root / target-i386 / misc_helper.c @ f7b2429f
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/*
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* x86 misc helpers
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "cpu.h" |
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#include "dyngen-exec.h" |
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#include "ioport.h" |
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#include "helper.h" |
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|
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#if !defined(CONFIG_USER_ONLY)
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#include "softmmu_exec.h" |
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#endif /* !defined(CONFIG_USER_ONLY) */ |
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|
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/* check if Port I/O is allowed in TSS */
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static inline void check_io(int addr, int size) |
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{
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int io_offset, val, mask;
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/* TSS must be a valid 32 bit one */
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if (!(env->tr.flags & DESC_P_MASK) ||
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((env->tr.flags >> DESC_TYPE_SHIFT) & 0xf) != 9 || |
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env->tr.limit < 103) {
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goto fail;
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} |
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io_offset = lduw_kernel(env->tr.base + 0x66);
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io_offset += (addr >> 3);
|
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/* Note: the check needs two bytes */
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if ((io_offset + 1) > env->tr.limit) { |
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goto fail;
|
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} |
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val = lduw_kernel(env->tr.base + io_offset); |
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val >>= (addr & 7);
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mask = (1 << size) - 1; |
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/* all bits must be zero to allow the I/O */
|
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if ((val & mask) != 0) { |
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fail:
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raise_exception_err(env, EXCP0D_GPF, 0);
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} |
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} |
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|
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void helper_check_iob(uint32_t t0)
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{
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check_io(t0, 1);
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} |
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|
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void helper_check_iow(uint32_t t0)
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{
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check_io(t0, 2);
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} |
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|
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void helper_check_iol(uint32_t t0)
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{
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check_io(t0, 4);
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} |
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|
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void helper_outb(uint32_t port, uint32_t data)
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{
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cpu_outb(port, data & 0xff);
|
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} |
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|
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target_ulong helper_inb(uint32_t port) |
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{
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return cpu_inb(port);
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} |
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|
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void helper_outw(uint32_t port, uint32_t data)
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{
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cpu_outw(port, data & 0xffff);
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} |
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|
