A difference between sbsa platform and the virt platform is PSCI is handled by ARM-TF in the sbsa platform. This means that the PSCI code there needs to communicate some of the platform power changes down to the qemu code for things like shutdown/reset control.
Space has been left to extend the EC if we find other use cases in future where ARM-TF and qemu need to communicate. Signed-off-by: Graeme Gregory <[email protected]> --- hw/arm/sbsa-ref.c | 95 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 95 insertions(+) diff --git a/hw/arm/sbsa-ref.c b/hw/arm/sbsa-ref.c index f030a416fd..c8743fc1d0 100644 --- a/hw/arm/sbsa-ref.c +++ b/hw/arm/sbsa-ref.c @@ -41,6 +41,7 @@ #include "hw/usb.h" #include "hw/char/pl011.h" #include "net/net.h" +#include "migration/vmstate.h" #define RAMLIMIT_GB 8192 #define RAMLIMIT_BYTES (RAMLIMIT_GB * GiB) @@ -62,6 +63,7 @@ enum { SBSA_CPUPERIPHS, SBSA_GIC_DIST, SBSA_GIC_REDIST, + SBSA_SECURE_EC, SBSA_SMMU, SBSA_UART, SBSA_RTC, @@ -98,6 +100,14 @@ typedef struct { #define SBSA_MACHINE(obj) \ OBJECT_CHECK(SBSAMachineState, (obj), TYPE_SBSA_MACHINE) +typedef struct { + SysBusDevice parent_obj; + MemoryRegion iomem; +} SECUREECState; + +#define TYPE_SECURE_EC "sbsa-secure-ec" +#define SECURE_EC(obj) OBJECT_CHECK(SECUREECState, (obj), TYPE_SECURE_EC) + static const MemMapEntry sbsa_ref_memmap[] = { /* 512M boot ROM */ [SBSA_FLASH] = { 0, 0x20000000 }, @@ -107,6 +117,7 @@ static const MemMapEntry sbsa_ref_memmap[] = { [SBSA_CPUPERIPHS] = { 0x40000000, 0x00040000 }, [SBSA_GIC_DIST] = { 0x40060000, 0x00010000 }, [SBSA_GIC_REDIST] = { 0x40080000, 0x04000000 }, + [SBSA_SECURE_EC] = { 0x50000000, 0x00001000 }, [SBSA_UART] = { 0x60000000, 0x00001000 }, [SBSA_RTC] = { 0x60010000, 0x00001000 }, [SBSA_GPIO] = { 0x60020000, 0x00001000 }, @@ -585,6 +596,65 @@ static void *sbsa_ref_dtb(const struct arm_boot_info *binfo, int *fdt_size) return board->fdt; } +enum sbsa_secure_ec_powerstates { + SBSA_SECURE_EC_CMD_NULL, + SBSA_SECURE_EC_CMD_POWEROFF, + SBSA_SECURE_EC_CMD_REBOOT, +}; + +static uint64_t secure_ec_read(void *opaque, hwaddr offset, unsigned size) +{ + /* No use for this currently */ + return 0; +} + +static void secure_ec_write(void *opaque, hwaddr offset, + uint64_t value, unsigned size) +{ + if (offset == 0) { /* PSCI machine power command register */ + switch (value) { + case SBSA_SECURE_EC_CMD_NULL: + break; + case SBSA_SECURE_EC_CMD_POWEROFF: + qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); + break; + case SBSA_SECURE_EC_CMD_REBOOT: + qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); + break; + default: + error_report("sbsa-ref: ERROR Unkown power command"); + } + } else { + error_report("sbsa-ref: unknown EC register"); + } +} + +static const MemoryRegionOps secure_ec_ops = { + .read = secure_ec_read, + .write = secure_ec_write, + .endianness = DEVICE_NATIVE_ENDIAN, +}; + +static void secure_ec_init(Object *obj) +{ + SECUREECState *s = SECURE_EC(obj); + SysBusDevice *dev = SYS_BUS_DEVICE(obj); + + memory_region_init_io(&s->iomem, obj, &secure_ec_ops, s, "secure-ec", + 0x1000); + sysbus_init_mmio(dev, &s->iomem); +} + +static void create_secure_ec(MemoryRegion *mem) +{ + hwaddr base = sbsa_ref_memmap[SBSA_SECURE_EC].base; + DeviceState *dev = qdev_create(NULL, TYPE_SECURE_EC); + SysBusDevice *s = SYS_BUS_DEVICE(dev); + + memory_region_add_subregion(mem, base, + sysbus_mmio_get_region(s, 0)); +} + static void sbsa_ref_init(MachineState *machine) { unsigned int smp_cpus = machine->smp.cpus; @@ -708,6 +778,8 @@ static void sbsa_ref_init(MachineState *machine) create_pcie(sms); + create_secure_ec(secure_sysmem); + sms->bootinfo.ram_size = machine->ram_size; sms->bootinfo.nb_cpus = smp_cpus; sms->bootinfo.board_id = -1; @@ -798,8 +870,31 @@ static const TypeInfo sbsa_ref_info = { .instance_size = sizeof(SBSAMachineState), }; +static const VMStateDescription vmstate_secure_ec_info = { + .name = "sbsa-secure-ec", + .version_id = 0, + .minimum_version_id = 0, +}; + +static void secure_ec_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->vmsd = &vmstate_secure_ec_info; + dc->user_creatable = false; +} + +static const TypeInfo secure_ec_info = { + .name = TYPE_SECURE_EC, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(SECUREECState), + .instance_init = secure_ec_init, + .class_init = secure_ec_class_init, +}; + static void sbsa_ref_machine_init(void) { + type_register_static(&secure_ec_info); type_register_static(&sbsa_ref_info); } -- 2.25.1
