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Diffstat (limited to 'arch/powerpc/kernel/rtas.c')
-rw-r--r--arch/powerpc/kernel/rtas.c79
1 files changed, 38 insertions, 41 deletions
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index bb6f5370c279..31175b34856a 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -782,8 +782,8 @@ void rtas_progress(char *s, unsigned short hex)
"ibm,display-truncation-length", NULL);
of_node_put(root);
}
- display_character = rtas_token("display-character");
- set_indicator = rtas_token("set-indicator");
+ display_character = rtas_function_token(RTAS_FN_DISPLAY_CHARACTER);
+ set_indicator = rtas_function_token(RTAS_FN_SET_INDICATOR);
}
if (display_character == RTAS_UNKNOWN_SERVICE) {
@@ -937,7 +937,6 @@ static void __init init_error_log_max(void)
static char rtas_err_buf[RTAS_ERROR_LOG_MAX];
-static int rtas_last_error_token;
/** Return a copy of the detailed error text associated with the
* most recent failed call to rtas. Because the error text
@@ -947,16 +946,17 @@ static int rtas_last_error_token;
*/
static char *__fetch_rtas_last_error(char *altbuf)
{
+ const s32 token = rtas_function_token(RTAS_FN_RTAS_LAST_ERROR);
struct rtas_args err_args, save_args;
u32 bufsz;
char *buf = NULL;
- if (rtas_last_error_token == -1)
+ if (token == -1)
return NULL;
bufsz = rtas_get_error_log_max();
- err_args.token = cpu_to_be32(rtas_last_error_token);
+ err_args.token = cpu_to_be32(token);
err_args.nargs = cpu_to_be32(2);
err_args.nret = cpu_to_be32(1);
err_args.args[0] = cpu_to_be32(__pa(rtas_err_buf));
@@ -1025,8 +1025,11 @@ void rtas_call_unlocked(struct rtas_args *args, int token, int nargs, int nret,
va_end(list);
}
-static int ibm_open_errinjct_token;
-static int ibm_errinjct_token;
+static bool token_is_restricted_errinjct(s32 token)
+{
+ return token == rtas_function_token(RTAS_FN_IBM_OPEN_ERRINJCT) ||
+ token == rtas_function_token(RTAS_FN_IBM_ERRINJCT);
+}
/**
* rtas_call() - Invoke an RTAS firmware function.
@@ -1098,7 +1101,7 @@ int rtas_call(int token, int nargs, int nret, int *outputs, ...)
if (!rtas.entry || token == RTAS_UNKNOWN_SERVICE)
return -1;
- if (token == ibm_open_errinjct_token || token == ibm_errinjct_token) {
+ if (token_is_restricted_errinjct(token)) {
/*
* It would be nicer to not discard the error value
* from security_locked_down(), but callers expect an
@@ -1330,7 +1333,7 @@ static int rtas_error_rc(int rtas_rc)
int rtas_get_power_level(int powerdomain, int *level)
{
- int token = rtas_token("get-power-level");
+ int token = rtas_function_token(RTAS_FN_GET_POWER_LEVEL);
int rc;
if (token == RTAS_UNKNOWN_SERVICE)
@@ -1347,7 +1350,7 @@ EXPORT_SYMBOL_GPL(rtas_get_power_level);
int rtas_set_power_level(int powerdomain, int level, int *setlevel)
{
- int token = rtas_token("set-power-level");
+ int token = rtas_function_token(RTAS_FN_SET_POWER_LEVEL);
int rc;
if (token == RTAS_UNKNOWN_SERVICE)
@@ -1365,7 +1368,7 @@ EXPORT_SYMBOL_GPL(rtas_set_power_level);
