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HV: Implementing PCI CFG vm-exit handler for partition hypervisor

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V4:
 - If pci device is not found in the PCI mapping table, just return without
   throwing any error message
 - Added NULL pointer checking when calling cfgread/cfgwrite ops
 - Moved error checking code to cfgread/cfgwrite ops

V3:
 - Do not use ASSERT
 - Call the cfg read/write ops defined in the vm description

V2:
 - Fixed MISRA violations

Reviewed-by: Anthony Xu <anthony.xu@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
Signed-off-by: dongshen <dongsheng.x.zhang@intel.com>
This commit is contained in:
dongshen 2018-08-07 18:36:43 -07:00 committed by lijinxia
parent 86180bd4ce
commit 5f3ea06feb
2 changed files with 85 additions and 6 deletions
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85
hypervisor/dm/vpci/pci_vdev.c Normal file
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@ -0,0 +1,85 @@
/*-
* Copyright (c) 2011 NetApp, Inc.
* Copyright (c) 2018 Intel Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
/* Virtual PCI device related operations (read/write, etc) */
#include <hypervisor.h>
#include <hv_lib.h>
#include <acrn_common.h>
#include <hv_arch.h>
#include <hv_debug.h>
#include <acrn_hv_defs.h>
#include "pci_priv.h"
static struct pci_vdev *pci_vdev_find(struct vpci *vpci, uint16_t vbdf)
{
struct vpci_vdev_array *vdev_array;
struct pci_vdev *vdev;
int i;
vdev_array = vpci->vm->vm_desc->vpci_vdev_array;
for (i = 0; i < vdev_array->num_pci_vdev; i++) {
vdev = &vdev_array->vpci_vdev_list[i];
if (vdev->vbdf == vbdf) {
return vdev;
}
}
return NULL;
}
/* PCI cfg vm-exit handler */
void pci_vdev_cfg_handler(struct vpci *vpci, uint32_t in, uint16_t vbdf,
uint32_t offset, uint32_t bytes, uint32_t *val)
{
struct pci_vdev *vdev;
int ret;
vdev = pci_vdev_find(vpci, vbdf);
if (vdev == NULL) {
return;
}
ret = -EINVAL;
if (in) {
if ((vdev->ops != NULL) && (vdev->ops->cfgread != NULL)) {
ret = vdev->ops->cfgread(vdev, offset, bytes, val);
}
} else {
if ((vdev->ops != NULL) && (vdev->ops->cfgwrite != NULL)) {
ret = vdev->ops->cfgwrite(vdev, offset, bytes, *val);
}
}
if (ret) {
pr_dbg("pci_vdev_cfg_handler failed, ret=%d", ret);
}
}

6
hypervisor/dm/vpci/vpci.c
View File

@ -167,9 +167,3 @@ void vpci_cleanup(struct vm *vm)
}
}
}
void pci_vdev_cfg_handler(struct vpci *vpci, uint32_t in, uint16_t vbdf,
uint32_t offset, uint32_t bytes, uint32_t *val)
{
/* vm-exit handler */
}