Commit ffeea40f authored by yangxiangkai's avatar yangxiangkai
Browse files

virtcca feature: read or write bar space forwarding to the secure world 

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



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

VirtCCA Coda Feature:
If the bdf number is belong to security device, then read
or write bar space need use tmi interface
transfer to secure world

Signed-off-by: default avatarXiangkai Yang <yangxiangkai@huawei.com>
Signed-off-by: default avatarJunbin Li <lijunbin4@huawei.com>
---
parent 95542c9c

drivers/vfio/pci/vfio_pci_rdwr.c

+92 −0
Original line number Diff line number Diff line
@@ -19,6 +19,13 @@ 


#include "vfio_pci_priv.h"



#ifdef CONFIG_HISI_VIRTCCA_HOST

#ifndef __GENKSYMS__

#include <asm/kvm_tmi.h>

#include <asm/virtcca_cvm_host.h>

#endif

#endif



#ifdef __LITTLE_ENDIAN

#define vfio_ioread64	ioread64

#define vfio_iowrite64	iowrite64
@@ -37,6 +44,64 @@ 
#define vfio_ioread8	ioread8

#define vfio_iowrite8	iowrite8



#ifdef CONFIG_HISI_VIRTCCA_HOST

/* Judge startup virtcca_cvm_host is enable and device is secure or not */

static bool is_virtcca_pci_io_rw(struct vfio_pci_core_device *vdev)

{

	if (!is_virtcca_cvm_enable())

		return false;



	struct pci_dev *pdev = vdev->pdev;

	bool cc_dev = pdev == NULL ? false : is_cc_dev(pci_dev_id(pdev));



	if (cc_dev)

		return true;



	return false;

}



/* Transfer to tmm write io value */

static void virtcca_pci_io_write(struct vfio_pci_core_device *vdev, u64 val,

	u64 size, void __iomem *io)

{

	struct pci_dev *pdev = vdev->pdev;



	WARN_ON(tmi_mmio_write(iova_to_pa(io), val, size, pci_dev_id(pdev)));

}



/* Transfer to tmm read io value */

static u64 virtcca_pci_io_read(struct vfio_pci_core_device *vdev,

	u64 size, void __iomem *io)

{

	struct pci_dev *pdev = vdev->pdev;



	return tmi_mmio_read(iova_to_pa(io), size, pci_dev_id(pdev));

}



#define VFIO_IOWRITE(size) \

static int vfio_pci_iowrite##size(struct vfio_pci_core_device *vdev,	\

			bool test_mem, u##size val, void __iomem *io)	\

{									\

	if (test_mem) {							\

		down_read(&vdev->memory_lock);				\

		if (!__vfio_pci_memory_enabled(vdev)) {			\

			up_read(&vdev->memory_lock);			\

			return -EIO;					\

		}							\

	}								\

									\

	if (is_virtcca_pci_io_rw(vdev)) {				\

		virtcca_pci_io_write(vdev, val, size, io);		\

	} else {							\

		vfio_iowrite##size(val, io);				\

	}								\

									\

	if (test_mem)							\

		up_read(&vdev->memory_lock);				\

									\

	return 0;							\

}

#else

#define VFIO_IOWRITE(size) \

static int vfio_pci_iowrite##size(struct vfio_pci_core_device *vdev,		\

			bool test_mem, u##size val, void __iomem *io)	\
@@ -56,6 +121,7 @@ static int vfio_pci_iowrite##size(struct vfio_pci_core_device *vdev, \ 
									\

	return 0;							\

}

#endif



VFIO_IOWRITE(8)

VFIO_IOWRITE(16)
@@ -64,6 +130,31 @@ VFIO_IOWRITE(32) 
VFIO_IOWRITE(64)

#endif



#ifdef CONFIG_HISI_VIRTCCA_HOST

#define VFIO_IOREAD(size) \

static int vfio_pci_ioread##size(struct vfio_pci_core_device *vdev,	\

			bool test_mem, u##size * val, void __iomem *io)	\

{									\

	if (test_mem) {							\

		down_read(&vdev->memory_lock);				\

		if (!__vfio_pci_memory_enabled(vdev)) {			\

			up_read(&vdev->memory_lock);			\

			return -EIO;					\

		}							\

	}								\

									\

	if (is_virtcca_pci_io_rw(vdev)) {				\

		*val = virtcca_pci_io_read(vdev, size, io);		\

	} else {							\

		*val = vfio_ioread##size(io);				\

	}								\

									\

	if (test_mem)							\

		up_read(&vdev->memory_lock);				\

									\

	return 0;							\

}

#else

#define VFIO_IOREAD(size) \

static int vfio_pci_ioread##size(struct vfio_pci_core_device *vdev,		\

			bool test_mem, u##size *val, void __iomem *io)	\
@@ -83,6 +174,7 @@ static int vfio_pci_ioread##size(struct vfio_pci_core_device *vdev, \ 
									\

	return 0;							\

}

#endif



VFIO_IOREAD(8)

VFIO_IOREAD(16)