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| author | Anup Patel <anup.patel@linaro.org> | 2014-04-29 11:24:18 +0530 |
|---|---|---|
| committer | Christoffer Dall <christoffer.dall@linaro.org> | 2014-04-30 04:18:57 -0700 |
| commit | e8e7fcc5e2710b31ef842ee799db99c07986c364 (patch) | |
| tree | 2f9005ad128030c359da457486de308260ebba89 /arch/arm64/kvm | |
| parent | 50bb0c94759bff8c62f1c7c8f774255e44ec1a41 (diff) | |
| download | linux-e8e7fcc5e2710b31ef842ee799db99c07986c364.tar.gz | |
ARM/ARM64: KVM: Make kvm_psci_call() return convention more flexible
Currently, the kvm_psci_call() returns 'true' or 'false' based on whether the PSCI function call was handled successfully or not. This does not help us emulate system-level PSCI functions where the actual emulation work will be done by user space (QEMU or KVMTOOL). Examples of such system-level PSCI functions are: PSCI v0.2 SYSTEM_OFF and SYSTEM_RESET. This patch updates kvm_psci_call() to return three types of values: 1) > 0 (success) 2) = 0 (success but exit to user space) 3) < 0 (errors) Signed-off-by: Anup Patel <anup.patel@linaro.org> Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'arch/arm64/kvm')
| -rw-r--r-- | arch/arm64/kvm/handle_exit.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/arch/arm64/kvm/handle_exit.c b/arch/arm64/kvm/handle_exit.c index 7bc41eab4c64..182415e1a952 100644 --- a/arch/arm64/kvm/handle_exit.c +++ b/arch/arm64/kvm/handle_exit.c @@ -30,11 +30,15 @@ typedef int (*exit_handle_fn)(struct kvm_vcpu *, struct kvm_run *); static int handle_hvc(struct kvm_vcpu *vcpu, struct kvm_run *run) { - if (kvm_psci_call(vcpu)) + int ret; + + ret = kvm_psci_call(vcpu); + if (ret < 0) { + kvm_inject_undefined(vcpu); return 1; + } - kvm_inject_undefined(vcpu); - return 1; + return ret; } static int handle_smc(struct kvm_vcpu *vcpu, struct kvm_run *run) |