From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Eric Anholt <eric@anholt.net>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Will Deacon <will@kernel.org>, Sasha Levin <sashal@kernel.org>,
linux-arm-kernel@lists.infradead.org,
iommu@lists.linux-foundation.org
Subject: [PATCH AUTOSEL 5.13 061/114] iommu/arm-smmu-qcom: Skip the TTBR1 quirk for db820c.
Date: Fri, 9 Jul 2021 22:16:55 -0400 [thread overview]
Message-ID: <20210710021748.3167666-61-sashal@kernel.org> (raw)
In-Reply-To: <20210710021748.3167666-1-sashal@kernel.org>
From: Eric Anholt <eric@anholt.net>
[ Upstream commit a242f4297cfe3f4589a7620dcd42cc503607fc6b ]
db820c wants to use the qcom smmu path to get HUPCF set (which keeps
the GPU from wedging and then sometimes wedging the kernel after a
page fault), but it doesn't have separate pagetables support yet in
drm/msm so we can't go all the way to the TTBR1 path.
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210326231303.3071950-1-eric@anholt.net
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
index 98b3a1c2a181..44a427833385 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
@@ -130,6 +130,16 @@ static int qcom_adreno_smmu_alloc_context_bank(struct arm_smmu_domain *smmu_doma
return __arm_smmu_alloc_bitmap(smmu->context_map, start, count);
}
+static bool qcom_adreno_can_do_ttbr1(struct arm_smmu_device *smmu)
+{
+ const struct device_node *np = smmu->dev->of_node;
+
+ if (of_device_is_compatible(np, "qcom,msm8996-smmu-v2"))
+ return false;
+
+ return true;
+}
+
static int qcom_adreno_smmu_init_context(struct arm_smmu_domain *smmu_domain,
struct io_pgtable_cfg *pgtbl_cfg, struct device *dev)
{
@@ -144,7 +154,8 @@ static int qcom_adreno_smmu_init_context(struct arm_smmu_domain *smmu_domain,
* be AARCH64 stage 1 but double check because the arm-smmu code assumes
* that is the case when the TTBR1 quirk is enabled
*/
- if ((smmu_domain->stage == ARM_SMMU_DOMAIN_S1) &&
+ if (qcom_adreno_can_do_ttbr1(smmu_domain->smmu) &&
+ (smmu_domain->stage == ARM_SMMU_DOMAIN_S1) &&
(smmu_domain->cfg.fmt == ARM_SMMU_CTX_FMT_AARCH64))
pgtbl_cfg->quirks |= IO_PGTABLE_QUIRK_ARM_TTBR1;
--
2.30.2
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next prev parent reply other threads:[~2021-07-10 2:20 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20210710021748.3167666-1-sashal@kernel.org>
2021-07-10 2:16 ` [PATCH AUTOSEL 5.13 024/114] usb: common: usb-conn-gpio: fix NULL pointer dereference of charger Sasha Levin
2021-07-10 2:16 ` [PATCH AUTOSEL 5.13 051/114] mfd: da9052/stmpe: Add and modify MODULE_DEVICE_TABLE Sasha Levin
2021-07-10 2:16 ` [PATCH AUTOSEL 5.13 056/114] fsi: Add missing MODULE_DEVICE_TABLE Sasha Levin
2021-07-10 2:16 ` Sasha Levin [this message]
2021-07-10 2:16 ` [PATCH AUTOSEL 5.13 065/114] iommu/arm-smmu: Fix arm_smmu_device refcount leak when arm_smmu_rpm_get fails Sasha Levin
2021-07-10 2:17 ` [PATCH AUTOSEL 5.13 066/114] iommu/arm-smmu: Fix arm_smmu_device refcount leak in address translation Sasha Levin
2021-07-10 2:17 ` [PATCH AUTOSEL 5.13 070/114] gpio: zynq: Check return value of pm_runtime_get_sync Sasha Levin
2021-07-10 2:17 ` [PATCH AUTOSEL 5.13 071/114] gpio: zynq: Check return value of irq_get_irq_data Sasha Levin
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