linux-kernel - Re: [PATCH 2/2] x86, microcode: Make reload interface per system

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Date:	Wed, 20 Jun 2012 11:56:16 +0200
From:	Borislav Petkov <bp@...64.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Borislav Petkov <bp@...64.org>,
	"Yu, Fenghua" <fenghua.yu@...el.com>, X86-ML <x86@...nel.org>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Andreas Herrmann <andreas.herrmann3@....com>,
	Henrique de Moraes Holschuh <hmh@....eng.br>
Subject: Re: [PATCH 2/2] x86, microcode: Make reload interface per system

On Wed, Jun 20, 2012 at 10:59:38AM +0200, Peter Zijlstra wrote:
> On Wed, 2012-06-20 at 01:28 +0200, Borislav Petkov wrote:
> > 
> > which makes me wonder whether we still need that OLD INTERFACE.
> > Henrique, any thoughts here? 
> 
> Yes I need it, I've no f'ing clue where to put the ucode image so that
> the whole firmware mess can find it :-)

On AMD:

static enum ucode_state request_microcode_amd(int cpu, struct device *device)
{
        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);
	...


On Intel:

static enum ucode_state request_microcode_fw(int cpu, struct device *device)
{
        char name[30];
        struct cpuinfo_x86 *c = &cpu_data(cpu);
        const struct firmware *firmware;
        enum ucode_state ret;

        sprintf(name, "intel-ucode/%02x-%02x-%02x",
                c->x86, c->x86_model, c->x86_mask);

	...

And that's all under /lib/firmware/

Phew, now that Peter is converted, we can kill the old interface too :-)

-- 
Regards/Gruss,
Boris.

Advanced Micro Devices GmbH
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