The virtual real mode addressing (VRMA) mechanism is used when a
partition is using HPT (Hash Page Table) translation and performs
real mode accesses (MSR[IR|DR] = 0) in non-hypervisor mode. In this
mode effective address bits 0:23 are treated as zero (i.e. the access
is aliased to 0) and the
ptrace-hwbreak.c selftest is logically broken. On powerpc, when
watchpoint is created with ptrace, signals are generated before
executing the instruction and user has to manually singlestep
the instruction with watchpoint disabled, which selftest never
does and thus it keeps on getting the signal
On Powerpc64, watchpoint match range is double-word granular. On
a watchpoint hit, DAR is set to the first byte of overlap between
actual access and watched range. And thus it's quite possible that
DAR does not point inside user specified range. Ex, say user creates
a watchpoint with address range
v2: https://lists.ozlabs.org/pipermail/linuxppc-dev/2019-July/192967.html
v2->v3:
- Rebase to powerpc/next
- PATCH 2/3 is new
Ravi Bangoria (3):
Powerpc64/Watchpoint: Fix length calculation for unaligned target
Powerpc64/Watchpoint: Don't ignore extraneous exceptions
Watchpoint match range is always doubleword(8 bytes) aligned on
powerpc. If the given range is crossing doubleword boundary, we
need to increase the length such that next doubleword also get
covered. Ex,
address len = 6 bytes
|=.
Hi Dan,
Can you merge this to your tree?
-aneesh
"Aneesh Kumar K.V" writes:
> This series handle configs where hugepage support is not enabled by default.
> Also, we update some of the information messages to make sure we use
> PAGE_SIZE instead
> of SZ_4K. We now store page size and struct
This patch fixes below issue reported by coccicheck
sound/ppc/snd_ps3.c:631:5-8: Unneeded variable: "ret". Return "0" on
line 668
We cannot change return type of snd_ps3_pcm_trigger as it is registered
with snd_pcm_ops->trigger
Signed-off-by: Hariprasad Kelam
---
sound/ppc/snd_ps3.c | 3 +--
1
Hi Thomas,
Thanks for you comments
On 6/25/19 3:45 PM, Thomas Gleixner wrote:
> Hoan,
>
> On Tue, 25 Jun 2019, Hoan Tran OS wrote:
>
> Please use 'x86/Kconfig: ' as prefix.
>
>> This patch removes CONFIG_NODES_SPAN_OTHER_NODES as it's
>> enabled by default with NUMA.
>
> Please do not use
On 7/9/2019 5:40 PM, Christoph Hellwig wrote:
On Tue, Jul 09, 2019 at 05:37:18PM +0300, Max Gurtovoy wrote:
On 7/9/2019 5:32 PM, Christoph Hellwig wrote:
On Tue, Jul 09, 2019 at 05:31:37PM +0300, Max Gurtovoy wrote:
Are we ok with working on a solution during kernel-5.3 cycle ?
You can
On 7/9/2019 5:32 PM, Christoph Hellwig wrote:
On Tue, Jul 09, 2019 at 05:31:37PM +0300, Max Gurtovoy wrote:
Are we ok with working on a solution during kernel-5.3 cycle ?
You can start working on it any time, no need to ask for permission.
I just want to make sure we don't remove it from
On 7/9/2019 4:59 PM, Christoph Hellwig wrote:
On Tue, Jul 09, 2019 at 01:49:04PM +, Max Gurtovoy wrote:
Hi Greg/Christoph,
Can we leave it meanwhile till we'll find a general solution (for the upcoming
kernel) ?
I guess we can somehow generalize the P2P initialization process for PPC and
Hi Greg/Christoph,
Can we leave it meanwhile till we'll find a general solution (for the upcoming
kernel) ?
I guess we can somehow generalize the P2P initialization process for PPC and
leave it empty for now for other archs.
