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
...@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
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
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
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
-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
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
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
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
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
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
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
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
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: 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: 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 6:44 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 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,
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
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
-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
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
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
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
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 | 61
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.
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
part and reconsitution.
[1] https://patchwork.kernel.org/cover/11373351/
Jianyong Wu (6):
ptp: Reorganize ptp_kvm module to make it arch-independent.
clocksource: Add clocksource id for arm arch counter
arm64/kvm: Add hypercall service for kvm ptp.
ptp: arm/arm64: Enable ptp_kvm for arm/ar
Hi Dominique,
Good News!
I'm happy to see that you have time to pick this up again. All the changes are
OK for me.
Thanks
Jianyong
> -Original Message-
> From: Dominique Martinet
> Sent: Tuesday, November 3, 2020 6:41 PM
> To: Jianyong Wu
> Cc: eri...@gmail.c
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 Dominique,
> -Original Message-
> From: Dominique Martinet
> Sent: Wednesday, September 23, 2020 10:50 PM
> To: Jianyong Wu
> Cc: eri...@gmail.com; lu...@ionkov.net; qemu_...@crudebyte.com;
> gr...@kaod.org; v9fs-develo...@lists.sourceforge.net; linux-
> k
From: Greg Kurz
This patch adds accounting of open fids in a list hanging off the i_private
field of the corresponding inode. This allows faster lookups compared to
searching the full 9p client list.
The lookup code is modified accordingly.
Signed-off-by: Greg Kurz
Signed-off-by: Jianyong Wu
ergen
(changed v9fs_fid_find_global to v9fs_fid_find_inode in comment)
Signed-off-by: Greg Kurz
Signed-off-by: Jianyong Wu
---
fs/9p/fid.c | 30 ++
fs/9p/vfs_inode.c | 4
net/9p/client.c | 5 -
3 files changed, 38 insertions(+), 1 deletion(-)
diff --
ftruncate fstat fchown fchmod faccessat.
Signed-off-by: Jianyong Wu
---
fs/9p/fid.c | 22 ++
fs/9p/fid.h | 10 +-
fs/9p/vfs_dentry.c | 2 ++
fs/9p/vfs_dir.c | 9 +
fs/9p/vfs_inode.c | 37 +
ftruncate(4, 0) = 0
Signed-off-by: Greg Kurz
Signed-off-by: Jianyong Wu
---
fs/9p/fid.c | 9 +
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/fs/9p/fid.c b/fs/9p/fid.c
index d11dd430590d..0b23b0fe6c51 100644
--- a/fs/9p/fid.c
+++ b/fs/9p/fid.c
@@ -95
e log:
v1 to v2:
(1) in patch 4/4: do fid refcounter down in the clunk helper.
(2) int patch 4/4: remove the enum value denoting from which of the
inode or dentry fids are allcated.
Eric Van Hensbergen (1):
fs/9p: fix create-unlink-getattr idiom
Greg Kurz (1):
fs/9p: search open fids fir
> -Original Message-
> From: Dominique Martinet
> Sent: Friday, September 18, 2020 5:35 PM
> To: Jianyong Wu
> Cc: eri...@gmail.com; lu...@ionkov.net; v9fs-
> develo...@lists.sourceforge.net; linux-kernel@vger.kernel.org; Justin He
> ; Greg Kurz
> Subject: Re:
Hi Dominique,
> -Original Message-
> From: Dominique Martinet
> Sent: Monday, September 14, 2020 4:32 PM
> To: Jianyong Wu
> Cc: eri...@gmail.com; lu...@ionkov.net; v9fs-
> develo...@lists.sourceforge.net; linux-kernel@vger.kernel.org; Justin He
> ; Greg Kurz
>
> -Original Message-
> From: Greg Kurz
> Sent: Monday, September 14, 2020 4:36 PM
> To: Jianyong Wu
> Cc: eri...@gmail.com; lu...@ionkov.net; asmad...@codewreck.org; v9fs-
> develo...@lists.sourceforge.net; Justin He ; linux-
> ker...@vger.kernel.org;
Hi Dominique,
> -Original Message-
> From: Dominique Martinet
> Sent: Monday, September 14, 2020 4:32 PM
> To: Jianyong Wu
> Cc: eri...@gmail.com; lu...@ionkov.net; v9fs-
> develo...@lists.sourceforge.net; linux-kernel@vger.kernel.org; Justin He
> ; Greg Kurz
>
Hi Dominique,
> -Original Message-
> From: Dominique Martinet
> Sent: Monday, September 14, 2020 2:32 PM
> To: Jianyong Wu
> Cc: lu...@ionkov.net; Justin He ; eri...@gmail.com;
> linux-kernel@vger.kernel.org; v9fs-develo...@lists.sourceforge.net; Greg
> Kurz
Hi Dominique,
> -Original Message-
> From: Dominique Martinet
> Sent: Monday, September 14, 2020 1:56 PM
> To: Jianyong Wu
> Cc: eri...@gmail.com; lu...@ionkov.net; v9fs-
> develo...@lists.sourceforge.net; linux-kernel@vger.kernel.org; Justin He
> ; Greg Kurz
>
race issue test from the old test case:
for file in {01..50}; do touch f.${file}; done
seq 1 1000 | xargs -n 1 -P 50 -I{} cat f.* > /dev/null
open-unlink-f*syscall test:
I have tested for f*syscall include: ftruncate fstat fchown fchmod faccessat.
