Commit bce0b691 authored by Cédric Le Goater's avatar Cédric Le Goater Committed by David Gibson
Browse files

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: default avatarCédric Le Goater <clg@kaod.org>
Reviewed-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
parent aeaef83d

hw/ppc/pnv.c

+14 −0
Original line number Diff line number Diff line
@@ -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);

}



/*

hw/ppc/pnv_bmc.c

+41 −0
Original line number Diff line number Diff line
@@ -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;

include/hw/ppc/pnv.h

+2 −0
Original line number Diff line number Diff line
@@ -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