Hi Marc,
> -Original Message-
> From: Marc Zyngier
> Sent: Tuesday, February 2, 2021 10:15 PM
> To: Jianyong Wu
> Cc: net...@vger.kernel.org; yangbo...@nxp.com; john.stu...@linaro.org;
> t...@linutronix.de; pbonz...@redhat.com; richardcoch...@gmail.com; Mark
> Rutl
...@kernel.org;
Suzuki Poulose ; Andre Przywara
; Steven Price ; Lorenzo
Pieralisi ; Sudeep Holla
Cc: linux-kernel@vger.kernel.org; linux-arm-ker...@lists.infradead.org;
kvm...@lists.cs.columbia.edu; k...@vger.kernel.org; Steve Capper
; Justin He ; Jianyong Wu
; kernel-t...@android.com
Subject: [PATCH
Poulose ; Andre Przywara
; Steven Price ; Lorenzo
Pieralisi ; Sudeep Holla
Cc: linux-kernel@vger.kernel.org; linux-arm-ker...@lists.infradead.org;
kvm...@lists.cs.columbia.edu; k...@vger.kernel.org; Steve Capper
; Justin He ; Jianyong Wu
; kernel-t...@android.com; Mark Rutland
Subject: [PATCH
From: Will Deacon
We can advertise ourselves to guests as KVM and provide a basic features
bitmap for discoverability of future hypervisor services.
Cc: Marc Zyngier
Signed-off-by: Will Deacon
Signed-off-by: Jianyong Wu
---
arch/arm64/kvm/hypercalls.c | 27 ++-
1
arate ptp_kvm code for arm64 into hypervisor part and
guest part.
(4) add API to expose monotonic clock and counter value.
(5) refine code: remove no necessary part and reconsitution.
[1] https://patchwork.kernel.org/cover/11373351/
Jianyong Wu (6):
ptp: Reorganize ptp_kvm
Currently, ptp_kvm modules implementation is only for x86 which includes
large part of arch-specific code. This patch moves all of this code
into a new arch related file in the same directory.
Signed-off-by: Jianyong Wu
---
drivers/ptp/Makefile| 1 +
drivers/ptp
take the snapshot and act accordingly.
Signed-off-by: Thomas Gleixner
Signed-off-by: Jianyong Wu
---
include/linux/clocksource.h | 6 ++
include/linux/clocksource_ids.h | 11 +++
include/linux/timekeeping.h | 12 +++-
kernel/time/clocksource.c | 2 ++
kernel
Add clocksource id for arm arch counter to let it be identified easily and
elegantly in ptp_kvm implementation for arm.
Signed-off-by: Jianyong Wu
---
drivers/clocksource/arm_arch_timer.c | 2 ++
include/linux/clocksource_ids.h | 1 +
2 files changed, 3 insertions(+)
diff --git a/drivers
PTP_KVM implementation depends on hypercall using SMCCC. So we
introduce a new SMCCC service ID. This doc explains how does the
ID define and how does PTP_KVM works on arm/arm64.
Signed-off-by: Jianyong Wu
---
Documentation/virt/kvm/api.rst | 9 +++
Documentation/virt/kvm/arm
-4ns
* PHC00 3 377 8 +4ns[ +5ns] +/-4ns
The PHC0 is the ptp clock which choose the host clock as its source
clock. So we can see that the clock difference between host and guest
is in order of ns.
Signed-off-by: Jianyong Wu
---
drivers/clocksource/arm_ar
Let userspace check if there is kvm ptp service in host.
Before VMs migrate to another host, VMM may check if this
cap is available to determine the next behavior.
Signed-off-by: Jianyong Wu
Suggested-by: Marc Zyngier
---
arch/arm64/kvm/arm.c | 1 +
include/uapi/linux/kvm.h | 1 +
2 files
tible with KVM. Once this has been established,
additional services can be discovered via a feature bitmap.
Change from Jianyong Wu:
mv kvm_arm_hyp_service_available to common place to let both arm/arm64 touch it.
add kvm_init_hyp_services also under arm arch to let arm kvm guest use this
service.
ptp_kvm will get this service through SMCC call.
