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target/arm/hvf/hvf: Document $pc adjustment in HVF & SMC

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Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé
2025-10-31 16:26:46 +00:00
committed by Peter Maydell
parent 06ddd61f81
commit 31e1b98230
1 changed files with 2 additions and 0 deletions
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target/arm/hvf/hvf.c
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@@ -1936,6 +1936,7 @@ static int hvf_handle_exception(CPUState *cpu, hv_vcpu_exit_exception_t *excp)
case EC_AA64_HVC:
cpu_synchronize_state(cpu);
if (arm_is_psci_call(arm_cpu, EXCP_HVC)) {
/* Do NOT advance $pc for HVC */
if (!hvf_handle_psci_call(cpu)) {
trace_hvf_unknown_hvc(env->pc, env->xregs[0]);
/* SMCCC 1.3 section 5.2 says every unknown SMCCC call returns -1 */
@@ -1949,6 +1950,7 @@ static int hvf_handle_exception(CPUState *cpu, hv_vcpu_exit_exception_t *excp)
case EC_AA64_SMC:
cpu_synchronize_state(cpu);
if (arm_is_psci_call(arm_cpu, EXCP_SMC)) {
/* Secure Monitor Call exception, we need to advance $pc */
advance_pc = true;
if (!hvf_handle_psci_call(cpu)) {