Commit c22607a5 authored by panhengchang's avatar panhengchang Committed by yangxiangkai
Browse files

virtcca feature : force vring alloc use dma api 

virtcca inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/#IB4D2Y



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

VirtCCA Feature:
force vring alloc use dma api

Signed-off-by: default avatarpanhengchang <panhengchang@huawei.com>
---
parent 9612bbba

drivers/virtio/virtio_ring.c

+3 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ 
#include <linux/dma-mapping.h>

#include <linux/kmsan.h>

#include <linux/spinlock.h>

#include <linux/virtcca_cvm_domain.h>

#include <xen/xen.h>



#ifdef DEBUG
@@ -294,6 +295,8 @@ static bool vring_use_dma_api(const struct virtio_device *vdev) 
	if (xen_domain())

		return true;



	if (virtcca_cvm_domain())

		return true;

	return false;

}

include/linux/virtcca_cvm_domain.h

0 → 100644
+29 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0-only */

/*

 * Copyright (C) 2024. Huawei Technologies Co., Ltd. All rights reserved.

 */



#ifndef __VIRTCCA_CVM_DOMAIN_H

#define __VIRTCCA_CVM_DOMAIN_H



#ifdef CONFIG_HISI_VIRTCCA_GUEST



#include <asm/virtcca_cvm_guest.h>

static inline bool virtcca_cvm_domain(void)

{

	return is_virtcca_cvm_world();

}



void enable_swiotlb_for_cvm_dev(struct device *dev, bool enable);



#else

static inline bool virtcca_cvm_domain(void)

{

	return false;

}



void enable_swiotlb_for_cvm_dev(struct device *dev, bool enable) {}



#endif



#endif /* __VIRTCCA_CVM_DOMAIN_H */