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iommu/amd: KVM: SVM: Delete now-unused cached/previous GA tag fields

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Delete the amd_ir_data.prev_ga_tag field now that all usage is
superfluous.

Reviewed-by: Vasant Hegde <vasant.hegde@amd.com>
Tested-by: Sairaj Kodilkar <sarunkod@amd.com>
Link: https://lore.kernel.org/r/20250611224604.313496-8-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2025-06-11 15:45:09 -07:00
parent 0a917e9d4b
commit 1da19c5ce0
4 changed files with 1 additions and 14 deletions
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2
arch/x86/kvm/svm/avic.c
View File

@ -939,9 +939,7 @@ int avic_pi_update_irte(struct kvm_kernel_irqfd *irqfd, struct kvm *kvm,
/**
* Here, pi is used to:
* - Tell IOMMU to use legacy mode for this interrupt.
* - Retrieve ga_tag of prior interrupt remapping data.
*/
pi.prev_ga_tag = 0;
pi.is_guest_mode = false;
ret = irq_set_vcpu_affinity(host_irq, &pi);
}

1
drivers/iommu/amd/amd_iommu_types.h
View File

@ -1054,7 +1054,6 @@ struct irq_2_irte {
};
struct amd_ir_data {
u32 cached_ga_tag;
struct amd_iommu *iommu;
struct irq_2_irte irq_2_irte;
struct msi_msg msi_entry;

10
drivers/iommu/amd/iommu.c
View File

@ -3887,23 +3887,13 @@ static int amd_ir_set_vcpu_affinity(struct irq_data *data, void *vcpu_info)
ir_data->cfg = irqd_cfg(data);
pi_data->ir_data = ir_data;
pi_data->prev_ga_tag = ir_data->cached_ga_tag;
if (pi_data->is_guest_mode) {
ir_data->ga_root_ptr = (pi_data->base >> 12);
ir_data->ga_vector = vcpu_pi_info->vector;
ir_data->ga_tag = pi_data->ga_tag;
ret = amd_iommu_activate_guest_mode(ir_data);
if (!ret)
ir_data->cached_ga_tag = pi_data->ga_tag;
} else {
ret = amd_iommu_deactivate_guest_mode(ir_data);
/*
* This communicates the ga_tag back to the caller
* so that it can do all the necessary clean up.
*/
if (!ret)
ir_data->cached_ga_tag = 0;
}
return ret;

2
include/linux/amd-iommu.h
View File

@ -19,8 +19,8 @@ struct amd_iommu;
*/
struct amd_iommu_pi_data {
u32 ga_tag;
u32 prev_ga_tag;
u64 base;
bool is_guest_mode;
struct vcpu_data *vcpu_data;
void *ir_data;