Commit a8078c65 authored by yangxiangkai's avatar yangxiangkai
Browse files

virtcca feature: bind the kvm handle of cvm with smmu domain 

virtcca inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/IAQON6



--------------------------------

VirtCCA Coda Feature:
Bind the kvm handle of cvm with smmu domain

Signed-off-by: default avatarXiangkai Yang <yangxiangkai@huawei.com>
Signed-off-by: default avatarJunbin Li <lijunbin4@huawei.com>
---
parent 3985ab2b

arch/arm64/kvm/virtcca_cvm.c

+38 −0
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ 
 */

#include <linux/kvm_host.h>

#include <linux/kvm.h>

#include <linux/vfio.h>

#include <asm/kvm_tmi.h>

#include <asm/kvm_pgtable.h>

#include <asm/kvm_emulate.h>
@@ -13,6 +14,8 @@ 
#include <kvm/arm_hypercalls.h>

#include <kvm/arm_psci.h>



#include "../virt/kvm/vfio.h"



/* Protects access to cvm_vmid_bitmap */

static DEFINE_SPINLOCK(cvm_vmid_lock);

static unsigned long *cvm_vmid_bitmap;
@@ -852,3 +855,38 @@ int kvm_init_cvm_vm(struct kvm *kvm) 


	return 0;

}



/*

 * Coda (Confidential device assignment) feature

 * enable devices to pass directly to confidential virtual machines

 */



/**

 * cvm_arm_smmu_domain_set_kvm - Associate SMMU domain with CVM

 * @group: Iommu group

 *

 * Returns:

 * %0 if smmu_domain has been associate cvm or associate cvm successfully

 * %-ENXIO if the iommu group does not have smmu domain

 */

int cvm_arm_smmu_domain_set_kvm(void *group)

{

	struct arm_smmu_domain *arm_smmu_domain = NULL;

	struct iommu_domain *domain;

	struct kvm *kvm;



	domain = virtcca_iommu_group_get_domain((struct iommu_group *)group);

	if (!domain)

		return -ENXIO;



	arm_smmu_domain = to_smmu_domain(domain);

	if (arm_smmu_domain->kvm)

		return 0;



	kvm = virtcca_arm_smmu_get_kvm(arm_smmu_domain);

	if (kvm && kvm_is_virtcca_cvm(kvm))

		arm_smmu_domain->kvm = kvm;



	return 0;

}

drivers/iommu/iommu.c

+10 −0
Original line number Diff line number Diff line
@@ -2498,6 +2498,16 @@ int virtcca_attach_secure_dev(struct iommu_domain *domain, struct iommu_group *g 
	return ret;

}

EXPORT_SYMBOL_GPL(virtcca_attach_secure_dev);



/* Obtain domain information through iommu group */

struct iommu_domain *virtcca_iommu_group_get_domain(struct iommu_group *iommu_group)

{

	if (iommu_group)

		return iommu_group->domain;



	return NULL;

}

EXPORT_SYMBOL_GPL(virtcca_iommu_group_get_domain);

#endif



int iommu_map(struct iommu_domain *domain, unsigned long iova,

drivers/vfio/group.c

+31 −0
Original line number Diff line number Diff line
@@ -957,3 +957,34 @@ void vfio_group_cleanup(void) 
	vfio.class = NULL;

	vfio_container_cleanup();

}



#ifdef CONFIG_HISI_VIRTCCA_HOST

/**

 * virtcca_vfio_file_iommu_group - Return the struct iommu_group for the vfio group file

 * @file: VFIO group file

 *

 * The returned iommu_group is valid as long as a ref is held on the file. This

 * returns a reference on the group. This function is deprecated, only the SPAPR

 * path in kvm should call it.

 */

struct iommu_group *virtcca_vfio_file_iommu_group(struct file *file)

{

	struct vfio_group *group = vfio_group_from_file(file);

	struct iommu_group *iommu_group = NULL;



	if (!IS_ENABLED(CONFIG_HISI_VIRTCCA_HOST))

		return NULL;



	if (!group)

		return NULL;



	mutex_lock(&group->group_lock);

	if (group->iommu_group) {

		iommu_group = group->iommu_group;

		iommu_group_ref_get(iommu_group);

	}

	mutex_unlock(&group->group_lock);

	return iommu_group;

}

EXPORT_SYMBOL_GPL(virtcca_vfio_file_iommu_group);

#endif

include/linux/iommu.h

+1 −0
Original line number Diff line number Diff line
@@ -1766,5 +1766,6 @@ static inline void iopf_group_response(struct iopf_group *group, 
#ifdef CONFIG_HISI_VIRTCCA_HOST

int virtcca_attach_secure_dev(struct iommu_domain *domain, struct iommu_group *group);

int virtcca_smmu_secure_dev_operator(struct iommu_domain *domain, struct device *dev);

struct iommu_domain *virtcca_iommu_group_get_domain(struct iommu_group *iommu_group);

#endif

#endif /* __LINUX_IOMMU_H */

include/linux/vfio.h

+3 −0
Original line number Diff line number Diff line
@@ -290,6 +290,9 @@ void vfio_combine_iova_ranges(struct rb_root_cached *root, u32 cur_nodes, 
 * External user API

 */

struct iommu_group *vfio_file_iommu_group(struct file *file);

#ifdef CONFIG_HISI_VIRTCCA_HOST

struct iommu_group *virtcca_vfio_file_iommu_group(struct file *file);

#endif



#if IS_ENABLED(CONFIG_VFIO_GROUP)

bool vfio_file_is_group(struct file *file);