have a suitable system to test it.
Reviewed-by: Steven Price
---
v2:
- Add a guard for NULL ops->pte_entry
- Take mm->page_table_lock when walking hugepage table, as suggested by
follow_huge_pd()
---
mm/pagewalk.c | 58 ++-
1 file chang
On 19/04/2021 14:14, Christophe Leroy wrote:
Le 16/04/2021 à 12:51, Steven Price a écrit :
On 16/04/2021 11:38, Christophe Leroy wrote:
Le 16/04/2021 à 11:28, Steven Price a écrit :
On 15/04/2021 18:18, Christophe Leroy wrote:
To be honest I don't fully understand why powerpc requires
On 16/04/2021 16:15, Christophe Leroy wrote:
Le 16/04/2021 à 17:04, Christophe Leroy a écrit :
Le 16/04/2021 à 16:40, Christophe Leroy a écrit :
Le 16/04/2021 à 15:00, Steven Price a écrit :
On 16/04/2021 12:08, Christophe Leroy wrote:
Le 16/04/2021 à 12:51, Steven Price a écrit
mapping
in userspace. The above capability gates access to the ioctl.
Signed-off-by: Steven Price
---
Documentation/virt/kvm/api.rst | 53 ++
1 file changed, 53 insertions(+)
diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
index
to easily read/write the
tags from guest memory, allowing the VMM's mapping to be non-PROT_MTE
while the VMM can still read/write the tags for the purpose of
migration.
Signed-off-by: Steven Price
---
arch/arm64/include/uapi/asm/kvm.h | 14 +++
arch/arm64/kvm/arm.c | 69
It's now safe for the VMM to enable MTE in a guest, so expose the
capability to user space.
Signed-off-by: Steven Price
---
arch/arm64/kvm/arm.c | 9 +
arch/arm64/kvm/sys_regs.c | 3 +++
2 files changed, 12 insertions(+)
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
Define the new system registers that MTE introduces and context switch
them. The MTE feature is still hidden from the ID register as it isn't
supported in a VM yet.
Signed-off-by: Steven Price
---
arch/arm64/include/asm/kvm_host.h | 6 ++
arch/arm64/include/asm/kvm_mte.h
are correctly saved/restored across swap.
Actually exposing the new capability to user space happens in a later
patch.
Signed-off-by: Steven Price
---
arch/arm64/include/asm/kvm_emulate.h | 3 +++
arch/arm64/include/asm/kvm_host.h| 3 +++
arch/arm64/kvm/hyp/exception.c | 3 ++-
arch/arm64/kvm
out.
Signed-off-by: Steven Price
---
arch/arm64/include/asm/pgtable.h | 2 +-
arch/arm64/kernel/mte.c | 16
2 files changed, 13 insertions(+), 5 deletions(-)
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index e17b96d0e4b5
rice%40arm.com
Steven Price (6):
arm64: mte: Sync tags for pages where PTE is untagged
arm64: kvm: Introduce MTE VM feature
arm64: kvm: Save/restore MTE registers
arm64: kvm: Expose KVM_ARM_CAP_MTE
KVM: arm64: ioctl to fetch/store tags in a guest
KVM: arm64: Document MTE capability and i
On 16/04/2021 12:08, Christophe Leroy wrote:
Le 16/04/2021 à 12:51, Steven Price a écrit :
On 16/04/2021 11:38, Christophe Leroy wrote:
Le 16/04/2021 à 11:28, Steven Price a écrit :
On 15/04/2021 18:18, Christophe Leroy wrote:
In order to support large pages on powerpc, notepage()
needs
On 16/04/2021 11:38, Christophe Leroy wrote:
Le 16/04/2021 à 11:28, Steven Price a écrit :
On 15/04/2021 18:18, Christophe Leroy wrote:
In order to support large pages on powerpc, notepage()
needs to know the page size of the page.
Add a page_size argument to notepage().
Signed-off
On 15/04/2021 18:18, Christophe Leroy wrote:
In order to support large pages on powerpc, notepage()
needs to know the page size of the page.
Add a page_size argument to notepage().
