Resend: [PATCH 7/8] powerpc: Check arch.vec earlier during boot for memory features

From: Michael Bringmann <hidden>
Date: 2016-07-27 14:23:43

architecture.vec5 features: The boot-time memory management needs to
know the form of the "ibm,dynamic-memory-v2" property early during
scanning of the flattened device tree.  This patch moves execution of
the function pseries_probe_fw_features() early enough to be before
the scanning of the memory properties in the device tree to allow
recognition of the supported properties.

Signed-off-by: Michael Bringmann <redacted>
---

diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
index 9d86c66..e4c5076 100644
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h

@@ -215,6 +215,8 @@ extern int early_init_dt_scan_opal(unsigned long node, const char *uname,
 				   int depth, void *data);
 extern int early_init_dt_scan_recoverable_ranges(unsigned long node,
 				 const char *uname, int depth, void *data);
+extern int pseries_probe_fw_features(unsigned long node,
+				 const char *uname, int depth, void *data);
 
 extern int opal_get_chars(uint32_t vtermno, char *buf, int count);
 extern int opal_put_chars(uint32_t vtermno, const char *buf, int total_len);

diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 946e34f..2034edc 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c

@@ -777,6 +777,7 @@ void __init early_init_devtree(void *params)
 	of_scan_flat_dt(early_init_dt_scan_chosen_ppc, boot_command_line);
 
 	/* Scan memory nodes and rebuild MEMBLOCKs */
+	of_scan_flat_dt(pseries_probe_fw_features, NULL);
 	of_scan_flat_dt(early_init_dt_scan_root, NULL);
 	of_scan_flat_dt(early_init_dt_scan_memory_ppc, NULL);

diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index 9883bc7..f554205 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c

@@ -736,7 +736,7 @@ static void pseries_power_off(void)
  * Called very early, MMU is off, device-tree isn't unflattened
  */
 
-static int __init pseries_probe_fw_features(unsigned long node,
+int __init pseries_probe_fw_features(unsigned long node,
 					    const char *uname, int depth,
 					    void *data)
 {

@@ -770,6 +770,7 @@ static int __init pseries_probe_fw_features(unsigned long node,
 
 	return hypertas_found && vec5_found;
 }
+EXPORT_SYMBOL(pseries_probe_fw_features);
 
 static int __init pSeries_probe(void)
 {

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