Indicate to UV user utilities that UV hubless support is available on this system via the existing /proc infterface. The current interface is maintained with the addition of a new /proc leaves ("hubbed" and "hubless") that contain the specific type of UV arch this one is. Signed-off-by: Mike Travis Reviewed-by: Steve Wahl Reviewed-by: Dimitri Sivanich --- arch/x86/include/asm/uv/uv.h | 6 ++ arch/x86/kernel/apic/x2apic_uv_x.c | 93 ++++++++++++++++++++++++++++++++++++- 2 files changed, 98 insertions(+), 1 deletion(-) --- linux.orig/arch/x86/include/asm/uv/uv.h +++ linux/arch/x86/include/asm/uv/uv.h @@ -12,6 +12,8 @@ struct mm_struct; #ifdef CONFIG_X86_UV #include +#define UV_PROC_NODE "sgi_uv" + static inline int uv(int uvtype) { /* uv(0) is "any" */ @@ -25,6 +27,8 @@ static inline bool is_early_uv_system(vo return !((efi.uv_systab == EFI_INVALID_TABLE_ADDR) || !efi.uv_systab); } extern int is_uv_system(void); +extern int _is_uv_hubbed(int uvtype); +#define is_uv_hubbed _is_uv_hubbed extern int _is_uv_hubless(int uvtype); #define is_uv_hubless _is_uv_hubless extern void uv_cpu_init(void); @@ -38,6 +42,8 @@ extern const struct cpumask *uv_flush_tl static inline enum uv_system_type get_uv_system_type(void) { return UV_NONE; } static inline bool is_early_uv_system(void) { return 0; } static inline int is_uv_system(void) { return 0; } +static inline int _is_uv_hubbed(int uv) { return 0; } +#define is_uv_hubbed _is_uv_hubbed static inline int _is_uv_hubless(int uv) { return 0; } #define is_uv_hubless _is_uv_hubless static inline void uv_cpu_init(void) { } --- linux.orig/arch/x86/kernel/apic/x2apic_uv_x.c +++ linux/arch/x86/kernel/apic/x2apic_uv_x.c @@ -46,6 +46,7 @@ DEFINE_PER_CPU(int, x2apic_extra_bits); static enum uv_system_type uv_system_type; +static int uv_hubbed_system; static int uv_hubless_system; static u64 gru_start_paddr, gru_end_paddr; static u64 gru_dist_base, gru_first_node_paddr = -1LL, gru_last_node_paddr; @@ -329,6 +330,24 @@ static int __init uv_acpi_madt_oem_check if (uv_hub_info->hub_revision == 0) goto badbios; + switch (uv_hub_info->hub_revision) { + case UV4_HUB_REVISION_BASE: + uv_hubbed_system = 0x11; + break; + + case UV3_HUB_REVISION_BASE: + uv_hubbed_system = 0x9; + break; + + case UV2_HUB_REVISION_BASE: + uv_hubbed_system = 0x5; + break; + + case UV1_HUB_REVISION_BASE: + uv_hubbed_system = 0x3; + break; + } + pnodeid = early_get_pnodeid(); early_get_apic_socketid_shift(); @@ -379,6 +398,12 @@ int is_uv_system(void) } EXPORT_SYMBOL_GPL(is_uv_system); +int _is_uv_hubbed(int uvtype) +{ + return (uv_hubbed_system & uvtype); +} +EXPORT_SYMBOL_GPL(_is_uv_hubbed); + int _is_uv_hubless(int uvtype) { return (uv_hubless_system & uvtype); @@ -1477,6 +1502,68 @@ static void __init build_socket_tables(v } } +/* Setup user proc fs files */ +static int proc_hubbed_show(struct seq_file *file, void *data) +{ + seq_printf(file, "0x%x\n", uv_hubbed_system); + return 0; +} + +static int proc_hubless_show(struct seq_file *file, void *data) +{ + seq_printf(file, "0x%x\n", uv_hubless_system); + return 0; +} + +static int proc_oemid_show(struct seq_file *file, void *data) +{ + seq_printf(file, "%s/%s\n", oem_id, oem_table_id); + return 0; +} + +static int proc_hubbed_open(struct inode *inode, struct file *file) +{ + return single_open(file, proc_hubbed_show, (void *)NULL); +} + +static int proc_hubless_open(struct inode *inode, struct file *file) +{ + return single_open(file, proc_hubless_show, (void *)NULL); +} + +static int proc_oemid_open(struct inode *inode, struct file *file) +{ + return single_open(file, proc_oemid_show, (void *)NULL); +} + +/* (The open function is set to the hubbed or hubless version) */ +static struct file_operations proc_version_fops = { + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static const struct file_operations proc_oemid_fops = { + .open = proc_oemid_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static __init void uv_setup_proc_files(int hubless) +{ + struct proc_dir_entry *pde; + char *name = hubless ? "hubless" : "hubbed"; + + pde = proc_mkdir(UV_PROC_NODE, NULL); + proc_create(name, 0, pde, &proc_version_fops); + if (hubless) + proc_version_fops.open = proc_hubless_open; + else + proc_version_fops.open = proc_hubbed_open; + proc_create(name, 0, pde, &proc_oemid_fops); +} + /* Initialize UV hubless systems */ static __init int uv_system_init_hubless(void) { @@ -1488,6 +1575,10 @@ static __init int uv_system_init_hubless /* Init kernel/BIOS interface */ rc = uv_bios_init(); + /* Create user access node if UVsystab available */ + if (rc >= 0) + uv_setup_proc_files(1); + return rc; } @@ -1616,7 +1707,7 @@ static void __init uv_system_init_hub(vo uv_nmi_setup(); uv_cpu_init(); uv_scir_register_cpu_notifier(); - proc_mkdir("sgi_uv", NULL); + uv_setup_proc_files(0); /* Register Legacy VGA I/O redirection handler: */ pci_register_set_vga_state(uv_set_vga_state); --