On Sun, Nov 14, 2010 at 05:39:41PM +0200, Gleb Natapov wrote:
>
> Signed-off-by: Gleb Natapov <gleb@xxxxxxxxxx>
> ---
> hw/fw_cfg.c | 14 ++++++++++++++
> hw/fw_cfg.h | 4 +++-
> sysemu.h | 1 +
> vl.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
> 4 files changed, 69 insertions(+), 1 deletions(-)
>
> diff --git a/hw/fw_cfg.c b/hw/fw_cfg.c
> index 7b9434f..f6a67db 100644
> --- a/hw/fw_cfg.c
> +++ b/hw/fw_cfg.c
> @@ -53,6 +53,7 @@ struct FWCfgState {
> FWCfgFiles *files;
> uint16_t cur_entry;
> uint32_t cur_offset;
> + Notifier machine_ready;
> };
>
> static void fw_cfg_write(FWCfgState *s, uint8_t value)
> @@ -315,6 +316,15 @@ int fw_cfg_add_file(FWCfgState *s, const char *filename, uint8_t *data,
> return 1;
> }
>
> +static void fw_cfg_machine_ready(struct Notifier* n)
> +{
> + uint32_t len;
> + char *bootindex = get_boot_devices_list(&len);
> +
> + fw_cfg_add_bytes(container_of(n, FWCfgState, machine_ready),
> + FW_CFG_BOOTINDEX, (uint8_t*)bootindex, len);
> +}
> +
> FWCfgState *fw_cfg_init(uint32_t ctl_port, uint32_t data_port,
> target_phys_addr_t ctl_addr, target_phys_addr_t data_addr)
> {
> @@ -343,6 +353,10 @@ FWCfgState *fw_cfg_init(uint32_t ctl_port, uint32_t data_port,
> fw_cfg_add_i16(s, FW_CFG_MAX_CPUS, (uint16_t)max_cpus);
> fw_cfg_add_i16(s, FW_CFG_BOOT_MENU, (uint16_t)boot_menu);
>
> +
> + s->machine_ready.notify = fw_cfg_machine_ready;
> + qemu_add_machine_init_done_notifier(&s->machine_ready);
> +
> return s;
> }
>
> diff --git a/hw/fw_cfg.h b/hw/fw_cfg.h
> index 856bf91..4d61410 100644
> --- a/hw/fw_cfg.h
> +++ b/hw/fw_cfg.h
> @@ -30,7 +30,9 @@
>
> #define FW_CFG_FILE_FIRST 0x20
> #define FW_CFG_FILE_SLOTS 0x10
> -#define FW_CFG_MAX_ENTRY (FW_CFG_FILE_FIRST+FW_CFG_FILE_SLOTS)
> +#define FW_CFG_FILE_LAST_SLOT (FW_CFG_FILE_FIRST+FW_CFG_FILE_SLOTS)
> +#define FW_CFG_BOOTINDEX (FW_CFG_FILE_LAST_SLOT + 1)
> +#define FW_CFG_MAX_ENTRY FW_CFG_BOOTINDEX
>
> #define FW_CFG_WRITE_CHANNEL 0x4000
> #define FW_CFG_ARCH_LOCAL 0x8000
> diff --git a/sysemu.h b/sysemu.h
> index c42f33a..38a20a3 100644
> --- a/sysemu.h
> +++ b/sysemu.h
> @@ -196,4 +196,5 @@ void register_devices(void);
>
> void add_boot_device_path(int32_t bootindex, DeviceState *dev,
> const char *suffix);
> +char *get_boot_devices_list(uint32_t *size);
> #endif
> diff --git a/vl.c b/vl.c
> index 918d988..cca1e76 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -735,6 +735,57 @@ void add_boot_device_path(int32_t bootindex, DeviceState *dev,
> QTAILQ_INSERT_TAIL(&fw_boot_order, node, link);
> }
>
> +/*
> + * This function returns device list as an array in a below format:
> + * +-----+-----+---------------+-----+---------------+--
> + * | n | l1 | devpath1 | l2 | devpath2 | ...
> + * +-----+-----+---------------+-----+---------------+--
No one will ever want > 256 devices? Let's make it 4 byte or something.
> + * where:
> + * n - a number of devise pathes (one byte)
> + * l - length of following device path string (one byte)
Might not fit: with pci we can have 256 nested buses.
How about simply null-terminating each path?
> + * devpath - non-null terminated string of length l representing
> + * one device path
> + */
Document return value + parameters as well?
> +char *get_boot_devices_list(uint32_t *size)
> +{
> + FWBootEntry *i;
> + uint32_t total = 1, c = 0;
> + char *list = qemu_malloc(1);
> +
> + QTAILQ_FOREACH(i, &fw_boot_order, link) {
> + char *devpath = NULL, *bootpath;
> + int len;
> +
> + if (i->dev) {
> + devpath = qdev_get_fw_dev_path(i->dev);
> + assert(devpath);
> + }
> +
> + if (i->suffix && devpath) {
> + bootpath = qemu_malloc(strlen(devpath) + strlen(i->suffix) + 2);
> + sprintf(bootpath, "%s/%s", devpath, i->suffix);
> + qemu_free(devpath);
devpath is allocated with strdup, not qemu_malloc,
so I guess it should be freed with free?
Alternatively, let's add qemu_strdup
Might be a good idea: fix error handling here and elsewhere.
> + } else if (devpath) {
> + bootpath = devpath;
> + } else {
> + bootpath = strdup(i->suffix);
> + }
assert(bootpath).
> +
> + len = strlen(bootpath);
> + list = qemu_realloc(list, total + len + 1);
> + list[total++] = len;
> + memcpy(&list[total], bootpath, len);
> + total += len;
> + c++;
> + qemu_free(bootpath);
Man, is this tricky.
> + }
> +
> + list[0] = c;
> + *size = total;
> +
> + return list;
> +}
> +
> static void numa_add(const char *optarg)
> {
> char option[128];
> --
> 1.7.1
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