Signed-off-by: Christophe Leroy
---
arch/arm64/mm/ptdump.c | 2 +-
arch/riscv/mm/ptdump.c |
/x86 implementations (where this
happens to be safe).
Fixes: 30d621f6723b ("mm: add generic ptdump")
Cc: Steven Price
Signed-off-by: Christophe Leroy
Reviewed-by: Steven Price
Thanks,
Steve
---
mm/ptdump.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/m
On 07/04/2021 16:14, Catalin Marinas wrote:
On Wed, Apr 07, 2021 at 11:20:18AM +0100, Steven Price wrote:
On 31/03/2021 19:43, Catalin Marinas wrote:
When a slot is added by the VMM, if it asked for MTE in guest (I guess
that's an opt-in by the VMM, haven't checked the other patches), can we
On 30/03/2021 04:20, Jisheng Zhang wrote:
Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.
Signed-off-by: Jisheng Zhang
Reviewed-by: Steven Price
---
arch/arm/mm/ptdump_debugfs.c | 13 +
1 file changed, 1 insertion(+), 12 deletions(-)
diff --git a/arch/arm/mm
On 30/03/2021 04:19, Jisheng Zhang wrote:
They are not needed after booting, so mark them as __init to move them
to the .init section.
Signed-off-by: Jisheng Zhang
Reviewed-by: Steven Price
---
arch/arm/mm/dump.c | 4 ++--
arch/arm/mm/ptdump_debugfs.c | 2 +-
2 files changed
On 30/03/2021 06:54, Jisheng Zhang wrote:
They are not needed after booting, so mark them as __init to move them
to the .init section.
Signed-off-by: Jisheng Zhang
Reviewed-by: Steven Price
---
Since v1:
- add __init section mark to __vdso_init() and __aarch32_alloc_vdso_pages()
arch
On 31/03/2021 19:43, Catalin Marinas wrote:
On Wed, Mar 31, 2021 at 11:41:20AM +0100, Steven Price wrote:
On 31/03/2021 10:32, David Hildenbrand wrote:
On 31.03.21 11:21, Catalin Marinas wrote:
On Wed, Mar 31, 2021 at 09:34:44AM +0200, David Hildenbrand wrote:
On 30.03.21 12:30, Catalin
On 31/03/2021 10:32, David Hildenbrand wrote:
On 31.03.21 11:21, Catalin Marinas wrote:
On Wed, Mar 31, 2021 at 09:34:44AM +0200, David Hildenbrand wrote:
On 30.03.21 12:30, Catalin Marinas wrote:
On Mon, Mar 29, 2021 at 05:06:51PM +0100, Steven Price wrote:
On 28/03/2021 13:21, Catalin
On 30/03/2021 11:13, Catalin Marinas wrote:
On Mon, Mar 29, 2021 at 04:55:29PM +0100, Steven Price wrote:
On 26/03/2021 18:56, Catalin Marinas wrote:
On Fri, Mar 12, 2021 at 03:18:57PM +, Steven Price wrote:
A KVM guest could store tags in a page even if the VMM hasn't mapped
the page
On 28/03/2021 13:21, Catalin Marinas wrote:
On Sat, Mar 27, 2021 at 03:23:24PM +, Catalin Marinas wrote:
On Fri, Mar 12, 2021 at 03:18:58PM +, Steven Price wrote:
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index 77cb2d28f2a4..b31b7a821f90 100644
--- a/arch/arm64/kvm/mmu.c
On 26/03/2021 18:56, Catalin Marinas wrote:
Hi Steven,
On Fri, Mar 12, 2021 at 03:18:57PM +, Steven Price wrote:
A KVM guest could store tags in a page even if the VMM hasn't mapped
the page with PROT_MTE. So when restoring pages from swap we will
need to check to see if there are any
mapping
in userspace. The above capability gates access to the ioctl.
Signed-off-by: Steven Price
---
Documentation/virt/kvm/api.rst | 53 ++
1 file changed, 53 insertions(+)
diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
index
to easily read/write the
tags from guest memory, allowing the VMM's mapping to be non-PROT_MTE
while the VMM can still read/write the tags for the purpose of
migration.
