Return the type of UV hubless system for UV specific code that depends on that. Use a define to indicate the change in arg type for this function in uv.h. Add a function to convert UV system type to bit pattern needed for is_uv_hubless().
Signed-off-by: Mike Travis mike.travis@hpe.com Reviewed-by: Steve Wahl steve.wahl@hpe.com Reviewed-by: Dimitri Sivanich dimitri.sivanich@hpe.com To: Thomas Gleixner tglx@linutronix.de To: Ingo Molnar mingo@redhat.com To: H. Peter Anvin hpa@zytor.com To: Andrew Morton akpm@linux-foundation.org To: Borislav Petkov bp@alien8.de To: Christoph Hellwig hch@infradead.org Cc: Dimitri Sivanich dimitri.sivanich@hpe.com Cc: Russ Anderson russ.anderson@hpe.com Cc: Hedi Berriche hedi.berriche@hpe.com Cc: Steve Wahl steve.wahl@hpe.com Cc: x86@kernel.org Cc: linux-kernel@vger.kernel.org --- v2: remove is_uv_hubless define; remove leading '_' from _is_uv_hubless --- arch/x86/include/asm/uv/uv.h | 12 ++++++++++-- arch/x86/kernel/apic/x2apic_uv_x.c | 27 ++++++++++++++++++--------- 2 files changed, 28 insertions(+), 11 deletions(-)
--- linux.orig/arch/x86/include/asm/uv/uv.h +++ linux/arch/x86/include/asm/uv/uv.h @@ -12,6 +12,14 @@ struct mm_struct; #ifdef CONFIG_X86_UV #include <linux/efi.h>
+static inline int uv(int uvtype) +{ + /* uv(0) is "any" */ + if (uvtype >= 0 && uvtype <= 30) + return 1 << uvtype; + return 1; +} + extern unsigned long uv_systab_phys;
extern enum uv_system_type get_uv_system_type(void); @@ -20,7 +28,7 @@ static inline bool is_early_uv_system(vo return uv_systab_phys && uv_systab_phys != EFI_INVALID_TABLE_ADDR; } extern int is_uv_system(void); -extern int is_uv_hubless(void); +extern int is_uv_hubless(int uvtype); extern void uv_cpu_init(void); extern void uv_nmi_init(void); extern void uv_system_init(void); @@ -32,7 +40,7 @@ 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_hubless(void) { return 0; } +static inline int is_uv_hubless(int uv) { return 0; } static inline void uv_cpu_init(void) { } static inline void uv_system_init(void) { } static inline const struct cpumask * --- linux.orig/arch/x86/kernel/apic/x2apic_uv_x.c +++ linux/arch/x86/kernel/apic/x2apic_uv_x.c @@ -26,7 +26,7 @@ static DEFINE_PER_CPU(int, x2apic_extra_bits);
static enum uv_system_type uv_system_type; -static bool uv_hubless_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; static u64 gru_dist_lmask, gru_dist_umask; @@ -268,11 +268,20 @@ static int __init uv_acpi_madt_oem_check uv_stringify(sizeof(oem_table_id), oem_table_id, _oem_table_id);
if (strncmp(oem_id, "SGI", 3) != 0) { - if (strncmp(oem_id, "NSGI", 4) == 0) { - uv_hubless_system = true; - pr_info("UV: OEM IDs %s/%s, HUBLESS\n", - oem_id, oem_table_id); - } + if (strncmp(oem_id, "NSGI", 4) != 0) + return 0; + + /* UV4 Hubless, CH, (0x11:UV4+Any) */ + if (strncmp(oem_id, "NSGI4", 5) == 0) + uv_hubless_system = 0x11; + + /* UV3 Hubless, UV300/MC990X w/o hub (0x9:UV3+Any) */ + else + uv_hubless_system = 0x9; + + pr_info("UV: OEM IDs %s/%s, HUBLESS(0x%x)\n", + oem_id, oem_table_id, uv_hubless_system); + return 0; }
@@ -350,9 +359,9 @@ int is_uv_system(void) } EXPORT_SYMBOL_GPL(is_uv_system);
-int is_uv_hubless(void) +int is_uv_hubless(int uvtype) { - return uv_hubless_system; + return (uv_hubless_system & uvtype); } EXPORT_SYMBOL_GPL(is_uv_hubless);
@@ -1592,7 +1601,7 @@ static void __init uv_system_init_hub(vo */ void __init uv_system_init(void) { - if (likely(!is_uv_system() && !is_uv_hubless())) + if (likely(!is_uv_system() && !is_uv_hubless(1))) return;
if (is_uv_system())
--