linux-stable.git/arch/x86/kernel/pvclock.c, branch linux-3.9.y

x86/kvm: Fix pvclock vsyscall fixmap

2013-02-28T06:50:11+00:00

The physical memory fixmapped for the pvclock clock_gettime vsyscall
was allocated, and thus is not a kernel symbol. __pa() is the proper
method to use in this case.

Fixes the crash below when booting a next-20130204+ smp guest on a
3.8-rc5+ KVM host.

[    0.666410] udevd[97]: starting version 175
[    0.674043] udevd[97]: udevd:[97]: segfault at ffffffffff5fd020
     ip 00007fff069e277f sp 00007fff068c9ef8 error d

Acked-by: Marcelo Tosatti 
Signed-off-by: Peter Hurley 
Signed-off-by: Gleb Natapov

x86: pvclock: generic pvclock vsyscall initialization

2012-11-28T01:29:09+00:00

Originally from Jeremy Fitzhardinge.

Introduce generic, non hypervisor specific, pvclock initialization
routines.

Signed-off-by: Marcelo Tosatti

x86: pvclock: introduce helper to read flags

2012-11-28T01:29:08+00:00

Acked-by: Glauber Costa 
Signed-off-by: Marcelo Tosatti

x86: pvclock: create helper for pvclock data retrieval

2012-11-28T01:29:07+00:00

Originally from Jeremy Fitzhardinge.

So code can be reused.

Acked-by: Glauber Costa 
Signed-off-by: Marcelo Tosatti

x86: pvclock: remove pvclock_shadow_time

2012-11-28T01:29:06+00:00

Originally from Jeremy Fitzhardinge.

We can copy the information directly from "struct pvclock_vcpu_time_info",
remove pvclock_shadow_time.

Reviewed-by: Glauber Costa 
Signed-off-by: Marcelo Tosatti

x86: pvclock: make sure rdtsc doesnt speculate out of region

2012-11-28T01:29:06+00:00

Originally from Jeremy Fitzhardinge.

pvclock_get_time_values, which contains the memory barriers
will be removed by next patch.

Signed-off-by: Marcelo Tosatti

x86/pvclock: Zero last_value on resume

2010-11-28T08:33:20+00:00

If the guest domain has been suspend/resumed or migrated, then the
system clock backing the pvclock clocksource may revert to a smaller
value (ie, can be non-monotonic across the migration/save-restore).

Make sure we zero last_value in that case so that the domain
continues to see clock updates.

Signed-off-by: Jeremy Fitzhardinge 
Signed-off-by: Ingo Molnar

x86, pvclock: Remove leftover scale_delta() function

2010-11-10T09:32:15+00:00

Commit 92580d64e16402762e2acc3022f065397c780425
("x86: pvclock: Move scale_delta into common header")
forgot to remove scale_delta.

Signed-off-by: Kusanagi Kouichi 
Cc: Zachary Amsden 
Cc: Marcelo Tosatti 
Cc: Glauber Costa 
LKML-Reference: <20101105110444.BAF6D6FC03B@msa105.auone-net.jp>
Signed-off-by: Ingo Molnar

x86: pvclock: Move scale_delta into common header

2010-10-24T08:51:24+00:00

The scale_delta function for shift / multiply with 31-bit
precision moves to a common header so it can be used by both
kernel and kvm module.

Signed-off-by: Zachary Amsden 
Signed-off-by: Marcelo Tosatti

x86, paravirt: don't compute pvclock adjustments if we trust the tsc

2010-05-19T08:41:05+00:00

If the HV told us we can fully trust the TSC, skip any
correction

Signed-off-by: Glauber Costa 
Acked-by: Zachary Amsden 
Signed-off-by: Marcelo Tosatti