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target_ulong helper_inw(uint32_t port) |
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{
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return cpu_inw(port);
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} |
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|
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void helper_outl(uint32_t port, uint32_t data)
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{
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cpu_outl(port, data); |
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} |
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|
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target_ulong helper_inl(uint32_t port) |
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{
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return cpu_inl(port);
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} |
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|
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void helper_into(int next_eip_addend) |
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{
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int eflags;
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|
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eflags = helper_cc_compute_all(CC_OP); |
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if (eflags & CC_O) {
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raise_interrupt(env, EXCP04_INTO, 1, 0, next_eip_addend); |
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} |
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} |
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void helper_single_step(void) |
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{
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#ifndef CONFIG_USER_ONLY
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check_hw_breakpoints(env, 1);
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env->dr[6] |= DR6_BS;
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#endif
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raise_exception(env, EXCP01_DB); |
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} |
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|
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void helper_cpuid(void) |
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{
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uint32_t eax, ebx, ecx, edx; |
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cpu_svm_check_intercept_param(env, SVM_EXIT_CPUID, 0);
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cpu_x86_cpuid(env, (uint32_t)EAX, (uint32_t)ECX, &eax, &ebx, &ecx, &edx); |
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EAX = eax; |
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EBX = ebx; |
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ECX = ecx; |
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EDX = edx; |
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} |
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#if defined(CONFIG_USER_ONLY)
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target_ulong helper_read_crN(int reg)
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{
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return 0; |
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} |
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|
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void helper_write_crN(int reg, target_ulong t0) |
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{
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} |
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|
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void helper_movl_drN_T0(int reg, target_ulong t0) |
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{
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} |
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#else
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target_ulong helper_read_crN(int reg)
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{
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target_ulong val; |
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cpu_svm_check_intercept_param(env, SVM_EXIT_READ_CR0 + reg, 0);
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switch (reg) {
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default:
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val = env->cr[reg]; |
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break;
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case 8: |
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if (!(env->hflags2 & HF2_VINTR_MASK)) {
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val = cpu_get_apic_tpr(env->apic_state); |
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} else {
