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authorAnton Blanchard <anton@samba.org>2013-11-20 22:14:59 +1100
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-11-21 09:19:16 +1100
commite844b1eeae42dc93bf13e67812a95ee7b58be8c7 (patch)
tree7c36d37d883ed5ec6b386277c38e20d9485fdaca /arch/powerpc/include/asm/plpar_wrappers.h
parentb91da2d4ce896c324bdbf1a078dbbe2db9a35ef1 (diff)
downloadlinux-e844b1eeae42dc93bf13e67812a95ee7b58be8c7.tar.bz2
pseries: Add H_SET_MODE to change exception endianness
On little endian builds call H_SET_MODE so exceptions have the correct endianness. We need to reset the endian during kexec so do that in the MMU hashtable clear callback. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm/plpar_wrappers.h')
-rw-r--r--arch/powerpc/include/asm/plpar_wrappers.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/plpar_wrappers.h b/arch/powerpc/include/asm/plpar_wrappers.h
index a63b045e707c..12c32c5f533d 100644
--- a/arch/powerpc/include/asm/plpar_wrappers.h
+++ b/arch/powerpc/include/asm/plpar_wrappers.h
@@ -287,6 +287,32 @@ static inline long disable_reloc_on_exceptions(void) {
return plpar_set_mode(0, 3, 0, 0);
}
+/*
+ * Take exceptions in big endian mode on this partition
+ *
+ * Note: this call has a partition wide scope and can take a while to complete.
+ * If it returns H_LONG_BUSY_* it should be retried periodically until it
+ * returns H_SUCCESS.
+ */
+static inline long enable_big_endian_exceptions(void)
+{
+ /* mflags = 0: big endian exceptions */
+ return plpar_set_mode(0, 4, 0, 0);
+}
+
+/*
+ * Take exceptions in little endian mode on this partition
+ *
+ * Note: this call has a partition wide scope and can take a while to complete.
+ * If it returns H_LONG_BUSY_* it should be retried periodically until it
+ * returns H_SUCCESS.
+ */
+static inline long enable_little_endian_exceptions(void)
+{
+ /* mflags = 1: little endian exceptions */
+ return plpar_set_mode(1, 4, 0, 0);
+}
+
static inline long plapr_set_ciabr(unsigned long ciabr)
{
return plpar_set_mode(0, 1, ciabr, 0);