When a KVM guest tries to use a feature disabled by HFSCR, it exits to
the host for emulation support, and the code checks for all bits which
are emulated. Avoid checking all the bits by using a switch case.
Signed-off-by: Gautam Menghani <gautam@xxxxxxxxxxxxx>
---
arch/powerpc/kvm/book3s_hv.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 99c7ce825..a72fd2543 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -1922,14 +1922,22 @@ static int kvmppc_handle_exit_hv(struct kvm_vcpu *vcpu,
r = EMULATE_FAIL;
if (cpu_has_feature(CPU_FTR_ARCH_300)) {
- if (cause == FSCR_MSGP_LG)
+ switch (cause) {
+ case FSCR_MSGP_LG:
r = kvmppc_emulate_doorbell_instr(vcpu);
- if (cause == FSCR_PM_LG)
+ break;
+ case FSCR_PM_LG:
r = kvmppc_pmu_unavailable(vcpu);
- if (cause == FSCR_EBB_LG)
+ break;
+ case FSCR_EBB_LG:
r = kvmppc_ebb_unavailable(vcpu);
- if (cause == FSCR_TM_LG)
+ break;
+ case FSCR_TM_LG:
r = kvmppc_tm_unavailable(vcpu);
+ break;
+ default:
+ break;
+ }
}
if (r == EMULATE_FAIL) {
kvmppc_core_queue_program(vcpu, SRR1_PROGILL |
--
2.45.2
