Hi,
Cheers for these discussion. :)
I am on vacation, and will come back at 2.18.
Thanks,
Keqian
On 21-02-07 18:40:36, Keqian Zhu wrote:
> Hi Yi,
>
> On 2021/2/7 17:56, Yi Sun wrote:
> > Hi,
> >
> > On 21-01-28 23:17:41, Keqian Zhu wrote:
> >
> > [...]
> >
> >> +static void
Hi Alex,
On 2020/12/15 8:04, Alex Williamson wrote:
> On Thu, 10 Dec 2020 15:34:22 +0800
> Keqian Zhu wrote:
>
>> When we pin or detach a group which is not dirty tracking capable,
>> we will try to promote pinned_scope of vfio_iommu.
>>
>> If we succeed to do so, vfio only report pinned_scope
On 2020/12/11 3:16, Alex Williamson wrote:
> On Thu, 10 Dec 2020 15:34:19 +0800
> Keqian Zhu wrote:
>
>> Currently we do not clear added dirty bit of bitmap when unwind
>> pin, so if pin failed at halfway, we set unnecessary dirty bit
>> in bitmap. Clearing added dirty bit when unwind pin,
Hi Marc,
On 2020/12/3 22:58, Marc Zyngier wrote:
> On 2020-08-18 04:28, Keqian Zhu wrote:
>> In commit 0ea415390cd3 ("clocksource/arm_arch_timer: Use
>> arch_timer_read_counter
>> to access stable counters"), we separate stable and normal count reader to
>> omit
>> unnecessary overhead on
Hi Marc,
On 2020/12/3 22:57, Marc Zyngier wrote:
> On 2020-08-18 04:28, Keqian Zhu wrote:
>> ARM virtual counter supports event stream, it can only trigger an event
>> when the trigger bit (the value of CNTKCTL_EL1.EVNTI) of CNTVCT_EL0 changes,
>> so the actual period of event stream is
On 2020/12/3 23:04, Marc Zyngier wrote:
> On 2020-08-17 12:07, Keqian Zhu wrote:
>> Rename PV_FEATURES to PV_TIME_FEATURES.
>>
>> Signed-off-by: Keqian Zhu
>> Reviewed-by: Andrew Jones
>> Reviewed-by: Steven Price
>> ---
>> Documentation/virt/kvm/arm/pvtime.rst | 6 +++---
>> 1 file
Hi Marc,
Found that this bugfix series is not applied for now.
Does it need some modification? Wish you can pick it up :-)
Thanks,
Keqian
On 2020/8/18 11:28, Keqian Zhu wrote:
> change log:
>
> v2:
> - Do not revert commit 0ea415390cd3, fix it instead.
> - Correct the tags of second patch.
>
Hi Marc,
Found that this series is not applied for now.
Does it need some modification? Wish you can pick it up :-)
Thanks,
Keqian
On 2020/8/17 19:07, Keqian Zhu wrote:
> During picking up pvtime LPT support for arm64, I do some trivial fixes for
> pvtime ST.
>
> change log:
>
> v2:
> - Add
Hi Marc and Steven,
On 2020/9/2 18:09, Steven Price wrote:
> Hi Marc,
>
> Sorry for the slow response, I've been on holiday.
>
> On 22/08/2020 11:31, Marc Zyngier wrote:
>> Hi Steven,
>>
>> On Wed, 19 Aug 2020 09:54:40 +0100,
>> Steven Price wrote:
>>>
>>> On 18/08/2020 15:41, Marc Zyngier
On 2020/8/19 16:54, Steven Price wrote:
> On 18/08/2020 15:41, Marc Zyngier wrote:
>> On 2020-08-17 09:41, Keqian Zhu wrote:
>>> Hi all,
>>>
>>> This patch series picks up the LPT pvtime feature originally developed
>>> by Steven Price: https://patchwork.kernel.org/cover/10726499/
>>>
>>>
Hi Marc,
On 2020/8/17 20:56, Marc Zyngier wrote:
> On 2020-08-17 13:24, Keqian Zhu wrote:
>> ARM virtual counter supports event stream, it can only trigger an event
>> when the trigger bit (the value of CNTKCTL_EL1.EVNTI) of CNTVCT_EL0 changes,
>> so the actual period of event stream is
Hi Marc,
On 2020/8/17 20:52, Marc Zyngier wrote:
> On 2020-08-17 13:24, Keqian Zhu wrote:
>> In commit 0ea415390cd3 (clocksource/arm_arch_timer: Use
>> arch_timer_read_counter
>> to access stable counters), we separate stable and normal count reader.
>> Actually
>> the stable reader can
Hi Steven,
On 2020/8/17 17:49, Steven Price wrote:
> On 17/08/2020 09:43, zhukeqian wrote:
>> Hi Marc,
>>
[...]
