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[PATCH 1/3] arm: smmu: allow SMMU to have more IRQs than context banks
- To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- Date: Fri, 29 Mar 2024 00:08:57 +0000
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- Cc: Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Julien Grall <julien@xxxxxxx>, Rahul Singh <rahul.singh@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- Delivery-date: Fri, 29 Mar 2024 00:09:30 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Thread-index: AQHagW1LqEDvA9goAU2CqI9xrHsnFw==
- Thread-topic: [PATCH 1/3] arm: smmu: allow SMMU to have more IRQs than context banks
I encountered platform, namely Qualcomm SA8155P where SMMU-compatible
IO-MMU advertises more context IQRs than there are context banks. This
should not be an issue, we need to relax the check in the SMMU driver
to allow such configuration.
Signed-off-by: Volodymyr Babchuk <volodymyr_babchuk@xxxxxxxx>
---
xen/drivers/passthrough/arm/smmu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/xen/drivers/passthrough/arm/smmu.c
b/xen/drivers/passthrough/arm/smmu.c
index 32e2ff279b..2dd3688f3b 100644
--- a/xen/drivers/passthrough/arm/smmu.c
+++ b/xen/drivers/passthrough/arm/smmu.c
@@ -2550,7 +2550,7 @@ static int arm_smmu_device_dt_probe(struct
platform_device *pdev)
parse_driver_options(smmu);
if (smmu->version > ARM_SMMU_V1 &&
- smmu->num_context_banks != smmu->num_context_irqs) {
+ smmu->num_context_banks > smmu->num_context_irqs) {
dev_err(dev,
"found only %d context interrupt(s) but %d required\n",
smmu->num_context_irqs, smmu->num_context_banks);
--
2.43.0
|
