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authorAndi Kleen <ak@suse.de>2006-11-14 16:57:46 +0100
committerAndi Kleen <andi@basil.nowhere.org>2006-11-14 16:57:46 +0100
commitfa18f477d0987c011cce047a7c3cd1284f547a14 (patch)
tree4910e79c9cb33fe3982daacf1757c51d6d53e8f7 /arch/x86_64
parent15803a43288da434d34d41c4ed650c3c1728d42c (diff)
[PATCH] x86: Add acpi_user_timer_override option for Asus boards
Timer overrides are normally disabled on Nvidia board because they are commonly wrong, except on new ones with HPET support. Unfortunately there are quite some Asus boards around that don't have HPET, but need a timer override. We don't know yet how to handle this transparently, but at least add a command line option to force the timer override and let them boot. Cc: len.brown@intel.com Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'arch/x86_64')
-rw-r--r--arch/x86_64/kernel/early-quirks.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/early-quirks.c b/arch/x86_64/kernel/early-quirks.c
index 2b1245d8625..68273bff58c 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? */