linux-kernel - Re: debugctl msr

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Date:	Tue, 18 Nov 2008 23:00:56 +0100
From:	"stephane eranian" <eranian@...glemail.com>
To:	"Markus Metzger" <markus.t.metzger@...glemail.com>
Cc:	"Metzger, Markus T" <markus.t.metzger@...el.com>,
	"Ingo Molnar" <mingo@...e.hu>, "Andi Kleen" <andi@...stfloor.org>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: debugctl msr

Markus,

I think your definition for ds_cfg_64 is wrong. On Core, the PEBS
record ALWAYS includes r8-r15 even on
32 bits (zero filled). Also the DS_AREA has 9 fields, not 8.
Consequently, I think the structure should be defined
as follows:

static const struct ds_configuration ds_cfg_64 = {
        .sizeof_ds    = 8 * 9,
        .sizeof_field = 8,
        .sizeof_rec[ds_bts]   = 8 * 3,
        .sizeof_rec[ds_pebs]  = 8 * 18
};

Do you agree?

Thanks.
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