The service offers wall time and cycle count of host to guest.
The caller must specify whether they want the host cycle count
or the difference between host cycle count and cntvoff.
Signed-off-by: Jianyong Wu
---
arch/arm64/kvm/hypercalls.c | 59
Hi Marc,
> -Original Message-
> From: Marc Zyngier
> Sent: Monday, November 23, 2020 7:59 PM
> To: Jianyong Wu
> Cc: Justin He ; k...@vger.kernel.org;
> net...@vger.kernel.org; richardcoch...@gmail.com; linux-
> ker...@vger.kernel.org; sean.j.christopher...@in
Hi Marc,
> -Original Message-
> From: Marc Zyngier
> Sent: Monday, November 23, 2020 6:44 PM
> To: Jianyong Wu
> Cc: net...@vger.kernel.org; yangbo...@nxp.com; john.stu...@linaro.org;
> t...@linutronix.de; pbonz...@redhat.com; sean.j.christopher...@intel.com;
> ric
Hi Marc,
> -Original Message-
> From: Marc Zyngier
> Sent: Monday, November 23, 2020 6:58 PM
> To: Jianyong Wu
> Cc: net...@vger.kernel.org; yangbo...@nxp.com; john.stu...@linaro.org;
> t...@linutronix.de; pbonz...@redhat.com; sean.j.christopher...@intel.com;
> ric
Hi Marc,
> -Original Message-
> From: Marc Zyngier
> Sent: Monday, November 23, 2020 6:49 PM
> To: Jianyong Wu
> Cc: net...@vger.kernel.org; yangbo...@nxp.com; john.stu...@linaro.org;
> t...@linutronix.de; pbonz...@redhat.com; sean.j.christopher...@intel.com;
> ric
Hi Marc,
> -Original Message-
> From: Marc Zyngier
> Sent: Tuesday, November 24, 2020 5:07 PM
> To: Jianyong Wu
> Cc: net...@vger.kernel.org; yangbo...@nxp.com; john.stu...@linaro.org;
> t...@linutronix.de; pbonz...@redhat.com; sean.j.christopher...@intel.com;
> ric
Hi Marc,
> -Original Message-
> From: Marc Zyngier
> Sent: Tuesday, November 24, 2020 5:05 PM
> To: Jianyong Wu
> Cc: net...@vger.kernel.org; yangbo...@nxp.com; john.stu...@linaro.org;
> t...@linutronix.de; pbonz...@redhat.com; sean.j.christopher...@intel.com;
> ric
Ping...
Any comments? Thanks!
> -Original Message-
> From: Jianyong Wu
> Sent: Wednesday, December 9, 2020 2:09 PM
> To: net...@vger.kernel.org; yangbo...@nxp.com; john.stu...@linaro.org;
> t...@linutronix.de; pbonz...@redhat.com; sean.j.christopher...@intel.com;
&g
Hi,
Ping ...
Any comments?
> -Original Message-
> From: Jianyong Wu
> Sent: Wednesday, November 11, 2020 2:22 PM
> To: net...@vger.kernel.org; yangbo...@nxp.com; john.stu...@linaro.org;
> t...@linutronix.de; pbonz...@redhat.com; sean.j.christopher...@intel.com;
&g
p;id=125ea89e4a21e2fc5235410f966a996a1a7148bf
[2]https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git/
commit/?h=kvm/hvc&id=464f5a1741e5959c3e4d2be1966ae0093b4dce06
[3]https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git/
commit/?h=kvm/hvc&id=6597490e005d0eeca8ed8c1c1d7b4318ee014681
Jianyong Wu (
host and guest
is in order of ns.
Signed-off-by: Jianyong Wu
---
arch/arm64/include/asm/arch_timer.h | 3 ++
arch/arm64/kvm/arch_ptp_kvm.c| 76
drivers/clocksource/arm_arch_timer.c | 6 ++-
drivers/ptp/Kconfig | 2 +-
include/li
Currently, ptp_kvm modules implementation is only for x86 which includs
large part of arch-specific code. This patch move all of those code
into related arch directory.
