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    Subject[PATCH resend] x86, microcode_amd: Add support for CPU family specific container files

    We've decided to provide CPU family specific container files (starting
    with CPU family 15h). E.g. for family 15h we have to load
    microcode_amd_fam15h.bin instead of microcode_amd.bin

    Rationale is that starting with family 15h patch size is larger than
    2KB which was hard coded as maximum patch size in various microcode
    loaders (not just Linux).

    Container files which include patches larger than 2KB cause different
    kinds of trouble with such old patch loaders. Thus we have to ensure
    that the default container file provides only patches with size less
    than 2KB.

    Signed-off-by: Andreas Herrmann <>
    arch/x86/kernel/microcode_amd.c | 9 +++++++--
    1 files changed, 7 insertions(+), 2 deletions(-)

    diff --git a/arch/x86/kernel/microcode_amd.c b/arch/x86/kernel/microcode_amd.c
    index fe86493..d4e679a 100644
    --- a/arch/x86/kernel/microcode_amd.c
    +++ b/arch/x86/kernel/microcode_amd.c
    @@ -313,11 +313,16 @@ out:

    static enum ucode_state request_microcode_amd(int cpu, struct device *device)
    - const char *fw_name = "amd-ucode/microcode_amd.bin";
    + char fw_name[36] = "amd-ucode/microcode_amd.bin";
    const struct firmware *fw;
    enum ucode_state ret = UCODE_NFOUND;
    + struct cpuinfo_x86 *c = &cpu_data(cpu);
    + if (c->x86 >= 0x15)
    + snprintf(fw_name, sizeof(fw_name),
    + "amd-ucode/microcode_amd_fam%.2xh.bin", c->x86);

    - if (request_firmware(&fw, fw_name, device)) {
    + if (request_firmware(&fw, (const char *) fw_name, device)) {
    pr_err("failed to load file %s\n", fw_name);
    goto out;

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      Last update: 2012-01-20 17:47    [W:0.023 / U:0.284 seconds]
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