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 <mike.tra...@hpe.com>
Reviewed-by: Steve Wahl <steve.w...@hpe.com>
Reviewed-by: Dimitri Sivanich <dimitri.sivan...@hpe.com>
---
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 <linux/efi.h>
+#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);
--