Signed-off-by: Jianyong Wu
---
arch/x86/kvm/arch_ptp_kvm.c | 92
drivers/ptp/Makefile
If arm_smccc_1_1_invoke used in modules, psci_ops.conduit should
be export.
Signed-off-by: Jianyong Wu
---
drivers/firmware/psci/psci.c | 6 ++
include/linux/arm-smccc.h| 2 +-
include/linux/psci.h | 1 +
3 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers
ommit/?h=kvm/hvc&id=6597490e005d0eeca8ed8c1c1d7b4318ee014681
Jianyong Wu (6):
Export psci_ops.conduit symbol as modules will use it.
reorganize ptp_kvm modules to make it arch-independent.
Timer: expose monotonic clock and counter value
arm64: Add hvc call service for ptp_kvm.
Enable
If arm_smccc_1_1_invoke used in modules, psci_ops.conduit should
be export.
Signed-off-by: Jianyong Wu
---
drivers/firmware/psci/psci.c | 6 ++
include/linux/arm-smccc.h| 2 +-
include/linux/psci.h | 1 +
3 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers
counter value.
Signed-off-by: Marc Zyngier
Signed-off-by: Jianyong Wu
---
include/linux/timekeeping.h | 3 +++
kernel/time/timekeeping.c | 13 +
2 files changed, 16 insertions(+)
diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h
index a8ab0f143ac4
Currently, ptp_kvm modules implementation is only for x86 which includs
large part of arch-specific code. This patch move all of those code
into related arch directory.
Signed-off-by: Jianyong Wu
---
drivers/ptp/Makefile | 1 +
drivers/ptp/{ptp_kvm.c => kvm_ptp.c} |
host and guest
is in order of ns.
Signed-off-by: Jianyong Wu
---
drivers/ptp/Kconfig | 2 +-
drivers/ptp/kvm_ptp.c | 2 +-
drivers/ptp/ptp_kvm_arm64.c | 82 +
3 files changed, 84 insertions(+), 2 deletions(-)
create mode 100644 drivers/ptp/
This patch is the base of ptp_kvm for arm64.
ptp_kvm modules will call hvc to get this service.
The service offers real time and counter cycle of host for guest.
Signed-off-by: Jianyong Wu
---
include/linux/arm-smccc.h | 12
virt/kvm/arm/psci.c | 17 +
2 files
Let userspace check if there is kvm ptp service in host.
before VMs migrate to a another host, VMM may check if this
cap is available to determine the migration behaviour.
Signed-off-by: Jianyong Wu
Suggested-by: Marc Zyngier
---
include/uapi/linux/kvm.h | 1 +
virt/kvm/arm/arm.c | 1
c&id=464f5a1741e5959c3e4d2be1966ae0093b4dce06
[3]https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git/
commit/?h=kvm/hvc&id=6597490e005d0eeca8ed8c1c1d7b4318ee014681
Jianyong Wu (6):
psci: Export psci_ops.conduit symbol as modules will use it.
ptp: Reorganize ptp_kvm modules to make it arch
If arm_smccc_1_1_invoke used in modules, psci_ops.conduit should
be export.
Signed-off-by: Jianyong Wu
---
drivers/firmware/psci/psci.c | 6 ++
include/linux/arm-smccc.h| 2 +-
include/linux/psci.h | 1 +
3 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers
host and guest
is in order of ns.
Signed-off-by: Jianyong Wu
---
drivers/ptp/Kconfig | 2 +-
drivers/ptp/kvm_ptp.c | 2 +-
drivers/ptp/ptp_kvm_arm64.c | 82 +
3 files changed, 84 insertions(+), 2 deletions(-)
create mode 100644 drivers/ptp/
This patch is the base of ptp_kvm for arm64.
ptp_kvm modules will call hvc to get this service.
The service offers real time and counter cycle of host for guest.
Signed-off-by: Jianyong Wu
---
include/linux/arm-smccc.h | 12
virt/kvm/arm/psci.c | 17 +
2 files
nic clock as well as its counter value.
>From Jianyong Wu: export this API then modules can use it.
