[PATCH] x86/platform/uv/BAU: add APIC idt entry

[PATCH] x86/platform/uv/BAU: add APIC idt entry

[Andrew Banman]

BAU uses the old alloc_initr_gate method to setup its interrupt. This
fails silently as the BAU vector is in the range of APIC vectors that
are registerted to the spurious interrupt handler. Then BAU broadcasts
are not handled, and the broadcast source CPU hangs.

Fixed by updating BAU to use new idt structure.

Signed-off-by: Andrew Banman <abanman@hpe.com>
Acked-by: Mike Travis <mike.travis@hpe.com>
---
 arch/x86/include/asm/hw_irq.h | 1 +
 arch/x86/kernel/idt.c         | 3 +++
 arch/x86/platform/uv/tlb_uv.c | 2 --
 3 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index 6dfe366..a56cd0b 100644
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -33,6 +33,7 @@
 extern asmlinkage void kvm_posted_intr_nested_ipi(void);
 extern asmlinkage void error_interrupt(void);
 extern asmlinkage void irq_work_interrupt(void);
+extern asmlinkage void uv_bau_message_intr1(void);
 
 extern asmlinkage void spurious_interrupt(void);
 extern asmlinkage void thermal_interrupt(void);
diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c
index 99f93a6..c5da34e 100644
--- a/arch/x86/kernel/idt.c
+++ b/arch/x86/kernel/idt.c
@@ -138,6 +138,9 @@ struct idt_data {
 # ifdef CONFIG_IRQ_WORK
 	INTG(IRQ_WORK_VECTOR,		irq_work_interrupt),
 # endif
+#ifdef CONFIG_X86_UV
+	INTG(UV_BAU_MESSAGE,		uv_bau_message_intr1),
+#endif
 	INTG(SPURIOUS_APIC_VECTOR,	spurious_interrupt),
 	INTG(ERROR_APIC_VECTOR,		error_interrupt),
 #endif
diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c
index f44c0bc..5e22845 100644
--- a/arch/x86/platform/uv/tlb_uv.c
+++ b/arch/x86/platform/uv/tlb_uv.c
@@ -2254,8 +2254,6 @@ static int __init uv_bau_init(void)
 			init_uvhub(uvhub, vector, uv_base_pnode);
 	}
 
-	alloc_intr_gate(vector, uv_bau_message_intr1);
-
 	for_each_possible_blade(uvhub) {
 		if (uv_blade_nr_possible_cpus(uvhub)) {
 			unsigned long val;
-- 
1.8.2.1

[tip:x86/urgent] x86/platform/uv/BAU: Add APIC idt entry

[tip-bot for Andrew Banman]

Commit-ID:  151ad17fbe5e56afa59709f41980508672c777ce
Gitweb:     https://git.kernel.org/tip/151ad17fbe5e56afa59709f41980508672c777ce
Author:     Andrew Banman <abanman@hpe.com>
AuthorDate: Tue, 27 Mar 2018 17:09:06 -0500
Committer:  Thomas Gleixner <tglx@linutronix.de>
CommitDate: Wed, 28 Mar 2018 10:40:55 +0200

x86/platform/uv/BAU: Add APIC idt entry

BAU uses the old alloc_initr_gate90 method to setup its interrupt. This
fails silently as the BAU vector is in the range of APIC vectors that are
registered to the spurious interrupt handler. As a consequence BAU
broadcasts are not handled, and the broadcast source CPU hangs.

Update BAU to use new idt structure.

Fixes: dc20b2d52653 ("x86/idt: Move interrupt gate initialization to IDT code")
Signed-off-by: Andrew Banman <abanman@hpe.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Mike Travis <mike.travis@hpe.com>
Cc: Dimitri Sivanich <sivanich@hpe.com>
Cc: Russ Anderson <rja@hpe.com>
Cc: stable@vger.kernel.org
Cc: "H. Peter Anvin" <hpa@zytor.com>
Link: https://lkml.kernel.org/r/1522188546-196177-1-git-send-email-abanman@hpe.com

---
 arch/x86/include/asm/hw_irq.h | 1 +
 arch/x86/kernel/idt.c         | 3 +++
 arch/x86/platform/uv/tlb_uv.c | 2 --
 3 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index 2851077b6051..32e666e1231e 100644
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -36,6 +36,7 @@ extern asmlinkage void kvm_posted_intr_wakeup_ipi(void);
 extern asmlinkage void kvm_posted_intr_nested_ipi(void);
 extern asmlinkage void error_interrupt(void);
 extern asmlinkage void irq_work_interrupt(void);
+extern asmlinkage void uv_bau_message_intr1(void);
 
 extern asmlinkage void spurious_interrupt(void);
 extern asmlinkage void thermal_interrupt(void);
diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c
index 56d99be3706a..5d039c848bd9 100644
--- a/arch/x86/kernel/idt.c
+++ b/arch/x86/kernel/idt.c
@@ -140,6 +140,9 @@ static const __initconst struct idt_data apic_idts[] = {
 # ifdef CONFIG_IRQ_WORK
 	INTG(IRQ_WORK_VECTOR,		irq_work_interrupt),
 # endif
+#ifdef CONFIG_X86_UV
+	INTG(UV_BAU_MESSAGE,		uv_bau_message_intr1),
+#endif
 	INTG(SPURIOUS_APIC_VECTOR,	spurious_interrupt),
 	INTG(ERROR_APIC_VECTOR,		error_interrupt),
 #endif
diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c
index db77e087adaf..b36caae0fb2f 100644
--- a/arch/x86/platform/uv/tlb_uv.c
+++ b/arch/x86/platform/uv/tlb_uv.c
@@ -2255,8 +2255,6 @@ static int __init uv_bau_init(void)
 			init_uvhub(uvhub, vector, uv_base_pnode);
 	}
 
-	alloc_intr_gate(vector, uv_bau_message_intr1);
-
 	for_each_possible_blade(uvhub) {
 		if (uv_blade_nr_possible_cpus(uvhub)) {
 			unsigned long val;