The efi_info structure stores low 32 bits of memory map
in efi_memmap and high 32 bits in efi_memmap_hi.
While constructing pointer in the setup_e820(), need
to take into account all 64 bits of the pointer.
It is because on 64bit machine the function
efi_get_memory_map() may return full 64bit pointer and before
the patch that pointer was truncated.
Signed-off-by: Dmitry Skorodumov <sdmitry@xxxxxxxxxxxxx>
tested in Parallels virtual machine with more then 3GB of memory
---
arch/x86/boot/compressed/eboot.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c
index 2c82bd1..9108fe5 100644
--- a/arch/x86/boot/compressed/eboot.c
+++ b/arch/x86/boot/compressed/eboot.c
@@ -1184,6 +1184,12 @@ static efi_status_t setup_e820(struct boot_params *params,
u32 nr_entries;
u32 nr_desc;
int i;
+ unsigned long m;
+
+ m = efi->efi_memmap;
+#ifdef CONFIG_X86_64
+ m |= (u64)efi->efi_memmap_hi << 32;
+#endif
nr_entries = 0;
nr_desc = efi->efi_memmap_size / efi->efi_memdesc_size;
@@ -1191,7 +1197,6 @@ static efi_status_t setup_e820(struct boot_params *params,
for (i = 0; i < nr_desc; i++) {
efi_memory_desc_t *d;
unsigned int e820_type = 0;
- unsigned long m = efi->efi_memmap;
d = (efi_memory_desc_t *)(m + (i * efi->efi_memdesc_size));
switch (d->type) {
--
1.7.9.1
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