Signed-off-by: Marc Zyngier
Signed-off-by: Jianyong Wu
---
include/linux/timekeeping.h | 3 +++
kernel/time/timekeeping.c | 13 +
2 files changed, 16 insertions(+)
diff --git a/i
Let userspace check if there is kvm ptp service in host.
before VMs migrate to a another host, VMM may check if this
cap is available to determine the migration behaviour.
Signed-off-by: Jianyong Wu
Suggested-by: Marc Zyngier
---
include/uapi/linux/kvm.h | 1 +
virt/kvm/arm/arm.c | 1
Currently, ptp_kvm modules implementation is only for x86 which includs
large part of arch-specific code. This patch move all of those code
into sole arch related file in the same directory.
Signed-off-by: Jianyong Wu
---
drivers/ptp/Makefile | 1 +
drivers/ptp/{ptp_kvm.c
On 2020/4/30 6:36 PM, Mark Rutland wrote:
> On Tue, Apr 28, 2020 at 07:14:52AM +0100, Jianyong Wu wrote:
>> On 2020/4/24 6:39 PM, Mark Rutland wrote:
>>> On Fri, Apr 24, 2020 at 03:50:22AM +0100, Jianyong Wu wrote:
>>>> On 2020/4/21 5:57 PM, Mark Rutland wrote:
>&
Hi Sudeep,
> -Original Message-
> From: Sudeep Holla
> Sent: Tuesday, May 26, 2020 6:10 PM
> To: Jianyong Wu
> Cc: net...@vger.kernel.org; yangbo...@nxp.com; john.stu...@linaro.org;
> t...@linutronix.de; pbonz...@redhat.com; sean.j.christopher...@intel.com;
Hi Steven,
> -Original Message-
> From: Steven Price
> Sent: Tuesday, May 26, 2020 7:02 PM
> To: Jianyong Wu ; net...@vger.kernel.org;
> yangbo...@nxp.com; john.stu...@linaro.org; t...@linutronix.de;
> pbonz...@redhat.com; sean.j.christopher...@intel.com; m...@kernel.
Hi Dominique,
> -Original Message-
> From: Dominique Martinet
> Sent: Thursday, July 2, 2020 3:56 PM
> To: Jianyong Wu
> Cc: eri...@gmail.com; lu...@ionkov.net; v9fs-
> develo...@lists.sourceforge.net; linux-kernel@vger.kernel.org; Steve
> Capper ; Kaly Xin ; J
("tmp", O_RDWR);
ftruncate(fd, 10);
The file context related with the fd will be lost as fid is
retrieved from dentry, then the backend can't get the info of
file context. It is against the original intention of user and
may lead to bug.
Signed-off-by: Jianyong Wu
---
fs/9p/
tible with KVM. Once this has been established,
additional services can be discovered via a feature bitmap.
Cc: Marc Zyngier
Signed-off-by: Will Deacon
Signed-off-by: Jianyong Wu
---
arch/arm64/include/asm/hypervisor.h | 11 +
arch/arm64/kernel/setup.c
refine code: remove no necessary part and reconsitution.
[1] https://patchwork.kernel.org/cover/11373351/
Jianyong Wu (7):
arm/arm64: KVM: Advertise KVM UID to guests via SMCCC
smccc: export smccc conduit get helper.
ptp: Reorganize ptp_kvm modules to make it arch-independent.
clocksource: Add
From: Will Deacon
We can advertise ourselves to guests as KVM and provide a basic features
bitmap for discoverability of future hypervisor services.
Cc: Marc Zyngier
Signed-off-by: Will Deacon
Signed-off-by: Jianyong Wu
---
arch/arm64/kvm/hypercalls.c | 29 +++--
1
Export arm_smccc_1_1_get_conduit then modules can use smccc helper which
adopts it.
Acked-by: Mark Rutland
Signed-off-by: Jianyong Wu
---
drivers/firmware/smccc/smccc.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/firmware/smccc/smccc.c b/drivers/firmware/smccc/smccc.c
index
take the snapshot and act accordingly.
Signed-off-by: Thomas Gleixner
Signed-off-by: Jianyong Wu
---
include/linux/clocksource.h | 6 ++
include/linux/clocksource_ids.h | 11 +++
include/linux/timekeeping.h | 12 +++-
kernel/time/clocksource.c | 3 +++
kernel
Let userspace check if there is kvm ptp service in host.
