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.
