[Skiboot] [PATCH 1/2] opal-prd: Add get_prd_flags to host interfaces

[Jeremy Kerr]

We need a way to indicate behaviour changes & fixes in the prd
interface, without requiring a major version bump.

This change introduces the get_prd_flags callback, returning a
bitmask of prd-specific flags. We currently return 0.

Signed-off-by: Jeremy Kerr <jk at ozlabs.org>
---
 external/opal-prd/hostboot-interface.h | 10 +++++++++-
 external/opal-prd/opal-prd.c           |  5 +++++
 external/opal-prd/thunk.S              |  3 ++-
 3 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/external/opal-prd/hostboot-interface.h b/external/opal-prd/hostboot-interface.h
index 05fe052..7729a5b 100644
--- a/external/opal-prd/hostboot-interface.h
+++ b/external/opal-prd/hostboot-interface.h
@@ -277,8 +277,16 @@ struct host_interfaces {
 	int (*memory_error)( uint64_t i_startAddr, uint64_t i_endAddr,
 					  enum MemoryError_t i_errorType );
 
+	/**
+	 * @brief Query the prd infrastructure for interface capabilities.
+	 *
+	 * @return a bitmask containing the relevant OPAL_PRD_FLAGS_* for
+	 *	this implementation.
+	 */
+	uint64_t (*get_prd_flags)(void);
+
 	/* Reserve some space for future growth. */
-	void (*reserved[32])(void);
+	void (*reserved[31])(void);
 };
 
 struct runtime_interfaces {
diff --git a/external/opal-prd/opal-prd.c b/external/opal-prd/opal-prd.c
index 18c6e49..775d9f1 100644
--- a/external/opal-prd/opal-prd.c
+++ b/external/opal-prd/opal-prd.c
@@ -649,6 +649,11 @@ int hservice_memory_error(uint64_t i_start_addr, uint64_t i_endAddr,
 	return 0;
 }
 
+uint64_t hservice_get_prd_flags(void)
+{
+	return 0;
+}
+
 int hservices_init(struct opal_prd_ctx *ctx, void *code)
 {
 	uint64_t *s, *d;
diff --git a/external/opal-prd/thunk.S b/external/opal-prd/thunk.S
index f25afde..58e98d7 100644
--- a/external/opal-prd/thunk.S
+++ b/external/opal-prd/thunk.S
@@ -186,10 +186,11 @@ hinterface:
 	CALLBACK_THUNK(hservice_i2c_write)
 	CALLBACK_THUNK(hservice_ipmi_msg)
 	CALLBACK_THUNK(hservice_memory_error)
+	CALLBACK_THUNK(hservice_get_prd_flags)
 .globl __hinterface_pad
 __hinterface_pad:
 	/* Reserved space for future growth */
-	.space 32*8,0
+	.space 31*8,0
 .globl __hinterface_end
 __hinterface_end:
 	/* Eye catcher for debugging */
-- 
2.7.4