diff options
| author | Borislav Petkov <bp@suse.de> | 2016-12-20 11:54:30 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2016-12-21 10:50:04 +0100 |
| commit | 8877ebdd3f9a3ffc84c4b67562d257c5f553bc49 (patch) | |
| tree | df05f341d7dcde40147e69745dcb3a2b2a80f2d8 /arch | |
| parent | 9120cf4fd9ae77245ce9137869bcbd16575cc633 (diff) | |
| download | linux-8877ebdd3f9a3ffc84c4b67562d257c5f553bc49.tar.bz2 | |
x86/microcode/AMD: Reload proper initrd start address
When we switch to virtual addresses and, especially after
reserve_initrd()->relocate_initrd() have run, we have the updated initrd
address in initrd_start. Use initrd_start then instead of the address
which has been passed to us through boot params. (That still gets used
when we're running the very early routines on the BSP).
Reported-and-tested-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/20161220144012.lc4cwrg6dphqbyqu@pd.tnic
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/cpu/microcode/core.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c index c4bb2f7169f6..2af69d27da62 100644 --- a/arch/x86/kernel/cpu/microcode/core.c +++ b/arch/x86/kernel/cpu/microcode/core.c @@ -243,14 +243,12 @@ struct cpio_data find_microcode_in_initrd(const char *path, bool use_pa) # endif /* - * Did we relocate the ramdisk? - * - * So we possibly relocate the ramdisk *after* applying microcode on the - * BSP so we rely on use_pa (use physical addresses) - even if it is not - * absolutely correct - to determine whether we've done the ramdisk - * relocation already. + * Fixup the start address: after reserve_initrd() runs, initrd_start + * has the virtual address of the beginning of the initrd. It also + * possibly relocates the ramdisk. In either case, initrd_start contains + * the updated address so use that instead. */ - if (!use_pa && relocated_ramdisk) + if (!use_pa && initrd_start) start = initrd_start; return find_cpio_data(path, (void *)start, size, NULL); |