Before VMs migrate to another host, VMM may check if this
cap is available to determine the next behavior.
Signed-off-by: Jianyong Wu
Suggested-by: Marc Zyngier
---
arch/arm64/kvm/arm.c | 4
include/uapi/linux/kvm.h | 1 +
2
-4ns
* PHC00 3 377 8 +4ns[ +5ns] +/-4ns
The PHC0 is the ptp clock which choose the host clock as its source
clock. So we can see that the clock difference between host and guest
is in order of ns.
Signed-off-by: Jianyong Wu
---
drivers/clocksource/arm_ar
Add clocksource id for arm arch counter to let it be identified easily and
elegantly in ptp_kvm implementation for arm.
Signed-off-by: Jianyong Wu
---
drivers/clocksource/arm_arch_timer.c | 2 ++
include/linux/clocksource_ids.h | 1 +
2 files changed, 3 insertions(+)
diff --git a/drivers
ptp_kvm will get this service through smccc call.
The service offers wall time and counter cycle of host for guest.
caller must explicitly determines which cycle of virtual counter or
physical counter to return if it needs counter cycle.
Signed-off-by: Jianyong Wu
---
arch/arm64/kvm/Kconfig
Currently, ptp_kvm modules implementation is only for x86 which includs
large part of arch-specific code. This patch move all of those code
into new arch related file in the same directory.
Signed-off-by: Jianyong Wu
---
drivers/ptp/Makefile| 1 +
drivers/ptp/ptp_kvm.h
refine code: remove no necessary part and reconsitution.
[1] https://patchwork.kernel.org/cover/11373351/
Jianyong Wu (7):
arm/arm64: KVM: Advertise KVM UID to guests via SMCCC
smccc: export smccc conduit get helper.
ptp: Reorganize ptp_kvm modules to make it arch-independent.
clocksource: Add
tible with KVM. Once this has been established,
additional services can be discovered via a feature bitmap.
Cc: Marc Zyngier
Signed-off-by: Will Deacon
Signed-off-by: Jianyong Wu
---
arch/arm64/include/asm/hypervisor.h | 11 +
arch/arm64/kernel/setup.c
From: Will Deacon
We can advertise ourselves to guests as KVM and provide a basic features
bitmap for discoverability of future hypervisor services.
Cc: Marc Zyngier
Signed-off-by: Will Deacon
Signed-off-by: Jianyong Wu
---
arch/arm64/kvm/hypercalls.c | 29 +++--
1
ptp_kvm will get this service through smccc call.
The service offers wall time and counter cycle of host for guest.
caller must explicitly determines which cycle of virtual counter or
physical counter to return if it needs counter cycle.
Signed-off-by: Jianyong Wu
---
arch/arm64/kvm/Kconfig
Currently, ptp_kvm modules implementation is only for x86 which includs
large part of arch-specific code. This patch move all of those code
into new arch related file in the same directory.
Signed-off-by: Jianyong Wu
---
drivers/ptp/Makefile| 1 +
drivers/ptp/ptp_kvm.h
Let userspace check if there is kvm ptp service in host.
Before VMs migrate to another host, VMM may check if this
cap is available to determine the next behavior.
Signed-off-by: Jianyong Wu
Suggested-by: Marc Zyngier
---
arch/arm64/kvm/arm.c | 4
include/uapi/linux/kvm.h | 1 +
2
-4ns
* PHC00 3 377 8 +4ns[ +5ns] +/-4ns
The PHC0 is the ptp clock which choose the host clock as its source
clock. So we can see that the clock difference between host and guest
is in order of ns.
Signed-off-by: Jianyong Wu
---
drivers/clocksource/arm_ar
Add clocksource id for arm arch counter to let it be identified easily and
elegantly in ptp_kvm implementation for arm.
Signed-off-by: Jianyong Wu
---
drivers/clocksource/arm_arch_timer.c | 2 ++
include/linux/clocksource_ids.h | 1 +
2 files changed, 3 insertions(+)
diff --git a/drivers
take the snapshot and act accordingly.
