https://bugzilla.kernel.org/show_bug.cgi?id=204209 --- Comment #2 from anthony (antdev66@xxxxxxxxx) --- I tested the patch indicated on https://lkml.org/lkml/2019/7/19/644 with simple row position adjustments for the kernel 5.2.1 and it seems to work. --- a/arch/x86/kvm/x86.c 2019-07-19 20:17:35.358848175 +0200 +++ b/arch/x86/kvm/x86.c 2019-07-19 20:17:17.956692942 +0200 @@ -3264,6 +3264,12 @@ kvm_x86_ops->vcpu_load(vcpu, cpu); + + // fix floating point error kvm guest + if (test_thread_flag(TIF_NEED_FPU_LOAD)) + switch_fpu_return(); + + /* Apply any externally detected TSC adjustments (due to suspend) */ if (unlikely(vcpu->arch.tsc_offset_adjustment)) { adjust_tsc_offset_host(vcpu, vcpu->arch.tsc_offset_adjustment); @@ -7955,9 +7961,11 @@ wait_lapic_expire(vcpu); guest_enter_irqoff(); - fpregs_assert_state_consistent(); - if (test_thread_flag(TIF_NEED_FPU_LOAD)) - switch_fpu_return(); +// fix floating point error kvm guest +// +// fpregs_assert_state_consistent(); +// if (test_thread_flag(TIF_NEED_FPU_LOAD)) +// switch_fpu_return(); if (unlikely(vcpu->arch.switch_db_regs)) { set_debugreg(0, 7); -- You are receiving this mail because: You are watching the assignee of the bug.
