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[34.124.234.44]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2bae755e95bsm2712105ad.25.2026.05.07.10.01.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 May 2026 10:01:19 -0700 (PDT) Date: Thu, 7 May 2026 17:01:13 +0000 From: Pranjal Shrivastava To: Yigit Oguz Cc: joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, baolu.lu@linux.intel.com, dwmw2@infradead.org, suravee.suthikulpanit@amd.com, jgg@ziepe.ca, nicolinc@nvidia.com, iommu@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Lilit Janpoladyan Subject: Re: [PATCH 1/3] iommu/arm-smmu-v3: Print PCI vendor:device ID in SMMU translation fault logs Message-ID: References: <20260506150541.60467-1-yigitogu@amazon.de> <20260506150541.60467-2-yigitogu@amazon.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20260506150541.60467-2-yigitogu@amazon.de> On Wed, May 06, 2026 at 03:05:37PM +0000, Yigit Oguz wrote: > From: Lilit Janpoladyan > > For translation, address-size, access, and permission faults, look up > the pci_dev from the event and append the PCI vendor:device ID after > the device name, e.g.: > > event: F_TRANSLATION client: 0001:02:02.4 [1d0f:8061] sid: ... > > For non-PCI devices or unassigned SIDs the output is unchanged. > > Signed-off-by: Lilit Janpoladyan > Signed-off-by: Yigit Oguz > --- > drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 29 ++++++++++++++++++--- > 1 file changed, 25 insertions(+), 4 deletions(-) > > diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c > index e8d7dbe495f0..ab1afa36965a 100644 > --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c > +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c > @@ -2213,12 +2213,30 @@ static void arm_smmu_dump_raw_event(struct arm_smmu_device *smmu, u64 *raw, > > #define ARM_SMMU_EVT_KNOWN(e) ((e)->id < ARRAY_SIZE(event_str) && event_str[(e)->id]) > #define ARM_SMMU_LOG_EVT_STR(e) ARM_SMMU_EVT_KNOWN(e) ? event_str[(e)->id] : "UNKNOWN" > -#define ARM_SMMU_LOG_CLIENT(e) (e)->dev ? dev_name((e)->dev) : "(unassigned sid)" > + > +/* "SSSS:BB:DD.F [VVVV:DDDD]\0" — 12 + 1 + 11 + 1 = 25; round to power of 2 */ > +#define ARM_SMMU_CLIENT_LEN 32 > + Nit: s/ARM_SMMU_CLIENT_LEN/ARM_SMMU_LOG_CLIENT_LEN to maintain the convention? > +static const char *arm_smmu_fmt_client(struct arm_smmu_event *e, char *buf, size_t sz) > +{ > + struct pci_dev *p; Minor nit: maybe we could intialized it here? struct pci_dev *p = to_pci_dev(e->dev); Not a strong opinion though. > + > + if (!e->dev) > + return "(unassigned sid)"; > + if (!dev_is_pci(e->dev)) > + return dev_name(e->dev); > + > + p = to_pci_dev(e->dev); > + snprintf(buf, sz, "%s [%04x:%04x]", dev_name(e->dev), p->vendor, p->device); > + return buf; > +} > > static void arm_smmu_dump_event(struct arm_smmu_device *smmu, u64 *raw, > struct arm_smmu_event *evt, > struct ratelimit_state *rs) > { > + char clientbuf[ARM_SMMU_CLIENT_LEN]; Nit: s/clientbuf/client_str ? I was able to test this with 7.1-rc1 & it looks good: [ 106.880820] arm-smmu-v3 9050000.smmuv3: event: F_TRANSLATION client: 0000:00:01.0 [8086:10c9] sid: 0x8 ssid: 0x0 iova: 0xffffc000 ipa: 0x0 [ 106.880855] arm-smmu-v3 9050000.smmuv3: unpriv data read s1 "Input address caused fault" stag: 0x0 [ 106.880894] arm-smmu-v3 9050000.smmuv3: event 0x10 received: [ 106.880922] arm-smmu-v3 9050000.smmuv3: 0x0000000800000010 [ 106.880948] arm-smmu-v3 9050000.smmuv3: 0x0000020800000000 [ 106.880974] arm-smmu-v3 9050000.smmuv3: 0x00000000ffffc004 [ 106.881001] arm-smmu-v3 9050000.smmuv3: 0x0000000000000000 [ 106.881030] arm-smmu-v3 9050000.smmuv3: event: F_TRANSLATION client: 0000:00:01.0 [8086:10c9] sid: 0x8 ssid: 0x0 iova: 0xffffc004 ipa: 0x0 [ 106.881061] arm-smmu-v3 9050000.smmuv3: unpriv data read s1 "Input address caused fault" stag: 0x0 [ 106.881104] arm-smmu-v3 9050000.smmuv3: event 0x10 received: [ 106.881136] arm-smmu-v3 9050000.smmuv3: 0x0000000800000010 [ 106.881163] arm-smmu-v3 9050000.smmuv3: 0x0000020800000000 [ 106.881189] arm-smmu-v3 9050000.smmuv3: 0x00000000ffffc008 [ 106.881215] arm-smmu-v3 9050000.smmuv3: 0x0000000000000000 Apart from the nits above: Reviewed-by: Pranjal Shrivastava Tested-by: Pranjal Shrivastava Thanks, Praan