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val = env->v_tpr; |
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} |
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break;
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} |
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return val;
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} |
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void helper_write_crN(int reg, target_ulong t0) |
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{
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cpu_svm_check_intercept_param(env, SVM_EXIT_WRITE_CR0 + reg, 0);
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switch (reg) {
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case 0: |
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cpu_x86_update_cr0(env, t0); |
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break;
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case 3: |
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cpu_x86_update_cr3(env, t0); |
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break;
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case 4: |
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cpu_x86_update_cr4(env, t0); |
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break;
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case 8: |
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if (!(env->hflags2 & HF2_VINTR_MASK)) {
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cpu_set_apic_tpr(env->apic_state, t0); |
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} |
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env->v_tpr = t0 & 0x0f;
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break;
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default:
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env->cr[reg] = t0; |
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break;
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} |
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} |
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|
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void helper_movl_drN_T0(int reg, target_ulong t0) |
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{
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int i;
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|
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if (reg < 4) { |
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hw_breakpoint_remove(env, reg); |
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env->dr[reg] = t0; |
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hw_breakpoint_insert(env, reg); |
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} else if (reg == 7) { |
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for (i = 0; i < 4; i++) { |
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hw_breakpoint_remove(env, i); |
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} |
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env->dr[7] = t0;
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for (i = 0; i < 4; i++) { |
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hw_breakpoint_insert(env, i); |
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} |
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} else {
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env->dr[reg] = t0; |
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} |
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} |
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#endif
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|
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void helper_lmsw(target_ulong t0)
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{
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/* only 4 lower bits of CR0 are modified. PE cannot be set to zero
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if already set to one. */
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t0 = (env->cr[0] & ~0xe) | (t0 & 0xf); |
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helper_write_crN(0, t0);
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} |
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|
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void helper_invlpg(target_ulong addr)
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{
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cpu_svm_check_intercept_param(env, SVM_EXIT_INVLPG, 0);
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tlb_flush_page(env, addr); |
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} |
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|
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void helper_rdtsc(void) |
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{
