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HV: Implementing PCI CFG vm-exit handler for partition hypervisor
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>
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/*- | ||
* 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. | ||
* | ||
* $FreeBSD$ | ||
*/ | ||
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/* Virtual PCI device related operations (read/write, etc) */ | ||
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#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" | ||
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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; | ||
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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; | ||
} | ||
} | ||
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return NULL; | ||
} | ||
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/* 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; | ||
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vdev = pci_vdev_find(vpci, vbdf); | ||
if (vdev == NULL) { | ||
return; | ||
} | ||
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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); | ||
} | ||
} | ||
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if (ret) { | ||
pr_dbg("pci_vdev_cfg_handler failed, ret=%d", ret); | ||
} | ||
} | ||
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