| /* |
| * x86 misc 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/ioport.h" |
| #include "helper.h" |
| |
| #if !defined(CONFIG_USER_ONLY) |
| #include "exec/softmmu_exec.h" |
| #endif /* !defined(CONFIG_USER_ONLY) */ |
| |
| /* check if Port I/O is allowed in TSS */ |
| static inline void check_io(CPUX86State *env, int addr, int size) |
| { |
| int io_offset, val, mask; |
| |
| /* TSS must be a valid 32 bit one */ |
| if (!(env->tr.flags & DESC_P_MASK) || |
| ((env->tr.flags >> DESC_TYPE_SHIFT) & 0xf) != 9 || |
| env->tr.limit < 103) { |
| goto fail; |
| } |
| io_offset = cpu_lduw_kernel(env, env->tr.base + 0x66); |
| io_offset += (addr >> 3); |
| /* Note: the check needs two bytes */ |
| if ((io_offset + 1) > env->tr.limit) { |
| goto fail; |
| } |
| val = cpu_lduw_kernel(env, env->tr.base + io_offset); |
| val >>= (addr & 7); |
| mask = (1 << size) - 1; |
| /* all bits must be zero to allow the I/O */ |
| if ((val & mask) != 0) { |
| fail: |
| raise_exception_err(env, EXCP0D_GPF, 0); |
| } |
| } |
| |
| void helper_check_iob(CPUX86State *env, uint32_t t0) |
| { |
| check_io(env, t0, 1); |
| } |
| |
| void helper_check_iow(CPUX86State *env, uint32_t t0) |
| { |
| check_io(env, t0, 2); |
| } |
| |
| void helper_check_iol(CPUX86State *env, uint32_t t0) |
| { |
| check_io(env, t0, 4); |
| } |
| |
| void helper_outb(uint32_t port, uint32_t data) |
| { |
| cpu_outb(port, data & 0xff); |
| } |
| |
| target_ulong helper_inb(uint32_t port) |
| { |
| return cpu_inb(port); |
| } |
| |
| void helper_outw(uint32_t port, uint32_t data) |
| { |
| cpu_outw(port, data & 0xffff); |
| } |
| |
| target_ulong helper_inw(uint32_t port) |
| { |
| return cpu_inw(port); |
| } |
| |
| void helper_outl(uint32_t port, uint32_t data) |
| { |
| cpu_outl(port, data); |
| } |
| |
| target_ulong helper_inl(uint32_t port) |
| { |
| return cpu_inl(port); |
| } |
| |
| void helper_into(CPUX86State *env, int next_eip_addend) |
| { |
| int eflags; |
| |
| eflags = cpu_cc_compute_all(env, CC_OP); |
| if (eflags & CC_O) { |
| raise_interrupt(env, EXCP04_INTO, 1, 0, next_eip_addend); |
| } |
| } |
| |
| void helper_single_step(CPUX86State *env) |
| { |
| #ifndef CONFIG_USER_ONLY |
| check_hw_breakpoints(env, true); |
| env->dr[6] |= DR6_BS; |
| #endif |
| raise_exception(env, EXCP01_DB); |
| } |
| |
| void helper_cpuid(CPUX86State *env) |
| { |
| uint32_t eax, ebx, ecx, edx; |
| |
| cpu_svm_check_intercept_param(env, SVM_EXIT_CPUID, 0); |
| |
| cpu_x86_cpuid(env, (uint32_t)env->regs[R_EAX], (uint32_t)env->regs[R_ECX], |
| &eax, &ebx, &ecx, &edx); |
| env->regs[R_EAX] = eax; |
| env->regs[R_EBX] = ebx; |
| env->regs[R_ECX] = ecx; |
| env->regs[R_EDX] = edx; |
| } |
| |
| #if defined(CONFIG_USER_ONLY) |
| target_ulong helper_read_crN(CPUX86State *env, int reg) |
| { |
| return 0; |
| } |
| |
| void helper_write_crN(CPUX86State *env, int reg, target_ulong t0) |
| { |
| } |
| |
| void helper_movl_drN_T0(CPUX86State *env, int reg, target_ulong t0) |
| { |
| } |
| #else |
| target_ulong helper_read_crN(CPUX86State *env, int reg) |
| { |
| target_ulong val; |
