Messages in this thread | | | Date | Wed, 23 Nov 2022 08:04:44 -0800 | Subject | Re: [PATCH 1/6] x86/tdx: Support hypercalls for TDX guests on Hyper-V | From | Dave Hansen <> |
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On 11/22/22 17:56, Dexuan Cui wrote: >> From: Dexuan Cui >> [...] >> The existing asm code for __tdx_hypercall() passes through R10~R15 >> (see TDVMCALL_EXPOSE_REGS_MASK) to the (KVM) hypervisor. >> >> Unluckily, for Hyper-V, we need to pass through RDX, R8, R10 and R11 >> to Hyper-V, so I don't think I can use the existing __tdx_hypercall() ? > I'm checking with the Hyper-V team to see if it's possible for them > to not use RDX and R8, and use R12 and R13 instead. Will keep the > thread updated.
That would be nice. But, to be honest, I don't expect them to change the ABI for one OS. It's not a big deal to just make the function a bit more flexible.
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