On 24/11/2014 16:28, Nadav Amit wrote: > > Since kvm_load_guest_fpu is called before the guest_fpu is ever stored, there are 2 more problems that currently cause #GP: > 1. XCOMP_BV[63] = 0 > 2. XSTATE_BV sets a bit (including bit 63) that is not set in XCOMP_BV (XCOMP_BV is initialised to zero). > > [see SDM 13.11 "OPERATION OF XRSTORS”] > > Once I initialise XCOMP_BV to (1ull << 63) | XSTATE_BV, the guest runs successfully. > I have not checked any other qemu functionality that might be affected by the patch. I posted patches that assume that QEMU calls KVM_SET_XSAVE early enough. If this is not the case, can you cook up and post a patch to kvm_arch_vcpu_init that fixes the remaining problem? Paolo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
