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hv: add function to check if using posted interrupt is possible for vm

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Add platform_caps.c to maintain platform related information

Set platform_caps.pi to true if all iommus are posted interrupt capable, false
otherwise

If lapic passthru is not configured and platform_caps.pi is true, the vm
may be able to use posted interrupt for a ptdev, if the ptdev's IRQ is
single-destination

Tracked-On: #4506
Signed-off-by: dongshen <dongsheng.x.zhang@intel.com>
Reviewed-by: Eddie Dong <eddie.dong@Intel.com>
This commit is contained in:
dongshen
2020-03-18 15:41:50 -07:00
committed by wenlingz
parent 47f883db30
commit 6496da7c56
6 changed files with 50 additions and 0 deletions
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hypervisor/Makefile
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@@ -233,6 +233,7 @@ HW_C_SRCS += arch/x86/ioapic.c
HW_C_SRCS += arch/x86/lapic.c
HW_C_SRCS += arch/x86/cpu.c
HW_C_SRCS += arch/x86/cpu_caps.c
HW_C_SRCS += arch/x86/platform_caps.c
HW_C_SRCS += arch/x86/security.c
HW_C_SRCS += arch/x86/mmu.c
HW_C_SRCS += arch/x86/e820.c