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uint64_t val; |
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|
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if ((env->cr[4] & CR4_TSD_MASK) && ((env->hflags & HF_CPL_MASK) != 0)) { |
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raise_exception(env, EXCP0D_GPF); |
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} |
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cpu_svm_check_intercept_param(env, SVM_EXIT_RDTSC, 0);
|
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|
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val = cpu_get_tsc(env) + env->tsc_offset; |
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EAX = (uint32_t)(val); |
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EDX = (uint32_t)(val >> 32);
|
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} |
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|
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void helper_rdtscp(void) |
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{
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helper_rdtsc(); |
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ECX = (uint32_t)(env->tsc_aux); |
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} |
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|
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void helper_rdpmc(void) |
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{
|
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if ((env->cr[4] & CR4_PCE_MASK) && ((env->hflags & HF_CPL_MASK) != 0)) { |
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raise_exception(env, EXCP0D_GPF); |
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} |
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cpu_svm_check_intercept_param(env, SVM_EXIT_RDPMC, 0);
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|
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/* currently unimplemented */
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qemu_log_mask(LOG_UNIMP, "x86: unimplemented rdpmc\n");
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raise_exception_err(env, EXCP06_ILLOP, 0);
|
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} |
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|
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#if defined(CONFIG_USER_ONLY)
|
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void helper_wrmsr(void) |
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{
|
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} |
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|
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void helper_rdmsr(void) |
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{
|
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} |
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#else
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void helper_wrmsr(void) |
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{
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uint64_t val; |
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|
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cpu_svm_check_intercept_param(env, SVM_EXIT_MSR, 1);
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|
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val = ((uint32_t)EAX) | ((uint64_t)((uint32_t)EDX) << 32);
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|
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switch ((uint32_t)ECX) {
|
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case MSR_IA32_SYSENTER_CS:
|
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env->sysenter_cs = val & 0xffff;
|
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break;
|
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case MSR_IA32_SYSENTER_ESP:
|
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env->sysenter_esp = val; |
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break;
|
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case MSR_IA32_SYSENTER_EIP:
|
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env->sysenter_eip = val; |
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break;
|
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case MSR_IA32_APICBASE:
|
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cpu_set_apic_base(env->apic_state, val); |
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break;
|
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case MSR_EFER:
|
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{
|
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uint64_t update_mask; |
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|
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update_mask = 0;
|
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if (env->cpuid_ext2_features & CPUID_EXT2_SYSCALL) {
