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ppc/pnv: generate an OEM SEL event on shutdown 

OpenPOWER systems expect to be notified with such an event before a
shutdown or a reboot. An OEM SEL message is sent with specific
identifiers and a user data containing the request : OFF or REBOOT.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Cédric Le Goater 2017-04-11 17:30:06 +02:00 committed by David Gibson
parent aeaef83dab
commit bce0b69159
3 changed files with 57 additions and 0 deletions
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14
hw/ppc/pnv.c
View File

@ -485,6 +485,15 @@ static void *powernv_create_fdt(MachineState *machine)
return fdt;
}
static void pnv_powerdown_notify(Notifier *n, void *opaque)
{
PnvMachineState *pnv = POWERNV_MACHINE(qdev_get_machine());
if (pnv->bmc) {
pnv_bmc_powerdown(pnv->bmc);
}
}
static void ppc_powernv_reset(void)
{
MachineState *machine = MACHINE(qdev_get_machine());
@ -638,6 +647,11 @@ static void ppc_powernv_init(MachineState *machine)
/* Create an RTC ISA device too */
rtc_init(pnv->isa_bus, 2000, NULL);
/* OpenPOWER systems use a IPMI SEL Event message to notify the
* host to powerdown */
pnv->powerdown_notifier.notify = pnv_powerdown_notify;
qemu_register_powerdown_notifier(&pnv->powerdown_notifier);
}
/*

41
hw/ppc/pnv_bmc.c
View File

@ -32,6 +32,47 @@
/* TODO: include definition in ipmi.h */
#define IPMI_SDR_FULL_TYPE 1
/*
* OEM SEL Event data packet sent by BMC in response of a Read Event
* Message Buffer command
*/
typedef struct OemSel {
/* SEL header */
uint8_t id[2];
uint8_t type;
uint8_t timestamp[4];
uint8_t manuf_id[3];
/* OEM SEL data (6 bytes) follows */
uint8_t netfun;
uint8_t cmd;
uint8_t data[4];
} OemSel;
#define SOFT_OFF 0x00
#define SOFT_REBOOT 0x01
static void pnv_gen_oem_sel(IPMIBmc *bmc, uint8_t reboot)
{
/* IPMI SEL Event are 16 bytes long */
OemSel sel = {
.id = { 0x55 , 0x55 },
.type = 0xC0, /* OEM */
.manuf_id = { 0x0, 0x0, 0x0 },
.timestamp = { 0x0, 0x0, 0x0, 0x0 },
.netfun = 0x3A, /* IBM */
.cmd = 0x04, /* AMI OEM SEL Power Notification */
.data = { reboot, 0xFF, 0xFF, 0xFF },
};
ipmi_bmc_gen_event(bmc, (uint8_t *) &sel, 0 /* do not log the event */);
}
void pnv_bmc_powerdown(IPMIBmc *bmc)
{
pnv_gen_oem_sel(bmc, SOFT_OFF);
}
void pnv_bmc_populate_sensors(IPMIBmc *bmc, void *fdt)
{
int offset;

2
include/hw/ppc/pnv.h
View File

@ -134,6 +134,7 @@ typedef struct PnvMachineState {
uint32_t cpld_irqstate;
IPMIBmc *bmc;
Notifier powerdown_notifier;
} PnvMachineState;
#define PNV_FDT_ADDR 0x01000000
@ -143,6 +144,7 @@ typedef struct PnvMachineState {
* BMC helpers
*/
void pnv_bmc_populate_sensors(IPMIBmc *bmc, void *fdt);
void pnv_bmc_powerdown(IPMIBmc *bmc);
/*
* POWER8 MMIO base addresses