diff mbox series

[v2,37/50] target/i386: Remove pc_start argument to gen_svm_check_intercept

Message ID 20210514151342.384376-38-richard.henderson@linaro.org (mailing list archive)
State New, archived
Headers show
Series target/i386 translate cleanups | expand

Commit Message

Richard Henderson May 14, 2021, 3:13 p.m. UTC
When exiting helper_svm_check_intercept via exception, cpu_vmexit
calls cpu_restore_state, which will recover eip and cc_op via unwind.
Therefore we do not need to store eip or cc_op before the call.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/i386/tcg/translate.c | 45 +++++++++++++++++--------------------
 1 file changed, 21 insertions(+), 24 deletions(-)

Comments

Paolo Bonzini May 18, 2021, 9:58 a.m. UTC | #1
On 14/05/21 17:13, Richard Henderson wrote:
> When exiting helper_svm_check_intercept via exception, cpu_vmexit
> calls cpu_restore_state, which will recover eip and cc_op via unwind.
> Therefore we do not need to store eip or cc_op before the call.
> 
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>   target/i386/tcg/translate.c | 45 +++++++++++++++++--------------------
>   1 file changed, 21 insertions(+), 24 deletions(-)

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
diff mbox series

Patch

diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c
index 12ef2cf064..d0fef4cce8 100644
--- a/target/i386/tcg/translate.c
+++ b/target/i386/tcg/translate.c
@@ -2423,15 +2423,12 @@  static inline int svm_is_rep(int prefixes)
     return ((prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) ? 8 : 0);
 }
 
-static void gen_svm_check_intercept(DisasContext *s, target_ulong pc_start,
-                                    uint32_t type)
+static void gen_svm_check_intercept(DisasContext *s, uint32_t type)
 {
     /* no SVM activated; fast case */
     if (likely(!GUEST(s))) {
         return;
     }
-    gen_update_cc_op(s);
-    gen_jmp_im(s, pc_start - s->cs_base);
     gen_helper_svm_check_intercept(cpu_env, tcg_constant_i32(type));
 }
 