Signed-off-by: Thomas Gleixner
Signed-off-by: Jianyong Wu
---
include/linux/clocksource.h | 6 ++
include/linux/clocksource_ids.h | 11 +++
include/linux/timekeeping.h | 12 +++-
kernel/time/clocksource.c | 3 +++
kernel
Export arm_smccc_1_1_get_conduit then modules can use smccc helper which
adopts it.
Acked-by: Mark Rutland
Signed-off-by: Jianyong Wu
---
drivers/firmware/smccc/smccc.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/firmware/smccc/smccc.c b/drivers/firmware/smccc/smccc.c
index
Hi steven,
> -Original Message-
> From: Steven Price
> Sent: Monday, June 22, 2020 5:51 PM
> To: Jianyong Wu ; net...@vger.kernel.org;
> yangbo...@nxp.com; john.stu...@linaro.org; t...@linutronix.de;
> pbonz...@redhat.com; sean.j.christopher...@intel.com; m...@kernel.
> -Original Message-
> From: Dominique Martinet
> Sent: Friday, July 10, 2020 7:09 PM
> To: Jianyong Wu
> Cc: eri...@gmail.com; lu...@ionkov.net; v9fs-
> develo...@lists.sourceforge.net; linux-kernel@vger.kernel.org; Steve
> Capper ; Kaly Xin ; Justin He
> ;
Hi Dominique,
> -Original Message-
> From: Dominique Martinet
> Sent: Thursday, September 24, 2020 5:52 PM
> To: Jianyong Wu
> Cc: eri...@gmail.com; lu...@ionkov.net; qemu_...@crudebyte.com;
> gr...@kaod.org; v9fs-develo...@lists.sourceforge.net; linux-
> ker...@vg
Hi Thomas,
> -Original Message-
> From: Thomas Gleixner
> Sent: Friday, May 29, 2020 12:36 AM
> To: Jianyong Wu ; net...@vger.kernel.org;
> yangbo...@nxp.com; john.stu...@linaro.org; pbonz...@redhat.com;
> sean.j.christopher...@intel.com; m...@kernel.org;
> richardco
Hi Marc,
> -Original Message-
> From: Marc Zyngier
> Sent: Monday, May 25, 2020 5:17 PM
> To: Richard Cochran ; Jianyong Wu
>
> Cc: net...@vger.kernel.org; yangbo...@nxp.com; john.stu...@linaro.org;
> t...@linutronix.de; pbonz...@redhat.com; sean.j.christopher
tible with KVM. Once this has been established,
additional services can be discovered via a feature bitmap.
Cc: Marc Zyngier
Signed-off-by: Will Deacon
Signed-off-by: Jianyong Wu
---
arch/arm64/include/asm/hypervisor.h | 11 +
arch/arm64/kernel/setup.c
Export arm_smccc_1_1_get_conduit then modules can use smccc helper which
adopts it.
Acked-by: Mark Rutland
Signed-off-by: Jianyong Wu
---
drivers/firmware/psci/psci.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c
index
From: Will Deacon
We can advertise ourselves to guests as KVM and provide a basic features
bitmap for discoverability of future hypervisor services.
Cc: Marc Zyngier
Signed-off-by: Will Deacon
Signed-off-by: Jianyong Wu
---
virt/kvm/arm/hypercalls.c | 29 +++--
1
ptp_kvm service is
available.
(3) separate ptp_kvm code for arm64 into hypervisor part and
guest part.
(4) add API to expose monotonic clock and counter value.
(5) refine code: remove no necessary part and reconsitution.
[1] https://patchwork.kernel.org/cover/11373351/
Jian
Currently, ptp_kvm modules implementation is only for x86 which includs
large part of arch-specific code. This patch move all of those code
into new arch related file in the same directory.
Signed-off-by: Jianyong Wu
---
drivers/ptp/Makefile| 1 +
drivers/ptp/ptp_kvm.h
Add clocksource id for arm arch counter to let it be identified easily and
elegantly in ptp_kvm implementation for arm.
Signed-off-by: Jianyong Wu
---
drivers/clocksource/arm_arch_timer.c | 2 ++
include/linux/clocksource_ids.h | 1 +
2 files changed, 3 insertions(+)
diff --git a/drivers
take the snapshot and act accordingly.