int rtas_get_sensor(int sensor, int index, int *state)
{
- int token = rtas_token("get-sensor-state");
+ int token = rtas_function_token(RTAS_FN_GET_SENSOR_STATE);
int rc;
if (token == RTAS_UNKNOWN_SERVICE)
@@ -1383,7 +1386,7 @@ EXPORT_SYMBOL_GPL(rtas_get_sensor);
int rtas_get_sensor_fast(int sensor, int index, int *state)
{
- int token = rtas_token("get-sensor-state");
+ int token = rtas_function_token(RTAS_FN_GET_SENSOR_STATE);
int rc;
if (token == RTAS_UNKNOWN_SERVICE)
@@ -1425,7 +1428,7 @@ bool rtas_indicator_present(int token, int *maxindex)
int rtas_set_indicator(int indicator, int index, int new_value)
{
- int token = rtas_token("set-indicator");
+ int token = rtas_function_token(RTAS_FN_SET_INDICATOR);
int rc;
if (token == RTAS_UNKNOWN_SERVICE)
@@ -1446,8 +1449,8 @@ EXPORT_SYMBOL_GPL(rtas_set_indicator);
*/
int rtas_set_indicator_fast(int indicator, int index, int new_value)
{
+ int token = rtas_function_token(RTAS_FN_SET_INDICATOR);
int rc;
- int token = rtas_token("set-indicator");
if (token == RTAS_UNKNOWN_SERVICE)
return -ENOENT;
@@ -1489,10 +1492,11 @@ int rtas_set_indicator_fast(int indicator, int index, int new_value)
*/
int rtas_ibm_suspend_me(int *fw_status)
{
+ int token = rtas_function_token(RTAS_FN_IBM_SUSPEND_ME);
int fwrc;
int ret;
- fwrc = rtas_call(rtas_token("ibm,suspend-me"), 0, 1, NULL);
+ fwrc = rtas_call(token, 0, 1, NULL);
switch (fwrc) {
case 0:
@@ -1525,7 +1529,7 @@ void __noreturn rtas_restart(char *cmd)
if (rtas_flash_term_hook)
rtas_flash_term_hook(SYS_RESTART);
pr_emerg("system-reboot returned %d\n",
- rtas_call(rtas_token("system-reboot"), 0, 1, NULL));
+ rtas_call(rtas_function_token(RTAS_FN_SYSTEM_REBOOT), 0, 1, NULL));
for (;;);
}
@@ -1535,7 +1539,7 @@ void rtas_power_off(void)
rtas_flash_term_hook(SYS_POWER_OFF);
/* allow power on only with power button press */
pr_emerg("power-off returned %d\n",
- rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1));
+ rtas_call(rtas_function_token(RTAS_FN_POWER_OFF), 2, 1, NULL, -1, -1));
for (;;);
}
@@ -1545,16 +1549,17 @@ void __noreturn rtas_halt(void)
rtas_flash_term_hook(SYS_HALT);
/* allow power on only with power button press */
pr_emerg("power-off returned %d\n",
- rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1));
+ rtas_call(rtas_function_token(RTAS_FN_POWER_OFF), 2, 1, NULL, -1, -1));
for (;;);
}
/* Must be in the RMO region, so we place it here */
static char rtas_os_term_buf[2048];
-static s32 ibm_os_term_token = RTAS_UNKNOWN_SERVICE;
+static bool ibm_extended_os_term;
void rtas_os_term(char *str)
{
+ s32 token = rtas_function_token(RTAS_FN_IBM_OS_TERM);
int status;
/*
@@ -1563,7 +1568,8 @@ void rtas_os_term(char *str)
* this property may terminate the partition which we want to avoid
* since it interferes with panic_timeout.
*/
- if (ibm_os_term_token == RTAS_UNKNOWN_SERVICE)
+
+ if (token == RTAS_UNKNOWN_SERVICE || !ibm_extended_os_term)
return;
snprintf(rtas_os_term_buf, 2048, "OS panic: %s", str);
@@ -1574,8 +1580,7 @@ void rtas_os_term(char *str)
* schedules.
