The following commit has been merged into the x86/platform branch of tip:
Commit-ID: 2bcf26528787d92333ed0dfd6abc9835b8e97eab
Gitweb:
https://git.kernel.org/tip/2bcf26528787d92333ed0dfd6abc9835b8e97eab
Author: Mike Travis <mike.tra...@hpe.com>
AuthorDate: Tue, 10 Sep 2019 09:58:43 -05:00
Committer: Ingo Molnar <mi...@kernel.org>
CommitterDate: Mon, 07 Oct 2019 13:42:10 +02:00
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 <mike.tra...@hpe.com>
Reviewed-by: Steve Wahl <steve.w...@hpe.com>
Reviewed-by: Dimitri Sivanich <dimitri.sivan...@hpe.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Borislav Petkov <b...@alien8.de>
Cc: Christoph Hellwig <h...@infradead.org>
Cc: H. Peter Anvin <h...@zytor.com>
Cc: Hedi Berriche <hedi.berri...@hpe.com>
Cc: Justin Ernst <justin.er...@hpe.com>
Cc: Linus Torvalds <torva...@linux-foundation.org>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Russ Anderson <russ.ander...@hpe.com>
Cc: Thomas Gleixner <t...@linutronix.de>
Link:
https://lkml.kernel.org/r/20190910145839.975787...@stormcage.eag.rdlabs.hpecorp.net
Signed-off-by: Ingo Molnar <mi...@kernel.org>
---
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 43fad61..14554a3 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);