Signed-off-by: Steven Price
---
arch/arm64/include/uapi/asm/kvm.h | 14 +++
arch/arm64/kvm/arm.c | 69
Define the new system registers that MTE introduces and context switch
them. The MTE feature is still hidden from the ID register as it isn't
supported in a VM yet.
Signed-off-by: Steven Price
---
arch/arm64/include/asm/kvm_host.h | 6 ++
arch/arm64/include/asm/kvm_mte.h
It's now safe for the VMM to enable MTE in a guest, so expose the
capability to user space.
Signed-off-by: Steven Price
---
arch/arm64/kvm/arm.c | 9 +
arch/arm64/kvm/sys_regs.c | 3 +++
2 files changed, 12 insertions(+)
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
).
* Correctly hold slots_lock during the ioctl (rather than
embarrassingly not do any locking as before...).
* Add the structure definition to the documentation and some
improvements suggested by Peter.
[1] https://lore.kernel.org/r/20210301142315.30920-1-steven.price%40arm.com
Steven Price (6
out.
Signed-off-by: Steven Price
---
arch/arm64/include/asm/pgtable.h | 2 +-
arch/arm64/kernel/mte.c | 16
2 files changed, 13 insertions(+), 5 deletions(-)
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index e17b96d0e4b5
are correctly saved/restored across swap.
Actually exposing the new capability to user space happens in a later
patch.
Signed-off-by: Steven Price
---
arch/arm64/include/asm/kvm_emulate.h | 3 +++
arch/arm64/include/asm/kvm_host.h| 3 +++
arch/arm64/kvm/hyp/exception.c | 3 ++-
arch/arm64/kvm
On 09/03/2021 11:01, Peter Maydell wrote:
On Mon, 1 Mar 2021 at 14:23, Steven Price wrote:
A new capability (KVM_CAP_ARM_MTE) identifies that the kernel supports
granting a guest access to the tags, and provides a mechanism for the
VMM to enable it.
A new ioctl (KVM_ARM_MTE_COPY_TAGS
On 09/03/2021 17:57, Marc Zyngier wrote:
On Mon, 01 Mar 2021 14:23:14 +,
Steven Price wrote:
The VMM may not wish to have it's own mapping of guest memory mapped
with PROT_MTE because this causes problems if the VMM has tag checking
enabled (the guest controls the tags in physical RAM
On 09/03/2021 17:27, Marc Zyngier wrote:
On Mon, 01 Mar 2021 14:23:12 +,
Steven Price wrote:
Define the new system registers that MTE introduces and context switch
them. The MTE feature is still hidden from the ID register as it isn't
supported in a VM yet.
Signed-off-by: Steven Price
On 09/03/2021 17:06, Marc Zyngier wrote:
On Mon, 01 Mar 2021 14:23:11 +,
Steven Price wrote:
Add a new VM feature 'KVM_ARM_CAP_MTE' which enables memory tagging
for a VM. This will expose the feature to the guest and automatically
tag memory pages touched by the VM as PG_mte_tagged
Reviewed-by: Steven Price
---
drivers/gpu/drm/panfrost/panfrost_devfreq.c | 14 +-
drivers/gpu/drm/panfrost/panfrost_devfreq.h | 3 ---
2 files changed, 1 insertion(+), 16 deletions(-)
diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
b/drivers/gpu/drm/panfrost
them harder). With that fixed:
Reviewed-by: Steven Price
+ devfreq->cdev = NULL;
+ }
+ }
+
return devfreq;
err_init:
@@ -960,6 +971,8 @@ int devfreq_remove_device(struct devfreq *devfreq)
if (!devfreq)
return -EINVAL;
On 04/03/2021 12:50, Daniel Lezcano wrote:
Currently the default behavior is to manually having the devfreq
backend to register themselves as a devfreq cooling device.
There are no so many and actually it makes more sense to register the
devfreq device when adding it.
Consequently, every
mapping
in userspace. The above capability gates access to the ioctl.
Signed-off-by: Steven Price
---
Documentation/virt/kvm/api.rst | 37 ++
1 file changed, 37 insertions(+)
diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
index
to easily read/write the
tags from guest memory, allowing the VMM's mapping to be non-PROT_MTE
while the VMM can still read/write the tags for the purpose of
migration.
