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authorPhilippe Mathieu-Daudé <f4bug@amsat.org>2021-09-11 18:54:20 +0200
committerRichard Henderson <richard.henderson@linaro.org>2021-09-14 12:00:21 -0700
commit604664726f400ca3857a28d7169542596dd83dd0 (patch)
tree667e7cd6bff6d6bdefb9b1b98ea391faf15d9499 /target/i386/tcg
parent68fa1780e07cb0a649d7cbd5c753cedcfe2e46c4 (diff)
target/i386: Restrict cpu_exec_interrupt() handler to sysemu
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>
Diffstat (limited to 'target/i386/tcg')
-rw-r--r--target/i386/tcg/helper-tcg.h2
-rw-r--r--target/i386/tcg/seg_helper.c10
-rw-r--r--target/i386/tcg/tcg-cpu.c2
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 */