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HV: deny HV owned PCI bar access from SOS

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This patch denies Service VM the access permission to device resources
owned by hypervisor.
HV may own these devices: (1) debug uart pci device for debug version
(2) type 1 pci device if have pre-launched VMs.
Current implementation exposes the mmio/pio resource of HV owned devices
to SOS, should remove them from SOS.

Tracked-On: #5615
Signed-off-by: Tao Yuhong <yuhong.tao@intel.com>
This commit is contained in:
Tao Yuhong
2021-01-29 17:16:10 -05:00
committed by wenlingz
parent 6e7ce4a73f
commit 50d8525618
6 changed files with 73 additions and 36 deletions
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5
hypervisor/include/hw/pci.h
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@@ -338,11 +338,14 @@ void set_mmcfg_region(struct pci_mmcfg_region *region);
#endif
struct pci_mmcfg_region *get_mmcfg_region(void);
struct pci_pdev *init_pdev(uint16_t pbdf, uint32_t drhd_index);
struct pci_pdev *pci_init_pdev(union pci_bdf pbdf, uint32_t drhd_index);
uint32_t pci_pdev_read_cfg(union pci_bdf bdf, uint32_t offset, uint32_t bytes);
void pci_pdev_write_cfg(union pci_bdf bdf, uint32_t offset, uint32_t bytes, uint32_t val);
void enable_disable_pci_intx(union pci_bdf bdf, bool enable);
bool is_hv_owned_pdev(union pci_bdf pbdf);
uint32_t get_hv_owned_pdev_num(void);
const struct pci_pdev **get_hv_owned_pdevs(void);
/*
* @brief Walks the PCI heirarchy and initializes array of pci_pdev structs
* Uses DRHD info from ACPI DMAR tables to cover the endpoints and