From: Marcelo Tosatti <mtosatti@redhat.com>
To: mingo@kernel.org, kvm@vger.kernel.org
Cc: johnstul@us.ibm.com, jeremy@goop.org, glommer@parallels.com,
Marcelo Tosatti <mtosatti@redhat.com>
Subject: [patch 06/18] x86: pvclock: introduce helper to read flags
Date: Mon, 19 Nov 2012 19:58:04 -0200 [thread overview]
Message-ID: <20121119215958.933060734@redhat.com> (raw)
In-Reply-To: 20121119215758.686768790@redhat.com
[-- Attachment #1: 05-pvclock-add-get-flags --]
[-- Type: text/plain, Size: 1325 bytes --]
Acked-by: Glauber Costa <glommer@parallels.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Index: vsyscall/arch/x86/kernel/pvclock.c
===================================================================
--- vsyscall.orig/arch/x86/kernel/pvclock.c
+++ vsyscall/arch/x86/kernel/pvclock.c
@@ -45,6 +45,19 @@ void pvclock_resume(void)
atomic64_set(&last_value, 0);
}
+u8 pvclock_read_flags(struct pvclock_vcpu_time_info *src)
+{
+ unsigned version;
+ cycle_t ret;
+ u8 flags;
+
+ do {
+ version = __pvclock_read_cycles(src, &ret, &flags);
+ } while ((src->version & 1) || version != src->version);
+
+ return flags & valid_flags;
+}
+
cycle_t pvclock_clocksource_read(struct pvclock_vcpu_time_info *src)
{
unsigned version;
Index: vsyscall/arch/x86/include/asm/pvclock.h
===================================================================
--- vsyscall.orig/arch/x86/include/asm/pvclock.h
+++ vsyscall/arch/x86/include/asm/pvclock.h
@@ -6,6 +6,7 @@
/* some helper functions for xen and kvm pv clock sources */
cycle_t pvclock_clocksource_read(struct pvclock_vcpu_time_info *src);
+u8 pvclock_read_flags(struct pvclock_vcpu_time_info *src);
void pvclock_set_flags(u8 flags);
unsigned long pvclock_tsc_khz(struct pvclock_vcpu_time_info *src);
void pvclock_read_wallclock(struct pvclock_wall_clock *wall,
next prev parent reply other threads:[~2012-11-19 21:58 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-15 0:08 [patch 00/18] pvclock vsyscall support + KVM hypervisor support (v4) Marcelo Tosatti
2012-11-15 0:08 ` [patch 01/18] KVM: x86: retain pvclock guest stopped bit in guest memory Marcelo Tosatti
2012-11-15 0:08 ` [patch 02/18] x86: kvmclock: allocate pvclock shared memory area Marcelo Tosatti
2012-11-15 17:05 ` Glauber Costa
2012-11-16 2:07 ` [patch 02/18] x86: kvmclock: allocate pvclock shared memory area (v2) Marcelo Tosatti
2012-11-16 7:06 ` Glauber Costa
2012-11-15 0:08 ` [patch 03/18] x86: pvclock: make sure rdtsc doesnt speculate out of region Marcelo Tosatti
2012-11-15 0:08 ` [patch 04/18] x86: pvclock: remove pvclock_shadow_time Marcelo Tosatti
2012-11-15 0:08 ` [patch 05/18] x86: pvclock: create helper for pvclock data retrieval Marcelo Tosatti
2012-11-15 12:27 ` Glauber Costa
2012-11-15 0:08 ` [patch 06/18] x86: pvclock: introduce helper to read flags Marcelo Tosatti
2012-11-15 12:28 ` Glauber Costa
2012-11-15 0:08 ` [patch 07/18] x86: pvclock: add note about rdtsc barriers Marcelo Tosatti
2012-11-15 12:30 ` Glauber Costa
2012-11-16 2:05 ` [patch 07/18] x86: pvclock: add note about rdtsc barriers (v2) Marcelo Tosatti
2012-11-15 0:08 ` [patch 08/18] sched: add notifier for cross-cpu migrations Marcelo Tosatti
2012-11-15 7:01 ` Gleb Natapov
