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The the bdf(bus/dev/func) is used to determine which pass-through device should be assigned/released. Now the hypervisor parses the corresponding bdf from the guest physical address when hcall_assign_ptdev/hcall_deassign_ptdev is called. As it is only uint16_t, it is unnecessary to use the GPA to pass the bdf parameter. Instead the parameter can be used as the bdf directly. In order to keep the compatibility, it still can get the bdf by using copy_from_gpa when SOS passes the parameter based on the buffer. But this will be depreciated. This is based on the assumption that the GPA in SOS is greater than 0x10000 when one buffer is allocated to pass the corresponding hypercall parameter. After the SOS uses the bdf to pass the hypercall paremeter, we can remove the code that gets the bdf by using copy_from_gpa. V1->V2: Add some comments for hcall_assign_ptdev/hcall_deassign_ptdev. Tracked-on: #1751 Signed-off-by: Zhao Yakui <yakui.zhao@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com> |
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| arch/x86 | ||
| common | ||
| debug | ||
| dm | ||
| lib | ||
| public | ||
| hv_debug.h | ||
| hypervisor.h | ||