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hv: add default handlers for PIO/MMIO access

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Add the default handlers for PIO and MMIO access which returns all
FFs on read and discards write. These default handlers are registered
when SOS VM or pre-launched VM is created.

v3 -> v4:
- use single layer if in hv_emulate_pio
- change the implementation of pio_default_read

v2 -> v3:
- use runtime vm type instead of CONFIG_PARTITION_MODE
- revise the pio/mmio emulation functions
- revise the pio/mmio default read functions according to MISRA C
- revise the commit message

v1 -> v2:
- add default handlers members in struct acrn_vm and add interfaces
  to register default handlers for PIO and MMIO.

Tracked-On: #2860
Signed-off-by: Jian Jun Chen <jian.jun.chen@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Jian Jun Chen
2019-03-26 11:23:16 +08:00
committed by wenlingz
parent 01b28c8e03
commit cee45a80d9
4 changed files with 137 additions and 50 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
hypervisor/include/arch/x86/guest/io_emul.h
View File

@@ -84,4 +84,17 @@ int32_t register_mmio_emulation_handler(struct acrn_vm *vm,
hv_mem_io_handler_t read_write, uint64_t start,
uint64_t end, void *handler_private_data);
/**
* @brief Register port I/O default handler
*
* @param vm The VM to which the port I/O handlers are registered
*/
void register_pio_default_emulation_handler(struct acrn_vm *vm);
/**
* @brief Register MMIO default handler
*
* @param vm The VM to which the MMIO handler is registered
*/
void register_mmio_default_emulation_handler(struct acrn_vm *vm);
#endif /* IO_EMUL_H */

3
hypervisor/include/arch/x86/guest/vm.h
View File

@@ -112,6 +112,8 @@ struct vm_arch {
struct acrn_vioapic vioapic; /* Virtual IOAPIC base address */
struct acrn_vpic vpic; /* Virtual PIC */
struct vm_io_handler_desc emul_pio[EMUL_PIO_IDX_MAX];
io_read_fn_t default_io_read;
io_write_fn_t default_io_write;
/* reference to virtual platform to come here (as needed) */
} __aligned(PAGE_SIZE);
@@ -132,6 +134,7 @@ struct acrn_vm {
uint16_t emul_mmio_regions; /* Number of emulated mmio regions */
struct mem_io_node emul_mmio[CONFIG_MAX_EMULATED_MMIO_REGIONS];
hv_mem_io_handler_t default_read_write;
uint8_t GUID[16];
struct secure_world_control sworld_control;