On 2021-06-14 08:53, John Garry wrote:
On 12/06/2021 03:22, Lu Baolu wrote:
On 2021/6/11 20:20, John Garry wrote:
@@ -453,8 +452,7 @@ static int __init intel_iommu_setup(char *str)
pr_warn("intel_iommu=forcedac deprecated; use
iommu.forcedac instead\n");
iommu_dma_forcedac = true;
} else if (!strncmp(str, "strict", 6)) {
- pr_info("Disable batched IOTLB flush\n");
- intel_iommu_strict = 1;
+ iommu_set_dma_strict(true);
I would like to deprecate this command line and ask users to use
iommu.strict instead.
ok, but then I should probably make the AMD driver also officially
support this.
Oops, I should have documented that "iommu.strict" already applies to
x86 as well. The interaction with the driver-specific parameters is a
bit weird and unintuitive, but it was done knowingly. Let me quickly
spin a kernel-parameters.txt fix for that...
Cheers,
Robin.
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -436,7 +436,7 @@ static int __init intel_iommu_setup(char *str)
pr_warn("intel_iommu=forcedac deprecated; use
iommu.forcedac instead\n");
iommu_dma_forcedac = true;
} else if (!strncmp(str, "strict", 6)) {
- pr_info("Disable batched IOTLB flush\n");
+ pr_warn("intel_iommu=strict deprecated; use
iommu.strict instead\n");
intel_iommu_strict = 1;
Also update Documentation/admin-guide/kernel-parameters.txt accordingly.
Thanks,
John
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