>>>
>>> It is pretty unfortunate that PV time has turned into such a train wreck,
>>> but that's what we have now, and it has to stay
Hi Andrew,
On 2020/8/17 16:47, Andrew Jones wrote:
> On Mon, Aug 17, 2020 at 11:37:27AM +0800, Keqian Zhu wrote:
>> Rename PV_FEATURES tp PV_TIME_FEATURES
>>
>> Signed-off-by: Keqian Zhu
>> ---
>> Documentation/virt/kvm/arm/pvtime.rst | 6 +++---
>> 1 file changed, 3 insertions(+), 3
Hi Marc,
On 2020/8/17 15:39, Marc Zyngier wrote:
> On 2020-08-17 04:37, Keqian Zhu wrote:
>> ARM64 PV-time ST is configured by userspace through vCPU attribute,
>> and KVM_DEV_TYPE_ARM_PV_TIME is unused.
>>
>> Signed-off-by: Keqian Zhu
>> ---
>> include/uapi/linux/kvm.h | 2 --
>>
Hi Steven,
On 2020/7/27 18:48, Steven Price wrote:
> On 21/07/2020 04:26, zhukeqian wrote:
>> Hi Steven,
>
> Hi Keqian,
>
>> On 2019/8/2 22:50, Steven Price wrote:
>>> This series add support for paravirtualized time for arm64 guests and
>>> KVM
Hi Marc,
On 2020/7/28 18:16, Marc Zyngier wrote:
> On 2020-07-17 10:21, Keqian Zhu wrote:
>> ARM virtual counter supports event stream. It can only trigger an event
>> when the trigger bit of CNTVCT_EL0 changes from 0 to 1 (or from 1 to 0),
>> so the actual period of event stream is 2 ^
Hi Marc,
On 2020/7/28 15:52, Marc Zyngier wrote:
> On 2020-07-28 03:11, zhukeqian wrote:
>> Hi Marc,
>
> [...]
>
>>> But you are still reading the leaf entries of the PTs, hence defeating
>>> any sort of prefetch that the CPU could do for you. And my claim is
Friendly ping.
Is this an effective bugfix?
On 2020/7/17 17:21, Keqian Zhu wrote:
> ARM virtual counter supports event stream. It can only trigger an event
> when the trigger bit of CNTVCT_EL0 changes from 0 to 1 (or from 1 to 0),
> so the actual period of event stream is 2 ^ (cntkctl_evnti + 1).
Hi Marc,
On 2020/7/13 22:53, Marc Zyngier wrote:
> Hi Keqian,
>
> On Mon, 13 Jul 2020 03:47:25 +0100,
> zhukeqian wrote:
>>
>> Hi Marc,
>>
>> Sorry for the delay reply.
>>
>> On 2020/7/6 15:54, Marc Zyngier wrote:
>>> Hi Keqian,
>
Hi Steven,
On 2019/8/2 22:50, Steven Price wrote:
> This series add support for paravirtualized time for arm64 guests and
> KVM hosts following the specification in Arm's document DEN 0057A:
>
> https://developer.arm.com/docs/den0057/a
>
> It implements support for stolen time, allowing the
On 2020/7/14 20:23, Marc Zyngier wrote:
> On 2020-07-14 13:15, zhukeqian wrote:
>> Hi Marc,
>>
>> On 2020/7/14 19:34, Marc Zyngier wrote:
>>> Hi Keqian,
>>>
>>> On 2020-07-14 03:20, zhukeqian wrote:
>>>> Hi all,
>>>>
>
Hi Marc,
On 2020/7/14 19:34, Marc Zyngier wrote:
> Hi Keqian,
>
> On 2020-07-14 03:20, zhukeqian wrote:
>> Hi all,
>>
>> We are studying Enhanced Counter Virtualization (introduced by ARMv8.6
>> extension), and here is a question
>> raised by Biaoxi
Hi all,
We are studying Enhanced Counter Virtualization (introduced by ARMv8.6
extension), and here is a question
raised by Biaoxiang Ye :
Described in the ARMv8.6 Extension Specification:
Note: the scaling factor CNTSCALE is designed as a 2.62 bit fixed point number,
so permitting a scaling
Hi Marc,
Sorry for the delay reply.
On 2020/7/6 15:54, Marc Zyngier wrote:
> Hi Keqian,
>
> On 2020-07-06 02:28, zhukeqian wrote:
>> Hi Catalin and Marc,
>>
>> On 2020/7/2 21:55, Keqian Zhu wrote:
>>> This patch series add support for dirty log based on HW D
Hi Catalin and Marc,
On 2020/7/2 21:55, Keqian Zhu wrote:
> This patch series add support for dirty log based on HW DBM.
>
> It works well under some migration test cases, including VM with 4K
> pages or 2M THP. I checked the SHA256 hash digest of all memory and
> they keep same for source VM
Hi,
On 2020/7/2 21:55, Keqian Zhu wrote:
> For that using arm64 DBM to log dirty pages has the side effect
> of long time dirty log sync, we should give userspace opportunity
> to enable or disable this feature, to realize some policy.
