4 files changed, 25 insertions, 68 deletions

diff --git a/arch/powerpc/platforms/cell/pervasive.c b/arch/powerpc/platforms/cell/pervasive.c
index efdacc82957..d17e98bc0c1 100644
--- a/arch/powerpc/platforms/cell/pervasive.c
+++ b/arch/powerpc/platforms/cell/pervasive.c
@@ -42,11 +42,9 @@ static void cbe_power_save(void)
 {
 	unsigned long ctrl, thread_switch_control;
 
-	/*
-	 * We need to hard disable interrupts, the local_irq_enable() done by
-	 * our caller upon return will hard re-enable.
-	 */
-	hard_irq_disable();
+	/* Ensure our interrupt state is properly tracked */
+	if (!prep_irq_for_idle())
+		return;
 
 	ctrl = mfspr(SPRN_CTRLF);
 
@@ -81,6 +79,9 @@ static void cbe_power_save(void)
 	 */
 	ctrl &= ~(CTRL_RUNLATCH | CTRL_TE);
 	mtspr(SPRN_CTRLT, ctrl);
+
+	/* Re-enable interrupts in MSR */
+	__hard_irq_enable();
 }
 
 static int cbe_system_reset_exception(struct pt_regs *regs)
diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c
index 0915b1ad66c..2d311c0caf8 100644
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -106,7 +106,7 @@ static int tce_build_pSeries(struct iommu_table *tbl, long index,
 		tcep++;
 	}
 
-	if (tbl->it_type == TCE_PCI_SWINV_CREATE)
+	if (tbl->it_type & TCE_PCI_SWINV_CREATE)
 		tce_invalidate_pSeries_sw(tbl, tces, tcep - 1);
 	return 0;
 }
@@ -121,7 +121,7 @@ static void tce_free_pSeries(struct iommu_table *tbl, long index, long npages)
 	while (npages--)
 		*(tcep++) = 0;
 
-	if (tbl->it_type == TCE_PCI_SWINV_FREE)
+	if (tbl->it_type & TCE_PCI_SWINV_FREE)
 		tce_invalidate_pSeries_sw(tbl, tces, tcep - 1);
 }
 
diff --git a/arch/powerpc/platforms/pseries/nvram.c b/arch/powerpc/platforms/pseries/nvram.c
index 36f957f3184..8733a86ad52 100644
--- a/arch/powerpc/platforms/pseries/nvram.c
+++ b/arch/powerpc/platforms/pseries/nvram.c
@@ -68,9 +68,7 @@ static const char *pseries_nvram_os_partitions[] = {
 };
 
 static void oops_to_nvram(struct kmsg_dumper *dumper,
-		enum kmsg_dump_reason reason,
-		const char *old_msgs, unsigned long old_len,
-		const char *new_msgs, unsigned long new_len);
+			  enum kmsg_dump_reason reason);
 
 static struct kmsg_dumper nvram_kmsg_dumper = {
 	.dump = oops_to_nvram
@@ -504,28 +502,6 @@ int __init pSeries_nvram_init(void)
 }
 
 /*
- * Try to capture the last capture_len bytes of the printk buffer.  Return
- * the amount actually captured.
- */
-static size_t capture_last_msgs(const char *old_msgs, size_t old_len,
-				const char *new_msgs, size_t new_len,
-				char *captured, size_t capture_len)
-{
-	if (new_len >= capture_len) {
-		memcpy(captured, new_msgs + (new_len - capture_len),
-								capture_len);
-		return capture_len;
-	} else {
-		/* Grab the end of old_msgs. */
-		size_t old_tail_len = min(old_len, capture_len - new_len);
-		memcpy(captured, old_msgs + (old_len - old_tail_len),
-								old_tail_len);
-		memcpy(captured + old_tail_len, new_msgs, new_len);
-		return old_tail_len + new_len;
-	}
-}
-
-/*
  * Are we using the ibm,rtas-log for oops/panic reports?  And if so,
  * would logging this oops/panic overwrite an RTAS event that rtas_errd
  * hasn't had a chance to read and process?  Return 1 if so, else 0.
@@ -541,27 +517,6 @@ static int clobbering_unread_rtas_event(void)
 						NVRAM_RTAS_READ_TIMEOUT);
 }
 
