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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 | |
parent | 50bb0c94759bff8c62f1c7c8f774255e44ec1a41 (diff) | |
download | op-kernel-dev-e8e7fcc5e2710b31ef842ee799db99c07986c364.zip op-kernel-dev-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')
-rw-r--r-- | arch/arm64/include/asm/kvm_psci.h | 2 | ||||
-rw-r--r-- | arch/arm64/kvm/handle_exit.c | 10 |
2 files changed, 8 insertions, 4 deletions
diff --git a/arch/arm64/include/asm/kvm_psci.h b/arch/arm64/include/asm/kvm_psci.h index e25c658..bc39e55 100644 --- a/arch/arm64/include/asm/kvm_psci.h +++ b/arch/arm64/include/asm/kvm_psci.h @@ -22,6 +22,6 @@ #define KVM_ARM_PSCI_0_2 2 int kvm_psci_version(struct kvm_vcpu *vcpu); -bool kvm_psci_call(struct kvm_vcpu *vcpu); +int kvm_psci_call(struct kvm_vcpu *vcpu); #endif /* __ARM64_KVM_PSCI_H__ */ diff --git a/arch/arm64/kvm/handle_exit.c b/arch/arm64/kvm/handle_exit.c index 7bc41ea..182415e 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) |