_EBP] = ldl_phys(cs->as, sm_state + 0x7fe4);
env->regs[R_ESP] = ldl_phys(cs->as, sm_state + 0x7fe0);
env->regs[R_EBX] = ldl_phys(cs->as, sm_state + 0x7fdc);
env->regs[R_EDX] = ldl_phys(cs->as, sm_state + 0x7fd8);
env->regs[R_ECX] = ldl_phys(cs->as, sm_state + 0x7fd4);
env->regs[R_EAX] = ldl_phys(cs->as, sm_state + 0x7fd0);
env->dr[6] = ldl_phys(cs->as, sm_state + 0x7fcc);
env->dr[7] = ldl_phys(cs->as, sm_state + 0x7fc8);
env->tr.selector = ldl_phys(cs->as, sm_state + 0x7fc4) & 0xffff;
env->tr.base = ldl_phys(cs->as, sm_state + 0x7f64);
env->tr.limit = ldl_phys(cs->as, sm_state + 0x7f60);
env->tr.flags = (ldl_phys(cs->as, sm_state + 0x7f5c) & 0xf0ff) << 8;
env->ldt.selector = ldl_phys(cs->as, sm_state + 0x7fc0) & 0xffff;
env->ldt.base = ldl_phys(cs->as, sm_state + 0x7f80);
env->ldt.limit = ldl_phys(cs->as, sm_state + 0x7f7c);
env->ldt.flags = (ldl_phys(cs->as, sm_state + 0x7f78) & 0xf0ff) << 8;
env->gdt.base = ldl_phys(cs->as, sm_state + 0x7f74);
env->gdt.limit = ldl_phys(cs->as, sm_state + 0x7f70);
env->idt.base = ldl_phys(cs->as, sm_state + 0x7f58);
env->idt.limit = ldl_phys(cs->as, sm_state + 0x7f54);
for (i = 0; i < 6; i++) {
if (i < 3) {
offset = 0x7f84 + i * 12;
} else {
offset = 0x7f2c + (i - 3) * 12;
}
cpu_x86_load_seg_cache(env, i,
ldl_phys(cs->as,
sm_state + 0x7fa8 + i * 4) & 0xffff,
ldl_phys(cs->as, sm_state + offset + 8),
ldl_phys(cs->as, sm_state + offset + 4),
(ldl_phys(cs->as,
sm_state + offset) & 0xf0ff) << 8);
}
cpu_x86_update_cr4(env, ldl_phys(cs->as, sm_state + 0x7f14));
val = ldl_phys(cs->as, sm_state + 0x7efc); /* revision ID */
if (val & 0x20000) {
env->smbase = ldl_phys(cs->as, sm_state + 0x7ef8) & ~0x7fff;
}
#endif
env->hflags &= ~HF_SMM_MASK;
cpu_smm_update(env);
qemu_log_mask(CPU_LOG_INT, "SMM: after RSM\n");
log_cpu_state_mask(CPU_LOG_INT, CPU(cpu), CPU_DUMP_CCOP);
}
#endif /* !CONFIG_USER_ONLY */
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