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-rw-r--r--Documentation/kernel-parameters.txt4
-rw-r--r--arch/i386/kernel/acpi/boot.c8
-rw-r--r--arch/i386/kernel/acpi/earlyquirk.c8
-rw-r--r--arch/x86_64/kernel/early-quirks.c8
-rw-r--r--include/asm-i386/acpi.h1
-rw-r--r--include/asm-x86_64/acpi.h1
6 files changed, 29 insertions, 1 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index dd00fd556a60..67473849f20e 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -164,6 +164,10 @@ and is between 256 and 4096 characters. It is defined in the file
acpi_skip_timer_override [HW,ACPI]
Recognize and ignore IRQ0/pin2 Interrupt Override.
For broken nForce2 BIOS resulting in XT-PIC timer.
+ acpi_use_timer_override [HW,ACPI}
+ Use timer override. For some broken Nvidia NF5 boards
+ that require a timer override, but don't have
+ HPET
acpi_dbg_layer= [HW,ACPI]
Format: <int>
diff --git a/arch/i386/kernel/acpi/boot.c b/arch/i386/kernel/acpi/boot.c
index 22e4c466e5a3..d12fb97a5337 100644
--- a/arch/i386/kernel/acpi/boot.c
+++ b/arch/i386/kernel/acpi/boot.c
@@ -82,6 +82,7 @@ EXPORT_SYMBOL(acpi_strict);
acpi_interrupt_flags acpi_sci_flags __initdata;
int acpi_sci_override_gsi __initdata;
int acpi_skip_timer_override __initdata;
+int acpi_use_timer_override __initdata;
#ifdef CONFIG_X86_LOCAL_APIC
static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
@@ -1300,6 +1301,13 @@ static int __init parse_acpi_skip_timer_override(char *arg)
return 0;
}
early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
+
+static int __init parse_acpi_use_timer_override(char *arg)
+{
+ acpi_use_timer_override = 1;
+ return 0;
+}
+early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
#endif /* CONFIG_X86_IO_APIC */
static int __init setup_acpi_sci(char *s)
diff --git a/arch/i386/kernel/acpi/earlyquirk.c b/arch/i386/kernel/acpi/earlyquirk.c
index fe799b11ac0a..c9841692bb7c 100644
--- a/arch/i386/kernel/acpi/earlyquirk.c
+++ b/arch/i386/kernel/acpi/earlyquirk.c
@@ -27,11 +27,17 @@ static int __init check_bridge(int vendor, int device)
#ifdef CONFIG_ACPI
/* According to Nvidia all timer overrides are bogus unless HPET
is enabled. */
- if (vendor == PCI_VENDOR_ID_NVIDIA) {
+ if (!acpi_use_timer_override && vendor == PCI_VENDOR_ID_NVIDIA) {
nvidia_hpet_detected = 0;
acpi_table_parse(ACPI_HPET, nvidia_hpet_check);
if (nvidia_hpet_detected == 0) {
acpi_skip_timer_override = 1;
+ printk(KERN_INFO "Nvidia board "
+ "detected. Ignoring ACPI "
+ "timer override.\n");
+ printk(KERN_INFO "If you got timer trouble "
+ "try acpi_use_timer_override\n");
+
}
}
#endif
diff --git a/arch/x86_64/kernel/early-quirks.c b/arch/x86_64/kernel/early-quirks.c
index 2b1245d86258..68273bff58cc 100644
--- a/arch/x86_64/kernel/early-quirks.c
+++ b/arch/x86_64/kernel/early-quirks.c
@@ -45,7 +45,13 @@ static void nvidia_bugs(void)
/*
* All timer overrides on Nvidia are
* wrong unless HPET is enabled.
+ * Unfortunately that's not true on many Asus boards.
+ * We don't know yet how to detect this automatically, but
+ * at least allow a command line override.
*/
+ if (acpi_use_timer_override)
+ return;
+
nvidia_hpet_detected = 0;
acpi_table_parse(ACPI_HPET, nvidia_hpet_check);
if (nvidia_hpet_detected == 0) {
@@ -53,6 +59,8 @@ static void nvidia_bugs(void)
printk(KERN_INFO "Nvidia board "
"detected. Ignoring ACPI "
"timer override.\n");
+ printk(KERN_INFO "If you got timer trouble "
+ "try acpi_use_timer_override\n");
}
#endif
/* RED-PEN skip them on mptables too? */
diff --git a/include/asm-i386/acpi.h b/include/asm-i386/acpi.h
index 6016632d032f..c80b3a94511a 100644
--- a/include/asm-i386/acpi.h
+++ b/include/asm-i386/acpi.h
@@ -132,6 +132,7 @@ extern int acpi_gsi_to_irq(u32 gsi, unsigned int *irq);
#ifdef CONFIG_X86_IO_APIC
extern int acpi_skip_timer_override;
+extern int acpi_use_timer_override;
#endif
static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
diff --git a/include/asm-x86_64/acpi.h b/include/asm-x86_64/acpi.h
index ed59aa4c6ff9..9d1916e59c04 100644
--- a/include/asm-x86_64/acpi.h
+++ b/include/asm-x86_64/acpi.h
@@ -163,6 +163,7 @@ extern u8 x86_acpiid_to_apicid[];
#define ARCH_HAS_POWER_INIT 1
extern int acpi_skip_timer_override;
+extern int acpi_use_timer_override;
#endif /*__KERNEL__*/
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