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    Subject[PATCH 10/11] x86/mm/init.c: Copy ucode from initrd image to memory
    Date
    From: Fenghua Yu <fenghua.yu@intel.com>

    Before initrd image is freed, copy valid ucode patches from initrd image
    to kernel virtual memory. The saved ucode will be used to update AP in resume.

    Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
    ---
    arch/x86/mm/init.c | 10 ++++++++++
    1 files changed, 10 insertions(+), 0 deletions(-)

    diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
    index e0e6990..58ceb82 100644
    --- a/arch/x86/mm/init.c
    +++ b/arch/x86/mm/init.c
    @@ -16,6 +16,7 @@
    #include <asm/tlb.h>
    #include <asm/proto.h>
    #include <asm/dma.h> /* for MAX_DMA_PFN */
    +#include <asm/microcode.h>

    unsigned long __initdata pgt_buf_start;
    unsigned long __meminitdata pgt_buf_end;
    @@ -387,6 +388,15 @@ void free_initmem(void)
    #ifdef CONFIG_BLK_DEV_INITRD
    void __init free_initrd_mem(unsigned long start, unsigned long end)
    {
    +#ifdef CONFIG_MICROCODE_EARLY
    + /*
    + * Remember, initrd memory may contain microcode or other useful things.
    + * Before we lose initrd mem, we need to find a place to hold them
    + * now that normal virtual memory is enabled.
    + */
    + save_microcode_in_initrd(&mc_saved_data, mc_saved_in_initrd);
    +#endif
    +
    /*
    * end could be not aligned, and We can not align that,
    * decompresser could be confused by aligned initrd_end
    --
    1.7.2


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