Signed-off-by: Thomas Gleixner
Signed-off-by: Jianyong Wu
---
include/linux/clocksource.h | 6 ++
include/linux/clocksource_ids.h | 11 +++
include/linux/timekeeping.h | 12 +++-
kernel/time/clocksource.c | 3 +++
kernel
ptp_kvm modules will get this service through smccc call.
The service offers real time and counter cycle of host for guest.
Also let caller determine which cycle of virtual counter or physical counter
to return.
Signed-off-by: Jianyong Wu
---
include/linux/arm-smccc.h | 14
virt
return by default.
Signed-off-by: Jianyong Wu
Suggested-by: Marc Zyngier
---
drivers/clocksource/arm_arch_timer.c | 13 -
drivers/ptp/ptp_chardev.c| 25 +
drivers/ptp/ptp_kvm_common.c | 7 ---
include/uapi/linux/ptp_clock.h | 4
Let userspace check if there is kvm ptp service in host.
Before VMs migrate to another host, VMM may check if this
cap is available to determine the next behavior.
Signed-off-by: Jianyong Wu
Suggested-by: Marc Zyngier
---
include/uapi/linux/kvm.h | 1 +
virt/kvm/arm/arm.c | 1 +
2 files
-4ns
* PHC00 3 377 8 +4ns[ +5ns] +/-4ns
The PHC0 is the ptp clock which choose the host clock as its source
clock. So we can be sure to say that the clock error between host and guest
is in order of ns.
Signed-off-by: Jianyong Wu
---
drivers/clocksource/arm_ar
sometimes we may need tell getcrosstimestamp call back how to perform
itself. Extending input arguments for getcrosstimestamp API to offer more
exquisite control for the operation.
Signed-off-by: Jianyong Wu
---
drivers/clocksource/arm_arch_timer.c| 2 +-
drivers/net/ethernet/intel/e1000e
Hi Sudeep,
> -Original Message-
> From: Sudeep Holla
> Sent: Friday, May 22, 2020 9:12 PM
> To: Jianyong Wu
> Cc: net...@vger.kernel.org; yangbo...@nxp.com; john.stu...@linaro.org;
> t...@linutronix.de; pbonz...@redhat.com; sean.j.christopher...@intel.com;
> m...@ke
Hi Steven,
> -Original Message-
> From: Steven Price
> Sent: Friday, May 22, 2020 10:18 PM
> To: Jianyong Wu ; net...@vger.kernel.org;
> yangbo...@nxp.com; john.stu...@linaro.org; t...@linutronix.de;
> pbonz...@redhat.com; sean.j.christopher...@intel.com; m...@kernel.
Hi Richard,
> -Original Message-
> From: Richard Cochran
> Sent: Sunday, May 24, 2020 10:11 AM
> To: Jianyong Wu
> Cc: net...@vger.kernel.org; yangbo...@nxp.com; john.stu...@linaro.org;
> t...@linutronix.de; pbonz...@redhat.com; sean.j.christopher...@intel.com;
>
Hi Richard,
> -Original Message-
> From: Richard Cochran
> Sent: Monday, May 25, 2020 2:16 PM
> To: Jianyong Wu
> Cc: m...@kernel.org; net...@vger.kernel.org; yangbo...@nxp.com;
> john.stu...@linaro.org; t...@linutronix.de; pbonz...@redhat.com;
> sean.j.christoph
separate ptp_kvm code for arm64 into hypervisor part and
guest part.
(4) add API to expose monotonic clock and counter value.
(5) refine code: remove no necessary part and reconsitution.
[1] https://patchwork.kernel.org/cover/11373351/
Jianyong Wu (9):
arm64: Probe for the pres
tible with KVM. Once this has been established,
additional services can be discovered via a feature bitmap.
Cc: Marc Zyngier
Signed-off-by: Will Deacon
Signed-off-by: Jianyong Wu
---
arch/arm64/include/asm/hypervisor.h | 11 +
arch/arm64/kernel/setup.c
From: Will Deacon
We can advertise ourselves to guests as KVM and provide a basic features
bitmap for discoverability of future hypervisor services.
