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authorGreg Kurz <gkurz@linux.vnet.ibm.com>2014-04-04 09:35:13 +0200
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2014-04-07 10:33:12 +1000
commita08a53ea4c97940fe83fea3eab27618ac0fb5ed1 (patch)
treea6d61d06dbf2929477e066d14eceff2ea7a5ac31 /arch/powerpc/kernel/rtasd.c
parentc59c015b6aa5bc18d01c8e482149086cafd7332a (diff)
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powerpc/le: Enable RTAS events support
The current kernel code assumes big endian and parses RTAS events all wrong. The most visible effect is that we cannot honor EPOW events, meaning, for example, we cannot shut down a guest properly from the hypervisor. This new patch is largely inspired by Nathan's work: we get rid of all the bit fields in the RTAS event structures (even the unused ones, for consistency). We also introduce endian safe accessors for the fields used by the kernel (trivial rtas_error_type() accessor added for consistency). Cc: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/rtasd.c')
-rw-r--r--arch/powerpc/kernel/rtasd.c24
1 files changed, 12 insertions, 12 deletions
diff --git a/arch/powerpc/kernel/rtasd.c b/arch/powerpc/kernel/rtasd.c
index 1130c53ad652..e736387fee6a 100644
--- a/arch/powerpc/kernel/rtasd.c
+++ b/arch/powerpc/kernel/rtasd.c
@@ -150,8 +150,8 @@ static void printk_log_rtas(char *buf, int len)
struct rtas_error_log *errlog = (struct rtas_error_log *)buf;
printk(RTAS_DEBUG "event: %d, Type: %s, Severity: %d\n",
- error_log_cnt, rtas_event_type(errlog->type),
- errlog->severity);
+ error_log_cnt, rtas_event_type(rtas_error_type(errlog)),
+ rtas_error_severity(errlog));
}
}
@@ -159,14 +159,16 @@ static int log_rtas_len(char * buf)
{
int len;
struct rtas_error_log *err;
+ uint32_t extended_log_length;
/* rtas fixed header */
len = 8;
err = (struct rtas_error_log *)buf;
- if (err->extended && err->extended_log_length) {
+ extended_log_length = rtas_error_extended_log_length(err);
+ if (rtas_error_extended(err) && extended_log_length) {
/* extended header */
- len += err->extended_log_length;
+ len += extended_log_length;
}
if (rtas_error_log_max == 0)
@@ -293,15 +295,13 @@ void prrn_schedule_update(u32 scope)
static void handle_rtas_event(const struct rtas_error_log *log)
{
- if (log->type == RTAS_TYPE_PRRN) {
- /* For PRRN Events the extended log length is used to denote
- * the scope for calling rtas update-nodes.
- */
- if (prrn_is_enabled())
- prrn_schedule_update(log->extended_log_length);
- }
+ if (rtas_error_type(log) != RTAS_TYPE_PRRN || !prrn_is_enabled())
+ return;
- return;
+ /* For PRRN Events the extended log length is used to denote
+ * the scope for calling rtas update-nodes.
+ */
+ prrn_schedule_update(rtas_error_extended_log_length(log));
}
#else