@@ -6639,7 +6636,7 @@  static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
         val = 0;
         goto do_lret;
     case 0xcf: /* iret */
-        gen_svm_check_intercept(s, pc_start, SVM_EXIT_IRET);
+        gen_svm_check_intercept(s, SVM_EXIT_IRET);
         if (!PE(s) || VM86(s)) {
             /* real mode or vm86 mode */
             if (!check_vm86_iopl(s)) {
@@ -6761,7 +6758,7 @@  static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
         /************************/
         /* flags */
     case 0x9c: /* pushf */
-        gen_svm_check_intercept(s, pc_start, SVM_EXIT_PUSHF);
+        gen_svm_check_intercept(s, SVM_EXIT_PUSHF);
         if (check_vm86_iopl(s)) {
             gen_update_cc_op(s);
             gen_helper_read_eflags(s->T0, cpu_env);
@@ -6769,7 +6766,7 @@  static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
         }
         break;
     case 0x9d: /* popf */
-        gen_svm_check_intercept(s, pc_start, SVM_EXIT_POPF);
+        gen_svm_check_intercept(s, SVM_EXIT_POPF);
         if (check_vm86_iopl(s)) {
             ot = gen_pop_T0(s);
             if (CPL(s) == 0) {
@@ -7143,7 +7140,7 @@  static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
         break;
 #ifdef WANT_ICEBP
     case 0xf1: /* icebp (undocumented, exits to external debugger) */
-        gen_svm_check_intercept(s, pc_start, SVM_EXIT_ICEBP);
+        gen_svm_check_intercept(s, SVM_EXIT_ICEBP);
         gen_debug(s);
         break;
 #endif
@@ -7347,7 +7344,7 @@  static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
         case 0: /* sldt */
             if (!PE(s) || VM86(s))
                 goto illegal_op;
-            gen_svm_check_intercept(s, pc_start, SVM_EXIT_LDTR_READ);
+            gen_svm_check_intercept(s, SVM_EXIT_LDTR_READ);
             tcg_gen_ld32u_tl(s->T0, cpu_env,
                              offsetof(CPUX86State, ldt.selector));
             ot = mod == 3 ? dflag : MO_16;
@@ -7357,7 +7354,7 @@  static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
             if (!PE(s) || VM86(s))
                 goto illegal_op;
             if (check_cpl0(s)) {
-                gen_svm_check_intercept(s, pc_start, SVM_EXIT_LDTR_WRITE);
+                gen_svm_check_intercept(s, SVM_EXIT_LDTR_WRITE);
                 gen_ldst_modrm(env, s, modrm, MO_16, OR_TMP0, 0);
                 tcg_gen_trunc_tl_i32(s->tmp2_i32, s->T0);
                 gen_helper_lldt(cpu_env, s->tmp2_i32);
@@ -7366,7 +7363,7 @@  static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
         case 1: /* str */
             if (!PE(s) || VM86(s))
                 goto illegal_op;
-            gen_svm_check_intercept(s, pc_start, SVM_EXIT_TR_READ);
+            gen_svm_check_intercept(s, SVM_EXIT_TR_READ);
             tcg_gen_ld32u_tl(s->T0, cpu_env,
                              offsetof(CPUX86State, tr.selector));
             ot = mod == 3 ? dflag : MO_16;
@@ -7376,7 +7373,7 @@  static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
             if (!PE(s) || VM86(s))
                 goto illegal_op;
             if (check_cpl0(s)) {
-                gen_svm_check_intercept(s, pc_start, SVM_EXIT_TR_WRITE);
+                gen_svm_check_intercept(s, SVM_EXIT_TR_WRITE);
                 gen_ldst_modrm(env, s, modrm, MO_16, OR_TMP0, 0);
                 tcg_gen_trunc_tl_i32(s->tmp2_i32, s->T0);
                 gen_helper_ltr(cpu_env, s->tmp2_i32);
@@ -7404,7 +7401,7 @@  static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
         modrm = x86_ldub_code(env, s);
         switch (modrm) {
         CASE_MODRM_MEM_OP(0): /* sgdt */
-            gen_svm_check_intercept(s, pc_start, SVM_EXIT_GDTR_READ);
+            gen_svm_check_intercept(s, SVM_EXIT_GDTR_READ);
             gen_lea_modrm(env, s, modrm);
             tcg_gen_ld32u_tl(s->T0,
                              cpu_env, offsetof(CPUX86State, gdt.limit));
@@ -7460,7 +7457,7 @@  static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
             break;
 
         CASE_MODRM_MEM_OP(1): /* sidt */
-            gen_svm_check_intercept(s, pc_start, SVM_EXIT_IDTR_READ);
+            gen_svm_check_intercept(s, SVM_EXIT_IDTR_READ);
             gen_lea_modrm(env, s, modrm);
             tcg_gen_ld32u_tl(s->T0, cpu_env, offsetof(CPUX86State, idt.limit));
             gen_op_st_v(s, MO_16, s->T0, s->A0);
@@ -7580,7 +7577,7 @@  static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
                 || !PE(s)) {
                 goto illegal_op;
             }
-            gen_svm_check_intercept(s, pc_start, SVM_EXIT_SKINIT);
+            gen_svm_check_intercept(s, SVM_EXIT_SKINIT);
             /* If not intercepted, not implemented -- raise #UD. */
             goto illegal_op;
 
