Re: [Qemu-devel] [PATCH 12/16] ipmi: Add SMBIOS table entry

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

On Fri, 2014-12-12 at 13:15 -0600, minyard@acm.org wrote:
> From: Corey Minyard <cminyard@mvista.com>
> 
> Add an IPMI table entry to the SMBIOS.

Can this be made optional ? I'd like to use the BMC on an OpenPower
model I'm working on but that has no smbios..

Cheers,
Ben.

> Signed-off-by: Corey Minyard <cminyard@mvista.com>
> ---
>  hw/ipmi/isa_ipmi.c | 43 +++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 43 insertions(+)
> 
> diff --git a/hw/ipmi/isa_ipmi.c b/hw/ipmi/isa_ipmi.c
> index e62f744..83ea706 100644
> --- a/hw/ipmi/isa_ipmi.c
> +++ b/hw/ipmi/isa_ipmi.c
> @@ -27,6 +27,7 @@
>  #include "qemu/timer.h"
>  #include "sysemu/char.h"
>  #include "sysemu/sysemu.h"
> +#include "hw/i386/smbios.h"
>  #include "ipmi.h"
>  
>  /* This is the type the user specifies on the -device command line */
> @@ -36,13 +37,50 @@
>  typedef struct ISAIPMIDevice {
>      ISADevice dev;
>      char *interface;
> +    int intftype;
>      uint32_t iobase;
>      int32 isairq;
>      uint8_t slave_addr;
> +    uint8_t version;
>      CharDriverState *chr;
>      IPMIInterface *intf;
>  } ISAIPMIDevice;
>  
> +/* SMBIOS type 38 - IPMI */
> +struct smbios_type_38 {
> +    struct smbios_structure_header header;
> +    uint8_t interface_type;
> +    uint8_t ipmi_spec_revision;
> +    uint8_t i2c_slave_address;
> +    uint8_t nv_storage_device_address;
> +    uint64_t base_address;
> +    uint8_t base_address_modifier;
> +    uint8_t interrupt_number;
> +} QEMU_PACKED;
> +
> +static void ipmi_encode_smbios(void *opaque)
> +{
> +    ISAIPMIDevice *info = opaque;
> +    struct smbios_type_38 smb38;
> +
> +    smb38.header.type = 38;
> +    smb38.header.length = sizeof(smb38);
> +    smb38.header.handle = cpu_to_le16(0x3000);
> +    smb38.interface_type = info->intftype;
> +    smb38.ipmi_spec_revision = info->version;
> +    smb38.i2c_slave_address = info->slave_addr;
> +    smb38.nv_storage_device_address = 0;
> +
> +    /* or 1 to set it to I/O space */
> +    smb38.base_address = cpu_to_le64(info->iobase | 1);
> +
> +     /* 1-byte boundaries, addr bit0=0, level triggered irq */
> +    smb38.base_address_modifier = 1;
> +    smb38.interrupt_number = info->isairq;
> +    smbios_table_entry_add((struct smbios_structure_header *) &smb38,
> +                           sizeof(smb38), true);
> +}
> +
>  static void ipmi_isa_realizefn(DeviceState *dev, Error **errp)
>  {
>      ISADevice *isadev = ISA_DEVICE(dev);
> @@ -50,6 +88,7 @@ static void ipmi_isa_realizefn(DeviceState *dev, Error **errp)
>      char typename[20];
>      Object *intfobj;
>      IPMIInterface *intf;
> +    IPMIInterfaceClass *intfk;
>      Object *bmcobj;
>      IPMIBmc *bmc;
>  
> @@ -68,10 +107,13 @@ static void ipmi_isa_realizefn(DeviceState *dev, Error **errp)
>               TYPE_IPMI_INTERFACE_PREFIX "%s", ipmi->interface);
>      intfobj = object_new(typename);
>      intf = IPMI_INTERFACE(intfobj);
> +    intfk = IPMI_INTERFACE_GET_CLASS(intf);
>      bmc->intf = intf;
>      intf->bmc = bmc;
>      intf->io_base = ipmi->iobase;
>      intf->slave_addr = ipmi->slave_addr;
> +    ipmi->intftype = intfk->smbios_type;
> +    ipmi->version = 0x20; /* Version 2.0 */
>      ipmi_interface_init(intf, errp);
>      if (*errp) {
>          return;
> @@ -103,6 +145,7 @@ static void ipmi_isa_realizefn(DeviceState *dev, Error **errp)
>      qdev_set_legacy_instance_id(dev, intf->io_base, intf->io_length);
>  
>      isa_register_ioport(isadev, &intf->io, intf->io_base);
> +    smbios_register_device_table_handler(ipmi_encode_smbios, ipmi);
>  }
>  
>  static void ipmi_isa_reset(DeviceState *qdev)