Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 8dbea3fd authored by Suravee Suthikulpanit's avatar Suravee Suthikulpanit Committed by Joerg Roedel
Browse files

iommu/amd: Introduce amd_iommu_update_ga() 



Introduces a new IOMMU API, amd_iommu_update_ga(), which allows
KVM (SVM) to update existing posted interrupt IOMMU IRTE when
load/unload vcpu.

Signed-off-by: default avatarSuravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent bd6fcefc

drivers/iommu/amd_iommu.c

+39 −0
Original line number Diff line number Diff line
@@ -4269,4 +4269,43 @@ int amd_iommu_create_irq_domain(struct amd_iommu *iommu) 


	return 0;

}



int amd_iommu_update_ga(int cpu, bool is_run, void *data)

{

	unsigned long flags;

	struct amd_iommu *iommu;

	struct irq_remap_table *irt;

	struct amd_ir_data *ir_data = (struct amd_ir_data *)data;

	int devid = ir_data->irq_2_irte.devid;

	struct irte_ga *entry = (struct irte_ga *) ir_data->entry;

	struct irte_ga *ref = (struct irte_ga *) ir_data->ref;



	if (!AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir) ||

	    !ref || !entry || !entry->lo.fields_vapic.guest_mode)

		return 0;



	iommu = amd_iommu_rlookup_table[devid];

	if (!iommu)

		return -ENODEV;



	irt = get_irq_table(devid, false);

	if (!irt)

		return -ENODEV;



	spin_lock_irqsave(&irt->lock, flags);



	if (ref->lo.fields_vapic.guest_mode) {

		if (cpu >= 0)

			ref->lo.fields_vapic.destination = cpu;

		ref->lo.fields_vapic.is_run = is_run;

		barrier();

	}



	spin_unlock_irqrestore(&irt->lock, flags);



	iommu_flush_irt(iommu, devid);

	iommu_completion_wait(iommu);

	return 0;

}

EXPORT_SYMBOL(amd_iommu_update_ga);

#endif

drivers/iommu/amd_iommu_types.h

+1 −0
Original line number Diff line number Diff line
@@ -810,6 +810,7 @@ struct amd_ir_data { 
	struct irq_2_irte irq_2_irte;

	struct msi_msg msi_entry;

	void *entry;    /* Pointer to union irte or struct irte_ga */

	void *ref;      /* Pointer to the actual irte */

};



struct amd_irte_ops {

include/linux/amd-iommu.h

+9 −0
Original line number Diff line number Diff line
@@ -179,6 +179,9 @@ static inline int amd_iommu_detect(void) { return -ENODEV; } 
/* IOMMU AVIC Function */

extern int amd_iommu_register_ga_log_notifier(int (*notifier)(u32));



extern int

amd_iommu_update_ga(int cpu, bool is_run, void *data);



#else /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */



static inline int
@@ -187,6 +190,12 @@ amd_iommu_register_ga_log_notifier(int (*notifier)(u32)) 
	return 0;

}



static inline int

amd_iommu_update_ga(int cpu, bool is_run, void *data)

{

	return 0;

}



#endif /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */



#endif /* _ASM_X86_AMD_IOMMU_H */