| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <Pine.SGI.3.96.1080408160826.8706317D-100000@fergus.americas.sgi.com>
Date: Tue, 8 Apr 2008 16:10:02 -0500 (CDT)
From: Alan Mayer <ajm@....com>
To: mingo@...e.hu, torvalds@...ux-foundation.org
Cc: linux-kernel list <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86_64: Change FIRST_SYSTEM_VECTOR to a variable.
Subject: [PATCH] x86_64: Change FIRST_SYSTEM_VECTOR to a variable.
From: Alan Mayer <ajm@....com>
The SGI UV system needs several more system vectors than a vanilla
x86_64 system. Rather than burden the other archs with extra system
vectors that they don't use, change FIRST_SYSTEM_VECTOR to a variable,
so that it can be dynamic.
Signed-off-by: Alan Mayer <ajm@....com>
---
Index: ingo/arch/x86/kernel/i8259_64.c
===================================================================
--- ingo.orig/arch/x86/kernel/i8259_64.c 2008-04-04 14:57:05.000000000 -0500
+++ ingo/arch/x86/kernel/i8259_64.c 2008-04-04 15:57:05.000000000 -0500
@@ -22,6 +22,7 @@
#include <asm/desc.h>
#include <asm/apic.h>
#include <asm/i8259.h>
+#include <asm/genapic.h>
/*
* Common place to define all x86 IRQ vectors
@@ -456,6 +457,22 @@
}
}
+#define SYS_VECTOR_FREE 0
+#define SYS_VECTOR_ALLOCED 1
+
+static char system_vectors[NR_VECTORS] = { [0 ... NR_VECTORS-1] = SYS_VECTOR_FREE};
+
+static int alloc_system_vector(int vector)
+{
+ if (system_vectors[vector] == SYS_VECTOR_FREE) {
+ system_vectors[vector] = SYS_VECTOR_ALLOCED;
+ if (vector < first_system_vector)
+ first_system_vector = vector;
+ return vector;
+ } else
+ BUG();
+}
+
void init_IRQ(void) __attribute__((weak, alias("native_init_IRQ")));
void __init native_init_IRQ(void)
@@ -479,33 +496,37 @@
* The reschedule interrupt is a CPU-to-CPU reschedule-helper
* IPI, driven by wakeup.
*/
- set_intr_gate(RESCHEDULE_VECTOR, reschedule_interrupt);
+ set_intr_gate(alloc_system_vector(RESCHEDULE_VECTOR), reschedule_interrupt);
/* IPIs for invalidation */
- set_intr_gate(INVALIDATE_TLB_VECTOR_START+0, invalidate_interrupt0);
- set_intr_gate(INVALIDATE_TLB_VECTOR_START+1, invalidate_interrupt1);
- set_intr_gate(INVALIDATE_TLB_VECTOR_START+2, invalidate_interrupt2);
- set_intr_gate(INVALIDATE_TLB_VECTOR_START+3, invalidate_interrupt3);
- set_intr_gate(INVALIDATE_TLB_VECTOR_START+4, invalidate_interrupt4);
- set_intr_gate(INVALIDATE_TLB_VECTOR_START+5, invalidate_interrupt5);
- set_intr_gate(INVALIDATE_TLB_VECTOR_START+6, invalidate_interrupt6);
- set_intr_gate(INVALIDATE_TLB_VECTOR_START+7, invalidate_interrupt7);
+ set_intr_gate(alloc_system_vector(INVALIDATE_TLB_VECTOR_START+0), invalidate_interrupt0);
+ set_intr_gate(alloc_system_vector(INVALIDATE_TLB_VECTOR_START+1), invalidate_interrupt1);
+ set_intr_gate(alloc_system_vector(INVALIDATE_TLB_VECTOR_START+2), invalidate_interrupt2);
+ set_intr_gate(alloc_system_vector(INVALIDATE_TLB_VECTOR_START+3), invalidate_interrupt3);
+ set_intr_gate(alloc_system_vector(INVALIDATE_TLB_VECTOR_START+4), invalidate_interrupt4);
+ set_intr_gate(alloc_system_vector(INVALIDATE_TLB_VECTOR_START+5), invalidate_interrupt5);
+ set_intr_gate(alloc_system_vector(INVALIDATE_TLB_VECTOR_START+6), invalidate_interrupt6);
+ set_intr_gate(alloc_system_vector(INVALIDATE_TLB_VECTOR_START+7), invalidate_interrupt7);
/* IPI for generic function call */
- set_intr_gate(CALL_FUNCTION_VECTOR, call_function_interrupt);