Signed-off-by: Jianyong Wu
---
fs/9p
mission denied)
ftruncate(4, 0) = 0
Change-Id: Icb657359493fc9c06956881551e83c7e1af4f024
Signed-off-by: Greg Kurz
Signed-off-by: Jianyong Wu
---
fs/9p/fid.c | 9 +
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/fs/9p/fid.c b/fs/9p/fid.c
index d11dd430590d..0
ergen
(changed v9fs_fid_find_global to v9fs_fid_find_inode in comment)
Signed-off-by: Greg Kurz
Signed-off-by: Jianyong Wu
Change-Id: Ifd5c8cdca8b40216e3e7d021eb6d0afd750096e7
---
fs/9p/fid.c | 30 ++
fs/9p/vfs_inode.c | 4
net/9p/client.c | 5 -
3
Signed-off-by: Greg Kurz
Signed-off-by: Jianyong Wu
---
fs/9p/fid.c | 32 +++-
fs/9p/fid.h | 1 +
fs/9p/vfs_dir.c | 3 +++
fs/9p/vfs_file.c| 1 +
fs/9p/vfs_inode.c | 6 +-
fs/9p/vfs_inode_dotl.c | 1 +
include/net
n Hensbergen (1):
fs/9p: fix create-unlink-getattr idiom
Greg Kurz (1):
fs/9p: search open fids first
Jianyong Wu (2):
fs/9p: track open fids
9p: fix race issue in fid contention.
fs/9p/fid.c | 72 +++--
fs/9p/fid.h | 25 ++
> -Original Message-
> From: Marc Zyngier
> Sent: Monday, September 7, 2020 5:47 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;
> richardco
> -Original Message-
> From: Marc Zyngier
> Sent: Monday, September 7, 2020 4:55 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;
> richardco
Hi Marc,
> -Original Message-
> From: Marc Zyngier
> Sent: Saturday, September 5, 2020 7:33 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.
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 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 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.
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
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
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
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
-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
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
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
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
> -Original Message-
> From: Will Deacon
> Sent: Monday, July 27, 2020 7:38 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 Will,
> -Original Message-
> From: Jianyong Wu
> Sent: Friday, June 19, 2020 9:01 PM
> To: net...@vger.kernel.org; yangbo...@nxp.com; john.stu...@linaro.org;
> t...@linutronix.de; pbonz...@redhat.com; sean.j.christopher...@intel.com;
> m...@kernel.org; richardcoch.
> -Original Message-
> From: Dominique Martinet
> Sent: Monday, July 20, 2020 10:54 PM
> To: Jianyong Wu
> Cc: eri...@gmail.com; h...@lst.de; dhowe...@redhat.com;
> lu...@ionkov.net; v9fs-develo...@lists.sourceforge.net; linux-
> ker...@vger.kernel.org; Kaly Xi
> -Original Message-
> From: Al Viro On Behalf Of Al Viro
> Sent: Monday, July 20, 2020 9:52 AM
> To: Jianyong Wu
> Cc: eri...@gmail.com; h...@lst.de; dhowe...@redhat.com;
> lu...@ionkov.net; asmad...@codewreck.org; v9fs-
> develo...@lists.sourceforge.net; linux-k
: Jianyong Wu
---
fs/stat.c| 1 +
include/linux/stat.h | 6 ++
2 files changed, 7 insertions(+)
diff --git a/fs/stat.c b/fs/stat.c
index 44f8ad346db4..0dee5487f6d6 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -147,6 +147,7 @@ int vfs_statx_fd(unsigned int fd, struct kstat *stat
wn.
so we should pass the file info down in 9p guest in getattr op.
it need add a new file member in "struct kstat" as "struct istat" does.
Jianyong Wu (2):
vfs: pass file down when getattr to avoid losing info.
9p: retrieve fid from file if it exists when getattr.
fs/9p/vfs
fid should be retrieved from file when it is not NULL in getattr.
it denotes that getattr is called by fdstat from userspace when
file is exist, which means we should get info from file context
not dentry to avoid the failure when the dentry has gone.
Signed-off-by: Jianyong Wu
---
fs/9p
> -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
> ;
("tmp", O_RDWR);
ftruncate(fd, 10);
The file context related with the fd will be lost as fid is always
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/
("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/
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
Hi Dominique,
> -Original Message-
> From: Dominique Martinet
> Sent: Wednesday, July 1, 2020 6:59 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
=open("tmp", O_RDWR);
ftruncate(fd, 10);
The file context related with fd will be lost as fid is always
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/
These codes have been commented out since 2007 and lay in kernel
since then. So, it's better to remove them.
Signed-off-by: Jianyong Wu
---
fs/9p/vfs_inode.c | 53 ---
1 file changed, 53 deletions(-)
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_in
Hi Dominique,
> -Original Message-
> From: Dominique Martinet
> Sent: Sunday, June 28, 2020 1:52 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
Hi Dominique,
> -Original Message-
> From: Dominique Martinet
> Sent: Sunday, June 28, 2020 2:28 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
These code has been commented out since 2007 and lied in kernel
since then. it's time to remove thest no used code.
Signed-off-by: Jianyong Wu
---
fs/9p/vfs_inode.c | 53 ---
1 file changed, 53 deletions(-)
diff --git a/fs/9p/vfs_inode.c b/
ample:
fd=open("tmp", O_RDWR);
ftruncate(fd, 10);
the file context related with fd info will lost as fid will always be
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: Jia
in the current implementation in setattr in 9p, fid will always be retrieved
from dentry, which may be against the original intension of user and lead to
bug.
also, remove no used code in 9p.
Signed-off-by: Jianyong Wu
Jianyong Wu (2):
9p: retrive fid from file when file instance exist.
9p
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.
Hi Steven,
> -Original Message-
> From: Steven Price
> Sent: Friday, June 19, 2020 6:45 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 Christoph,
> -Original Message-
> From: Christoph Hellwig
> Sent: Friday, June 19, 2020 9:57 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;
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
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
-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
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
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
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
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
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