[Skiboot] [PATCH v2 09/12] hdat: Parse hostboot memory reservations from HDAT

[Vasant Hegde]

Hostboot reserves some memory and passes via HDAT. This patch
adds code to parse node reservation details and marks it as
REGION_HW_RESERVED. Later mem_region_add_dt_reserved() populates
DT entry.

Signed-off-by: Vasant Hegde <hegdevasant at linux.vnet.ibm.com>
---
 hdata/memory.c     | 38 ++++++++++++++++++++++++++++++++++++++
 hdata/test/stubs.c |  1 +
 2 files changed, 39 insertions(+)

diff --git a/hdata/memory.c b/hdata/memory.c
index a8b9955..aade3be 100644
--- a/hdata/memory.c
+++ b/hdata/memory.c
@@ -19,6 +19,7 @@
 #include <vpd.h>
 #include <ccan/str/str.h>
 #include <libfdt/libfdt.h>
+#include <mem_region.h>
 #include <types.h>
 
 #include "spira.h"
@@ -383,6 +384,41 @@ static void get_msareas(struct dt_node *root,
 	}
 }
 
+static void get_hb_reserved_mem(struct HDIF_common_hdr *ms_vpd)
+{
+	char *label;
+	int count, i;
+	uint64_t len;
+	const struct msvpd_hb_reserved_mem *hb_resv_mem;
+
+	if (proc_gen < proc_gen_p9)
+		return;
+
+	count = HDIF_get_iarray_size(ms_vpd, MSVPD_IDATA_HB_RESERVED_MEM);
+	if (count <= 0) {
+		prerror("MS VPD: No hostboot reserved memory found\n");
+		return;
+	}
+
+	for (i = 0; i < count; i++) {
+		hb_resv_mem = HDIF_get_iarray_item(ms_vpd,
+						   MSVPD_IDATA_HB_RESERVED_MEM,
+						   i, NULL);
+		if (!CHECK_SPPTR(hb_resv_mem))
+			continue;
+
+		label = zalloc(be32_to_cpu(hb_resv_mem->label_size) + 1);
+		assert(label);
+		memcpy(label, hb_resv_mem->label,
+		       be32_to_cpu(hb_resv_mem->label_size));
+		len = be64_to_cpu(hb_resv_mem->end_addr) -
+			be64_to_cpu(hb_resv_mem->start_addr);
+		mem_reserve_hw(label,
+			       be64_to_cpu(hb_resv_mem->start_addr), len);
+		free(label);
+	}
+}
+
 static bool __memory_parse(struct dt_node *root)
 {
 	struct HDIF_common_hdr *ms_vpd;
@@ -431,6 +467,8 @@ static bool __memory_parse(struct dt_node *root)
 
 	get_msareas(root, ms_vpd);
 
+	get_hb_reserved_mem(ms_vpd);
+
 	prlog(PR_INFO, "MS VPD: Total MB of RAM: 0x%llx\n",
 	       (long long)be64_to_cpu(tcms->total_in_mb));
 
diff --git a/hdata/test/stubs.c b/hdata/test/stubs.c
index 9687b31..735813f 100644
--- a/hdata/test/stubs.c
+++ b/hdata/test/stubs.c
@@ -49,3 +49,4 @@ STUB(op_display);
 STUB(fsp_preload_lid);
 STUB(fsp_wait_lid_loaded);
 STUB(fsp_adjust_lid_side);
+STUB(mem_reserve_hw);
-- 
2.5.5