Commit 9739ff48 authored by Gautam Menghani's avatar Gautam Menghani Committed by Michael Ellerman
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KVM: PPC: Book3S HV: Refactor HFSCR emulation for KVM guests 



Refactor HFSCR emulation for KVM guests when they exit out with
H_FAC_UNAVAIL to use a switch case instead of checking all "cause"
values, since the "cause" values are mutually exclusive; and this is
better expressed with a switch case.

Signed-off-by: default avatarGautam Menghani <gautam@linux.ibm.com>
Reviewed-by: default avatarMadhavan Srinivasan <maddy@linux.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240716115206.70210-1-gautam@linux.ibm.com
parent de9c2c66

arch/powerpc/kvm/book3s_hv.c

+12 −4
Original line number Diff line number Diff line
@@ -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 |