[PATCH] Add persistent memory support

[Baoquan He]

Kernel add E820_PRAM or E820_PMEM type for NVDIMM memory device.
Now support them in kexec too.

Signed-off-by: Baoquan He <bhe@xxxxxxxxxx>
---
 include/x86/x86-linux.h            |  2 ++
 kexec/arch/i386/crashdump-x86.c    | 10 +++++++++-
 kexec/arch/i386/kexec-x86-common.c | 10 ++++++++++
 kexec/arch/i386/x86-linux-setup.c  |  6 ++++++
 kexec/firmware_memmap.c            |  4 ++++
 kexec/kexec.h                      |  2 ++
 6 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/include/x86/x86-linux.h b/include/x86/x86-linux.h
index 50c7324..7834751 100644
--- a/include/x86/x86-linux.h
+++ b/include/x86/x86-linux.h
@@ -21,6 +21,8 @@ struct e820entry {
 #define E820_RESERVED	2
 #define E820_ACPI	3 /* usable as RAM once ACPI tables have been read */
 #define E820_NVS	4
+#define E820_PMEM       7
+#define E820_PRAM       12
 } __attribute__((packed));
 #endif
 
diff --git a/kexec/arch/i386/crashdump-x86.c b/kexec/arch/i386/crashdump-x86.c
index 82bf239..dea42d0 100644
--- a/kexec/arch/i386/crashdump-x86.c
+++ b/kexec/arch/i386/crashdump-x86.c
@@ -301,6 +301,10 @@ static int get_crash_memory_ranges(struct memory_range **range, int *ranges,
 			type = RANGE_ACPI;
 		} else if(memcmp(str,"ACPI Non-volatile Storage\n",26) == 0 ) {
 			type = RANGE_ACPI_NVS;
+		} else if(memcmp(str,"Persistent Memory (legacy)\n",27) == 0 ) {
+			type = RANGE_PRAM;
+		} else if(memcmp(str,"Persistent Memory\n",18) == 0 ) {
+			type = RANGE_PMEM;
 		} else if(memcmp(str,"reserved\n",9) == 0 ) {
 			type = RANGE_RESERVED;
 		} else if (memcmp(str, "GART\n", 5) == 0) {
@@ -640,6 +644,8 @@ static void cmdline_add_memmap_internal(char *cmdline, unsigned long startk,
 		strcat (str_mmap, "K$");
 	else if (type == RANGE_ACPI || type == RANGE_ACPI_NVS)
 		strcat (str_mmap, "K#");
+	else if (type == RANGE_PMEM || type == RANGE_PRAM)
+		strcat (str_mmap, "K!");
 
 	ultoa(startk, str_tmp);
 	strcat (str_mmap, str_tmp);
@@ -997,7 +1003,9 @@ int load_crashdump_segments(struct kexec_info *info, char* mod_cmdline,
 		unsigned long start, end, size, type;
 		if ( !( mem_range[i].type == RANGE_ACPI
 			|| mem_range[i].type == RANGE_ACPI_NVS
-			|| mem_range[i].type == RANGE_RESERVED))
+			|| mem_range[i].type == RANGE_RESERVED
+			|| mem_range[i].type == RANGE_PMEM
+			|| mem_range[i].type == RANGE_PRAM))
 			continue;
 		start = mem_range[i].start;
 		end = mem_range[i].end;
diff --git a/kexec/arch/i386/kexec-x86-common.c b/kexec/arch/i386/kexec-x86-common.c
index 3624192..90534a8 100644
--- a/kexec/arch/i386/kexec-x86-common.c
+++ b/kexec/arch/i386/kexec-x86-common.c
@@ -94,6 +94,12 @@ static int get_memory_ranges_proc_iomem(struct memory_range **range, int *ranges
 		else if (memcmp(str, "ACPI Non-volatile Storage\n", 26) == 0) {
 			type = RANGE_ACPI_NVS;
 		}
+		else if (memcmp(str, "Persistent Memory (legacy)\n", 27) == 0) {
+			type = RANGE_ACPI_NVS;
+		}
+		else if (memcmp(str, "Persistent Memory\n", 18) == 0) {
+			type = RANGE_ACPI_NVS;
+		}
 		else {
 			continue;
 		}
@@ -149,6 +155,10 @@ unsigned xen_e820_to_kexec_type(uint32_t type)
 			return RANGE_ACPI;
 		case E820_NVS:
 			return RANGE_ACPI_NVS;
+		case E820_PMEM:
+			return RANGE_PMEM;
+		case E820_PRAM:
+			return RANGE_PRAM;
 		case E820_RESERVED:
 		default:
 			return RANGE_RESERVED;
diff --git a/kexec/arch/i386/x86-linux-setup.c b/kexec/arch/i386/x86-linux-setup.c
index 9271c6c..c75adaa 100644
--- a/kexec/arch/i386/x86-linux-setup.c
+++ b/kexec/arch/i386/x86-linux-setup.c
@@ -705,6 +705,12 @@ static void add_e820_map_from_mr(struct x86_linux_param_header *real_mode,
 			case RANGE_ACPI_NVS:
 				e820[i].type = E820_NVS;
 				break;
+			case RANGE_PMEM:
+				e820[i].type = E820_PMEM;
+				break;
+			case RANGE_PRAM:
+				e820[i].type = E820_PRAM;
+				break;
 			default:
 			case RANGE_RESERVED:
 				e820[i].type = E820_RESERVED;
diff --git a/kexec/firmware_memmap.c b/kexec/firmware_memmap.c
index 6be3c7c..4d84f00 100644
--- a/kexec/firmware_memmap.c
+++ b/kexec/firmware_memmap.c
@@ -168,6 +168,10 @@ static int parse_memmap_entry(const char *entry, struct memory_range *range)
 		range->type = RANGE_ACPI_NVS;
 	else if (strcmp(type, "Uncached RAM") == 0)
 		range->type = RANGE_UNCACHED;
+	else if (strcmp(type, "Persistent Memory (legacy)") == 0)
+		range->type = RANGE_PRAM;
+	else if (strcmp(type, "Persistent Memory") == 0)
+		range->type = RANGE_PMEM;
 	else {
 		fprintf(stderr, "Unknown type (%s) while parsing %s. Please "
 			"report this as bug. Using RANGE_RESERVED now.\n",
diff --git a/kexec/kexec.h b/kexec/kexec.h
index b129c15..0fa977f 100644
--- a/kexec/kexec.h
+++ b/kexec/kexec.h
@@ -136,6 +136,8 @@ struct memory_range {
 #define RANGE_ACPI	2
 #define RANGE_ACPI_NVS	3
 #define RANGE_UNCACHED	4
+#define RANGE_PMEM		6
+#define RANGE_PRAM		11
 };
 
 struct memory_ranges {
-- 
2.1.0

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