Or maybe we can find some other solution (sysfs/configfs/module param),
On Tue, Jul 09, 2019 at 06:06:54PM +0300, Max Gurtovoy wrote:
>
> On 7/9/2019 5:40 PM, Christoph Hellwig wrote:
> > On Tue, Jul 09, 2019 at 05:37:18PM +0300, Max Gurtovoy wrote:
> > > On 7/9/2019 5:32 PM, Christoph Hellwig wrote:
> > > > On Tue, Jul 09, 2019 at 05:31:37PM +0300, Max Gurtovoy
On 2019-07-09 05:25, Bharata B Rao wrote:
- After the guest becomes secure, when we handle a page fault of a page
belonging to SVM in HV, send that page to UV via UV_PAGE_IN.
- Whenever a page is unmapped on the HV side, inform UV via
UV_PAGE_INVAL.
- Ensure all those routines that walk the
We're not using them, so we can drop the parsing.
Signed-off-by: Sven Schnelle
---
include/linux/kexec.h | 1 -
kernel/kexec_elf.c| 137 --
2 files changed, 138 deletions(-)
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index
It wasn't used anywhere, so lets drop it.
Signed-off-by: Sven Schnelle
---
kernel/kexec_elf.c | 4
1 file changed, 4 deletions(-)
diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c
index 99e6d63b5dfc..b7e47ddd7cad 100644
--- a/kernel/kexec_elf.c
+++ b/kernel/kexec_elf.c
@@ -8,10 +8,6 @@
Change the order to have a 64/32/16 order, no functional change.
Signed-off-by: Sven Schnelle
---
kernel/kexec_elf.c | 12 ++--
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c
index 6e9f52171ede..76e7df64d715 100644
---
Right now powerpc provides an implementation to read elf files
with the kexec_file() syscall. Make that available as a public
kexec interface so it can be re-used on other architectures.
Signed-off-by: Sven Schnelle
---
arch/Kconfig | 3 +
arch/powerpc/Kconfig
It's not used anywhere so just drop it.
Signed-off-by: Sven Schnelle
---
kernel/kexec_elf.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c
index effe9dc0b055..70d31b8feeae 100644
--- a/kernel/kexec_elf.c
+++ b/kernel/kexec_elf.c
@@ -8,8 +8,6 @@
It had only one definition, so just use the function directly.
Signed-off-by: Sven Schnelle
---
kernel/kexec_elf.c | 20 +---
1 file changed, 9 insertions(+), 11 deletions(-)
diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c
index 70d31b8feeae..99e6d63b5dfc 100644
---
Hi List,
i've split up the patch a bit more. The first one move the generic elf stuff
out of arch/powerpc to linux/kexec_elf.c, and prefixes the exposed functions
with kexec_. That other patches remove stuff that is not used as proposed in
the review.
Changes to v1:
- split up patch into
base was never unsigned, so we can remove it.
Signed-off-by: Sven Schnelle
---
kernel/kexec_elf.c | 7 ++-
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c
index b7e47ddd7cad..a56ec5481e71 100644
--- a/kernel/kexec_elf.c
+++
On 2019-07-09 05:25, Bharata B Rao wrote:
Register the new memslot with UV during plug and unregister
the memslot during unplug.
Signed-off-by: Bharata B Rao
Acked-by: Paul Mackerras
Reviewed-by: Janani Janakiraman
---
arch/powerpc/include/asm/ultravisor-api.h | 1 +
On 2019-07-09 05:25, Bharata B Rao wrote:
H_SVM_INIT_START: Initiate securing a VM
H_SVM_INIT_DONE: Conclude securing a VM
As part of H_SVM_INIT_START, register all existing memslots with
the UV. H_SVM_INIT_DONE call by UV informs HV that transition of
the guest to secure mode is complete.
On 2019-07-09 05:25, Bharata B Rao wrote:
A secure guest will share some of its pages with hypervisor (Eg. virtio
bounce buffers etc). Support shared pages in HMM driver.
Once a secure page is converted to shared page, HMM driver will stop
tracking that page.
Signed-off-by: Bharata B Rao
On 2019-07-09 05:25, Bharata B Rao wrote:
HMM driver for KVM PPC to manage page transitions of
secure guest via H_SVM_PAGE_IN and H_SVM_PAGE_OUT hcalls.
