lkml.org 
[lkml]   [2020]   [Apr]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 4.19 32/40] x86/microcode/AMD: Increase microcode PATCH_MAX_SIZE
    Date
    From: John Allen <john.allen@amd.com>

    commit bdf89df3c54518eed879d8fac7577fcfb220c67e upstream.

    Future AMD CPUs will have microcode patches that exceed the default 4K
    patch size. Raise our limit.

    Signed-off-by: John Allen <john.allen@amd.com>
    Signed-off-by: Borislav Petkov <bp@suse.de>
    Cc: stable@vger.kernel.org # v4.14..
    Link: https://lkml.kernel.org/r/20200409152931.GA685273@mojo.amd.com
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    arch/x86/include/asm/microcode_amd.h | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/arch/x86/include/asm/microcode_amd.h
    +++ b/arch/x86/include/asm/microcode_amd.h
    @@ -41,7 +41,7 @@ struct microcode_amd {
    unsigned int mpb[0];
    };

    -#define PATCH_MAX_SIZE PAGE_SIZE
    +#define PATCH_MAX_SIZE (3 * PAGE_SIZE)

    #ifdef CONFIG_MICROCODE_AMD
    extern void __init load_ucode_amd_bsp(unsigned int family);

    \
     
     \ /
      Last update: 2020-04-20 14:50    [W:4.077 / U:0.188 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site