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[98.179.76.75]) by smtp.gmail.com with ESMTPSA id t1sm6996674ile.1.2020.12.07.01.28.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Dec 2020 01:28:22 -0800 (PST) References: <20201207091920.3052-1-suravee.suthikulpanit@amd.com> User-agent: mu4e 1.4.10; emacs 27.1 From: Jerry Snitselaar To: Suravee Suthikulpanit Subject: Re: [PATCH] iommu/amd: Set DTE[IntTabLen] to represent 512 IRTEs In-reply-to: <20201207091920.3052-1-suravee.suthikulpanit@amd.com> Date: Mon, 07 Dec 2020 02:28:20 -0700 Message-ID: <87eek2rmmj.fsf@redhat.com> MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jsnitsel@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Cc: brijesh.singh@amd.com, Jon.Grimm@amd.com, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, will@kernel.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Suravee Suthikulpanit @ 2020-12-07 02:19 MST: > According to the AMD IOMMU spec, the commit 73db2fc595f3 > ("iommu/amd: Increase interrupt remapping table limit to 512 entries") > also requires the interrupt table length (IntTabLen) to be set to 9 > (power of 2) in the device table mapping entry (DTE). > > Fixes: 73db2fc595f3 ("iommu/amd: Increase interrupt remapping table limit to 512 entries") > Reported-by: Jerry Snitselaar > Signed-off-by: Suravee Suthikulpanit > --- > drivers/iommu/amd/amd_iommu_types.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/iommu/amd/amd_iommu_types.h b/drivers/iommu/amd/amd_iommu_types.h > index 89647700bab2..494b42a31b7a 100644 > --- a/drivers/iommu/amd/amd_iommu_types.h > +++ b/drivers/iommu/amd/amd_iommu_types.h > @@ -257,7 +257,7 @@ > #define DTE_IRQ_REMAP_INTCTL_MASK (0x3ULL << 60) > #define DTE_IRQ_TABLE_LEN_MASK (0xfULL << 1) > #define DTE_IRQ_REMAP_INTCTL (2ULL << 60) > -#define DTE_IRQ_TABLE_LEN (8ULL << 1) > +#define DTE_IRQ_TABLE_LEN (9ULL << 1) > #define DTE_IRQ_REMAP_ENABLE 1ULL > > #define PAGE_MODE_NONE 0x00 Reviewed-by: Jerry Snitselaar _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8AC04C4361B for ; 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[98.179.76.75]) by smtp.gmail.com with ESMTPSA id t1sm6996674ile.1.2020.12.07.01.28.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Dec 2020 01:28:22 -0800 (PST) References: <20201207091920.3052-1-suravee.suthikulpanit@amd.com> User-agent: mu4e 1.4.10; emacs 27.1 From: Jerry Snitselaar To: Suravee Suthikulpanit Cc: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, joro@8bytes.org, will@kernel.org, Jon.Grimm@amd.com, brijesh.singh@amd.com Subject: Re: [PATCH] iommu/amd: Set DTE[IntTabLen] to represent 512 IRTEs In-reply-to: <20201207091920.3052-1-suravee.suthikulpanit@amd.com> Date: Mon, 07 Dec 2020 02:28:20 -0700 Message-ID: <87eek2rmmj.fsf@redhat.com> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Suravee Suthikulpanit @ 2020-12-07 02:19 MST: > According to the AMD IOMMU spec, the commit 73db2fc595f3 > ("iommu/amd: Increase interrupt remapping table limit to 512 entries") > also requires the interrupt table length (IntTabLen) to be set to 9 > (power of 2) in the device table mapping entry (DTE). > > Fixes: 73db2fc595f3 ("iommu/amd: Increase interrupt remapping table limit to 512 entries") > Reported-by: Jerry Snitselaar > Signed-off-by: Suravee Suthikulpanit > --- > drivers/iommu/amd/amd_iommu_types.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/iommu/amd/amd_iommu_types.h b/drivers/iommu/amd/amd_iommu_types.h > index 89647700bab2..494b42a31b7a 100644 > --- a/drivers/iommu/amd/amd_iommu_types.h > +++ b/drivers/iommu/amd/amd_iommu_types.h > @@ -257,7 +257,7 @@ > #define DTE_IRQ_REMAP_INTCTL_MASK (0x3ULL << 60) > #define DTE_IRQ_TABLE_LEN_MASK (0xfULL << 1) > #define DTE_IRQ_REMAP_INTCTL (2ULL << 60) > -#define DTE_IRQ_TABLE_LEN (8ULL << 1) > +#define DTE_IRQ_TABLE_LEN (9ULL << 1) > #define DTE_IRQ_REMAP_ENABLE 1ULL > > #define PAGE_MODE_NONE 0x00 Reviewed-by: Jerry Snitselaar