H_SVM_PAGE_IN: Move the content of a normal page to secure page
H_SVM_PAGE_OUT: Move the content of a secure page to normal page
Private
On Tue, Jul 09, 2019 at 08:21:54AM +0530, Aneesh Kumar K.V wrote:
> On 7/9/19 7:50 AM, Oliver O'Halloran wrote:
> >I don't think it's that, there's some magic in flush_icache_range() to
> >handle dropping prefetched instructions on 970.
> >
> >>So overall wondering why we need that extra barriers
On Mon, Jul 08, 2019 at 03:43:04PM -0700, Christoph Hellwig wrote:
> On Mon, Jul 08, 2019 at 06:24:04PM -0400, Mimi Zohar wrote:
> > > static int tpm_get_pcr_allocation(struct tpm_chip *chip)
> > > {
> > > int rc;
> > >
> > > rc = (chip->flags & TPM_CHIP_FLAG_TPM2) ?
> > >
On Mon, Jul 08, 2019 at 06:24:04PM -0400, Mimi Zohar wrote:
> > static int tpm_get_pcr_allocation(struct tpm_chip *chip)
> > {
> > int rc;
> >
> > rc = (chip->flags & TPM_CHIP_FLAG_TPM2) ?
> > tpm2_get_pcr_allocation(chip) :
> >
*** [drivers/gpu/drm] Error 2
> make[2]: *** [drivers/gpu] Error 2
>
> Kernel version: 5.2.0-next-20190708
> Machine: Power 9
> Kernel config attached
>
> --
> Regard's
>
> Abdul Haleem
> IBM Linux Technology Centre
>
This
> According to Markus's suggestion, split it into two small patches:
> https://lkml.org/lkml/2019/7/8/520
Thanks that you picked adjustment possibilities up from my feedback.
https://lore.kernel.org/lkml/99840e11-e0e6-b3f4-e35b-56ef4ec39...@web.de/
Now I wonder why you omitted message
Fuqian Huang writes:
> kmemdup is introduced to duplicate a region of memory in a neat way.
> Rather than kmalloc/kzalloc + memcpy, which the programmer needs to
> write the size twice (sometimes lead to mistakes), kmemdup improves
> readability, leads to smaller code and also reduce the chances
On Tue, Jul 09, 2019 at 06:06:54PM +0300, Max Gurtovoy wrote:
> Also this code was merged before the p2p API for p2pmem.
Yes, without a single user or intention to submit a user, and without
covering the most useful use case (PCIe switches). While at the same
time the people involved completely
Michael Ellerman writes:
> Nathan Lynch writes:
>> "Aneesh Kumar K.V" writes:
Just checking: do people still need numa=off? Seems like it's a
maintenance burden :-)
>>>
>>> That is used in kdump kernel.
>>
>> I see, thanks.
>
> That doesn't mean it's a good idea :)
>
> Does it
On Tue, Jul 09, 2019 at 05:37:18PM +0300, Max Gurtovoy wrote:
>
> On 7/9/2019 5:32 PM, Christoph Hellwig wrote:
>> On Tue, Jul 09, 2019 at 05:31:37PM +0300, Max Gurtovoy wrote:
>>> Are we ok with working on a solution during kernel-5.3 cycle ?
>> You can start working on it any time, no need to
On Tue, Jul 09, 2019 at 05:31:37PM +0300, Max Gurtovoy wrote:
> Are we ok with working on a solution during kernel-5.3 cycle ?
You can start working on it any time, no need to ask for permission.
On Tue, Jul 09, 2019 at 01:49:04PM +, Max Gurtovoy wrote:
> Hi Greg/Christoph,
> Can we leave it meanwhile till we'll find a general solution (for the
> upcoming kernel) ?
> I guess we can somehow generalize the P2P initialization process for PPC and
> leave it empty for now for other archs.
On Tue, Jul 09, 2019 at 07:04:43AM +0200, Christophe Leroy wrote:
> Le 08/07/2019 à 21:14, Nathan Chancellor a écrit :
> >On Mon, Jul 08, 2019 at 11:19:30AM +1000, Michael Ellerman wrote:
> >>On Fri, 2019-05-10 at 09:24:48 UTC, Christophe Leroy wrote:
> >>>Cache instructions (dcbz, dcbi, dcbf and
If we take a UE on one of the instructions with a fixup entry, set nip
to continue execution at the fixup entry. Stop processing the event
further or print it.
