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[PATCH v3 0/3] x86/xen: pvclock vdso support

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  [PATCH v3 0/3] x86/xen: pvclock vdso support Joao Martins <joao.m.martins@oracle.com> - 2017-09-27 14:10 +0200
    [PATCH v3 3/3] MAINTAINERS: xen, kvm: track pvclock-abi.h changes Joao Martins <joao.m.martins@oracle.com> - 2017-09-27 14:10 +0200

#1740653 — [PATCH v3 0/3] x86/xen: pvclock vdso support

Hey,

This take 3 for vdso for Xen. PVCLOCK_TSC_STABLE_BIT can be set starting Xen
 4.8 which is required for vdso time related calls. In order to have it on, you
need to have the hypervisor clocksource be TSC e.g. with the following boot
params "clocksource=tsc tsc=stable:socket".

Series is structured as following:

Patch 1 streamlines pvti page get/set in pvclock for both of its users
Patch 2 registers the pvti page on Xen and sets it in pvclock accordingly
Patch 3 adds a file to KVM/Xen maintainers for tracking pvclock ABI changes.

Changelog is included in individual patches.
(only patch 2 changed in this version)

Thanks,
Joao

Joao Martins (3):
  x86/pvclock: add setter for pvclock_pvti_cpu0_va
  x86/xen/time: setup vcpu 0 time info page
  MAINTAINERS: xen, kvm: track pvclock-abi.h changes

 MAINTAINERS                    |   2 +
 arch/x86/include/asm/pvclock.h |  19 ++++----
 arch/x86/kernel/kvmclock.c     |   7 +--
 arch/x86/kernel/pvclock.c      |  14 ++++++
 arch/x86/xen/suspend.c         |   4 ++
 arch/x86/xen/time.c            | 100 +++++++++++++++++++++++++++++++++++++++++
 arch/x86/xen/xen-ops.h         |   2 +
 include/xen/interface/vcpu.h   |  42 +++++++++++++++++
 8 files changed, 175 insertions(+), 15 deletions(-)

-- 
2.11.0

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#1740654 — [PATCH v3 3/3] MAINTAINERS: xen, kvm: track pvclock-abi.h changes

This file defines an ABI shared between guest and hypervisor(s)
(KVM, Xen) and as such there should be an correspondent entry in
MAINTAINERS file. Notice that there's already a text notice at the
top of the header file, hence this commit simply enforces it more
explicitly and have both peers noticed when such changes happen.

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Acked-by: Juergen Gross <jgross@suse.com>
---
In the end, I choose the originally posted because this is so far the
only ABI shared between Xen/KVM. Therefore whenever we have more things
shared it would deserve its own place in MAINTAINERS file. If the
thinking is wrong, I can switch to the alternative with a
"PARAVIRT ABIS" section.

Changes since v1:
 * Add Juergen Gross Acked-by.
---
 MAINTAINERS | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 6671f375f7fc..a4834c3c377a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7603,6 +7603,7 @@ S:	Supported
 F:	arch/x86/kvm/
 F:	arch/x86/include/uapi/asm/kvm*
 F:	arch/x86/include/asm/kvm*
+F:	arch/x86/include/asm/pvclock-abi.h
 F:	arch/x86/kernel/kvm.c
 F:	arch/x86/kernel/kvmclock.c
 
@@ -14718,6 +14719,7 @@ F:	arch/x86/xen/
 F:	drivers/*/xen-*front.c
 F:	drivers/xen/
 F:	arch/x86/include/asm/xen/
+F:	arch/x86/include/asm/pvclock-abi.h
 F:	include/xen/
 F:	include/uapi/xen/
 F:	Documentation/ABI/stable/sysfs-hypervisor-xen
-- 
2.11.0

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