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[4/5] i386/hvf: Raise exception on error setting APICBASE

Message ID 20241105155800.5461-5-phil@philjordan.eu
State New
Headers show
Series i386/hvf: x2apic support and some small fixes | expand

Commit Message

Phil Dennis-Jordan Nov. 5, 2024, 3:57 p.m. UTC 
When setting the APICBASE MSR to an illegal value, the APIC
implementation will return an error. This change forwards that report
to the guest as an exception rather than ignoring it when using the hvf
accelerator.

Signed-off-by: Phil Dennis-Jordan <phil@philjordan.eu>
---
 target/i386/hvf/x86_emu.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/target/i386/hvf/x86_emu.c b/target/i386/hvf/x86_emu.c
index be675bcfb71..015f760acb3 100644
--- a/target/i386/hvf/x86_emu.c
+++ b/target/i386/hvf/x86_emu.c
@@ -794,9 +794,16 @@  void simulate_wrmsr(CPUX86State *env)
     switch (msr) {
     case MSR_IA32_TSC:
         break;
-    case MSR_IA32_APICBASE:
-        cpu_set_apic_base(cpu->apic_state, data);
+    case MSR_IA32_APICBASE: {
+        int r;
+
+        r = cpu_set_apic_base(cpu->apic_state, data);
+        if (r < 0) {
+            raise_exception(env, EXCP0D_GPF, 0);
+        }
+
         break;
+    }
     case MSR_APIC_START ... MSR_APIC_END: {
         int ret;
         int index = (uint32_t)env->regs[R_ECX] - MSR_APIC_START;