On Thu, 26 Jun, at 04:33:44PM, Vivek Goyal wrote:
> This patch does two thigns. It passes EFI run time mappings to second
> kernel in bootparams efi_info. Second kernel parse this info and create
> new mappings in second kernel. That means mappings in first and second
> kernel will be same. This paves the way to enable EFI in kexec kernel.
>
> This patch also prepares and passes EFI setup data through bootparams.
> This contains bunch of information about various tables and their
> addresses.
>
> These information gathering and passing has been written along the lines
> of what current kexec-tools is doing to make kexec work with UEFI.
>
> Signed-off-by: Vivek Goyal <vgoyal at redhat.com>
> CC: linux-efi at vger.kernel.org
> ---
> arch/x86/kernel/kexec-bzimage64.c | 146 ++++++++++++++++++++++++++++++++++---
> drivers/firmware/efi/runtime-map.c | 21 ++++++
> include/linux/efi.h | 19 +++++
> 3 files changed, 174 insertions(+), 12 deletions(-)
[...]
> diff --git a/drivers/firmware/efi/runtime-map.c b/drivers/firmware/efi/runtime-map.c
> index 97cdd16..40f2213 100644
> --- a/drivers/firmware/efi/runtime-map.c
> +++ b/drivers/firmware/efi/runtime-map.c
> @@ -138,6 +138,27 @@ add_sysfs_runtime_map_entry(struct kobject *kobj, int nr)
> return entry;
> }
>
> +int get_efi_runtime_map_size(void)
> +{
> + return nr_efi_runtime_map * efi_memdesc_size;
> +}
> +
> +int get_efi_runtime_map_desc_size(void)
> +{
> + return efi_memdesc_size;
> +}
> +
> +int efi_runtime_map_copy(void *buf, size_t bufsz)
> +{
> + size_t sz = get_efi_runtime_map_size();
> +
> + if (sz > bufsz)
> + sz = bufsz;
> +
> + memcpy(buf, efi_runtime_map, sz);
> + return 0;
> +}
Could we prefix these with efi_, e.g. efi_get_runtime_map_size() ?
--
Matt Fleming, Intel Open Source Technology Center