| |
| cpu_svm_check_intercept_param(env, SVM_EXIT_READ_CR0 + reg, 0); |
| switch (reg) { |
| default: |
| val = env->cr[reg]; |
| break; |
| case 8: |
| if (!(env->hflags2 & HF2_VINTR_MASK)) { |
| val = cpu_get_apic_tpr(x86_env_get_cpu(env)->apic_state); |
| } else { |
| val = env->v_tpr; |
| } |
| break; |
| } |
| return val; |
| } |
| |
| void helper_write_crN(CPUX86State *env, int reg, target_ulong t0) |
| { |
| cpu_svm_check_intercept_param(env, SVM_EXIT_WRITE_CR0 + reg, 0); |
| switch (reg) { |
| case 0: |
| cpu_x86_update_cr0(env, t0); |
| break; |
| case 3: |
| cpu_x86_update_cr3(env, t0); |
| break; |
| case 4: |
| cpu_x86_update_cr4(env, t0); |
| break; |
| case 8: |
| if (!(env->hflags2 & HF2_VINTR_MASK)) { |
| cpu_set_apic_tpr(x86_env_get_cpu(env)->apic_state, t0); |
| } |
| env->v_tpr = t0 & 0x0f; |
| break; |
| default: |
| env->cr[reg] = t0; |
| break; |
| } |
| } |
| |
| void helper_movl_drN_T0(CPUX86State *env, int reg, target_ulong t0) |
| { |
| int i; |
| |
| if (reg < 4) { |
| hw_breakpoint_remove(env, reg); |
| env->dr[reg] = t0; |
| hw_breakpoint_insert(env, reg); |
| } else if (reg == 7) { |
| for (i = 0; i < DR7_MAX_BP; i++) { |
| hw_breakpoint_remove(env, i); |
| } |
| env->dr[7] = t0; |
| for (i = 0; i < DR7_MAX_BP; i++) { |
| hw_breakpoint_insert(env, i); |
| } |
| } else { |
| env->dr[reg] = t0; |
| } |
| } |
| #endif |
| |
| void helper_lmsw(CPUX86State *env, target_ulong t0) |
| { |
| /* only 4 lower bits of CR0 are modified. PE cannot be set to zero |
| if already set to one. */ |
| t0 = (env->cr[0] & ~0xe) | (t0 & 0xf); |
| helper_write_crN(env, 0, t0); |
| } |
| |
| void helper_invlpg(CPUX86State *env, target_ulong addr) |
| { |
| cpu_svm_check_intercept_param(env, SVM_EXIT_INVLPG, 0); |
| tlb_flush_page(env, addr); |
| } |
| |
| void helper_rdtsc(CPUX86State *env) |
| { |
| uint64_t val; |
| |
| if ((env->cr[4] & CR4_TSD_MASK) && ((env->hflags & HF_CPL_MASK) != 0)) { |
| raise_exception(env, EXCP0D_GPF); |
| } |
| cpu_svm_check_intercept_param(env, SVM_EXIT_RDTSC, 0); |
| |
| val = cpu_get_tsc(env) + env->tsc_offset; |
| env->regs[R_EAX] = (uint32_t)(val); |
| env->regs[R_EDX] = (uint32_t)(val >> 32); |
| } |
| |
| void helper_rdtscp(CPUX86State *env) |
| { |
| helper_rdtsc(env); |
| env->regs[R_ECX] = (uint32_t)(env->tsc_aux); |
| } |
| |
| void helper_rdpmc(CPUX86State *env) |
| { |
| if ((env->cr[4] & CR4_PCE_MASK) && ((env->hflags & HF_CPL_MASK) != 0)) { |
| raise_exception(env, EXCP0D_GPF); |
| } |
| cpu_svm_check_intercept_param(env, SVM_EXIT_RDPMC, 0); |
| |
| /* currently unimplemented */ |
| qemu_log_mask(LOG_UNIMP, "x86: unimplemented rdpmc\n"); |
| raise_exception_err(env, EXCP06_ILLOP, 0); |
| } |
| |
| #if defined(CONFIG_USER_ONLY) |
| void helper_wrmsr(CPUX86State *env) |
| { |
| } |
| |
| void helper_rdmsr(CPUX86State *env) |
| { |
| } |
| #else |
| void helper_wrmsr(CPUX86State *env) |
| { |
| uint64_t val; |
| |
| cpu_svm_check_intercept_param(env, SVM_EXIT_MSR, 1); |
| |
| val = ((uint32_t)env->regs[R_EAX]) | |
| ((uint64_t)((uint32_t)env->regs[R_EDX]) << 32); |
| |
