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target/arm: ensure PSCI register updates are flushed

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When we handle a host call we report state back to the caller via
registers. Set vcpu_dirty to indicate QEMU is currently the reference
and hoist the flush_cpu_state() and make the call unconditional.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/3228
Tested-by: Christian Stussak <christian.stussak@imaginary.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20251209092459.1058313-3-alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
This commit is contained in:
Alex Bennée
2025-12-09 16:21:35 +00:00
parent c22e943ea1
commit 2a425aae0b
1 changed files with 5 additions and 1 deletions
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target/arm/hvf/hvf.c
+5 -1
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@@ -1942,6 +1942,7 @@ static int hvf_handle_exception(CPUState *cpu, hv_vcpu_exit_exception_t *excp)
/* SMCCC 1.3 section 5.2 says every unknown SMCCC call returns -1 */
env->xregs[0] = -1;
}
cpu->vcpu_dirty = true;
} else {
trace_hvf_unknown_hvc(env->pc, env->xregs[0]);
hvf_raise_exception(cpu, EXCP_UDEF, syn_uncategorized(), 1);
@@ -1958,6 +1959,7 @@ static int hvf_handle_exception(CPUState *cpu, hv_vcpu_exit_exception_t *excp)
/* SMCCC 1.3 section 5.2 says every unknown SMCCC call returns -1 */
env->xregs[0] = -1;
}
cpu->vcpu_dirty = true;
} else {
trace_hvf_unknown_smc(env->xregs[0]);
hvf_raise_exception(cpu, EXCP_UDEF, syn_uncategorized(), 1);
@@ -1980,10 +1982,12 @@ static int hvf_handle_exception(CPUState *cpu, hv_vcpu_exit_exception_t *excp)
error_report("0x%llx: unhandled exception ec=0x%x", env->pc, ec);
}
/* flush any changed cpu state back to HVF */
flush_cpu_state(cpu);
if (advance_pc) {
uint64_t pc;
flush_cpu_state(cpu);
r = hv_vcpu_get_reg(cpu->accel->fd, HV_REG_PC, &pc);
assert_hvf_ok(r);