Signed-off-by: Steven Price
---
arch/arm64/include/uapi/asm/kvm.h | 13 +++
arch/arm64/kvm/arm.c | 57
Define the new system registers that MTE introduces and context switch
them. The MTE feature is still hidden from the ID register as it isn't
supported in a VM yet.
Signed-off-by: Steven Price
---
arch/arm64/include/asm/kvm_host.h | 6 ++
arch/arm64/include/asm/kvm_mte.h
documentation patch
[1] https://lore.kernel.org/r/20210205135803.48321-1-steven.pr...@arm.com/
Steven Price (6):
arm64: mte: Sync tags for pages where PTE is untagged
arm64: kvm: Introduce MTE VM feature
arm64: kvm: Save/restore MTE registers
arm64: kvm: Expose KVM_ARM_CAP_MTE
KVM: arm64: ioctl
It's now safe for the VMM to enable MTE in a guest, so expose the
capability to user space.
Signed-off-by: Steven Price
---
arch/arm64/kvm/arm.c | 9 +
arch/arm64/kvm/sys_regs.c | 3 +++
2 files changed, 12 insertions(+)
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
are correctly saved/restored across swap.
Actually exposing the new capability to user space happens in a later
patch.
Signed-off-by: Steven Price
---
arch/arm64/include/asm/kvm_emulate.h | 3 +++
arch/arm64/include/asm/kvm_host.h| 3 +++
arch/arm64/kvm/hyp/exception.c | 3 ++-
arch/arm64/kvm
out.
Signed-off-by: Steven Price
---
arch/arm64/include/asm/pgtable.h | 2 +-
arch/arm64/kernel/mte.c | 16
2 files changed, 13 insertions(+), 5 deletions(-)
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index e17b96d0e4b5
On 11/02/2021 20:21, sonicadvan...@gmail.com wrote:
From: Ryan Houdek
Sorry about the noise. I obviously don't work in this ecosystem.
Didn't get any comments previously so I'm resending
We're just coming up to a merge window, so I expect people are fairly
busy at the moment. Also from a
ink: https://lore.kernel.org/r/20201209060932.212364-2-jianyong...@arm.com
Looks good to me, FWIW:
Reviewed-by: Steven Price
---
arch/arm/include/asm/hypervisor.h | 3 ++
arch/arm64/include/asm/hypervisor.h | 3 ++
drivers/firmware/psci/psci.c| 2 ++
drivers/firmware/smccc/Makefil
On 08/02/2021 17:31, Peter Maydell wrote:
On Fri, 5 Feb 2021 at 13:58, Steven Price wrote:
The VMM may not wish to have it's own mapping of guest memory mapped
with PROT_MTE because this causes problems if the VMM has tag checking
enabled (the guest controls the tags in physical RAM and it's
to easily read/write the
tags from guest memory, allowing the VMM's mapping to be non-PROT_MTE
while the VMM can still read/write the tags for the purpose of
migration.
Signed-off-by: Steven Price
---
arch/arm64/include/uapi/asm/kvm.h | 13 +++
arch/arm64/kvm/arm.c | 57
Define the new system registers that MTE introduces and context switch
them. The MTE feature is still hidden from the ID register as it isn't
supported in a VM yet.
Signed-off-by: Steven Price
---
arch/arm64/include/asm/kvm_host.h | 6 ++
arch/arm64/include/asm/kvm_mte.h
are correctly saved/restored across swap.
Actually exposing the new capability to user space happens in a later
patch.
Signed-off-by: Steven Price
---
arch/arm64/include/asm/kvm_emulate.h | 3 +++
arch/arm64/include/asm/kvm_host.h| 3 +++
arch/arm64/kvm/hyp/exception.c | 3 ++-
arch/arm64/kvm
It's now safe for the VMM to enable MTE in a guest, so expose the
capability to user space.
