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iommu/amd: Fix a stale comment about which legacy mode is user visible

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Update a stale comment about which of the legacy modes is visible to the
user, i.e. can be forced via amd_iommu_intr=legacy.

Fixes: b74aa02d7a ("iommu/amd: Fix legacy interrupt remapping for x2APIC-enabled system")
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Wei Wang <wei.w.wang@hotmail.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Sean Christopherson 2025-03-14 20:21:48 -07:00 committed by Joerg Roedel
parent b30e046cfd
commit 4bf53c2d0c
1 changed files with 6 additions and 5 deletions
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11
drivers/iommu/amd/amd_iommu_types.h
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@ -948,12 +948,13 @@ static inline int get_hpet_devid(int id)
}
enum amd_iommu_intr_mode_type {
AMD_IOMMU_GUEST_IR_LEGACY,
/* This mode is not visible to users. It is used when
* we cannot fully enable vAPIC and fallback to only support
* legacy interrupt remapping via 128-bit IRTE.
/*
* The legacy format mode is not visible to users to prevent the user
* from crashing x2APIC systems, which for all intents and purposes
* require 128-bit IRTEs. The legacy format will be forced as needed
* when hardware doesn't support 128-bit IRTEs.
*/
AMD_IOMMU_GUEST_IR_LEGACY,
AMD_IOMMU_GUEST_IR_LEGACY_GA,
AMD_IOMMU_GUEST_IR_VAPIC,
};