On Mon, Apr 11, 2022, Sean Christopherson wrote: > It's obviously not a hard dependency, but using a u64 for the mask here and then > undoing the whole thing is rather silly. Compile tested only at this point, I'll > test on an actual system ASAP and let you know if I did something stupid. > > From: Sean Christopherson <seanjc@xxxxxxxxxx> > Date: Mon, 11 Apr 2022 15:12:16 -0700 > Subject: [PATCH] KVM: x86: Restrict get_mt_mask() to a u8, use > KVM_X86_OP_OPTIONAL_RET0 Verified this works as expected when patching in RET0 on a 32-bit kernel (returning a u64 results in reserved bits in the upper half being set due to EDX not being cleared).
