Commit e7aa61f4 authored Dec 12, 2018 by Diana Craciun Committed by Michael Ellerman Dec 20, 2018

powerpc/fsl: Flush branch predictor when entering KVM



Switching from the guest to host is another place
where the speculative accesses can be exploited.
Flush the branch predictor when entering KVM.

Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

parent 7fef4362

arch/powerpc/kvm/bookehv_interrupts.S

+4 −0

Original line number	Diff line number	Diff line
		@@ -75,6 +75,10 @@
		PPC_LL r1, VCPU_HOST_STACK(r4)
		PPC_LL r2, HOST_R2(r1)

		START_BTB_FLUSH_SECTION
		BTB_FLUSH(r10)
		END_BTB_FLUSH_SECTION

		mfspr r10, SPRN_PID
		lwz r8, VCPU_HOST_PID(r4)
		PPC_LL r11, VCPU_SHARED(r4)