diff options
| author | Dave Young <dyoung@redhat.com> | 2013-12-20 10:02:19 (GMT) |
|---|---|---|
| committer | Matt Fleming <matt.fleming@intel.com> | 2013-12-29 13:09:05 (GMT) |
| commit | 1fec0533693cd74f2d1a46edd29449cfee429df0 (patch) | |
| tree | a8061175bda3cda7a3a651a2925b9fb16a6c9912 /arch/x86/include/asm | |
| parent | 926172d46038d7610b6b8d84e40db727cefb482d (diff) | |
| download | linux-1fec0533693cd74f2d1a46edd29449cfee429df0.tar.xz | |
x86/efi: Pass necessary EFI data for kexec via setup_data
Add a new setup_data type SETUP_EFI for kexec use. Passing the saved
fw_vendor, runtime, config tables and EFI runtime mappings.
When entering virtual mode, directly mapping the EFI runtime regions
which we passed in previously. And skip the step to call
SetVirtualAddressMap().
Specially for HP z420 workstation we need save the smbios physical
address. The kernel boot sequence proceeds in the following order.
Step 2 requires efi.smbios to be the physical address. However, I found
that on HP z420 EFI system table has a virtual address of SMBIOS in step
1. Hence, we need set it back to the physical address with the smbios
in efi_setup_data. (When it is still the physical address, it simply
sets the same value.)
1. efi_init() - Set efi.smbios from EFI system table
2. dmi_scan_machine() - Temporary map efi.smbios to access SMBIOS table
3. efi_enter_virtual_mode() - Map EFI ranges
Tested on ovmf+qemu, lenovo thinkpad, a dell laptop and an
HP z420 workstation.
Signed-off-by: Dave Young <dyoung@redhat.com>
Tested-by: Toshi Kani <toshi.kani@hp.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Diffstat (limited to 'arch/x86/include/asm')
| -rw-r--r-- | arch/x86/include/asm/efi.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h index 9fbaeb2..4d1ba80 100644 --- a/arch/x86/include/asm/efi.h +++ b/arch/x86/include/asm/efi.h @@ -133,6 +133,18 @@ extern void efi_sync_low_kernel_mappings(void); extern void efi_setup_page_tables(void); extern void __init old_map_region(efi_memory_desc_t *md); +struct efi_setup_data { + u64 fw_vendor; + u64 runtime; + u64 tables; + u64 smbios; + u64 reserved[8]; +}; + +extern u64 efi_setup; +extern u32 efi_data_len; +extern void parse_efi_setup(u64 phys_addr, u32 data_len); + #ifdef CONFIG_EFI static inline bool efi_is_native(void) |