On 10/16/2013 12:02 PM, Anup Patel wrote: > We have PSCI SYSTEM_OFF and SYSTEM_RESET function call emulation > available when running as Guest using KVM ARM. > > This patch implements system reboot and poweroff using PSCI > SYSTEM_OFF and SYSTEM_RESET. I've done a similar patch [1] which also needs binding documentation to go with it. The last version of which there is no agreement on is here [2]. Rob [1] http://www.spinics.net/lists/arm-kernel/msg262217.html [2] http://www.spinics.net/lists/devicetree/msg05348.html > > > Signed-off-by: Anup Patel <anup.patel@xxxxxxxxxx> > Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@xxxxxxxxxx> > --- > arch/arm/kernel/psci.c | 36 ++++++++++++++++++++++++++++++++++++ > 1 file changed, 36 insertions(+) > > diff --git a/arch/arm/kernel/psci.c b/arch/arm/kernel/psci.c > index 4693188..30d9d65 100644 > --- a/arch/arm/kernel/psci.c > +++ b/arch/arm/kernel/psci.c > @@ -17,11 +17,13 @@ > > #include <linux/init.h> > #include <linux/of.h> > +#include <linux/pm.h> > > #include <asm/compiler.h> > #include <asm/errno.h> > #include <asm/opcodes-sec.h> > #include <asm/opcodes-virt.h> > +#include <asm/system_misc.h> > #include <asm/psci.h> > > struct psci_operations psci_ops; > @@ -33,6 +35,8 @@ enum psci_function { > PSCI_FN_CPU_ON, > PSCI_FN_CPU_OFF, > PSCI_FN_MIGRATE, > + PSCI_FN_SYSTEM_OFF, > + PSCI_FN_SYSTEM_RESET, > PSCI_FN_MAX, > }; > > @@ -153,6 +157,28 @@ static int psci_migrate(unsigned long cpuid) > return psci_to_linux_errno(err); > } > > +static void psci_power_off(void) > +{ > + int err; > + u32 fn; > + > + fn = psci_function_id[PSCI_FN_SYSTEM_OFF]; > + err = invoke_psci_fn(fn, 0, 0, 0); > + if (err) > + pr_warning("%s: failed\n", __func__); > +} > + > +static void psci_restart(enum reboot_mode reboot_mode, const char *cmd) > +{ > + int err; > + u32 fn; > + > + fn = psci_function_id[PSCI_FN_SYSTEM_RESET]; > + err = invoke_psci_fn(fn, 0, 0, 0); > + if (err) > + pr_warning("%s: failed\n", __func__); > +} > + > static const struct of_device_id psci_of_match[] __initconst = { > { .compatible = "arm,psci", }, > {}, > @@ -204,6 +230,16 @@ void __init psci_init(void) > psci_ops.migrate = psci_migrate; > } > > + if (!of_property_read_u32(np, "system_off", &id)) { > + psci_function_id[PSCI_FN_SYSTEM_OFF] = id; > + pm_power_off = psci_power_off; > + } > + > + if (!of_property_read_u32(np, "system_reset", &id)) { > + psci_function_id[PSCI_FN_SYSTEM_RESET] = id; > + arm_pm_restart = psci_restart; > + } > + > out_put_node: > of_node_put(np); > return; > _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/cucslists/listinfo/kvmarm