*/
do {
- status = rtas_call(ibm_os_term_token, 1, 1, NULL,
- __pa(rtas_os_term_buf));
+ status = rtas_call(token, 1, 1, NULL, __pa(rtas_os_term_buf));
} while (rtas_busy_delay_time(status));
if (status != 0)
@@ -1595,10 +1600,9 @@ void rtas_os_term(char *str)
*/
void rtas_activate_firmware(void)
{
- int token;
+ int token = rtas_function_token(RTAS_FN_IBM_ACTIVATE_FIRMWARE);
int fwrc;
- token = rtas_token("ibm,activate-firmware");
if (token == RTAS_UNKNOWN_SERVICE) {
pr_notice("ibm,activate-firmware method unavailable\n");
return;
@@ -1684,6 +1688,8 @@ static bool block_rtas_call(int token, int nargs,
{
const struct rtas_function *func;
const struct rtas_filter *f;
+ const bool is_platform_dump = token == rtas_function_token(RTAS_FN_IBM_PLATFORM_DUMP);
+ const bool is_config_conn = token == rtas_function_token(RTAS_FN_IBM_CONFIGURE_CONNECTOR);
u32 base, size, end;
/*
@@ -1720,8 +1726,7 @@ static bool block_rtas_call(int token, int nargs,
* Special case for ibm,platform-dump - NULL buffer
* address is used to indicate end of dump processing
*/
- if (!strcmp(func->name, "ibm,platform-dump") &&
- base == 0)
+ if (is_platform_dump && base == 0)
return false;
if (!in_rmo_buf(base, end))
@@ -1742,8 +1747,7 @@ static bool block_rtas_call(int token, int nargs,
* Special case for ibm,configure-connector where the
* address can be 0
*/
- if (!strcmp(func->name, "ibm,configure-connector") &&
- base == 0)
+ if (is_config_conn && base == 0)
return false;
if (!in_rmo_buf(base, end))
@@ -1798,7 +1802,7 @@ SYSCALL_DEFINE1(rtas, struct rtas_args __user *, uargs)
if (block_rtas_call(token, nargs, &args))
return -EINVAL;
- if (token == ibm_open_errinjct_token || token == ibm_errinjct_token) {
+ if (token_is_restricted_errinjct(token)) {
int err;
err = security_locked_down(LOCKDOWN_RTAS_ERROR_INJECTION);
@@ -1807,7 +1811,7 @@ SYSCALL_DEFINE1(rtas, struct rtas_args __user *, uargs)
}
/* Need to handle ibm,suspend_me call specially */
- if (token == rtas_token("ibm,suspend-me")) {
+ if (token == rtas_function_token(RTAS_FN_IBM_SUSPEND_ME)) {
/*
* rtas_ibm_suspend_me assumes the streamid handle is in cpu
@@ -1942,11 +1946,10 @@ void __init rtas_initialize(void)
rtas_function_table_init();
/*
- * Discover these now to avoid device tree lookups in the
+ * Discover this now to avoid a device tree lookup in the
* panic path.
*/
- if (of_property_read_bool(rtas.dev, "ibm,extended-os-term"))
- ibm_os_term_token = rtas_token("ibm,os-term");
+ ibm_extended_os_term = of_property_read_bool(rtas.dev, "ibm,extended-os-term");
/* If RTAS was found, allocate the RMO buffer for it and look for
* the stop-self token if any
@@ -1961,12 +1964,6 @@ void __init rtas_initialize(void)
panic("ERROR: RTAS: Failed to allocate %lx bytes below %pa\n",
PAGE_SIZE, &rtas_region);
-#ifdef CONFIG_RTAS_ERROR_LOGGING
- rtas_last_error_token = rtas_token("rtas-last-error");
-#endif
- ibm_open_errinjct_token = rtas_token("ibm,open-errinjct");
- ibm_errinjct_token = rtas_token("ibm,errinjct");
-
rtas_work_area_reserve_arena(rtas_region);
}
@@ -2022,13 +2019,13 @@ void rtas_give_timebase(void)
raw_spin_lock_irqsave(&timebase_lock, flags);
hard_irq_disable();
- rtas_call(rtas_token("freeze-time-base"), 0, 1, NULL);
+ rtas_call(rtas_function_token(RTAS_FN_FREEZE_TIME_BASE), 0, 1, NULL);
timebase = get_tb();
raw_spin_unlock(&timebase_lock);
while (timebase)
barrier();
- rtas_call(rtas_token("thaw-time-base"), 0, 1, NULL);
+ rtas_call(rtas_function_token(RTAS_FN_THAW_TIME_BASE), 0, 1, NULL);
local_irq_restore(flags);
}
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