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iommu/vt-d: Downgrade warning for pre-enabled IR
Emitting a warning is overkill in intel_setup_irq_remapping() since the interrupt remapping is pre-enabled. For example, there's no guarantee that kexec will explicitly disable interrupt remapping before booting a new kernel. As a result, users are seeing warning messages like below when they kexec boot a kernel, though there is nothing wrong: DMAR-IR: IRQ remapping was enabled on dmar18 but we are not in kdump mode DMAR-IR: IRQ remapping was enabled on dmar17 but we are not in kdump mode DMAR-IR: IRQ remapping was enabled on dmar16 but we are not in kdump mode ... ... Downgrade the severity of this message to avoid user confusion. CC: Paul Menzel <pmenzel@molgen.mpg.de> Link: https://lore.kernel.org/linux-iommu/5517f76a-94ad-452c-bae6-34ecc0ec4831@molgen.mpg.de/ Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Reviewed-by: Kevin Tian <kevin.tian@intel.com> Link: https://lore.kernel.org/r/20240625043912.258036-1-baolu.lu@linux.intel.com Link: https://lore.kernel.org/r/20240702130839.108139-5-baolu.lu@linux.intel.com Signed-off-by: Will Deacon <will@kernel.org>
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@ -597,8 +597,8 @@ static int intel_setup_irq_remapping(struct intel_iommu *iommu)
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if (ir_pre_enabled(iommu)) {
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if (!is_kdump_kernel()) {
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pr_warn("IRQ remapping was enabled on %s but we are not in kdump mode\n",
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iommu->name);
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pr_info_once("IRQ remapping was enabled on %s but we are not in kdump mode\n",
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iommu->name);
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clear_ir_pre_enabled(iommu);
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iommu_disable_irq_remapping(iommu);
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} else if (iommu_load_old_irte(iommu))
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