Signed-off-by: Steven Price
---
arch/arm64/kvm/arm.c | 9 +
arch/arm64/kvm/sys_regs.c | 3 +++
2 files changed, 12 insertions(+)
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
://lore.kernel.org/r/20210115152811.8398-1-steven.price%40arm.com
Steven Price (5):
arm64: mte: Sync tags for pages where PTE is untagged
arm64: kvm: Introduce MTE VM feature
arm64: kvm: Save/restore MTE registers
arm64: kvm: Expose KVM_ARM_CAP_MTE
KVM: arm64: ioctl to fetch/store tags
out.
Signed-off-by: Steven Price
---
arch/arm64/include/asm/pgtable.h | 2 +-
arch/arm64/kernel/mte.c | 16
2 files changed, 13 insertions(+), 5 deletions(-)
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 501562793ce2
On 02/02/2021 14:11, Marc Zyngier wrote:
From: Will Deacon
Although the SMCCC specification provides some limited functionality for
describing the presence of hypervisor and firmware services, this is
generally applicable only to functions designated as "Arm Architecture
Service Functions" and
On 02/02/2021 17:12, Marc Zyngier wrote:
On 2021-01-15 15:28, Steven Price wrote:
Add a new VM feature 'KVM_ARM_CAP_MTE' which enables memory tagging
for a VM. This exposes the feature to the guest and automatically tags
memory pages touched by the VM as PG_mte_tagged (and clears the tags
On 02/02/2021 15:36, Marc Zyngier wrote:
On 2021-01-15 15:28, Steven Price wrote:
Define the new system registers that MTE introduces and context switch
them. The MTE feature is still hidden from the ID register as it isn't
supported in a VM yet.
Signed-off-by: Steven Price
---
arch/arm64
On 22/01/2021 10:00, Lukasz Luba wrote:
On 1/22/21 8:21 AM, Steven Price wrote:
On 21/01/2021 17:04, Lukasz Luba wrote:
The simple_ondemand devfreq governor uses two thresholds to decide about
the frequency change: upthreshold, downdifferential. These two tunable
change the behavior
On 22/01/2021 10:11, Lukasz Luba wrote:
On 1/21/21 5:15 PM, Daniel Lezcano wrote:
On 21/01/2021 18:04, Lukasz Luba wrote:
The simple_ondemand devfreq governor uses two thresholds to decide about
the frequency change: upthreshold, downdifferential. These two tunable
change the behavior of the
% threshold more easily (AFAICT kbase
uses the default 90/5 thresholds), but this seems like a reasonable
change for now.
Reviewed-by: Steven Price
Thanks,
Steve
[1] When I get some time I need to rework the "queue jobs on the
hardware"[2] patch I posted ages ago. Last time it actua
to easily read/write the
tags from guest memory, allowing the VMM's mapping to be non-PROT_MTE
while the VMM can still read/write the tags for the purpose of
migration.
Signed-off-by: Steven Price
---
arch/arm64/include/uapi/asm/kvm.h | 13 +++
arch/arm64/kvm/arm.c | 59
are correctly saved/restored across swap.
Signed-off-by: Steven Price
---
arch/arm64/include/asm/kvm_emulate.h | 3 +++
arch/arm64/include/asm/kvm_host.h| 3 +++
arch/arm64/include/asm/pgtable.h | 2 +-
arch/arm64/kernel/mte.c | 36 +---
arch/arm64/kvm/arm.c
-enabled guest
* Rebased on v5.11-rc1
* RFC patch for new MTE tag copy ioctl
[1] https://lore.kernel.org/r/20210108161254.53674-1-steven.pr...@arm.com
[2] https://lore.kernel.org/r/20201127152113.13099-1-steven.pr...@arm.com
Steven Price (3):
arm64: kvm: Save/restore MTE registers
arm64: kvm
Define the new system registers that MTE introduces and context switch
them. The MTE feature is still hidden from the ID register as it isn't
supported in a VM yet.
Signed-off-by: Steven Price
---
arch/arm64/include/asm/kvm_host.h | 4 ++
arch/arm64/include/asm/kvm_mte.h
taking care of those constraints.
Disable devfreq for now on those GPUs.
Signed-off-by: Nicolas Boichat
Reviewed-by: Tomeu Vizoso
Thanks for the clarification in the commit message.
