From e45f2c07742d447597df001c878bc4a8aafcde37 Mon Sep 17 00:00:00 2001 From: "Denis V. Lunev" Date: Mon, 24 Nov 2008 11:28:36 +0300 Subject: x86: correct link to HPET timer specification Impact: update documentation / help text Original link is dead. Signed-off-by: Denis V. Lunev Signed-off-by: Ingo Molnar --- arch/x86/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/x86') diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index ac22bb7719f7..19f0d97829ee 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -482,7 +482,7 @@ config HPET_TIMER The HPET provides a stable time base on SMP systems, unlike the TSC, but it is more expensive to access, as it is off-chip. You can find the HPET spec at - . + . You can safely choose Y here. However, HPET will only be activated if the platform and the BIOS support this feature. -- cgit v1.2.1 From bacbe9994541c70aa3abd1a013ac738e58d4bfb2 Mon Sep 17 00:00:00 2001 From: Janne Kulmala Date: Tue, 16 Dec 2008 13:39:57 +0200 Subject: x86: enable HPET on Fujitsu u9200 Impact: auto-enable HPET on Fujitsu u9200 HPET timer is listed in the ACPI table, but needs a quirk entry in order to work. Unfortunately, the quirk code runs after first HPET hpet_enable() which has already determined that the timer doesn't work (reads 0xFFFFFFFF). This patch allows hpet_enable() to be called again after running the quirk code. Signed-off-by: Janne Kulmala Signed-off-by: Ingo Molnar --- arch/x86/kernel/hpet.c | 2 +- arch/x86/kernel/quirks.c | 2 ++ 2 files changed, 3 insertions(+), 1 deletion(-) (limited to 'arch/x86') diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c index 067d8de913f6..84089dc8fd1d 100644 --- a/arch/x86/kernel/hpet.c +++ b/arch/x86/kernel/hpet.c @@ -811,7 +811,7 @@ int __init hpet_enable(void) out_nohpet: hpet_clear_mapping(); - boot_hpet_disable = 1; + hpet_address = 0; return 0; } diff --git a/arch/x86/kernel/quirks.c b/arch/x86/kernel/quirks.c index 67465ed89310..309949e9e1c1 100644 --- a/arch/x86/kernel/quirks.c +++ b/arch/x86/kernel/quirks.c @@ -168,6 +168,8 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_31, ich_force_enable_hpet); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_1, ich_force_enable_hpet); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_4, + ich_force_enable_hpet); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_7, ich_force_enable_hpet); -- cgit v1.2.1 From 39c04b55240342d0742ac48538d3d8c71bfc0a94 Mon Sep 17 00:00:00 2001 From: Jeremy Fitzhardinge Date: Tue, 16 Dec 2008 12:32:23 -0800 Subject: x86: make sure we really have an hpet mapping before using it Impact: prepare the hpet code for Xen dom0 booting When booting in Xen dom0, the hpet isn't really accessible, so make sure the mapping is non-NULL before use. Signed-off-by: Jeremy Fitzhardinge Signed-off-by: Ingo Molnar --- arch/x86/kernel/hpet.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'arch/x86') diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c index 84089dc8fd1d..a1f6ed5e1a05 100644 --- a/arch/x86/kernel/hpet.c +++ b/arch/x86/kernel/hpet.c @@ -834,10 +834,11 @@ static __init int hpet_late_init(void) hpet_address = force_hpet_address; hpet_enable(); - if (!hpet_virt_address) - return -ENODEV; } + if (!hpet_virt_address) + return -ENODEV; + hpet_reserve_platform_timers(hpet_readl(HPET_ID)); for_each_online_cpu(cpu) { -- cgit v1.2.1