[PATCH v2 6/7] target/xtensa: Honour -semihosting-config userspace=on

[Peter Maydell <peter.maydell@linaro.org>]

Honour the commandline -semihosting-config userspace=on option,
instead of always permitting userspace semihosting calls in system
emulation mode, by passing the correct value to the is_userspace
argument of semihosting_enabled().

Note that this is a behaviour change: if the user wants to
do semihosting calls from userspace they must now specifically
enable them on the command line.

xtensa semihosting is not implemented for linux-user builds.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/xtensa/translate.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/target/xtensa/translate.c b/target/xtensa/translate.c
index dc475a4274b..43d55989349 100644
--- a/target/xtensa/translate.c
+++ b/target/xtensa/translate.c
@@ -2360,13 +2360,14 @@ static uint32_t test_exceptions_simcall(DisasContext *dc,
                                         const OpcodeArg arg[],
                                         const uint32_t par[])
 {
+    bool is_semi = semihosting_enabled(dc->cring != 0);
 #ifdef CONFIG_USER_ONLY
     bool ill = true;
 #else
     /* Between RE.2 and RE.3 simcall opcode's become nop for the hardware. */
-    bool ill = dc->config->hw_version <= 250002 && !semihosting_enabled(false);
+    bool ill = dc->config->hw_version <= 250002 && !is_semi;
 #endif
-    if (ill || !semihosting_enabled(false)) {
+    if (ill || !is_semi) {
         qemu_log_mask(LOG_GUEST_ERROR, "SIMCALL but semihosting is disabled\n");
     }
     return ill ? XTENSA_OP_ILL : 0;
@@ -2376,7 +2377,7 @@ static void translate_simcall(DisasContext *dc, const OpcodeArg arg[],
                               const uint32_t par[])
 {
 #ifndef CONFIG_USER_ONLY
-    if (semihosting_enabled(false)) {
+    if (semihosting_enabled(dc->cring != 0)) {
         gen_helper_simcall(cpu_env);
     }
 #endif
-- 
2.25.1