[PATCH v3 4/8] KVM: PPC: Book3S HV: Return error from h_set_mode(SET_DAWR) on POWER9
From: Michael Neuling <hidden>
Date: 2018-03-27 04:37:32
Subsystem:
kernel virtual machine for powerpc (kvm/powerpc), linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
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 <redacted> --- arch/powerpc/kvm/book3s_hv.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 89707354c2..0c17c9f30b 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)
--
2.14.1