[PULL 18/44] target/i386: Restrict cpu_exec_interrupt() handler to sysemu

[Richard Henderson]

From: Philippe Mathieu-Daudé <f4bug@amsat.org>

Restrict cpu_exec_interrupt() and its callees to sysemu.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210911165434.531552-11-f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/i386/tcg/helper-tcg.h |  2 ++
 target/i386/tcg/seg_helper.c | 10 ++--------
 target/i386/tcg/tcg-cpu.c    |  2 +-
 3 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/target/i386/tcg/helper-tcg.h b/target/i386/tcg/helper-tcg.h
index 2510cc244e..60ca09e95e 100644
--- a/target/i386/tcg/helper-tcg.h
+++ b/target/i386/tcg/helper-tcg.h
@@ -38,7 +38,9 @@ QEMU_BUILD_BUG_ON(TCG_PHYS_ADDR_BITS > 
TARGET_PHYS_ADDR_SPACE_BITS);
  * @cpu: vCPU the interrupt is to be handled by.
  */
 void x86_cpu_do_interrupt(CPUState *cpu);
+#ifndef CONFIG_USER_ONLY
 bool x86_cpu_exec_interrupt(CPUState *cpu, int int_req);
+#endif
 
 /* helper.c */
 bool x86_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
diff --git a/target/i386/tcg/seg_helper.c b/target/i386/tcg/seg_helper.c
index 56263e358d..4e6f26a7b7 100644
--- a/target/i386/tcg/seg_helper.c
+++ b/target/i386/tcg/seg_helper.c
@@ -1110,6 +1110,7 @@ void do_interrupt_x86_hardirq(CPUX86State *env, int 
intno, int is_hw)
     do_interrupt_all(env_archcpu(env), intno, 0, 0, 0, is_hw);
 }
 
+#ifndef CONFIG_USER_ONLY
 bool x86_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
 {
     X86CPU *cpu = X86_CPU(cs);
@@ -1125,23 +1126,17 @@ bool x86_cpu_exec_interrupt(CPUState *cs, int 
interrupt_request)
      * This is required to make icount-driven execution deterministic.
      */
     switch (interrupt_request) {
-#if !defined(CONFIG_USER_ONLY)
     case CPU_INTERRUPT_POLL:
         cs->interrupt_request &= ~CPU_INTERRUPT_POLL;
         apic_poll_irq(cpu->apic_state);
         break;
-#endif
     case CPU_INTERRUPT_SIPI:
         do_cpu_sipi(cpu);
         break;
     case CPU_INTERRUPT_SMI:
         cpu_svm_check_intercept_param(env, SVM_EXIT_SMI, 0, 0);
         cs->interrupt_request &= ~CPU_INTERRUPT_SMI;
-#ifdef CONFIG_USER_ONLY
-        cpu_abort(CPU(cpu), "SMI interrupt: cannot enter SMM in user-mode");
-#else
         do_smm_enter(cpu);
-#endif /* CONFIG_USER_ONLY */
         break;
     case CPU_INTERRUPT_NMI:
         cpu_svm_check_intercept_param(env, SVM_EXIT_NMI, 0, 0);
@@ -1162,7 +1157,6 @@ bool x86_cpu_exec_interrupt(CPUState *cs, int 
interrupt_request)
                       "Servicing hardware INT=0x%02x\n", intno);
         do_interrupt_x86_hardirq(env, intno, 1);
         break;
-#if !defined(CONFIG_USER_ONLY)
     case CPU_INTERRUPT_VIRQ:
         cpu_svm_check_intercept_param(env, SVM_EXIT_VINTR, 0, 0);
         intno = x86_ldl_phys(cs, env->vm_vmcb
@@ -1173,12 +1167,12 @@ bool x86_cpu_exec_interrupt(CPUState *cs, int 
interrupt_request)
         cs->interrupt_request &= ~CPU_INTERRUPT_VIRQ;
         env->int_ctl &= ~V_IRQ_MASK;
         break;
-#endif
     }
 
     /* Ensure that no TB jump will be modified as the program flow was 
changed.  */
     return true;
 }
+#endif /* CONFIG_USER_ONLY */
 
 void helper_lldt(CPUX86State *env, int selector)
 {
diff --git a/target/i386/tcg/tcg-cpu.c b/target/i386/tcg/tcg-cpu.c
index 04c35486a2..3ecfae34cb 100644
--- a/target/i386/tcg/tcg-cpu.c
+++ b/target/i386/tcg/tcg-cpu.c
@@ -72,12 +72,12 @@ static const struct TCGCPUOps x86_tcg_ops = {
     .synchronize_from_tb = x86_cpu_synchronize_from_tb,
     .cpu_exec_enter = x86_cpu_exec_enter,
     .cpu_exec_exit = x86_cpu_exec_exit,
-    .cpu_exec_interrupt = x86_cpu_exec_interrupt,
     .tlb_fill = x86_cpu_tlb_fill,
 #ifdef CONFIG_USER_ONLY
     .fake_user_interrupt = x86_cpu_do_interrupt,
 #else
     .do_interrupt = x86_cpu_do_interrupt,
+    .cpu_exec_interrupt = x86_cpu_exec_interrupt,
     .debug_excp_handler = breakpoint_handler,
     .debug_check_breakpoint = x86_debug_check_breakpoint,
 #endif /* !CONFIG_USER_ONLY */
-- 
2.25.1