diff options
| author | Sean Christopherson <seanjc@google.com> | 2025-06-12 01:45:45 +0300 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2025-06-23 19:50:39 +0300 |
| commit | f965255dc5033387ac7858787c6c792fd789ac34 (patch) | |
| tree | e2005184f5ce1da192f9fa1fe0ad24fc6439836c /include/linux | |
| parent | 0b2b541fa3cd85bb06fdd9353764673aa2bfd54a (diff) | |
| download | linux-f965255dc5033387ac7858787c6c792fd789ac34.tar.xz | |
iommu/amd: KVM: SVM: Set pCPU info in IRTE when setting vCPU affinity
Now that setting vCPU affinity is guarded with ir_list_lock, i.e. now that
avic_physical_id_entry can be safely accessed, set the pCPU info
straight-away when setting vCPU affinity. Putting the IRTE into posted
mode, and then immediately updating the IRTE a second time if the target
vCPU is running is wasteful and confusing.
This also fixes a flaw where a posted IRQ that arrives between putting
the IRTE into guest_mode and setting the correct destination could cause
the IOMMU to ring the doorbell on the wrong pCPU.
Link: https://lore.kernel.org/r/20250611224604.313496-44-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/amd-iommu.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/amd-iommu.h b/include/linux/amd-iommu.h index fe0e16ffe0e5..c9f2df0c4596 100644 --- a/include/linux/amd-iommu.h +++ b/include/linux/amd-iommu.h @@ -32,7 +32,7 @@ extern int amd_iommu_register_ga_log_notifier(int (*notifier)(u32)); extern int amd_iommu_update_ga(int cpu, void *data); -extern int amd_iommu_activate_guest_mode(void *data); +extern int amd_iommu_activate_guest_mode(void *data, int cpu); extern int amd_iommu_deactivate_guest_mode(void *data); #else /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */ @@ -48,7 +48,7 @@ static inline int amd_iommu_update_ga(int cpu, void *data) return 0; } -static inline int amd_iommu_activate_guest_mode(void *data) +static inline int amd_iommu_activate_guest_mode(void *data, int cpu) { return 0; } |