diff options
| author | Kairui Song <kasong@redhat.com> | 2019-05-24 14:23:19 +0800 |
|---|---|---|
| committer | Simon Horman <horms@verge.net.au> | 2019-05-31 11:26:04 +0200 |
| commit | cedeee0a30075030632a18e419419371ddf3fca3 (patch) | |
| tree | 7a3e4dcf3deb8aa1cc718d908912d945a39d211f /kexec/arch/i386/x86-linux-setup.c | |
| parent | 402351390f31b2db0768eef4ced375d00bff9e17 (diff) | |
x86: Introduce helpers for getting RSDP address
On x86 RSDP is fundamental for booting the machine. When second kernel
is incapable of parsing the RSDP address (eg. kexec next kernel on an EFI
system with EFI service disabled), kexec should prepare the RSDP address
for second kernel.
Introduce helpers for getting RSDP from multiple sources, including boot
params and EFI firmware.
For legacy BIOS interface, there is no better way to find the RSDP address
rather than scanning the memory region and search for it, and this will
always be done by the kernel as a fallback, so this is no need to try to
get the RSDP address for that case.
Signed-off-by: Kairui Song <kasong@redhat.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Diffstat (limited to 'kexec/arch/i386/x86-linux-setup.c')
| -rw-r--r-- | kexec/arch/i386/x86-linux-setup.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/kexec/arch/i386/x86-linux-setup.c b/kexec/arch/i386/x86-linux-setup.c index b643c8b..da5de97 100644 --- a/kexec/arch/i386/x86-linux-setup.c +++ b/kexec/arch/i386/x86-linux-setup.c @@ -123,7 +123,6 @@ void setup_linux_bootloader_parameters_high( cmdline_ptr[cmdline_len - 1] = '\0'; } -static int get_bootparam(void *buf, off_t offset, size_t size); static int setup_linux_vesafb(struct x86_linux_param_header *real_mode) { struct fb_fix_screeninfo fix; @@ -460,7 +459,7 @@ char *find_mnt_by_type(char *type) return mntdir; } -static int get_bootparam(void *buf, off_t offset, size_t size) +int get_bootparam(void *buf, off_t offset, size_t size) { int data_file; char *debugfs_mnt, *sysfs_mnt; |