-/* Squeeze out each line's <n> severity prefix. */
-static size_t elide_severities(char *buf, size_t len)
-{
-	char *in, *out, *buf_end = buf + len;
-	/* Assume a <n> at the very beginning marks the start of a line. */
-	int newline = 1;
-
-	in = out = buf;
-	while (in < buf_end) {
-		if (newline && in+3 <= buf_end &&
-				*in == '<' && isdigit(in[1]) && in[2] == '>') {
-			in += 3;
-			newline = 0;
-		} else {
-			newline = (*in == '\n');
-			*out++ = *in++;
-		}
-	}
-	return out - buf;
-}
-
 /* Derived from logfs_compress() */
 static int nvram_compress(const void *in, void *out, size_t inlen,
 							size_t outlen)
@@ -619,9 +574,7 @@ static int zip_oops(size_t text_len)
  * partition.  If that's too much, go back and capture uncompressed text.
  */
 static void oops_to_nvram(struct kmsg_dumper *dumper,
-		enum kmsg_dump_reason reason,
-		const char *old_msgs, unsigned long old_len,
-		const char *new_msgs, unsigned long new_len)
+			  enum kmsg_dump_reason reason)
 {
 	static unsigned int oops_count = 0;
 	static bool panicking = false;
@@ -660,14 +613,14 @@ static void oops_to_nvram(struct kmsg_dumper *dumper,
 		return;
 
 	if (big_oops_buf) {
-		text_len = capture_last_msgs(old_msgs, old_len,
-			new_msgs, new_len, big_oops_buf, big_oops_buf_sz);
-		text_len = elide_severities(big_oops_buf, text_len);
+		kmsg_dump_get_buffer(dumper, false,
+				     big_oops_buf, big_oops_buf_sz, &text_len);
 		rc = zip_oops(text_len);
 	}
 	if (rc != 0) {
-		text_len = capture_last_msgs(old_msgs, old_len,
-				new_msgs, new_len, oops_data, oops_data_sz);
+		kmsg_dump_rewind(dumper);
+		kmsg_dump_get_buffer(dumper, true,
+				     oops_data, oops_data_sz, &text_len);
 		err_type = ERR_TYPE_KERNEL_PANIC;
 		*oops_len = (u16) text_len;
 	}
diff --git a/arch/powerpc/platforms/pseries/processor_idle.c b/arch/powerpc/platforms/pseries/processor_idle.c
index 41a34bc4a9a..c71be66bd5d 100644
--- a/arch/powerpc/platforms/pseries/processor_idle.c
+++ b/arch/powerpc/platforms/pseries/processor_idle.c
@@ -99,15 +99,18 @@ out:
 static void check_and_cede_processor(void)
 {
 	/*
-	 * Interrupts are soft-disabled at this point,
-	 * but not hard disabled. So an interrupt might have
-	 * occurred before entering NAP, and would be potentially
-	 * lost (edge events, decrementer events, etc...) unless
-	 * we first hard disable then check.
+	 * Ensure our interrupt state is properly tracked,
+	 * also checks if no interrupt has occurred while we
+	 * were soft-disabled
 	 */
-	hard_irq_disable();
-	if (get_paca()->irq_happened == 0)
+	if (prep_irq_for_idle()) {
 		cede_processor();
+#ifdef CONFIG_TRACE_IRQFLAGS
+		/* Ensure that H_CEDE returns with IRQs on */
+		if (WARN_ON(!(mfmsr() & MSR_EE)))
+			__hard_irq_enable();
+#endif
+	}
 }
 
 static int dedicated_cede_loop(struct cpuidle_device *dev,