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Re: [Qemu-devel] [PATCH] hw/arm/boot: introduce fdt_add_memory_node help
From: |
Igor Mammedov |
Subject: |
Re: [Qemu-devel] [PATCH] hw/arm/boot: introduce fdt_add_memory_node helper |
Date: |
Mon, 22 Oct 2018 14:36:50 +0100 |
On Thu, 18 Oct 2018 16:27:43 +0200
Eric Auger <address@hidden> wrote:
> From: Shameer Kolothum <address@hidden>
>
> We introduce an helper to create a memory node.
maybe add here something about reducing code duplication etc ...
>
> Signed-off-by: Eric Auger <address@hidden>
> Signed-off-by: Shameer Kolothum <address@hidden>
> ---
> hw/arm/boot.c | 54 ++++++++++++++++++++++++++++++++-------------------
> 1 file changed, 34 insertions(+), 20 deletions(-)
>
> diff --git a/hw/arm/boot.c b/hw/arm/boot.c
> index 20c71d7d96..ba2004da5c 100644
> --- a/hw/arm/boot.c
> +++ b/hw/arm/boot.c
> @@ -413,6 +413,36 @@ static void set_kernel_args_old(const struct
> arm_boot_info *info,
> }
> }
>
> +static int fdt_add_memory_node(void *fdt, uint32_t acells, hwaddr mem_base,
> + uint32_t scells, hwaddr mem_len,
> + int numa_node_id)
Maybe following order would be better:
void *fdt, int numa_node_id, uint32_t acells, uint32_t scells, hwaddr mem_base,
hwaddr mem_len
> +{
> + char *nodename = NULL;
> + int ret;
> +
> + nodename = g_strdup_printf("/address@hidden" PRIx64, mem_base);
> + qemu_fdt_add_subnode(fdt, nodename);
> + qemu_fdt_setprop_string(fdt, nodename, "device_type", "memory");
> + ret = qemu_fdt_setprop_sized_cells(fdt, nodename, "reg", acells,
> mem_base,
> + scells, mem_len);
> + if (ret < 0) {
> + fprintf(stderr, "couldn't set %s/reg\n", nodename);
about errors in this function, are they a really reachable?
if not maybe we should use error_abort here.
> + goto out;
> + }
> + if (numa_node_id < 0) {
> + goto out;
> + }
> +
> + ret = qemu_fdt_setprop_cell(fdt, nodename, "numa-node-id", numa_node_id);
I'd leave out this part and keep it where it's now, since it's not common code
and then you won't have to hide it behind magical -1 for non numa case.
> + if (ret < 0) {
> + fprintf(stderr, "couldn't set %s/numa-node-id\n", nodename);
> + }
> +
> +out:
> + g_free(nodename);
> + return ret;
> +}
> +
> static void fdt_add_psci_node(void *fdt)
> {
> uint32_t cpu_suspend_fn;
> @@ -492,7 +522,6 @@ int arm_load_dtb(hwaddr addr, const struct arm_boot_info
> *binfo,
> void *fdt = NULL;
> int size, rc, n = 0;
> uint32_t acells, scells;
> - char *nodename;
> unsigned int i;
> hwaddr mem_base, mem_len;
> char **node_path;
> @@ -566,35 +595,20 @@ int arm_load_dtb(hwaddr addr, const struct
> arm_boot_info *binfo,
> mem_base = binfo->loader_start;
> for (i = 0; i < nb_numa_nodes; i++) {
> mem_len = numa_info[i].node_mem;
> - nodename = g_strdup_printf("/address@hidden" PRIx64, mem_base);
> - qemu_fdt_add_subnode(fdt, nodename);
> - qemu_fdt_setprop_string(fdt, nodename, "device_type", "memory");
> - rc = qemu_fdt_setprop_sized_cells(fdt, nodename, "reg",
> - acells, mem_base,
> - scells, mem_len);
> + rc = fdt_add_memory_node(fdt, acells, mem_base,
> + scells, mem_len, i);
> if (rc < 0) {
> - fprintf(stderr, "couldn't set %s/reg for node %d\n",
> nodename,
> - i);
> goto fail;
> }
>
> - qemu_fdt_setprop_cell(fdt, nodename, "numa-node-id", i);
> mem_base += mem_len;
> - g_free(nodename);
> }
> } else {
> - nodename = g_strdup_printf("/address@hidden" PRIx64,
> binfo->loader_start);
> - qemu_fdt_add_subnode(fdt, nodename);
> - qemu_fdt_setprop_string(fdt, nodename, "device_type", "memory");
> -
> - rc = qemu_fdt_setprop_sized_cells(fdt, nodename, "reg",
> - acells, binfo->loader_start,
> - scells, binfo->ram_size);
> + rc = fdt_add_memory_node(fdt, acells, binfo->loader_start,
> + scells, binfo->ram_size, -1);
> if (rc < 0) {
> - fprintf(stderr, "couldn't set %s reg\n", nodename);
> goto fail;
> }
> - g_free(nodename);
> }
>
> rc = fdt_path_offset(fdt, "/chosen");