From: Ricardo Ribalda <ribalda@chromium.org> To: "Yong Wu (吴勇)" <Yong.Wu@mediatek.com> Cc: "robin.murphy@arm.com" <robin.murphy@arm.com>, "joro@8bytes.org" <joro@8bytes.org>, "matthias.bgg@gmail.com" <matthias.bgg@gmail.com>, "will@kernel.org" <will@kernel.org>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "linux-mediatek@lists.infradead.org" <linux-mediatek@lists.infradead.org>, "iommu@lists.linux.dev" <iommu@lists.linux.dev> Subject: Re: [PATCH] iommu/mediatek: Fix crash on isr after kexec() Date: Mon, 28 Nov 2022 23:14:37 +0100 [thread overview] Message-ID: <CANiDSCv_ZBLFTp42AZz9Td_JCR0MKLooW2gtFo3woT-dOQtm8w@mail.gmail.com> (raw) In-Reply-To: <9e81fb3cc4f315f330c610dfb16bad50b7241f4c.camel@mediatek.com> Hi Yong On Mon, 28 Nov 2022 at 07:44, Yong Wu (吴勇) <Yong.Wu@mediatek.com> wrote: > > On Fri, 2022-11-25 at 17:28 +0100, Ricardo Ribalda wrote: > > If the system is rebooted via isr(), the IRQ handler might be > > triggerd > > before the domain is initialized. Resulting on an invalid memory > > access > > error. > > > > Fix: > > [ 0.500930] Unable to handle kernel read from unreadable memory at > > virtual address 0000000000000070 > > [ 0.501166] Call trace: > > [ 0.501174] report_iommu_fault+0x28/0xfc > > [ 0.501180] mtk_iommu_isr+0x10c/0x1c0 > > > > Signed-off-by: Ricardo Ribalda <ribalda@chromium.org> > > --- > > To: Yong Wu <yong.wu@mediatek.com> > > To: Joerg Roedel <joro@8bytes.org> > > To: Will Deacon <will@kernel.org> > > To: Robin Murphy <robin.murphy@arm.com> > > To: Matthias Brugger <matthias.bgg@gmail.com> > > Cc: iommu@lists.linux.dev > > Cc: linux-mediatek@lists.infradead.org > > Cc: linux-arm-kernel@lists.infradead.org > > Cc: linux-kernel@vger.kernel.org > > --- > > drivers/iommu/mtk_iommu.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c > > index 2ab2ecfe01f8..17f6be5a5097 100644 > > --- a/drivers/iommu/mtk_iommu.c > > +++ b/drivers/iommu/mtk_iommu.c > > @@ -454,7 +454,7 @@ static irqreturn_t mtk_iommu_isr(int irq, void > > *dev_id) > > fault_larb = data->plat_data- > > >larbid_remap[fault_larb][sub_comm]; > > } > > > > - if (report_iommu_fault(&dom->domain, bank->parent_dev, > > fault_iova, > > + if (dom && report_iommu_fault(&dom->domain, bank->parent_dev, > > fault_iova, > > > Which SoC does this issue happen? Does this issue is happened in the > upstream kernel or the downstream kernel? I am using chromeos-5.10 and chromeos-5.15 (which are pretty much upstream). I have seen this issue at least with MT8195 and MT8183 > > Normally each port enable the iommu defaultly. Let's print the error > log even though "dom" is null to check which port fail here. then > analyse the port's behavior. > > if (!dom || report_iommu_fault(xx)) > dev_err_ratelimited(xx) sending a v2 with the change. Thanks! > > > write ? IOMMU_FAULT_WRITE : > > IOMMU_FAULT_READ)) { > > dev_err_ratelimited( > > bank->parent_dev, > > > > --- > > base-commit: 4312098baf37ee17a8350725e6e0d0e8590252d4 > > change-id: 20221125-mtk-iommu-13023f971298 > > > > Best regards, -- Ricardo Ribalda
WARNING: multiple messages have this Message-ID (diff)
