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 <mike.tra...@hpe.com>
Reviewed-by: Steve Wahl <steve.w...@hpe.com>
Reviewed-by: Dimitri Sivanich <dimitri.sivan...@hpe.com>
To: Thomas Gleixner <t...@linutronix.de>
To: Ingo Molnar <mi...@redhat.com>
To: H. Peter Anvin <h...@zytor.com>
To: Andrew Morton <a...@linux-foundation.org>
To: Borislav Petkov <b...@alien8.de>
To: Christoph Hellwig <h...@infradead.org>
To: Sasha Levin <sas...@kernel.org>
Cc: Dimitri Sivanich <dimitri.sivan...@hpe.com>
Cc: Russ Anderson <russ.ander...@hpe.com>
Cc: Hedi Berriche <hedi.berri...@hpe.com>
Cc: Steve Wahl <steve.w...@hpe.com>
Cc: Justin Ernst <justin.er...@hpe.com>
Cc: x...@kernel.org
Cc: linux-kernel@vger.kernel.org
---
arch/x86/kernel/apic/x2apic_uv_x.c | 20 +++++++++++++++++---
1 file changed, 17 insertions(+), 3 deletions(-)
--- linux.orig/arch/x86/kernel/apic/x2apic_uv_x.c
+++ linux/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -1457,6 +1457,20 @@ static void __init build_socket_tables(v
}
}
+/* 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(vo
}
/*
- * 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);
--