| switch ((uint32_t)env->regs[R_ECX]) { |
| case MSR_IA32_SYSENTER_CS: |
| env->sysenter_cs = val & 0xffff; |
| break; |
| case MSR_IA32_SYSENTER_ESP: |
| env->sysenter_esp = val; |
| break; |
| case MSR_IA32_SYSENTER_EIP: |
| env->sysenter_eip = val; |
| break; |
| case MSR_IA32_APICBASE: |
| cpu_set_apic_base(x86_env_get_cpu(env)->apic_state, val); |
| break; |
| case MSR_EFER: |
| { |
| uint64_t update_mask; |
| |
| update_mask = 0; |
| if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_SYSCALL) { |
| update_mask |= MSR_EFER_SCE; |
| } |
| if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM) { |
| update_mask |= MSR_EFER_LME; |
| } |
| if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_FFXSR) { |
| update_mask |= MSR_EFER_FFXSR; |
| } |
| if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_NX) { |
| update_mask |= MSR_EFER_NXE; |
| } |
| if (env->features[FEAT_8000_0001_ECX] & CPUID_EXT3_SVM) { |
| update_mask |= MSR_EFER_SVME; |
| } |
| if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_FFXSR) { |
| update_mask |= MSR_EFER_FFXSR; |
| } |
| cpu_load_efer(env, (env->efer & ~update_mask) | |
| (val & update_mask)); |
| } |
| break; |
| case MSR_STAR: |
| env->star = val; |
| break; |
| case MSR_PAT: |
| env->pat = val; |
| break; |
| case MSR_VM_HSAVE_PA: |
| env->vm_hsave = val; |
| break; |
| #ifdef TARGET_X86_64 |
| case MSR_LSTAR: |
| env->lstar = val; |
| break; |
| case MSR_CSTAR: |
| env->cstar = val; |
| break; |
| case MSR_FMASK: |
| env->fmask = val; |
| break; |
| case MSR_FSBASE: |
| env->segs[R_FS].base = val; |
| break; |
| case MSR_GSBASE: |
| env->segs[R_GS].base = val; |
| break; |
| case MSR_KERNELGSBASE: |
| env->kernelgsbase = val; |
| break; |
| #endif |
| case MSR_MTRRphysBase(0): |
| case MSR_MTRRphysBase(1): |
| case MSR_MTRRphysBase(2): |
| case MSR_MTRRphysBase(3): |
| case MSR_MTRRphysBase(4): |
| case MSR_MTRRphysBase(5): |
| case MSR_MTRRphysBase(6): |
| case MSR_MTRRphysBase(7): |
| env->mtrr_var[((uint32_t)env->regs[R_ECX] - |
| MSR_MTRRphysBase(0)) / 2].base = val; |
| break; |
| case MSR_MTRRphysMask(0): |
| case MSR_MTRRphysMask(1): |
| case MSR_MTRRphysMask(2): |
| case MSR_MTRRphysMask(3): |
| case MSR_MTRRphysMask(4): |
| case MSR_MTRRphysMask(5): |
| case MSR_MTRRphysMask(6): |
| case MSR_MTRRphysMask(7): |
| env->mtrr_var[((uint32_t)env->regs[R_ECX] - |
| MSR_MTRRphysMask(0)) / 2].mask = val; |
| break; |
| case MSR_MTRRfix64K_00000: |
| env->mtrr_fixed[(uint32_t)env->regs[R_ECX] - |
| MSR_MTRRfix64K_00000] = val; |
| break; |
| case MSR_MTRRfix16K_80000: |
| case MSR_MTRRfix16K_A0000: |
| env->mtrr_fixed[(uint32_t)env->regs[R_ECX] - |
| MSR_MTRRfix16K_80000 + 1] = val; |
| break; |
| case MSR_MTRRfix4K_C0000: |
| case MSR_MTRRfix4K_C8000: |
| case MSR_MTRRfix4K_D0000: |
| case MSR_MTRRfix4K_D8000: |
| case MSR_MTRRfix4K_E0000: |
| case MSR_MTRRfix4K_E8000: |
| case MSR_MTRRfix4K_F0000: |
| case MSR_MTRRfix4K_F8000: |
| env->mtrr_fixed[(uint32_t)env->regs[R_ECX] - |
| MSR_MTRRfix4K_C0000 + 3] = val; |
| break; |
| case MSR_MTRRdefType: |
| env->mtrr_deftype = val; |