From: Ricardo Ribalda <ribalda@chromium.org> To: "Yong Wu (吴勇)" <Yong.Wu@mediatek.com> Cc: "robin.murphy@arm.com" <robin.murphy@arm.com>, "joro@8bytes.org" <joro@8bytes.org>, "matthias.bgg@gmail.com" <matthias.bgg@gmail.com>, "will@kernel.org" <will@kernel.org>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "linux-mediatek@lists.infradead.org" <linux-mediatek@lists.infradead.org>, "iommu@lists.linux.dev" <iommu@lists.linux.dev> Subject: Re: [PATCH] iommu/mediatek: Fix crash on isr after kexec() Date: Mon, 28 Nov 2022 23:14:37 +0100 [thread overview] Message-ID: <CANiDSCv_ZBLFTp42AZz9Td_JCR0MKLooW2gtFo3woT-dOQtm8w@mail.gmail.com> (raw) In-Reply-To: <9e81fb3cc4f315f330c610dfb16bad50b7241f4c.camel@mediatek.com> Hi Yong On Mon, 28 Nov 2022 at 07:44, Yong Wu (吴勇) <Yong.Wu@mediatek.com> wrote: > > On Fri, 2022-11-25 at 17:28 +0100, Ricardo Ribalda wrote: > > If the system is rebooted via isr(), the IRQ handler might be > > triggerd > > before the domain is initialized. Resulting on an invalid memory > > access > > error. > > > > Fix: > > [ 0.500930] Unable to handle kernel read from unreadable memory at > > virtual address 0000000000000070 > > [ 0.501166] Call trace: > > [ 0.501174] report_iommu_fault+0x28/0xfc > > [ 0.501180] mtk_iommu_isr+0x10c/0x1c0 > > > > Signed-off-by: Ricardo Ribalda <ribalda@chromium.org> > > --- > > To: Yong Wu <yong.wu@mediatek.com> > > To: Joerg Roedel <joro@8bytes.org> > > To: Will Deacon <will@kernel.org> > > To: Robin Murphy <robin.murphy@arm.com> > > To: Matthias Brugger <matthias.bgg@gmail.com> > > Cc: iommu@lists.linux.dev > > Cc: linux-mediatek@lists.infradead.org > > Cc: linux-arm-kernel@lists.infradead.org > > Cc: linux-kernel@vger.kernel.org > > --- > > drivers/iommu/mtk_iommu.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c > > index 2ab2ecfe01f8..17f6be5a5097 100644 > > --- a/drivers/iommu/mtk_iommu.c > > +++ b/drivers/iommu/mtk_iommu.c > > @@ -454,7 +454,7 @@ static irqreturn_t mtk_iommu_isr(int irq, void > > *dev_id) > > fault_larb = data->plat_data- > > >larbid_remap[fault_larb][sub_comm]; > > } > > > > - if (report_iommu_fault(&dom->domain, bank->parent_dev, > > fault_iova, > > + if (dom && report_iommu_fault(&dom->domain, bank->parent_dev, > > fault_iova, > > > Which SoC does this issue happen? Does this issue is happened in the > upstream kernel or the downstream kernel? I am using chromeos-5.10 and chromeos-5.15 (which are pretty much upstream). I have seen this issue at least with MT8195 and MT8183 > > Normally each port enable the iommu defaultly. Let's print the error > log even though "dom" is null to check which port fail here. then > analyse the port's behavior. > > if (!dom || report_iommu_fault(xx)) > dev_err_ratelimited(xx) sending a v2 with the change. Thanks! > > > write ? IOMMU_FAULT_WRITE : > > IOMMU_FAULT_READ)) { > > dev_err_ratelimited( > > bank->parent_dev, > > > > --- > > base-commit: 4312098baf37ee17a8350725e6e0d0e8590252d4 > > change-id: 20221125-mtk-iommu-13023f971298 > > > > Best regards, -- Ricardo Ribalda _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-11-28 22:14 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-11-25 16:28 [PATCH] iommu/mediatek: Fix crash on isr after kexec() Ricardo Ribalda 2022-11-25 16:28 ` Ricardo Ribalda 2022-11-25 17:02 ` Robin Murphy 2022-11-25 17:02 ` Robin Murphy 2022-11-25 17:15 ` Ricardo Ribalda 2022-11-25 17:15 ` Ricardo Ribalda 2022-11-28 6:44 ` Yong Wu (吴勇) 2022-11-28 6:44 ` Yong Wu (吴勇) 2022-11-28 22:14 ` Ricardo Ribalda [this message] 2022-11-28 22:14 ` Ricardo Ribalda
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