RE: [PATCH 1/1] iommuv2/amd: Enable Performance Counters On Family15h Models 10h-1Fh

From: Kinney, Steven
Date: Thu Dec 06 2012 - 12:07:44 EST

Hi Joerg,

I see your point(s). First, to the second point, I should (and will) add a check to the AMD Family/Model coupled to this change. Also, I will append the patch(es) to include the perf IOMMU PMU so that this change is put into context.

Thanks for your time and advise.

Best Regards,


-----Original Message-----
From: Joerg Roedel [mailto:joro@xxxxxxxxxx]
Sent: Thursday, December 06, 2012 4:33 AM
To: Kinney, Steven
Cc: Hiroshi DOYU; Stephen Warren; Jiri Kosina; Kukjin Kim; linux-kernel@xxxxxxxxxxxxxxx; iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx
Subject: Re: [PATCH 1/1] iommuv2/amd: Enable Performance Counters On Family 15h Models 10h-1Fh

On Tue, Dec 04, 2012 at 04:19:06PM -0600, Steven Kinney wrote:
> drivers/iommu/Kconfig | 10 +++++
> drivers/iommu/amd_iommu_init.c | 85 +++++++++++++++++++++++++++++++++++++++
> drivers/iommu/amd_iommu_types.h | 13 +++++-
> 3 files changed, 107 insertions(+), 1 deletion(-)

So first of all, this patch alone doesn't make sense. You should submit it in a patch-set that enabled IOMMUv2 performance counters for the end-user. This means together with the PMU implementation and tools support.

Further I don't see how this patch is specific to Family 15h Models 10h-1Fh as described in the subject-line.

Any comments on these two points?



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