@@ -7600,7 +7597,7 @@  static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
             if (!check_cpl0(s)) {
                 break;
             }
-            gen_svm_check_intercept(s, pc_start, SVM_EXIT_GDTR_WRITE);
+            gen_svm_check_intercept(s, SVM_EXIT_GDTR_WRITE);
             gen_lea_modrm(env, s, modrm);
             gen_op_ld_v(s, MO_16, s->T1, s->A0);
             gen_add_A0_im(s, 2);
@@ -7616,7 +7613,7 @@  static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
             if (!check_cpl0(s)) {
                 break;
             }
-            gen_svm_check_intercept(s, pc_start, SVM_EXIT_IDTR_WRITE);
+            gen_svm_check_intercept(s, SVM_EXIT_IDTR_WRITE);
             gen_lea_modrm(env, s, modrm);
             gen_op_ld_v(s, MO_16, s->T1, s->A0);
             gen_add_A0_im(s, 2);
@@ -7629,7 +7626,7 @@  static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
             break;
 
         CASE_MODRM_OP(4): /* smsw */
-            gen_svm_check_intercept(s, pc_start, SVM_EXIT_READ_CR0);
+            gen_svm_check_intercept(s, SVM_EXIT_READ_CR0);
             tcg_gen_ld_tl(s->T0, cpu_env, offsetof(CPUX86State, cr[0]));
             /*
              * In 32-bit mode, the higher 16 bits of the destination
@@ -7661,7 +7658,7 @@  static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
             if (!check_cpl0(s)) {
                 break;
             }
-            gen_svm_check_intercept(s, pc_start, SVM_EXIT_WRITE_CR0);
+            gen_svm_check_intercept(s, SVM_EXIT_WRITE_CR0);
             gen_ldst_modrm(env, s, modrm, MO_16, OR_TMP0, 0);
             gen_helper_lmsw(cpu_env, s->T0);
             gen_jmp_im(s, s->pc - s->cs_base);
@@ -7718,7 +7715,7 @@  static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
     case 0x108: /* invd */
     case 0x109: /* wbinvd */
         if (check_cpl0(s)) {
-            gen_svm_check_intercept(s, pc_start, (b & 2) ? SVM_EXIT_INVD : SVM_EXIT_WBINVD);
+            gen_svm_check_intercept(s, (b & 2) ? SVM_EXIT_INVD : SVM_EXIT_WBINVD);
             /* nothing to do */
         }
         break;
@@ -8108,14 +8105,14 @@  static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
                 goto illegal_op;
             }
             if (b & 2) {
-                gen_svm_check_intercept(s, pc_start, SVM_EXIT_WRITE_DR0 + reg);
+                gen_svm_check_intercept(s, SVM_EXIT_WRITE_DR0 + reg);
                 gen_op_mov_v_reg(s, ot, s->T0, rm);
                 tcg_gen_movi_i32(s->tmp2_i32, reg);
                 gen_helper_set_dr(cpu_env, s->tmp2_i32, s->T0);
                 gen_jmp_im(s, s->pc - s->cs_base);
                 gen_eob(s);
             } else {
-                gen_svm_check_intercept(s, pc_start, SVM_EXIT_READ_DR0 + reg);
+                gen_svm_check_intercept(s, SVM_EXIT_READ_DR0 + reg);
                 tcg_gen_movi_i32(s->tmp2_i32, reg);
                 gen_helper_get_dr(s->T0, cpu_env, s->tmp2_i32);
                 gen_op_mov_reg_v(s, ot, rm, s->T0);
@@ -8124,7 +8121,7 @@  static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
         break;
     case 0x106: /* clts */
         if (check_cpl0(s)) {
-            gen_svm_check_intercept(s, pc_start, SVM_EXIT_WRITE_CR0);
+            gen_svm_check_intercept(s, SVM_EXIT_WRITE_CR0);
             gen_helper_clts(cpu_env);
             /* abort block because static cpu state changed */
             gen_jmp_im(s, s->pc - s->cs_base);
@@ -8351,7 +8348,7 @@  static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
         gen_nop_modrm(env, s, modrm);
         break;
     case 0x1aa: /* rsm */
-        gen_svm_check_intercept(s, pc_start, SVM_EXIT_RSM);
+        gen_svm_check_intercept(s, SVM_EXIT_RSM);
         if (!(s->flags & HF_SMM_MASK))
             goto illegal_op;
 #ifdef CONFIG_USER_ONLY