similar to: [PATCH] Disable HPET broadcast mode on kexec

... by the call to hpet_disable() added in the immediately preceding patch. In order to retain the behavior intended by c/s 23776:0ddb4481f883, implement one of the alternative options pointed out there: remove CPUs from the online map in __stop_this_cpu() (and hence doing so in stop_this_cpu() is no longer needed). Signed-off-by: Jan Beulich <jbeulich@suse.com> --- a/xen/arch/x86/crash.c

Linux up to now is not smart enough to properly clear the HPET when it boots, which is particularly a problem when a kdump attempt from running under Xen is being made. Linux itself added code to work around this to its shutdown paths quite some time ago, so let''s do something similar in Xen: Save the configuration register settings during boot, and restore them during shutdown. This

... to be more precise in naming, and also to match Linux. Signed-off-by: Jan Beulich <jbeulich@novell.com> --- 2009-07-10.orig/xen/arch/ia64/linux-xen/perfmon.c 2009-05-27 13:54:05.000000000 +0200 +++ 2009-07-10/xen/arch/ia64/linux-xen/perfmon.c 2009-07-15 10:02:08.000000000 +0200 @@ -7313,7 +7313,7 @@ xenpfm_context_create(XEN_GUEST_HANDLE(p goto out; /* XXX fmt */ -

Attached and below are a patch that unifies the shutdown code paths in Xen, including those from EARLY_FAIL. This will facilitate the use of Intel(R) TXT for measured launch by ensuring that all shutdowns will call the necessary hook to tear down the measured environment. It also centralizes any future shutdown-related changes. The patch also postpones clearing the online status APs in

Add check on hpet existence which is removed accidentally in previous changeset (18790). Or else BAD PERIOD error can be seen. Signed-off-by Kevin Tian <kevin.tian@intel.com> diff -r ab0c1bdede53 xen/arch/x86/hpet.c --- a/xen/arch/x86/hpet.c Wed Nov 26 11:14:26 2008 +0000 +++ b/xen/arch/x86/hpet.c Wed Nov 26 19:22:03 2008 -0500 @@ -273,6 +273,8 @@ return hpet_rate;

The attached patch adds the HPET description table to ACPI. -- Dexuan Signed-off-by: Dexuan Cui <dexuan.cui@intel.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

I have an old Dell 1950 that I've rescued from Linux and tossed a copy of -STABLE on it, but am seeing a constant 0.5 load average. With the system completely idle, and kern.eventtimer.timer=LACPI, the load drops to the expected value of zero. This feels like it should be an FAQ, but short of noting that the load is non-zero, is there a programatic way to determine if the event timer is

HPET intr-near-missing means if the current counter value is too close to the comparator value to be reprogrammed the expected HPET intr may be missing. Linux kernel uses a mininal 48-hpet-ticks(~3.5us) distance to workaround this, but personal observation showed there is still failure case while delta=0xba (~13.5us). So choosing 20us as the MIN_DELTA_NS should be helpful to prevent near-missing

I have an error in my dmesg system log about hpet not correctly enabling: hpet_acpi_add: no address or irqs in _CRS The same kernel without Xen enables it fine: hpet0: at MMIO 0xfed00000 (virtual 0xffffffffff5fe000), IRQs 2, 8, 31 hpet0: 3 32-bit timers, 25000000 Hz hpet_resources: 0xfed00000 is busy Do I have to pass an additional boot option? (ACPI is already enabled) or is there

Due to recent changes in timer handling (specifically building hpet emulation on top of Xen system time and ensuring it is monotonic), I wonder if it now makes sense to: 1) change hvm default for hpet to 1 (was 0) 2) change hvm timer_mode default from 0 to 2 I encouraged adding the hvm hpet parameter and defaulting it to 0 because the virtual hpet was not reliable and many guests/versions

This follows Linux commit 39fe05e58c5e448601ce46e6b03900d5bf31c4b0, noticing that all this setup is pointless when ARAT support is there, and knowing that on SLED11''s native kernel it has actually caused S3 resume issues. A question would be whether HPET legacy interrupts should be forced off in this case (rather than leaving whatever came from firmware). Signed-off-by: Jan Beulich

On Thu, 30 Sep 2010 14:02:34 +0800, gang.wei@intel.com wrote: > I am the original developer of HPET broadcast code. > > First of all, to disable HPET broadcast, no additional patch is required. > Please simply add option "cpuidle=off" or "max_cstate=1" at xen cmdline in > /boot/grub/grub.conf. > > Second, I noticed that the issue just occur on

From: Julien Grall <julien.grall@citrix.com> Move smp_call_function and on_selected_cpus to common code. Signed-off-by: Julien Grall <julien.grall@citrix.com> Acked-by: Ian Campbell <ian.campbell@citrix.com> Acked-by: Keir Fraser <keir@xen.org> --- Changes in V2: - Add copyright header in xen/common/smp.c xen/arch/arm/gic.c | 3 ++ xen/arch/arm/smp.c

Windows SVVP tests requiring a HPET ACPI table is in my opinion not a valid reason to always expose that table - respective tests should be run with "hpet=1" in the guest config file. The problem here is that at least with qemu-traditional, which by default doesn''t appear to emulate a HPET, the advertising here can mislead an OS to believe that there actually is a usable HPET,

> Date: Fri, 17 Feb 2012 12:06:05 +0000 > From: Ian Campbell <Ian.Campbell@citrix.com> > To: Qrux <qrux.qed@gmail.com> > Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com> > Subject: Re: [Xen-devel] Xen domU Timekeeping (a.k.a TSC/HPET issues) > Message-ID: <1329480365.3131.50.camel@zakaz.uk.xensource.com> > Content-Type: