Commit a3530e8f authored by Dave Young's avatar Dave Young Committed by Matt Fleming

x86/efi: Do not export efi runtime map in case old map

For ioremapped efi memory aka old_map the virt addresses are not persistant
across kexec reboot. kexec-tools will read the runtime maps from sysfs then
pass them to 2nd kernel and assuming kexec efi boot is ok. This will cause
kexec boot failure.

To address this issue do not export runtime maps in case efi old_map so
userspace can use no efi boot instead.
Signed-off-by: default avatarDave Young <dyoung@redhat.com>
Acked-by: default avatarBorislav Petkov <bp@suse.de>
Acked-by: default avatarVivek Goyal <vgoyal@redhat.com>
Signed-off-by: default avatarMatt Fleming <matt.fleming@intel.com>
parent 34f51147
...@@ -919,6 +919,9 @@ static void __init save_runtime_map(void) ...@@ -919,6 +919,9 @@ static void __init save_runtime_map(void)
void *tmp, *p, *q = NULL; void *tmp, *p, *q = NULL;
int count = 0; int count = 0;
if (efi_enabled(EFI_OLD_MEMMAP))
return;
for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
md = p; md = p;
......
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