From: Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
To: suravee.suthikulpanit-5C7GfCeVMHo@public.gmane.org
Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
jay.cornwall-5C7GfCeVMHo@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
kim.naru-5C7GfCeVMHo@public.gmane.org
Subject: Re: [PATCH V2] iommu/amd: Fix logic to determine and checking max PASID
Date: Mon, 24 Mar 2014 16:48:06 +0100 [thread overview]
Message-ID: <20140324154806.GB2775@8bytes.org> (raw)
In-Reply-To: <1394067258-5968-1-git-send-email-suravee.suthikulpanit-5C7GfCeVMHo@public.gmane.org>
On Wed, Mar 05, 2014 at 06:54:18PM -0600, suravee.suthikulpanit-5C7GfCeVMHo@public.gmane.org wrote:
> From: Suravee Suthikulpanit <suravee.suthikulpanit-5C7GfCeVMHo@public.gmane.org>
>
> In reality, the spec can only support 16-bit PASID since
> INVALIDATE_IOTLB_PAGES and COMPLETE_PPR_REQUEST commands only allow 16-bit
> PASID. So, we updated the PASID_MASK accordingly and invoke BUG_ON
> if the hardware is reporting PASmax more than 16-bit.
>
> Besides, max PASID is defined as ((2^(PASmax+1)) - 1). The current does not
> determine this correctly.
>
> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit-5C7GfCeVMHo@public.gmane.org>
> Tested-by: Jay Cornwall <Jay.Cornwall-5C7GfCeVMHo@public.gmane.org>
Applied, thanks.
Btw, is there any publicly available driver/way/whatever for me to test the
AMD IOMMUv2 code paths?
Joerg
WARNING: multiple messages have this Message-ID (diff)
From: Joerg Roedel <joro@8bytes.org>
To: suravee.suthikulpanit@amd.com
Cc: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
kim.naru@amd.com, jay.cornwall@amd.com
Subject: Re: [PATCH V2] iommu/amd: Fix logic to determine and checking max PASID
Date: Mon, 24 Mar 2014 16:48:06 +0100 [thread overview]
Message-ID: <20140324154806.GB2775@8bytes.org> (raw)
In-Reply-To: <1394067258-5968-1-git-send-email-suravee.suthikulpanit@amd.com>
On Wed, Mar 05, 2014 at 06:54:18PM -0600, suravee.suthikulpanit@amd.com wrote:
> From: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
>
> In reality, the spec can only support 16-bit PASID since
> INVALIDATE_IOTLB_PAGES and COMPLETE_PPR_REQUEST commands only allow 16-bit
> PASID. So, we updated the PASID_MASK accordingly and invoke BUG_ON
> if the hardware is reporting PASmax more than 16-bit.
>
> Besides, max PASID is defined as ((2^(PASmax+1)) - 1). The current does not
> determine this correctly.
>
> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
> Tested-by: Jay Cornwall <Jay.Cornwall@amd.com>
Applied, thanks.
Btw, is there any publicly available driver/way/whatever for me to test the
AMD IOMMUv2 code paths?
Joerg
next prev parent reply other threads:[~2014-03-24 15:48 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-06 0:54 [PATCH V2] iommu/amd: Fix logic to determine and checking max PASID suravee.suthikulpanit-5C7GfCeVMHo
2014-03-06 0:54 ` suravee.suthikulpanit
[not found] ` <1394067258-5968-1-git-send-email-suravee.suthikulpanit-5C7GfCeVMHo@public.gmane.org>
2014-03-21 19:07 ` Suravee Suthikulpanit
2014-03-21 19:07 ` Suravee Suthikulpanit
2014-03-24 15:48 ` Joerg Roedel [this message]
2014-03-24 15:48 ` Joerg Roedel
2014-03-24 19:33 ` Cornwall, Jay
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