Based-on-patch-by: Reza Arbab
Cc: Reza Arbab
Cc: Mahesh Salgaonkar
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/include/asm/mce.h
Use memcpy_mcsafe() implementation to define copy_to_user_mcsafe()
Signed-off-by: Santosh Sivaraj
---
arch/powerpc/Kconfig | 1 +
arch/powerpc/include/asm/uaccess.h | 14 ++
2 files changed, 15 insertions(+)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
In real mode, the search_exception tables cannot be called because
it also searches the module exception tables if entry is not found
in the kernel exception tables.
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: Nicholas Piggin
Signed-off-by: Santosh Sivaraj
---
include/linux/extable.h | 2 ++
From: Balbir Singh
The pmem infrastructure uses memcpy_mcsafe in the pmem layer so as to
convert machine check exceptions into a return value on failure in case
a machine check exception is encountered during the memcpy. The return
value is the number of bytes remaining to be copied.
This patch
From: Balbir Singh
The current code would fail on huge pages addresses, since the shift
would be incorrect. Use the correct page shift value returned by
__find_linux_pte() to get the correct pfn. The code is more generic
and can handle both regular and compound pages.
Fixes: ba41e1e1ccb9
From: Reza Arbab
The function doesn't get used outside this file, so make it static.
Signed-off-by: Reza Arbab
Signed-off-by: Santosh Sivaraj
Reviewed-by: Nicholas Piggin
---
arch/powerpc/kernel/mce.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git
During a memcpy from a pmem device, if a machine check exception is
generated we end up in a panic. In case of fsdax read, this should
only result in a -EIO. Avoid MCE by implementing memcpy_mcsafe.
Before this patch series:
```
bash-4.4# mount -o dax /dev/pmem0 /mnt/pmem/
[ 7621.714094]
Rename the jump labels according to the cleanup they perform,
and move reference handling to simplify cleanup.
Signed-off-by: Wen Yang
Cc: Scott Wood
Cc: Kumar Gala
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: Markus Elfring
Cc: linuxppc-dev@lists.ozlabs.org
Cc:
The immr_node variable is still being used after the of_node_put() call,
which may result in use-after-free.
Fix this issue by calling of_node_put() after the last usage.
Fixes: fd066e850351 ("powerpc/mpc8308: fix USB DR controller initialization")
Signed-off-by: Wen Yang
Cc: Scott Wood
Cc:
From: Anshuman Khandual
CONFIG_PPC_UV adds support for ultravisor.
Signed-off-by: Anshuman Khandual
Signed-off-by: Bharata B Rao
Signed-off-by: Ram Pai
[ Update config help and commit message ]
Signed-off-by: Claudio Carvalho
---
arch/powerpc/Kconfig | 20
1 file
Add support for reset of secure guest via a new ioctl KVM_PPC_SVM_OFF.
This ioctl will be issued by QEMU during reset and includes the
the following steps:
- Ask UV to terminate the guest via UV_SVM_TERMINATE ucall
- Unpin the VPA pages so that they can be migrated back to secure
side when
- After the guest becomes secure, when we handle a page fault of a page
belonging to SVM in HV, send that page to UV via UV_PAGE_IN.
- Whenever a page is unmapped on the HV side, inform UV via UV_PAGE_INVAL.
- Ensure all those routines that walk the secondary page tables of
the guest don't do
Register the new memslot with UV during plug and unregister
the memslot during unplug.
Signed-off-by: Bharata B Rao
Acked-by: Paul Mackerras
---
arch/powerpc/include/asm/ultravisor-api.h | 1 +
arch/powerpc/include/asm/ultravisor.h | 7 +++
arch/powerpc/kvm/book3s_hv.c |
H_SVM_INIT_START: Initiate securing a VM
H_SVM_INIT_DONE: Conclude securing a VM
As part of H_SVM_INIT_START, register all existing memslots with
the UV. H_SVM_INIT_DONE call by UV informs HV that transition of
the guest to secure mode is complete.