Reviewed-by: Steven Price
---
(no changes since v9)
Changes in v9:
- Explain why devfreq needs
On 13/01/2021 06:07, Nicolas Boichat wrote:
Add support for MT8183's G72 Bifrost.
Signed-off-by: Nicolas Boichat
Reviewed-by: Tomeu Vizoso
LGTM
Reviewed-by: Steven Price
---
(no changes since v7)
Changes in v7:
- Fix GPU ID in commit message
Changes in v6:
- Context conflicts
On 05/01/2021 16:41, Lukasz Luba wrote:
Devfreq framework supports 2 modes for monitoring devices.
Use delayed timer as default instead of deferrable timer
in order to monitor the GPU status regardless of CPU idle.
Signed-off-by: Lukasz Luba
Looks reasonable to me.
Reviewed-by: Steven Price
On 08/01/2021 16:51, Marc Zyngier wrote:
Hi Steven,
On 2021-01-08 16:12, Steven Price wrote:
KASAN in HW_TAGS mode will store MTE tags in the top byte of the
pointer. When computing the offset for TPIDR_EL2 we don't want anything
in the top byte, so remove the tag to ensure the computation
_TAGS")
Signed-off-by: Steven Price
---
Without this fix I can't boot a config with KASAN_HW_TAGS and KVM on an
MTE enabled host. I'm unsure if this should really be in
this_cpu_ptr_nvhe_sym().
arch/arm64/kvm/arm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64
On 05/01/2021 05:36, Nick Fan wrote:
Add a basic GPU node for mt8192.
Signed-off-by: Nick Fan
---
This patch depends on Mediatek power and regulator support.
Listed as following.
[1]https://lore.kernel.org/patchwork/patch/1336293/
On 05/01/2021 00:11, Nicolas Boichat wrote:
GPUs with more than a single regulator (e.g. G-57 on MT8183) will
require platform-specific handling, disable devfreq for now.
Can you explain what actually goes wrong here? AFAICT the existing code
does support controlling multiple regulators - but
On 01/01/2021 16:54, Yangtao Li wrote:
Use devm_pm_opp_* API to simplify code, and remove opp_table
from panfrost_devfreq.
Signed-off-by: Yangtao Li
Reviewed-by: Steven Price
---
drivers/gpu/drm/panfrost/panfrost_devfreq.c | 34 ++---
drivers/gpu/drm/panfrost
On 16/12/2020 07:31, Haibo Xu wrote:
[...]
Hi Steve,
Hi Haibo
I have finished verifying the POC on a FVP setup, and the MTE test case can
be migrated from one VM to another successfully. Since the test case is very
simple which just maps one page with MTE enabled and does some memory
access,
On 07/12/2020 15:27, Peter Maydell wrote:
On Mon, 7 Dec 2020 at 14:48, Steven Price wrote:
Sounds like you are making good progress - thanks for the update. Have
you thought about how the PROT_MTE mappings might work if QEMU itself
were to use MTE? My worry is that we end up with MTE
On 04/12/2020 08:25, Haibo Xu wrote:
On Fri, 20 Nov 2020 at 17:51, Steven Price wrote:
On 19/11/2020 19:11, Marc Zyngier wrote:
On 2020-11-19 18:42, Andrew Jones wrote:
On Thu, Nov 19, 2020 at 03:45:40PM +, Peter Maydell wrote:
On Thu, 19 Nov 2020 at 15:39, Steven Price wrote
On 03/12/2020 17:07, Marc Zyngier wrote:
diff --git a/arch/arm64/include/asm/sysreg.h
b/arch/arm64/include/asm/sysreg.h
index e2ef4c2edf06..b6668ffa04d9 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -569,7 +569,8 @@
#define SCTLR_ELx_M (BIT(0))
On 03/12/2020 16:09, Mark Rutland wrote:
On Fri, Nov 27, 2020 at 03:21:11PM +, Steven Price wrote:
It's been a week, and I think the comments on v5 made it clear that
enforcing PROT_MTE requirements on the VMM was probably the wrong
approach. So since I've got swap working correctly without
On 01/12/2020 12:19, Anshuman Khandual wrote:
This adds validation tests for dirtiness after write protect conversion for
each page table level. There are two new separate test types involved here.