Cc: Marc Zyngier
Signed-off-by: Will Deacon
Signed-off-by: Jianyong Wu
---
arch/arm64/kvm/hypercalls.c | 29 +++--
1
Export arm_smccc_1_1_get_conduit then modules can use smccc helper which
adopts it.
Acked-by: Mark Rutland
Signed-off-by: Jianyong Wu
---
drivers/firmware/smccc/smccc.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/firmware/smccc/smccc.c b/drivers/firmware/smccc/smccc.c
index
ptp_kvm will get this service through smccc call.
The service offers wall time and counter cycle of host for guest.
caller must explicitly determines which cycle of virtual counter or
physical counter to return if it needs counter cycle.
Signed-off-by: Jianyong Wu
---
arch/arm64/kvm/Kconfig
Currently, ptp_kvm modules implementation is only for x86 which includs
large part of arch-specific code. This patch move all of those code
into new arch related file in the same directory.
Signed-off-by: Jianyong Wu
---
drivers/ptp/Makefile| 5 ++
drivers/ptp
Add clocksource id for arm arch counter to let it be identified easily and
elegantly in ptp_kvm implementation for arm.
Signed-off-by: Jianyong Wu
---
drivers/clocksource/arm_arch_timer.c | 2 ++
include/linux/clocksource_ids.h | 1 +
2 files changed, 3 insertions(+)
diff --git a/drivers
-4ns
* PHC00 3 377 8 +4ns[ +5ns] +/-4ns
The PHC0 is the ptp clock which choose the host clock as its source
clock. So we can see that the clock difference between host and guest
is in order of ns.
Signed-off-by: Jianyong Wu
---
drivers/clocksource/arm_ar
Let userspace check if there is kvm ptp service in host.
Before VMs migrate to another host, VMM may check if this
cap is available to determine the next behavior.
Signed-off-by: Jianyong Wu
Suggested-by: Marc Zyngier
---
arch/arm64/kvm/arm.c | 4
include/uapi/linux/kvm.h | 1 +
2
ptp_kvm implementation depends on hypercall using SMCCC. So we
introduce a new SMCCC service ID. This doc explain how we define
and use this new ID.
Signed-off-by: Jianyong Wu
---
Documentation/virt/kvm/arm/ptp_kvm.rst | 72 ++
1 file changed, 72 insertions(+)
create
take the snapshot and act accordingly.
Signed-off-by: Thomas Gleixner
Signed-off-by: Jianyong Wu
---
include/linux/clocksource.h | 6 ++
include/linux/clocksource_ids.h | 11 +++
include/linux/timekeeping.h | 12 +++-
kernel/time/clocksource.c | 2 ++
kernel
Hi Marc,
> -Original Message-
> From: Marc Zyngier
> Sent: Saturday, September 5, 2020 12:19 AM
> To: Jianyong Wu
> Cc: net...@vger.kernel.org; yangbo...@nxp.com; john.stu...@linaro.org;
> t...@linutronix.de; pbonz...@redhat.com; sean.j.christopher...@intel.
Hi Marc,
> -Original Message-
> From: Marc Zyngier
> Sent: Saturday, September 5, 2020 12:15 AM
> To: Jianyong Wu
> Cc: net...@vger.kernel.org; yangbo...@nxp.com; john.stu...@linaro.org;
> t...@linutronix.de; pbonz...@redhat.com; sean.j.christopher...@intel.
Hi Marc,
> -Original Message-
> From: Marc Zyngier
> Sent: Saturday, September 5, 2020 7:04 PM
> To: Jianyong Wu
> Cc: net...@vger.kernel.org; yangbo...@nxp.com; john.stu...@linaro.org;
> t...@linutronix.de; pbonz...@redhat.com; sean.j.christopher...@intel.
Hi Marc,
> -Original Message-
> From: Marc Zyngier
> Sent: Saturday, September 5, 2020 7:02 PM
> To: Jianyong Wu
> Cc: net...@vger.kernel.org; yangbo...@nxp.com; john.stu...@linaro.org;
> t...@linutronix.de; pbonz...@redhat.com; sean.j.christopher...@intel.
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