From 2bcf26528787d92333ed0dfd6abc9835b8e97eab Mon Sep 17 00:00:00 2001 From: Mike Travis Date: Tue, 10 Sep 2019 09:58:43 -0500 Subject: [PATCH] x86/platform/uv: Setup UV functions for Hubless UV Systems Add more support for UV systems that do not contain a UV Hub (AKA "hubless"). This update adds support for additional functions required: Use PCH NMI handler instead of a UV Hub NMI handler. Initialize the UV BIOS callback interface used to support specific UV functions. Signed-off-by: Mike Travis Reviewed-by: Steve Wahl Reviewed-by: Dimitri Sivanich Cc: Andrew Morton Cc: Borislav Petkov Cc: Christoph Hellwig Cc: H. Peter Anvin Cc: Hedi Berriche Cc: Justin Ernst Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Russ Anderson Cc: Thomas Gleixner Link: https://lkml.kernel.org/r/20190910145839.975787119@stormcage.eag.rdlabs.hpecorp.net Signed-off-by: Ingo Molnar --- arch/x86/kernel/apic/x2apic_uv_x.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c index 43fad6172873..14554a30ee94 100644 --- a/arch/x86/kernel/apic/x2apic_uv_x.c +++ b/arch/x86/kernel/apic/x2apic_uv_x.c @@ -1457,6 +1457,20 @@ static void __init build_socket_tables(void) } } +/* Initialize UV hubless systems */ +static __init int uv_system_init_hubless(void) +{ + int rc; + + /* Setup PCH NMI handler */ + uv_nmi_setup_hubless(); + + /* Init kernel/BIOS interface */ + rc = uv_bios_init(); + + return rc; +} + static void __init uv_system_init_hub(void) { struct uv_hub_info_s hub_info = {0}; @@ -1596,8 +1610,8 @@ static void __init uv_system_init_hub(void) } /* - * There is a small amount of UV specific code needed to initialize a - * UV system that does not have a "UV HUB" (referred to as "hubless"). + * There is a different code path needed to initialize a UV system that does + * not have a "UV HUB" (referred to as "hubless"). */ void __init uv_system_init(void) { @@ -1607,7 +1621,7 @@ void __init uv_system_init(void) if (is_uv_system()) uv_system_init_hub(); else - uv_nmi_setup_hubless(); + uv_system_init_hubless(); } apic_driver(apic_x2apic_uv_x); -- 2.39.5