The first test ensures that a given page table entry does not become dirty
after pxx_wrprotect().
On 30/11/2020 15:42, Naresh Kamboju wrote:
Linux next tag 20201130 arm64 build failed due to below error,
- gcc-9, gcc-10 and clang-10 build FAIL
- gcc-8 build PASS.
make --silent --keep-going --jobs=8
O=/home/tuxbuild/.cache/tuxmake/builds/2/tmp ARCH=arm64
Define the new system registers that MTE introduces and context switch
them. The MTE feature is still hidden from the ID register as it isn't
supported in a VM yet.
Signed-off-by: Steven Price
---
arch/arm64/include/asm/kvm_host.h | 4
arch/arm64/include/asm/sysreg.h
are correctly saved/restored across swap.
Signed-off-by: Steven Price
---
arch/arm64/include/asm/kvm_emulate.h | 3 +++
arch/arm64/include/asm/kvm_host.h| 4
arch/arm64/include/asm/pgtable.h | 2 +-
arch/arm64/kernel/mte.c | 18 +-
arch/arm64/kvm/arm.c
memory
PROT_MTE. Instead KVM will set the PG_mte_tagged flag automatically
if not present.
* Fixed swap behaviour vs v4 by always checking for saved MTE tags for
user entries in set_pte_at().
[2] https://lore.kernel.org/r/20201119153901.53705-1-steven.price%40arm.com
Steven Price (2
On 27/11/2020 09:44, Qinglang Miao wrote:
pm_runtime_get_sync will increment pm usage counter even it
failed. Forgetting to putting operation will result in a
reference leak here.
A new function pm_runtime_resume_and_get is introduced in
[0] to keep usage counter balanced. So We fix the
gets macro replaced without requiring
the mm_struct i.e __is_defined(__PAGETABLE_PMD_FOLDED).
Cc: Andrew Morton
Cc: linux...@kvack.org
Cc: linux-kernel@vger.kernel.org
Suggested-by: Catalin Marinas
Signed-off-by: Anshuman Khandual
Reviewed-by: Steven Price
---
mm/debug_vm_pgtable.c | 47
On 20/11/2020 09:56, Marc Zyngier wrote:
On 2020-11-20 09:50, Steven Price wrote:
On 19/11/2020 19:11, Marc Zyngier wrote:
Does this sound reasonable?
I'll clean up the set_pte_at() change and post a v6 later today.
Please hold on. I still haven't reviewed your v5, nor have I had time
On 19/11/2020 19:11, Marc Zyngier wrote:
On 2020-11-19 18:42, Andrew Jones wrote:
On Thu, Nov 19, 2020 at 03:45:40PM +, Peter Maydell wrote:
On Thu, 19 Nov 2020 at 15:39, Steven Price wrote:
> This series adds support for Arm's Memory Tagging Extension (MTE) to
> KVM, allowing KVM
On 19/11/2020 16:24, Catalin Marinas wrote:
On Thu, Nov 19, 2020 at 12:45:52PM +, Steven Price wrote:
On 18/11/2020 17:05, Andrew Jones wrote:
On Wed, Nov 18, 2020 at 04:50:01PM +, Catalin Marinas wrote:
On Wed, Nov 18, 2020 at 04:01:20PM +, Steven Price wrote:
On 17/11/2020 16
On 19/11/2020 15:45, Peter Maydell wrote:
On Thu, 19 Nov 2020 at 15:39, Steven Price wrote:
This series adds support for Arm's Memory Tagging Extension (MTE) to
KVM, allowing KVM guests to make use of it. This builds on the existing
user space support already in v5.10-rc1, see [1
Define the new system registers that MTE introduces and context switch
them. The MTE feature is still hidden from the ID register as it isn't
supported in a VM yet.
Signed-off-by: Steven Price
---
arch/arm64/include/asm/kvm_host.h | 4
arch/arm64/include/asm/sysreg.h
across swap.