2012-11-15 0:08 ` [patch 09/18] x86: pvclock: generic pvclock vsyscall initialization Marcelo Tosatti
2012-11-15 0:08 ` [patch 10/18] x86: kvm guest: pvclock vsyscall support Marcelo Tosatti
2012-11-15 0:08 ` [patch 11/18] x86: vdso: pvclock gettime support Marcelo Tosatti
2012-11-15 0:08 ` [patch 12/18] KVM: x86: pass host_tsc to read_l1_tsc Marcelo Tosatti
2012-11-15 0:08 ` [patch 13/18] time: export time information for KVM pvclock Marcelo Tosatti
2012-11-15 1:38 ` John Stultz
2012-11-15 0:08 ` [patch 14/18] KVM: x86: notifier for clocksource changes Marcelo Tosatti
2012-11-15 0:08 ` [patch 15/18] KVM: x86: implement PVCLOCK_TSC_STABLE_BIT pvclock flag Marcelo Tosatti
2012-11-15 0:08 ` [patch 16/18] KVM: x86: add kvm_arch_vcpu_postcreate callback, move TSC initialization Marcelo Tosatti
2012-11-15 0:08 ` [patch 17/18] KVM: x86: require matched TSC offsets for master clock Marcelo Tosatti
2012-11-15 0:08 ` [patch 18/18] KVM: x86: update pvclock area conditionally, on cpu migration Marcelo Tosatti
2012-11-15 12:34 ` Glauber Costa
2012-11-19 21:57 ` [patch 00/18] pvclock vsyscall support + KVM hypervisor support (v5) Marcelo Tosatti
2012-11-19 21:57 ` [patch 01/18] KVM: x86: retain pvclock guest stopped bit in guest memory Marcelo Tosatti
2012-11-19 21:58 ` [patch 02/18] x86: kvmclock: allocate pvclock shared memory area Marcelo Tosatti
2012-11-19 21:58 ` [patch 03/18] x86: pvclock: make sure rdtsc doesnt speculate out of region Marcelo Tosatti
2012-11-19 21:58 ` [patch 04/18] x86: pvclock: remove pvclock_shadow_time Marcelo Tosatti
2012-11-19 21:58 ` [patch 05/18] x86: pvclock: create helper for pvclock data retrieval Marcelo Tosatti
2012-11-19 21:58 ` Marcelo Tosatti [this message]
2012-11-19 21:58 ` [patch 07/18] x86: pvclock: add note about rdtsc barriers Marcelo Tosatti
2012-11-19 21:58 ` [patch 08/18] sched: add notifier for cross-cpu migrations Marcelo Tosatti
2012-11-19 21:58 ` [patch 09/18] x86: pvclock: generic pvclock vsyscall initialization Marcelo Tosatti
2012-11-19 21:58 ` [patch 11/18] x86: vdso: pvclock gettime support Marcelo Tosatti
2012-11-19 21:58 ` [patch 12/18] KVM: x86: pass host_tsc to read_l1_tsc Marcelo Tosatti
2012-11-19 21:58 ` [patch 13/18] time: export time information for KVM pvclock Marcelo Tosatti
2012-11-19 21:58 ` [patch 14/18] KVM: x86: notifier for clocksource changes Marcelo Tosatti
2012-11-19 21:58 ` [patch 15/18] KVM: x86: implement PVCLOCK_TSC_STABLE_BIT pvclock flag Marcelo Tosatti
2012-11-19 21:58 ` [patch 16/18] KVM: x86: add kvm_arch_vcpu_postcreate callback, move TSC initialization Marcelo Tosatti
2012-11-19 21:58 ` [patch 17/18] KVM: x86: require matched TSC offsets for master clock Marcelo Tosatti
2012-11-19 21:58 ` [patch 18/18] KVM: x86: update pvclock area conditionally, on cpu migration Marcelo Tosatti
2012-11-20 9:01 ` Glauber Costa
2012-11-20 9:03 ` [patch 00/18] pvclock vsyscall support + KVM hypervisor support (v5) Glauber Costa
-- strict thread matches above, loose matches on Subject: below --
2012-10-24 13:13 [patch 00/18] pvclock vsyscall support + KVM hypervisor support (v2) Marcelo Tosatti
2012-10-24 13:13 ` [patch 06/18] x86: pvclock: introduce helper to read flags Marcelo Tosatti
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