|
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update_mask |= MSR_EFER_SCE; |
| 297 |
} |
| 298 |
if (env->cpuid_ext2_features & CPUID_EXT2_LM) {
|
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update_mask |= MSR_EFER_LME; |
| 300 |
} |
| 301 |
if (env->cpuid_ext2_features & CPUID_EXT2_FFXSR) {
|
| 302 |
update_mask |= MSR_EFER_FFXSR; |
| 303 |
} |
| 304 |
if (env->cpuid_ext2_features & CPUID_EXT2_NX) {
|
| 305 |
update_mask |= MSR_EFER_NXE; |
| 306 |
} |
| 307 |
if (env->cpuid_ext3_features & CPUID_EXT3_SVM) {
|
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update_mask |= MSR_EFER_SVME; |
| 309 |
} |
| 310 |
if (env->cpuid_ext2_features & CPUID_EXT2_FFXSR) {
|
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update_mask |= MSR_EFER_FFXSR; |
| 312 |
} |
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cpu_load_efer(env, (env->efer & ~update_mask) | |
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(val & update_mask)); |
| 315 |
} |
| 316 |
break;
|
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case MSR_STAR:
|
| 318 |
env->star = val; |
| 319 |
break;
|
| 320 |
case MSR_PAT:
|
| 321 |
env->pat = val; |
| 322 |
break;
|
| 323 |
case MSR_VM_HSAVE_PA:
|
| 324 |
env->vm_hsave = val; |
| 325 |
break;
|
| 326 |
#ifdef TARGET_X86_64
|
| 327 |
case MSR_LSTAR:
|
| 328 |
env->lstar = val; |
| 329 |
break;
|
| 330 |
case MSR_CSTAR:
|
| 331 |
env->cstar = val; |
| 332 |
break;
|
| 333 |
case MSR_FMASK:
|
| 334 |
env->fmask = val; |
| 335 |
break;
|
| 336 |
case MSR_FSBASE:
|
| 337 |
env->segs[R_FS].base = val; |
| 338 |
break;
|
| 339 |
case MSR_GSBASE:
|
| 340 |
env->segs[R_GS].base = val; |
| 341 |
break;
|
| 342 |
case MSR_KERNELGSBASE:
|
| 343 |
env->kernelgsbase = val; |
| 344 |
break;
|
| 345 |
#endif
|
| 346 |
case MSR_MTRRphysBase(0): |
| 347 |
case MSR_MTRRphysBase(1): |
| 348 |
case MSR_MTRRphysBase(2): |
| 349 |
case MSR_MTRRphysBase(3): |
| 350 |
case MSR_MTRRphysBase(4): |
| 351 |
case MSR_MTRRphysBase(5): |
| 352 |
case MSR_MTRRphysBase(6): |
| 353 |
case MSR_MTRRphysBase(7): |
| 354 |
env->mtrr_var[((uint32_t)ECX - MSR_MTRRphysBase(0)) / 2].base = val; |
| 355 |
break;
|
| 356 |
case MSR_MTRRphysMask(0): |
| 357 |
case MSR_MTRRphysMask(1): |
| 358 |
case MSR_MTRRphysMask(2): |
| 359 |
case MSR_MTRRphysMask(3): |
| 360 |
case MSR_MTRRphysMask(4): |
| 361 |
case MSR_MTRRphysMask(5): |
| 362 |
case MSR_MTRRphysMask(6): |
| 363 |
case MSR_MTRRphysMask(7): |
| 364 |
env->mtrr_var[((uint32_t)ECX - MSR_MTRRphysMask(0)) / 2].mask = val; |
| 365 |
break;
|
| 366 |
case MSR_MTRRfix64K_00000:
|
| 367 |
env->mtrr_fixed[(uint32_t)ECX - MSR_MTRRfix64K_00000] = val; |
| 368 |
break;
|
| 369 |
case MSR_MTRRfix16K_80000:
|
| 370 |
case MSR_MTRRfix16K_A0000:
|
| 371 |
env->mtrr_fixed[(uint32_t)ECX - MSR_MTRRfix16K_80000 + 1] = val;
|
| 372 |
break;
|
| 373 |
case MSR_MTRRfix4K_C0000:
|
| 374 |
case MSR_MTRRfix4K_C8000:
|
| 375 |
case MSR_MTRRfix4K_D0000:
|
| 376 |
case MSR_MTRRfix4K_D8000:
|
| 377 |
case MSR_MTRRfix4K_E0000:
|
| 378 |
case MSR_MTRRfix4K_E8000:
|
| 379 |
case MSR_MTRRfix4K_F0000:
|
| 380 |
case MSR_MTRRfix4K_F8000:
|
| 381 |
env->mtrr_fixed[(uint32_t)ECX - MSR_MTRRfix4K_C0000 + 3] = val;
|
| 382 |
break;
|
| 383 |
case MSR_MTRRdefType:
|
| 384 |
env->mtrr_deftype = val; |
| 385 |
break;
|
| 386 |
case MSR_MCG_STATUS:
|
| 387 |
env->mcg_status = val; |
| 388 |
break;
|
| 389 |
case MSR_MCG_CTL:
|
| 390 |
if ((env->mcg_cap & MCG_CTL_P)
|
| 391 |
&& (val == 0 || val == ~(uint64_t)0)) { |
| 392 |
env->mcg_ctl = val; |
| 393 |
} |
| 394 |
break;
|
| 395 |
case MSR_TSC_AUX:
|
| 396 |
env->tsc_aux = val; |
| 397 |
break;
|
| 398 |
case MSR_IA32_MISC_ENABLE:
|
| 399 |
env->msr_ia32_misc_enable = val; |
| 400 |
break;
|
| 401 |
default:
|
| 402 |
if ((uint32_t)ECX >= MSR_MC0_CTL
|
| 403 |
&& (uint32_t)ECX < MSR_MC0_CTL + (4 * env->mcg_cap & 0xff)) { |
| 404 |
uint32_t offset = (uint32_t)ECX - MSR_MC0_CTL; |
| 405 |
if ((offset & 0x3) != 0 |
| 406 |
|| (val == 0 || val == ~(uint64_t)0)) { |
| 407 |
env->mce_banks[offset] = val; |
| 408 |
} |
| 409 |
break;
|
| 410 |
} |
| 411 |
/* XXX: exception? */
|
| 412 |
break;
|
| 413 |
} |
| 414 |
} |
| 415 |
|
| 416 |
void helper_rdmsr(void) |
| 417 |
{
|
| 418 |
uint64_t val; |
| 419 |
|
| 420 |
cpu_svm_check_intercept_param(env, SVM_EXIT_MSR, 0);
|
| 421 |
|
| 422 |
switch ((uint32_t)ECX) {
|
| 423 |
case MSR_IA32_SYSENTER_CS:
|
| 424 |
val = env->sysenter_cs; |
| 425 |
break;
|
| 426 |
case MSR_IA32_SYSENTER_ESP:
|
| 427 |
val = env->sysenter_esp; |
| 428 |
break;
|
| 429 |
case MSR_IA32_SYSENTER_EIP:
|
| 430 |
val = env->sysenter_eip; |
| 431 |
break;
|
| 432 |
case MSR_IA32_APICBASE:
|
| 433 |
val = cpu_get_apic_base(env->apic_state); |
| 434 |
break;
|
| 435 |
case MSR_EFER:
|
| 436 |
val = env->efer; |
| 437 |
break;
|
| 438 |
case MSR_STAR:
|
| 439 |
val = env->star; |
| 440 |
break;
|
| 441 |
case MSR_PAT:
|
| 442 |
val = env->pat; |
| 443 |
break;
|
| 444 |
case MSR_VM_HSAVE_PA:
|
| 445 |
val = env->vm_hsave; |
| 446 |
break;
|
| 447 |
case MSR_IA32_PERF_STATUS:
|
| 448 |
/* tsc_increment_by_tick */
|
| 449 |
val = 1000ULL;
|
| 450 |
/* CPU multiplier */
|
| 451 |
val |= (((uint64_t)4ULL) << 40); |
| 452 |
break;
|
| 453 |
#ifdef TARGET_X86_64
|
| 454 |
case MSR_LSTAR:
|
| 455 |
val = env->lstar; |
| 456 |
break;
|
| 457 |
case MSR_CSTAR:
|
| 458 |
val = env->cstar; |
| 459 |
break;
|
| 460 |
case MSR_FMASK:
|
| 461 |
val = env->fmask; |
| 462 |
break;
|
| 463 |
case MSR_FSBASE:
|
| 464 |
val = env->segs[R_FS].base; |
| 465 |
break;
|
| 466 |
case MSR_GSBASE:
|
| 467 |
val = env->segs[R_GS].base; |
| 468 |
break;
|
| 469 |
case MSR_KERNELGSBASE:
|
| 470 |
val = env->kernelgsbase; |
| 471 |
break;
|
| 472 |
case MSR_TSC_AUX:
|
| 473 |
val = env->tsc_aux; |
| 474 |
break;
|
| 475 |
#endif
|
| 476 |
case MSR_MTRRphysBase(0): |
| 477 |
case MSR_MTRRphysBase(1): |
| 478 |
case MSR_MTRRphysBase(2): |
| 479 |
case MSR_MTRRphysBase(3): |
| 480 |
case MSR_MTRRphysBase(4): |
| 481 |
case MSR_MTRRphysBase(5): |
| 482 |
case MSR_MTRRphysBase(6): |
| 483 |
case MSR_MTRRphysBase(7): |
| 484 |
val = env->mtrr_var[((uint32_t)ECX - MSR_MTRRphysBase(0)) / 2].base; |
| 485 |
break;
|
| 486 |
case MSR_MTRRphysMask(0): |
| 487 |
case MSR_MTRRphysMask(1): |
| 488 |
case MSR_MTRRphysMask(2): |
| 489 |
case MSR_MTRRphysMask(3): |
| 490 |
case MSR_MTRRphysMask(4): |
| 491 |
case MSR_MTRRphysMask(5): |
| 492 |
case MSR_MTRRphysMask(6): |
| 493 |
case MSR_MTRRphysMask(7): |
| 494 |
val = env->mtrr_var[((uint32_t)ECX - MSR_MTRRphysMask(0)) / 2].mask; |
| 495 |
break;
|
| 496 |
case MSR_MTRRfix64K_00000:
|
| 497 |
val = env->mtrr_fixed[0];
|
| 498 |
break;
|
| 499 |
case MSR_MTRRfix16K_80000:
|
| 500 |
case MSR_MTRRfix16K_A0000:
|
| 501 |
val = env->mtrr_fixed[(uint32_t)ECX - MSR_MTRRfix16K_80000 + 1];
|
| 502 |
break;
|
| 503 |
case MSR_MTRRfix4K_C0000:
|
| 504 |
case MSR_MTRRfix4K_C8000:
|
| 505 |
case MSR_MTRRfix4K_D0000:
|
| 506 |
case MSR_MTRRfix4K_D8000:
|
| 507 |
case MSR_MTRRfix4K_E0000:
|
| 508 |
case MSR_MTRRfix4K_E8000:
|
| 509 |
case MSR_MTRRfix4K_F0000:
|
| 510 |
case MSR_MTRRfix4K_F8000:
|
| 511 |
val = env->mtrr_fixed[(uint32_t)ECX - MSR_MTRRfix4K_C0000 + 3];
|
| 512 |
break;
|
| 513 |
case MSR_MTRRdefType:
|
| 514 |
val = env->mtrr_deftype; |
| 515 |
break;
|
| 516 |
case MSR_MTRRcap:
|
| 517 |
if (env->cpuid_features & CPUID_MTRR) {
|
| 518 |
val = MSR_MTRRcap_VCNT | MSR_MTRRcap_FIXRANGE_SUPPORT | |
| 519 |
MSR_MTRRcap_WC_SUPPORTED; |
| 520 |
} else {
|
| 521 |
/* XXX: exception? */
|
| 522 |
val = 0;
|
| 523 |
} |
| 524 |
break;
|
| 525 |
case MSR_MCG_CAP:
|
| 526 |
val = env->mcg_cap; |
| 527 |
break;
|
| 528 |
case MSR_MCG_CTL:
|
| 529 |
if (env->mcg_cap & MCG_CTL_P) {
|
| 530 |
val = env->mcg_ctl; |
| 531 |
} else {
|
| 532 |
val = 0;
|
| 533 |
} |
| 534 |
break;
|
| 535 |
case MSR_MCG_STATUS:
|
| 536 |
val = env->mcg_status; |
| 537 |
break;
|
| 538 |
case MSR_IA32_MISC_ENABLE:
|
| 539 |
val = env->msr_ia32_misc_enable; |
| 540 |
break;
|
| 541 |
default:
|
| 542 |
if ((uint32_t)ECX >= MSR_MC0_CTL
|
| 543 |
&& (uint32_t)ECX < MSR_MC0_CTL + (4 * env->mcg_cap & 0xff)) { |
| 544 |
uint32_t offset = (uint32_t)ECX - MSR_MC0_CTL; |
| 545 |
val = env->mce_banks[offset]; |
| 546 |
break;
|
| 547 |
} |
| 548 |
/* XXX: exception? */
|
| 549 |
val = 0;
|
| 550 |
break;
|
| 551 |
} |
| 552 |
EAX = (uint32_t)(val); |
| 553 |
EDX = (uint32_t)(val >> 32);
|
| 554 |
} |
| 555 |
#endif
|
| 556 |
|
| 557 |
static void do_hlt(void) |
| 558 |
{
|
| 559 |
env->hflags &= ~HF_INHIBIT_IRQ_MASK; /* needed if sti is just before */
|
| 560 |
env->halted = 1;
|
| 561 |
env->exception_index = EXCP_HLT; |
| 562 |
cpu_loop_exit(env); |
| 563 |
} |
| 564 |
|
| 565 |
void helper_hlt(int next_eip_addend) |
| 566 |
{
|
| 567 |
cpu_svm_check_intercept_param(env, SVM_EXIT_HLT, 0);
|
| 568 |
EIP += next_eip_addend; |
| 569 |
|
| 570 |
do_hlt(); |
| 571 |
} |
| 572 |
|
| 573 |
void helper_monitor(target_ulong ptr)
|
| 574 |
{
|
| 575 |
if ((uint32_t)ECX != 0) { |
| 576 |
raise_exception(env, EXCP0D_GPF); |
| 577 |
} |
| 578 |
/* XXX: store address? */
|
| 579 |
cpu_svm_check_intercept_param(env, SVM_EXIT_MONITOR, 0);
|
| 580 |
} |
| 581 |
|
| 582 |
void helper_mwait(int next_eip_addend) |
| 583 |
{
|
| 584 |
if ((uint32_t)ECX != 0) { |
| 585 |
raise_exception(env, EXCP0D_GPF); |
| 586 |
} |
| 587 |
cpu_svm_check_intercept_param(env, SVM_EXIT_MWAIT, 0);
|
| 588 |
EIP += next_eip_addend; |
| 589 |
|
| 590 |
/* XXX: not complete but not completely erroneous */
|
| 591 |
if (env->cpu_index != 0 || env->next_cpu != NULL) { |
| 592 |
/* more than one CPU: do not sleep because another CPU may
|
| 593 |
wake this one */
|
| 594 |
} else {
|
| 595 |
do_hlt(); |
| 596 |
} |
| 597 |
} |
| 598 |
|
| 599 |
void helper_debug(void) |
| 600 |
{
|
| 601 |
env->exception_index = EXCP_DEBUG; |
| 602 |
cpu_loop_exit(env); |
| 603 |
} |