On Thu, Dec 12, 2013 at 09:42:25PM +0530, Anup Patel wrote:
The Power State and Coordination Interface (PSCI) specification defines SYSTEM_OFF and SYSTEM_RESET functions for system poweroff and reboot.
This patchset adds emulation of PSCI SYSTEM_OFF and SYSTEM_RESET functions in KVM ARM/ARM64 by forwarding them to user space (QEMU or KVMTOOL) using KVM_EXIT_SYSTEM_EVENT exit reason.
To try this patch from guest kernel, we will need PSCI-based restart and poweroff support in the guest kenel for both ARM and ARM64.
Rob Herring has already submitted patches for PSCI-based restart and poweroff in ARM kernel but these are not merged yet due unstable device tree bindings of kernel PSCI support. We will be having similar patches for PSCI-based restart and poweroff in ARM64 kernel. (Refer http://www.spinics.net/lists/arm-kernel/msg262217.html) (Refer http://www.spinics.net/lists/devicetree/msg05348.html)
There's something really funky about the threading and reply-to settings of all of these patches, please check your e-mail sending tool config.
Change Log:
V2:
- Replace KVM_EXIT_RESET with KVM_EXIT_SYSTEM_EVENT
- Make kvm_psci_call() return convention to match KVM ARM return convention
V1:
- Initial revised patch after RFC PATCH.
Anup Patel (2): KVM: Add KVM_EXIT_SYSTEM_EVENT to user space API header ARM/ARM64: KVM: Forward PSCI SYSTEM_OFF and SYSTEM_RESET to user space
Documentation/virtual/kvm/api.txt | 15 ++++++++++++ arch/arm/include/asm/kvm_psci.h | 2 +- arch/arm/include/uapi/asm/kvm.h | 2 ++ arch/arm/kvm/handle_exit.c | 13 +++++++--- arch/arm/kvm/psci.c | 48 ++++++++++++++++++++++++++++++------- arch/arm64/include/asm/kvm_psci.h | 2 +- arch/arm64/include/uapi/asm/kvm.h | 2 ++ arch/arm64/kvm/handle_exit.c | 12 +++++++--- include/uapi/linux/kvm.h | 8 +++++++ 9 files changed, 88 insertions(+), 16 deletions(-)
-- 1.7.9.5