+ set_intr_gate(alloc_system_vector(CALL_FUNCTION_VECTOR), call_function_interrupt);
/* Low priority IPI to cleanup after moving an irq */
set_intr_gate(IRQ_MOVE_CLEANUP_VECTOR, irq_move_cleanup_interrupt);
#endif
- set_intr_gate(THERMAL_APIC_VECTOR, thermal_interrupt);
- set_intr_gate(THRESHOLD_APIC_VECTOR, threshold_interrupt);
+ set_intr_gate(alloc_system_vector(THERMAL_APIC_VECTOR), thermal_interrupt);
+ set_intr_gate(alloc_system_vector(THRESHOLD_APIC_VECTOR), threshold_interrupt);
/* self generated IPI for local APIC timer */
- set_intr_gate(LOCAL_TIMER_VECTOR, apic_timer_interrupt);
+ set_intr_gate(alloc_system_vector(LOCAL_TIMER_VECTOR), apic_timer_interrupt);
/* IPI vectors for APIC spurious and error interrupts */
- set_intr_gate(SPURIOUS_APIC_VECTOR, spurious_interrupt);
- set_intr_gate(ERROR_APIC_VECTOR, error_interrupt);
+ set_intr_gate(alloc_system_vector(SPURIOUS_APIC_VECTOR), spurious_interrupt);
+ set_intr_gate(alloc_system_vector(ERROR_APIC_VECTOR), error_interrupt);
+ if (is_uv_system() ) {
+ alloc_system_vector(XPC_ACTIVATE);
+ alloc_system_vector(XPC_NOTIFY);
+ }
if (!acpi_ioapic)
setup_irq(2, &irq2);
Index: ingo/arch/x86/kernel/io_apic_64.c
===================================================================
--- ingo.orig/arch/x86/kernel/io_apic_64.c 2008-04-04 14:57:05.000000000 -0500
+++ ingo/arch/x86/kernel/io_apic_64.c 2008-04-04 15:57:37.000000000 -0500
@@ -82,6 +82,8 @@
static int assign_irq_vector(int irq, cpumask_t mask);
+int first_system_vector = 0xfe;
+
#define __apicdebuginit __init
int sis_apic_bug; /* not actually supported, dummy for compile */
@@ -717,7 +719,7 @@
offset = current_offset;
next:
vector += 8;
- if (vector >= FIRST_SYSTEM_VECTOR) {
+ if (vector >= first_system_vector) {
/* If we run out of vectors on large boxen, must share them. */
offset = (offset + 1) % 8;
vector = FIRST_DEVICE_VECTOR + offset;
Index: ingo/include/asm-x86/hw_irq_64.h
===================================================================
--- ingo.orig/include/asm-x86/hw_irq_64.h 2008-04-04 14:59:42.000000000 -0500
+++ ingo/include/asm-x86/hw_irq_64.h 2008-04-04 15:58:05.000000000 -0500
@@ -85,13 +85,16 @@
*/
#define LOCAL_TIMER_VECTOR 0xef
+#define XPC_ACTIVATE 0xee
+#define XPC_NOTIFY 0xed
+
+
/*
* First APIC vector available to drivers: (vectors 0x30-0xee)
* we start at 0x41 to spread out vectors evenly between priority
* levels. (0x80 is the syscall vector)
*/
#define FIRST_DEVICE_VECTOR (IRQ15_VECTOR + 2)
-#define FIRST_SYSTEM_VECTOR 0xef /* duplicated in irq.h */
#ifndef __ASSEMBLY__
@@ -115,6 +118,8 @@
void threshold_interrupt(void);
void i8254_timer_resume(void);
+extern int first_system_vector;
+
typedef int vector_irq_t[NR_VECTORS];
DECLARE_PER_CPU(vector_irq_t, vector_irq);
extern void __setup_vector_irq(int cpu);
Index: ingo/include/asm-x86/irq_64.h
===================================================================
--- ingo.orig/include/asm-x86/irq_64.h 2008-04-04 14:59:42.000000000 -0500
+++ ingo/include/asm-x86/irq_64.h 2008-04-04 15:58:52.000000000 -0500
@@ -31,7 +31,7 @@
*/
#define NR_VECTORS 256
-#define FIRST_SYSTEM_VECTOR 0xef /* duplicated in hw_irq.h */
+extern int first_system_vector;
#if NR_CPUS < MAX_IO_APICS
#define NR_IRQS (NR_VECTORS + (32 * NR_CPUS))
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists