Drivers: hv: vmbus: Support fully enlightened TDX guests

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Add Hyper-V specific code so that a fully enlightened TDX guest (i.e.
without the paravisor) can run on Hyper-V:
  Don't use hv_vp_assist_page. Use GHCI instead.
  Don't try to use the unsupported HV_REGISTER_CRASH_CTL.
  Don't trust (use) Hyper-V's TLB-flushing hypercalls.
  Don't use lazy EOI.
  Share the SynIC Event/Message pages with the hypervisor.
  Don't use the Hyper-V TSC page for now, because non-trivial work is
    required to share the page with the hypervisor.

Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Link: https://lore.kernel.org/r/20230824080712.30327-4-decui@microsoft.com

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Dexuan Cui 2023-08-24 01:07:05 -07:00 • committed by Wei Liu

parent d6e0228d26

commit 68f2f2bc16

4 changed files with 48 additions and 9 deletions

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15

arch/x86/hyperv/hv_apic.c

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19

arch/x86/hyperv/hv_init.c

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14

arch/x86/kernel/cpu/mshyperv.c

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9

drivers/hv/hv.c

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