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remove pci_device_lock in pci.c

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-- remove unnecessary lock in pci_mmcfg_read_cfg and
   pci_mmcfg_write_cfg since the mmio operation is atomic
   if the offest is aligned with 1/2/4 bytes.
-- move pci_is_valid_access to pci.h

Tracked-On: #4958
Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com>
This commit is contained in:
Mingqiang Chi
2020-06-18 13:17:22 +08:00
committed by wenlingz
parent d808031a04
commit 0bd6555cab
3 changed files with 31 additions and 25 deletions
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15
hypervisor/include/hw/pci.h
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@@ -361,6 +361,21 @@ static inline bool is_pci_cfg_multifunction(uint8_t header_type)
return ((header_type & PCIM_MFDEV) == PCIM_MFDEV);
}
static inline bool pci_is_valid_access_offset(uint32_t offset, uint32_t bytes)
{
return ((offset & (bytes - 1U)) == 0U);
}
static inline bool pci_is_valid_access_byte(uint32_t bytes)
{
return ((bytes == 1U) || (bytes == 2U) || (bytes == 4U));
}
static inline bool pci_is_valid_access(uint32_t offset, uint32_t bytes)
{
return (pci_is_valid_access_byte(bytes) && pci_is_valid_access_offset(offset, bytes));
}
bool is_plat_hidden_pdev(union pci_bdf bdf);
bool pdev_need_bar_restore(const struct pci_pdev *pdev);
void pdev_restore_bar(const struct pci_pdev *pdev);