On Fri, May 30, 2014 at 11:20:10AM +0800, Dave Young wrote:
>
> 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: Dave Young <dyoung@xxxxxxxxxx>
Looks good to me.
Acked-by: Vivek Goyal <vgoyal@xxxxxxxxxx>
Vivek
> ---
> arch/x86/platform/efi/efi.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
> index 3781dd3..4d36932 100644
> --- a/arch/x86/platform/efi/efi.c
> +++ b/arch/x86/platform/efi/efi.c
> @@ -919,6 +919,9 @@ static void __init save_runtime_map(void)
> void *tmp, *p, *q = NULL;
> int count = 0;
>
> + if (efi_enabled(EFI_OLD_MEMMAP))
> + return;
> +
> for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
> md = p;
>
> --
> 1.8.3.1
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