From: Michael Neuling Date: Tue, 27 Mar 2018 04:37:20 +0000 (+1100) Subject: KVM: PPC: Book3S HV: Return error from h_set_mode(SET_DAWR) on POWER9 X-Git-Tag: v5.15~9084^2~72^2~4 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=398e712c007fbd0bf996d25eb6b39d8314c50db4;p=platform%2Fkernel%2Flinux-starfive.git KVM: PPC: Book3S HV: Return error from h_set_mode(SET_DAWR) on POWER9 Return H_P2 on a h_set_mode(SET_DAWR) on POWER9 where the DAWR is disabled. Current Linux guests ignore this error, so they will silently not get the DAWR (sigh). The same error code is being used by POWERVM in this case. Signed-off-by: Michael Neuling Signed-off-by: Michael Ellerman --- diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index a043bde..55c1022 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -741,6 +741,8 @@ static int kvmppc_h_set_mode(struct kvm_vcpu *vcpu, unsigned long mflags, case H_SET_MODE_RESOURCE_SET_DAWR: if (!kvmppc_power8_compatible(vcpu)) return H_P2; + if (!ppc_breakpoint_available()) + return H_P2; if (mflags) return H_UNSUPPORTED_FLAG_START; if (value2 & DABRX_HYP)