These two states (transition to secure mode
A secure guest will share some of its pages with hypervisor (Eg. virtio
bounce buffers etc). Support shared pages in HMM driver.
Once a secure page is converted to shared page, HMM driver will stop
tracking that page.
Signed-off-by: Bharata B Rao
---
arch/powerpc/include/asm/hvcall.h | 3 ++
HMM driver for KVM PPC to manage page transitions of
secure guest via H_SVM_PAGE_IN and H_SVM_PAGE_OUT hcalls.
H_SVM_PAGE_IN: Move the content of a normal page to secure page
H_SVM_PAGE_OUT: Move the content of a secure page to normal page
Private ZONE_DEVICE memory equal to the amount of secure
Hi,
A pseries guest can be run as a secure guest on Ultravisor-enabled
POWER platforms. On such platforms, this driver will be used to manage
the movement of guest pages between the normal memory managed by
hypervisor (HV) and secure memory managed by Ultravisor (UV).
Private ZONE_DEVICE memory
On Mon, Jun 17, 2019 at 02:06:32PM +1000, Paul Mackerras wrote:
> On Tue, May 28, 2019 at 12:19:33PM +0530, Bharata B Rao wrote:
> > Add support for reset of secure guest via a new ioctl KVM_PPC_SVM_OFF.
> > This ioctl will be issued by QEMU during reset and in this ioctl,
> > we ask UV to
On Tue, Jun 18, 2019 at 08:05:26PM -0300, Thiago Jung Bauermann wrote:
>
> Hello Bharata,
>
> Bharata B Rao writes:
>
> > diff --git a/arch/powerpc/include/asm/kvm_book3s_hmm.h
> > b/arch/powerpc/include/asm/kvm_book3s_hmm.h
> > index 21f3de5f2acb..3e13dab7f690 100644
> > ---
On Mon, Jun 17, 2019 at 03:37:56PM +1000, Paul Mackerras wrote:
> On Tue, May 28, 2019 at 12:19:30PM +0530, Bharata B Rao wrote:
> > H_SVM_INIT_START: Initiate securing a VM
> > H_SVM_INIT_DONE: Conclude securing a VM
> >
> > As part of H_SVM_INIT_START register all existing memslots with the UV.
On Mon, Jun 17, 2019 at 03:31:06PM +1000, Paul Mackerras wrote:
> On Tue, May 28, 2019 at 12:19:28PM +0530, Bharata B Rao wrote:
> > HMM driver for KVM PPC to manage page transitions of
> > secure guest via H_SVM_PAGE_IN and H_SVM_PAGE_OUT hcalls.
> >
> > H_SVM_PAGE_IN: Move the content of a
On 09-07-19, 16:04, Wen Yang wrote:
> The cpu variable is still being used in the of_get_property() call
> after the of_node_put() call, which may result in use-after-free.
>
> Fixes: a9acc26b75f ("cpufreq/pasemi: fix possible object reference leak")
> Signed-off-by: Wen Yang
> Cc: "Rafael J.
On 5/6/19 5:42 pm, Andrew Donnellan wrote:
On 24/5/19 12:46 pm, Christopher M. Riedl wrote:
Add support for disabling the kernel implemented spectre v2 mitigation
(count cache flush on context switch) via the nospectre_v2 and
mitigations=off cmdline options.
Suggested-by: Michael Ellerman
The cpu variable is still being used in the of_get_property() call
after the of_node_put() call, which may result in use-after-free.
Fixes: a9acc26b75f ("cpufreq/pasemi: fix possible object reference leak")
Signed-off-by: Wen Yang
Cc: "Rafael J. Wysocki"
Cc: Viresh Kumar
Cc: Michael Ellerman
On Tue, Jul 09, 2019 at 07:04:43AM +0200, Christophe Leroy wrote:
>
>
> Le 08/07/2019 à 21:14, Nathan Chancellor a écrit :
> > On Mon, Jul 08, 2019 at 11:19:30AM +1000, Michael Ellerman wrote:
> > > On Fri, 2019-05-10 at 09:24:48 UTC, Christophe Leroy wrote:
> > > > Cache instructions (dcbz,
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