Signed-off-by: Steven Price
---
arch/arm64/include/asm/kvm_emulate.h | 3 +++
arch/arm64/include/asm/kvm_host.h| 4
arch/arm64/kvm/arm.c | 9 +
arch/arm64/kvm/mmu.c | 6 ++
arch/arm64/kvm/sys_regs.c| 6 +-
include/uapi
requirement is too strict.
Steven Price (2):
arm64: kvm: Save/restore MTE registers
arm64: kvm: Introduce MTE VCPU feature
arch/arm64/include/asm/kvm_emulate.h | 3 +++
arch/arm64/include/asm/kvm_host.h | 8
arch/arm64/include/asm/sysreg.h| 3 ++-
arch
On 18/11/2020 17:02, Catalin Marinas wrote:
On Wed, Nov 18, 2020 at 04:01:18PM +, Steven Price wrote:
On 17/11/2020 19:20, Marc Zyngier wrote:
On 2020-10-26 15:57, Steven Price wrote:
diff --git a/arch/arm64/include/asm/sysreg.h
b/arch/arm64/include/asm/sysreg.h
index d52c1b3ce589
On 18/11/2020 17:05, Andrew Jones wrote:
On Wed, Nov 18, 2020 at 04:50:01PM +, Catalin Marinas wrote:
On Wed, Nov 18, 2020 at 04:01:20PM +, Steven Price wrote:
On 17/11/2020 16:07, Catalin Marinas wrote:
On Mon, Oct 26, 2020 at 03:57:27PM +, Steven Price wrote:
diff --git a/arch
On 17/11/2020 19:35, Marc Zyngier wrote:
Hi Steven,
On 2020-10-26 15:57, Steven Price wrote:
Add a new VM feature 'KVM_ARM_CAP_MTE' which enables memory tagging
for a VM. This exposes the feature to the guest and automatically tags
memory pages touched by the VM as PG_mte_tagged (and clears
On 17/11/2020 16:07, Catalin Marinas wrote:
Hi Steven,
On Mon, Oct 26, 2020 at 03:57:27PM +, Steven Price wrote:
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index 19aacc7d64de..38fe25310ca1 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -862,6 +862,26
:
On 2020-10-26 15:57, Steven Price wrote:
Define the new system registers that MTE introduces and context switch
them. The MTE feature is still hidden from the ID register as it isn't
supported in a VM yet.
Signed-off-by: Steven Price
Reviewed-by: Andrew Jones
---
arch/arm64/include/asm
On 06/11/2020 07:03, Viresh Kumar wrote:
The dev_pm_opp_put_*() APIs now accepts a NULL opp_table pointer and so
there is no need for us to carry the extra check. Drop them.
Signed-off-by: Viresh Kumar
Reviewed-by: Steven Price
---
drivers/gpu/drm/panfrost/panfrost_devfreq.c | 6
On 03/11/2020 01:48, Yejune Deng wrote:
devm_reset_control_array_get_optional_exclusive() looks more readable
Signed-off-by: Yejune Deng
Reviewed-by: Steven Price
Thanks, I'll push this to drm-misc-next.
Steve
---
drivers/gpu/drm/panfrost/panfrost_device.c | 2 +-
1 file changed, 1
On 02/11/2020 09:33, Zou Wei wrote:
Fixes the following W=1 kernel build warning:
./panfrost_job.c:617:28: warning: unused variable ‘js’ [-Wunused-variable]
struct panfrost_job_slot *js = pfdev->js;
^~
Reported-by: Hulk Robot
Signed-off-by: Zou Wei
Boris
On 02/11/2020 08:54, Yejune Deng wrote:
Some dts hasn't no reset node, is should ok.
Signed-off-by: Yejune Deng
---
drivers/gpu/drm/panfrost/panfrost_device.c | 10 --
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/panfrost/panfrost_device.c
using pm_runtime_set_suspended(). And also
include this on the error path in panfrost_probe().
Fixes: aebe8c22a912 ("drm/panfrost: Fix possible suspend in panfrost_remove")
Signed-off-by: Steven Price
---
drivers/gpu/drm/panfrost/panfrost_drv.c | 5 +++--
1 file changed, 3 insert
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