| break; |
| case MSR_MCG_STATUS: |
| env->mcg_status = val; |
| break; |
| case MSR_MCG_CTL: |
| if ((env->mcg_cap & MCG_CTL_P) |
| && (val == 0 || val == ~(uint64_t)0)) { |
| env->mcg_ctl = val; |
| } |
| break; |
| case MSR_TSC_AUX: |
| env->tsc_aux = val; |
| break; |
| case MSR_IA32_MISC_ENABLE: |
| env->msr_ia32_misc_enable = val; |
| break; |
| default: |
| if ((uint32_t)env->regs[R_ECX] >= MSR_MC0_CTL |
| && (uint32_t)env->regs[R_ECX] < MSR_MC0_CTL + |
| (4 * env->mcg_cap & 0xff)) { |
| uint32_t offset = (uint32_t)env->regs[R_ECX] - MSR_MC0_CTL; |
| if ((offset & 0x3) != 0 |
| || (val == 0 || val == ~(uint64_t)0)) { |
| env->mce_banks[offset] = val; |
| } |
| break; |
| } |
| /* XXX: exception? */ |
| break; |
| } |
| } |
| |
| void helper_rdmsr(CPUX86State *env) |
| { |
| uint64_t val; |
| |
| cpu_svm_check_intercept_param(env, SVM_EXIT_MSR, 0); |
| |
| switch ((uint32_t)env->regs[R_ECX]) { |
| case MSR_IA32_SYSENTER_CS: |
| val = env->sysenter_cs; |
| break; |
| case MSR_IA32_SYSENTER_ESP: |
| val = env->sysenter_esp; |
| break; |
| case MSR_IA32_SYSENTER_EIP: |
| val = env->sysenter_eip; |
| break; |
| case MSR_IA32_APICBASE: |
| val = cpu_get_apic_base(x86_env_get_cpu(env)->apic_state); |
| break; |
| case MSR_EFER: |
| val = env->efer; |
| break; |
| case MSR_STAR: |
| val = env->star; |
| break; |
| case MSR_PAT: |
| val = env->pat; |
| break; |
| case MSR_VM_HSAVE_PA: |
| val = env->vm_hsave; |
| break; |
| case MSR_IA32_PERF_STATUS: |
| /* tsc_increment_by_tick */ |
| val = 1000ULL; |
| /* CPU multiplier */ |
| val |= (((uint64_t)4ULL) << 40); |
| break; |
| #ifdef TARGET_X86_64 |
| case MSR_LSTAR: |
| val = env->lstar; |
| break; |
| case MSR_CSTAR: |
| val = env->cstar; |
| break; |
| case MSR_FMASK: |
| val = env->fmask; |
| break; |
| case MSR_FSBASE: |
| val = env->segs[R_FS].base; |
| break; |
| case MSR_GSBASE: |
| val = env->segs[R_GS].base; |
| break; |
| case MSR_KERNELGSBASE: |
| val = env->kernelgsbase; |
| break; |
| case MSR_TSC_AUX: |
| val = env->tsc_aux; |
| break; |
| #endif |
| case MSR_MTRRphysBase(0): |
| case MSR_MTRRphysBase(1): |
| case MSR_MTRRphysBase(2): |
| case MSR_MTRRphysBase(3): |
| case MSR_MTRRphysBase(4): |
| case MSR_MTRRphysBase(5): |
| case MSR_MTRRphysBase(6): |
| case MSR_MTRRphysBase(7): |
| val = env->mtrr_var[((uint32_t)env->regs[R_ECX] - |
| MSR_MTRRphysBase(0)) / 2].base; |
| break; |
| case MSR_MTRRphysMask(0): |
| case MSR_MTRRphysMask(1): |
| case MSR_MTRRphysMask(2): |
| case MSR_MTRRphysMask(3): |
| case MSR_MTRRphysMask(4): |
| case MSR_MTRRphysMask(5): |
| case MSR_MTRRphysMask(6): |
| case MSR_MTRRphysMask(7): |
| val = env->mtrr_var[((uint32_t)env->regs[R_ECX] - |
| MSR_MTRRphysMask(0)) / 2].mask; |
| break; |
| case MSR_MTRRfix64K_00000: |
| val = env->mtrr_fixed[0]; |
| break; |
| case MSR_MTRRfix16K_80000: |
| case MSR_MTRRfix16K_A0000: |
| val = env->mtrr_fixed[(uint32_t)env->regs[R_ECX] - |
| MSR_MTRRfix16K_80000 + 1]; |
| break; |
| case MSR_MTRRfix4K_C0000: |
| case MSR_MTRRfix4K_C8000: |
| case MSR_MTRRfix4K_D0000: |
| case MSR_MTRRfix4K_D8000: |
