Add support for E820 Soft Reserved Memory type which is used by QEMU
to expose Specific Purpose Memory (SPM) regions.

Changes:
- Define E820_SOFT_RESERVED in e820map.h
- Handle E820_SOFT_RESERVED in qemu_early_e820()

Signed-off-by: FangSheng Huang <FangSheng.Huang@amd.com>
---
 src/e820map.h     | 1 +
 src/fw/paravirt.c | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/src/e820map.h b/src/e820map.h
index 07ce16ec..a46fcc42 100644
--- a/src/e820map.h
+++ b/src/e820map.h
@@ -8,6 +8,7 @@
 #define E820_ACPI         3
 #define E820_NVS          4
 #define E820_UNUSABLE     5
+#define E820_SOFT_RESERVED  0xEFFFFFFF
 
 struct e820entry {
     u64 start;
diff --git a/src/fw/paravirt.c b/src/fw/paravirt.c
index e5d4eca0..2ec22878 100644
--- a/src/fw/paravirt.c
+++ b/src/fw/paravirt.c
@@ -768,6 +768,11 @@ static int qemu_early_e820(void)
             dprintf(1, "qemu/e820: addr 0x%016llx len 0x%016llx [reserved]\n",
                     table.address, table.length);
             break;
+        case E820_SOFT_RESERVED:
+            e820_add(table.address, table.length, table.type);
+            dprintf(1, "qemu/e820: addr 0x%016llx len 0x%016llx [soft reserved]\n",
+                    table.address, table.length);
+            break;
         case E820_RAM:
             e820_add(table.address, table.length, table.type);
             dprintf(1, "qemu/e820: addr 0x%016llx len 0x%016llx [RAM]\n",
-- 
2.34.1

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