[PATCH 4/9] target/arm: add asserts for code paths not leveraged when using the vGIC

[Mohamed Mediouni <mohamed@unpredictable.fr>]

When using the vGIC, timers are directly handled by the platform, so no vmexits ought to happen in that case.

Signed-off-by: Mohamed Mediouni <mohamed@unpredictable.fr>
---
 target/arm/hvf/hvf.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
index bb31df90b8..7b4e8297af 100644
--- a/target/arm/hvf/hvf.c
+++ b/target/arm/hvf/hvf.c
@@ -1378,6 +1378,9 @@ static int hvf_sysreg_read(CPUState *cpu, uint32_t reg, uint64_t *val)
     case SYSREG_ICC_SGI1R_EL1:
     case SYSREG_ICC_SRE_EL1:
     case SYSREG_ICC_CTLR_EL1:
+        if (hvf_irqchip_in_kernel()) {
+            abort();
+        }
         /* Call the TCG sysreg handler. This is only safe for GICv3 regs. */
         if (hvf_sysreg_read_cp(cpu, reg, val)) {
             return 0;
@@ -1694,6 +1697,9 @@ static int hvf_sysreg_write(CPUState *cpu, uint32_t reg, uint64_t val)
     case SYSREG_ICC_SGI0R_EL1:
     case SYSREG_ICC_SGI1R_EL1:
     case SYSREG_ICC_SRE_EL1:
+        if (hvf_irqchip_in_kernel()) {
+            abort();
+        }
         /* Call the TCG sysreg handler. This is only safe for GICv3 regs. */
         if (hvf_sysreg_write_cp(cpu, reg, val)) {
             return 0;
@@ -1957,6 +1963,10 @@ int hvf_vcpu_exec(CPUState *cpu)
         /* This is the main one, handle below. */
         break;
     case HV_EXIT_REASON_VTIMER_ACTIVATED:
+        /* This is only for when a user-mode irqchip is used. */
+        if (hvf_irqchip_in_kernel()) {
+            assert("vtimer activated vmexit when using platform GIC");
+        }
         qemu_set_irq(arm_cpu->gt_timer_outputs[GTIMER_VIRT], 1);
         cpu->accel->vtimer_masked = true;
         return 0;
-- 
2.39.5 (Apple Git-154)