github/acrn-hypervisor
1
0
Fork 0
mirror of https://github.com/projectacrn/acrn-hypervisor.git synced 2025-09-22 01:07:57 +00:00
Code Issues Projects Releases Wiki Activity

hv: vpci: restore PCI BARs when doing PCIe FLR

Browse Source 
ACRN hypervisor should trap guest doing PCIe FLR. Besides, it should save some status
before doing the FLR and restore them later, only BARs values for now.
This patch will trap guest Device Capabilities Register write operation if the device
supports PCI Express Capability and check whether it wants to do device FLR. If it does,
call pdev_do_flr to do the job.

Tracked-On: #3465
Signed-off-by: Li Fei1 <fei1.li@intel.com>
This commit is contained in:
Li Fei1
2019-12-19 18:51:19 +08:00
committed by wenlingz
parent 3c2f4509af
commit a90e0f6c84
7 changed files with 77 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
hypervisor/include/hw/pci.h
View File

@@ -131,7 +131,15 @@
#define MSIX_CAPLEN 12U
#define MSIX_TABLE_ENTRY_SIZE 16U
/* PCI Express Capability */
#define PCIY_PCIE 0x10U
#define PCIR_PCIE_DEVCAP 0x04U
#define PCIR_PCIE_DEVCTRL 0x08U
#define PCIM_PCIE_FLRCAP (0x1U << 28U)
#define PCIM_PCIE_FLR (0x1U << 15U)
#define HOST_BRIDGE_BDF 0U
#define PCI_STD_NUM_BARS 6U
union pci_bdf {
uint16_t value;
@@ -177,6 +185,10 @@ struct pci_pdev {
uint32_t msi_capoff;
struct pci_msix_cap msix;
/* Function Level Reset Capability */
bool has_flr;
uint32_t pcie_capoff;
};
static inline uint32_t pci_bar_offset(uint32_t idx)
@@ -291,5 +303,6 @@ static inline bool is_pci_cfg_bridge(uint8_t header_type)
return ((header_type & PCIM_HDRTYPE) == PCIM_HDRTYPE_BRIDGE);
}
void pdev_do_flr(union pci_bdf bdf, uint32_t offset, uint32_t bytes, uint32_t val);
#endif /* PCI_H_ */