From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: Re: [PATCH 3/3] iommu/amd: Re-enable IOMMU event log interrupt after handling. Date: Tue, 2 Apr 2013 16:50:42 +0200 Message-ID: <20130402145041.GD15687@8bytes.org> References: <1364428312-2611-1-git-send-email-suravee.suthikulpanit@amd.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <1364428312-2611-1-git-send-email-suravee.suthikulpanit-5C7GfCeVMHo@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: suravee.suthikulpanit-5C7GfCeVMHo@public.gmane.org Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: iommu@lists.linux-foundation.org On Wed, Mar 27, 2013 at 06:51:52PM -0500, suravee.suthikulpanit-5C7GfCeVMHo@public.gmane.org wrote: > From: Suravee Suthikulpanit > > Current driver does not clear the IOMMU event log interrupt bit > in the IOMMU status register after processing an interrupt. > This causes the IOMMU hardware to generate event log interrupt only once. > This has been observed in both IOMMU v1 and V2 hardware. > This patch clears the bit by writing 1 to bit 1 of the IOMMU > status register (MMIO Offset 2020h) > > Signed-off-by: Suravee Suthikulpanit Applied to x86/amd, thanks.