path: root/arch/x86/platform/efi/efi_32.c
diff options
authorDave Young <dyoung@redhat.com>2013-12-20 18:02:19 +0800
committerMatt Fleming <matt.fleming@intel.com>2013-12-29 13:09:05 +0000
commit1fec0533693cd74f2d1a46edd29449cfee429df0 (patch)
treea8061175bda3cda7a3a651a2925b9fb16a6c9912 /arch/x86/platform/efi/efi_32.c
parent926172d46038d7610b6b8d84e40db727cefb482d (diff)
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/platform/efi/efi_32.c')
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/platform/efi/efi_32.c b/arch/x86/platform/efi/efi_32.c
index 7b3ec6ed99af..249b183cf417 100644
--- a/arch/x86/platform/efi/efi_32.c
+++ b/arch/x86/platform/efi/efi_32.c
@@ -48,6 +48,7 @@ void __init efi_map_region(efi_memory_desc_t *md)
void __init efi_map_region_fixed(efi_memory_desc_t *md) {}
+void __init parse_efi_setup(u64 phys_addr, u32 data_len) {}
void efi_call_phys_prelog(void)