| case MSR_MTRRfix4K_E0000: |
| case MSR_MTRRfix4K_E8000: |
| case MSR_MTRRfix4K_F0000: |
| case MSR_MTRRfix4K_F8000: |
| val = env->mtrr_fixed[(uint32_t)env->regs[R_ECX] - |
| MSR_MTRRfix4K_C0000 + 3]; |
| break; |
| case MSR_MTRRdefType: |
| val = env->mtrr_deftype; |
| break; |
| case MSR_MTRRcap: |
| if (env->features[FEAT_1_EDX] & CPUID_MTRR) { |
| val = MSR_MTRRcap_VCNT | MSR_MTRRcap_FIXRANGE_SUPPORT | |
| MSR_MTRRcap_WC_SUPPORTED; |
| } else { |
| /* XXX: exception? */ |
| val = 0; |
| } |
| break; |
| case MSR_MCG_CAP: |
| val = env->mcg_cap; |
| break; |
| case MSR_MCG_CTL: |
| if (env->mcg_cap & MCG_CTL_P) { |
| val = env->mcg_ctl; |
| } else { |
| val = 0; |
| } |
| break; |
| case MSR_MCG_STATUS: |
| val = env->mcg_status; |
| break; |
| case MSR_IA32_MISC_ENABLE: |
| val = env->msr_ia32_misc_enable; |
| break; |
| default: |
| if ((uint32_t)env->regs[R_ECX] >= MSR_MC0_CTL |
| && (uint32_t)env->regs[R_ECX] < MSR_MC0_CTL + |
| (4 * env->mcg_cap & 0xff)) { |
| uint32_t offset = (uint32_t)env->regs[R_ECX] - MSR_MC0_CTL; |
| val = env->mce_banks[offset]; |
| break; |
| } |
| /* XXX: exception? */ |
| val = 0; |
| break; |
| } |
| env->regs[R_EAX] = (uint32_t)(val); |
| env->regs[R_EDX] = (uint32_t)(val >> 32); |
| } |
| #endif |
| |
| static void do_pause(X86CPU *cpu) |
| { |
| CPUX86State *env = &cpu->env; |
| |
| /* Just let another CPU run. */ |
| env->exception_index = EXCP_INTERRUPT; |
| cpu_loop_exit(env); |
| } |
| |
| static void do_hlt(X86CPU *cpu) |
| { |
| CPUState *cs = CPU(cpu); |
| CPUX86State *env = &cpu->env; |
| |
| env->hflags &= ~HF_INHIBIT_IRQ_MASK; /* needed if sti is just before */ |
| cs->halted = 1; |
| env->exception_index = EXCP_HLT; |
| cpu_loop_exit(env); |
| } |
| |
| void helper_hlt(CPUX86State *env, int next_eip_addend) |
| { |
| X86CPU *cpu = x86_env_get_cpu(env); |
| |
| cpu_svm_check_intercept_param(env, SVM_EXIT_HLT, 0); |
| env->eip += next_eip_addend; |
| |
| do_hlt(cpu); |
| } |
| |
| void helper_monitor(CPUX86State *env, target_ulong ptr) |
| { |
| if ((uint32_t)env->regs[R_ECX] != 0) { |
| raise_exception(env, EXCP0D_GPF); |
| } |
| /* XXX: store address? */ |
| cpu_svm_check_intercept_param(env, SVM_EXIT_MONITOR, 0); |
| } |
| |
| void helper_mwait(CPUX86State *env, int next_eip_addend) |
| { |
| CPUState *cs; |
| X86CPU *cpu; |
| |
| if ((uint32_t)env->regs[R_ECX] != 0) { |
| raise_exception(env, EXCP0D_GPF); |
| } |
| cpu_svm_check_intercept_param(env, SVM_EXIT_MWAIT, 0); |
| env->eip += next_eip_addend; |
| |
| cpu = x86_env_get_cpu(env); |
| cs = CPU(cpu); |
| /* XXX: not complete but not completely erroneous */ |
| if (cs->cpu_index != 0 || CPU_NEXT(cs) != NULL) { |
| do_pause(cpu); |
| } else { |
| do_hlt(cpu); |
| } |
| } |
| |
| void helper_pause(CPUX86State *env, int next_eip_addend) |
| { |
| X86CPU *cpu = x86_env_get_cpu(env); |
| |
| cpu_svm_check_intercept_param(env, SVM_EXIT_PAUSE, 0); |
| env->eip += next_eip_addend; |
| |
| do_pause(cpu); |
| } |
| |
| void helper_debug(CPUX86State *env) |
| { |
| env->exception_index = EXCP_DEBUG; |
| cpu_loop_exit(env); |
| } |