>
> This feature is disabled by default.
>
> Signed-off-by:
Hi Steven,
On 2020/7/1 19:28, Steven Price wrote:
> Hi,
>
> On 16/06/2020 10:35, Keqian Zhu wrote:
>> kvm_set_pte is called to replace a target PTE with a desired one.
>> We always do this without changing the desired one, but if dirty
>> status set by hardware is coverred, let caller know it.
Hi,
On 2020/6/16 17:35, Keqian Zhu wrote:
> This patch series add support for stage2 hardware DBM, and it is only
> used for dirty log for now.
>
> It works well under some migration test cases, including VM with 4K
> pages or 2M THP. I checked the SHA256 hash digest of all memory and
> they
Hi Marc,
On 2020/5/31 0:31, Marc Zyngier wrote:
> Hi Alex,
>
> On 2020-05-30 11:46, Alexandru Elisei wrote:
>> Hi,
>
> [...]
>
diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c
index 48d0ec44ad77..e6378162cdef 100644
--- a/virt/kvm/arm/arm.c
+++ b/virt/kvm/arm/arm.c
Hi Catalin,
On 2020/5/26 19:49, Catalin Marinas wrote:
> On Mon, May 25, 2020 at 07:24:01PM +0800, Keqian Zhu wrote:
>> diff --git a/arch/arm64/include/asm/pgtable-prot.h
>> b/arch/arm64/include/asm/pgtable-prot.h
>> index 1305e28225fc..f9910ba2afd8 100644
>> ---
Hi Marc,
On 2020/5/25 23:44, Marc Zyngier wrote:
> On 2020-05-25 12:23, Keqian Zhu wrote:
>> This patch series add support for stage2 hardware DBM, and it is only
>> used for dirty log for now.
>>
>> It works well under some migration test cases, including VM with 4K
>> pages or 2M THP. I checked
Hi Catalin,
On 2020/5/15 0:14, Catalin Marinas wrote:
> Hi Keqian,
>
> On Thu, May 14, 2020 at 05:16:52PM +0800, zhukeqian wrote:
>> I have some questions after deep reading your patch
>> https://patchwork.kernel.org/patch/8824261/ which enables hardware updates
>> of
Hi Catalin,
I have some questions after deep reading your patch
https://patchwork.kernel.org/patch/8824261/ which enables hardware updates
of the Access Flag for Stage 2 page tables.
I notice that at the bottom of commit message, you said the following words:
"After some digging through the KVM
Hi Marc,
On 2020/4/16 23:08, Marc Zyngier wrote:
> On Mon, 13 Apr 2020 20:20:23 +0800
> Keqian Zhu wrote:
>
>> There is already support of enabling dirty log graually in small chunks
>
> gradually
>
>> for x86 in commit 3c9bd4006bfc ("KVM: x86: enable dirty log gradually in
>> small chunks").
Hi Paolo,
On 2020/4/16 23:55, Paolo Bonzini wrote:
> On 16/04/20 17:09, Marc Zyngier wrote:
>> On Wed, 15 Apr 2020 18:13:56 +0200
>> Paolo Bonzini wrote:
>>
>>> On 13/04/20 14:20, Keqian Zhu wrote:
There is already support of enabling dirty log graually in small chunks
for x86 in
Hi Marc,
In RFC patch, I still write protect huge pages when DIRTY_LOG_INITIALLY_ALL_SET
is enabled by userspace. I find that both huge pages and normal pages can be
write protected during log clear. So this formal patch is pretty simple now.
Thanks,
Keqian
On 2020/4/13 20:20, Keqian Zhu wrote:
Hi Jay,
On 2020/3/11 15:34, Zhoujian (jay) wrote:
>
>
>> -Original Message-----
>> From: zhukeqian
>> Sent: Wednesday, March 11, 2020 3:20 PM
>> To: Marc Zyngier
>> Cc: kvmarm@lists.cs.columbia.edu; k...@vger.kernel.org;
>> linux-ker...@vger.kernel
Hi Marc,
On 2020/3/10 21:16, Marc Zyngier wrote:
> On 2020-03-10 08:26, zhukeqian wrote:
>> Hi Marc,
>>
>> On 2020/3/9 19:45, Marc Zyngier wrote:
>>> Kegian,
>
> [...]
>
>>> Is there a userspace counterpart to it?
>>>
>> As this KVM
Hi Marc,
On 2020/3/9 19:45, Marc Zyngier wrote:
> Kegian,
>
> In the future, please Cc me on your KVM/arm64 patches, as well as
> all the reviewers mentioned in the MAINTAINERS file.
>
> On 2020-03-09 08:57, Keqian Zhu wrote:
>> There is already support of enabling dirty log graually
>
>
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