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

pci: mcfg: limit device bus numbers which could access by ECAM

Browse Source 
Per PCI Firmware Specification Revision 3.0, 4.1.2. MCFG Table Description:
Memory Mapped Enhanced Configuration Space Base Address Allocation Structure
assign the Start Bus Number and the End Bus Number which could decoded by the
Host Bridge. We should not access the PCI device which bus number outside of
the range of [Start Bus Number, End Bus Number).
For ACRN,  we should:
1. Don't detect PCI device which bus number outside the range of
[Start Bus Number, End Bus Number) of MCFG ACPI Table.
2. Only trap the ECAM MMIO size: [MMCFG_BASE_ADDRESS, MMCFG_BASE_ADDRESS +
(End Bus Number - Start Bus Number + 1) * 0x100000) for SOS.

Tracked-On: #5233

Signed-off-by: Li Fei1 <fei1.li@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Li Fei1
2020-08-31 14:16:17 +08:00
committed by wenlingz
parent 03036062cd
commit a2fd8c5a9d
9 changed files with 67 additions and 29 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
hypervisor/include/hw/pci.h
View File

@@ -208,6 +208,13 @@ enum pci_bar_type {
PCIBAR_MEM64HI,
};
struct pci_mmcfg_region {
uint64_t address; /* Base address, processor-relative */
uint16_t pci_segment; /* PCI segment group number */
uint8_t start_bus; /* Starting PCI Bus number */
uint8_t end_bus; /* Final PCI Bus number */
} __packed;
/* Basic MSIX capability info */
struct pci_msix_cap {
uint32_t capoff;
@@ -324,10 +331,15 @@ static inline bool bdf_is_equal(union pci_bdf a, union pci_bdf b)
return (a.value == b.value);
}
static inline uint64_t get_pci_mmcfg_size(struct pci_mmcfg_region *pci_mmcfg)
{
return 0x100000UL * (pci_mmcfg->end_bus - pci_mmcfg->start_bus + 1U);
}
#ifdef CONFIG_ACPI_PARSE_ENABLED
void set_mmcfg_base(uint64_t mmcfg_base);
void set_mmcfg_region(struct pci_mmcfg_region *region);
#endif
uint64_t get_mmcfg_base(void);
struct pci_mmcfg_region *get_mmcfg_region(void);
struct pci_pdev *init_pdev(uint16_t pbdf, uint32_t drhd_index);
uint32_t pci_pdev_read_cfg(union pci_bdf bdf, uint32_t offset, uint32_t bytes);