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target/i386: limit a20 to system emulation

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It is not used by user-mode emulation and is the only caller of
cpu_interrupt() in qemu-i386 and qemu-x86_64.

Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2025-08-29 10:43:44 +02:00
parent a445d3b85c
commit 3efe1a0f60
1 changed files with 2 additions and 0 deletions
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2
target/i386/helper.c
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@ -110,6 +110,7 @@ int cpu_x86_support_mca_broadcast(CPUX86State *env)
/* x86 mmu */
/* XXX: add PGE support */
#ifndef CONFIG_USER_ONLY
void x86_cpu_set_a20(X86CPU *cpu, int a20_state)
{
CPUX86State *env = &cpu->env;
@ -129,6 +130,7 @@ void x86_cpu_set_a20(X86CPU *cpu, int a20_state)
env->a20_mask = ~(1 << 20) | (a20_state << 20);
}
}
#endif
void cpu_x86_update_cr0(CPUX86State *env, uint32_t new_cr0)
{