[PATCH v6 22/36] powernv/fadump: handle invalidation of crashdump and re-registraion

[Hari Bathini]

Make OPAL call to indicate that the dump is processed and the metadata
area in OPAL can be cleared/released. Also, setup/initialize FADump
for re-registration.

Signed-off-by: Hari Bathini <hbathini at linux.ibm.com>
---

* No major changes in v6.


 arch/powerpc/kernel/fadump.c                 |    8 +++++++-
 arch/powerpc/platforms/powernv/opal-fadump.c |   12 +++++++++++-
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
index aab9b4d..852ac47 100644
--- a/arch/powerpc/kernel/fadump.c
+++ b/arch/powerpc/kernel/fadump.c
@@ -1063,7 +1063,13 @@ static void fadump_invalidate_release_mem(void)
 	fadump_release_memory(fw_dump.boot_memory_size, memblock_end_of_DRAM());
 	fadump_free_cpu_notes_buf();
 
-	/* Initialize the kernel dump memory structure for FAD registration. */
+	/*
+	 * Setup kernel metadata and initialize the kernel dump
+	 * memory structure for FADump re-registration.
+	 */
+	if (fw_dump.ops->fadump_setup_metadata &&
+	    (fw_dump.ops->fadump_setup_metadata(&fw_dump) < 0))
+		pr_warn("Failed to setup kernel metadata!\n");
 	fw_dump.ops->fadump_init_mem_struct(&fw_dump);
 }
 
diff --git a/arch/powerpc/platforms/powernv/opal-fadump.c b/arch/powerpc/platforms/powernv/opal-fadump.c
index 533adae..ef6fb1f 100644
--- a/arch/powerpc/platforms/powernv/opal-fadump.c
+++ b/arch/powerpc/platforms/powernv/opal-fadump.c
@@ -254,7 +254,17 @@ static int opal_fadump_unregister(struct fw_dump *fadump_conf)
 
 static int opal_fadump_invalidate(struct fw_dump *fadump_conf)
 {
-	return -EIO;
+	s64 rc;
+
+	rc = opal_mpipl_update(OPAL_MPIPL_FREE_PRESERVED_MEMORY, 0, 0, 0);
+	if (rc) {
+		pr_err("Failed to invalidate - unexpected Error(%lld).\n", rc);
+		return -EIO;
+	}
+
+	fadump_conf->dump_active = 0;
+	opal_fdm_active = NULL;
+	return 0;
 }
 
 static void opal_fadump_cleanup(struct fw_dump *fadump_conf)