* Parth Shah [2021-07-28 23:26:06]:
> From: "Gautham R. Shenoy"
>
> The helper function get_shared_cpu_map() was added in
>
> 'commit 500fe5f550ec ("powerpc/cacheinfo: Report the correct
> shared_cpu_map on big-cores")'
>
> and subsequently expanded upon in
>
> 'commit 0be47634db0b
* Parth Shah [2021-07-28 23:26:05]:
> From: "Gautham R. Shenoy"
>
> Currently the cacheinfo code on powerpc indexes the "cache" objects
> (modelling the L1/L2/L3 caches) where the key is device-tree node
> corresponding to that cache. On some of the POWER server platforms
> thread-groups
Le 06/08/2021 à 06:39, Saravana Kannan a écrit :
On Thu, Aug 5, 2021 at 9:35 PM Maxim Kochetkov wrote:
03.08.2021 20:51, Saravana Kannan wrote:
So lets convert this driver to simple platform_device with probe().
Also use platform_get_ and devm_ family function to get/allocate
resources
On Thu, Aug 5, 2021 at 6:09 PM Christophe Leroy
wrote:
>
>
>
> Le 26/07/2021 à 16:30, sxwj...@me.com a écrit :
> > From: Xiongwei Song
> >
> > Create an anonymous union for dar and dear regsiters, we can reference
> > dear to get the effective address when CONFIG_4xx=y or CONFIG_BOOKE=y.
> >
On Thu, Aug 5, 2021 at 6:06 PM Christophe Leroy
wrote:
>
>
>
> Le 26/07/2021 à 16:30, sxwj...@me.com a écrit :
> > From: Xiongwei Song
> >
> > Create an anonymous union for dsisr and esr regsiters, we can reference
> > esr to get the exception detail when CONFIG_4xx=y or CONFIG_BOOKE=y.
> >
hvc framework will never pass stack memory to the put_chars() function,
So the calling of kmemdup() is unnecessary, we can remove it.
This revert commit c4baad5029 ("virtio-console: avoid DMA from stack")
Signed-off-by: Xianting Tian
---
drivers/char/virtio_console.c | 12 ++--
1 file
As well known, hvc backend can register its opertions to hvc backend.
the opertions contain put_chars(), get_chars() and so on.
Some hvc backend may do dma in its opertions. eg, put_chars() of
virtio-console. But in the code of hvc framework, it may pass DMA
incapable memory to put_chars() under
Dear all,
This patch series make hvc framework pass DMA capable memory to
put_chars() of hvc backend(eg, virtio-console), and revert commit
c4baad5029 ("virtio-console: avoid DMA from stack”)
V1
virtio-console: avoid DMA from vmalloc area
https://lkml.org/lkml/2021/7/27/494
For v1 patch, Arnd
Nicholas Piggin writes:
> The softpatch interrupt sets HSRR0 to the faulting instruction +4, so
> it should subtract 4 for the faulting instruction address. Also have it
> emulate and deliver HFAC interrupts correctly, which is important for
> nested HV and facility demand-faulting in future.
(Christophe, you've seen some of this before, however there are new
results added at the end. I've Cc'd the mailing lists this time.)
On Wed, 4 Aug 2021, Stan Johnson wrote:
> On 8/4/21 8:41 PM, Finn Thain wrote:
>
> >
> > $ curl
> >
On Tue, Aug 03, 2021 at 12:01:44PM +0200, Uwe Kleine-König wrote:
> Hello,
>
> changes since v1
> (https://lore.kernel.org/linux-pci/20210729203740.1377045-1-u.kleine-koe...@pengutronix.de):
>
> - New patch to simplify drivers/pci/xen-pcifront.c, spotted and
> suggested by Boris Ostrovsky
> -
On 3/8/21 8:01 pm, Uwe Kleine-König wrote:
This prepares removing the driver member of struct pci_dev which holds the
same information than struct pci_dev::dev->driver.
Signed-off-by: Uwe Kleine-König
cxl hunks look alright.
Acked-by: Andrew Donnellan # cxl
--
Andrew Donnellan
On Wed, May 19, 2021 at 4:01 PM Richard Guy Briggs wrote:
>
> Replace audit syscall class magic numbers with macros.
>
> This required putting the macros into new header file
> include/linux/auditsc_classmacros.h since the syscall macros were
> included for both 64 bit and 32 bit in any compat
The __kvmhv_copy_tofrom_guest_radix function was introduced along with
nested HV guest support. It uses the platform's Radix MMU quadrants to
provide a nested hypervisor with fast access to its nested guests
memory (H_COPY_TOFROM_GUEST hypercall). It has also since been added
as a fast path for
The book3s_64_mmu_radix.o object is not part of the KVM builtins and
all the callers of the exported symbols are in the same kvm-hv.ko
module so we should not need to export any symbols.
Signed-off-by: Fabiano Rosas
---
arch/powerpc/kvm/book3s_64_mmu_radix.c | 3 ---
1 file changed, 3
Both paths into __kvmhv_copy_tofrom_guest_radix ensure that we arrive
with an effective address that is smaller than our total addressable
space and addresses quadrant 0.
- The H_COPY_TOFROM_GUEST hypercall path rejects the call with
H_PARAMETER if the effective address has any of the twelve most
This series contains the fix for __kvmhv_copy_tofrom_guest_radix plus
a couple of changes.
- Patch 1: The fix itself. I thought a smaller fix upfront would be
better to facilitate any backports.
- Patch 2: Adds a sanity check to the low level function. Since the
hcall API
On Tue 2021-08-03 15:18:51, John Ogness wrote:
> Hi,
>
> This is the next part of our printk-rework effort (points 3 and
> 4 of the LPC 2019 summary [0]).
>
> Here the concept of "atomic consoles" is introduced through a
> new (optional) write_atomic() callback for console drivers. This
>
From: Zi Yan
This Kconfig option is used by individual arch to set its desired
MAX_ORDER. Rename it to reflect its actual use.
Signed-off-by: Zi Yan
Cc: Vineet Gupta
Cc: Shawn Guo
Cc: Catalin Marinas
Cc: Guo Ren
Cc: Geert Uytterhoeven
Cc: Thomas Bogendoerfer
Cc: Ley Foon Tan
Cc: Michael
On Thu, 05 Aug 2021, Greg Kroah-Hartman wrote:
> On Thu, Aug 05, 2021 at 06:36:25PM +0100, Catalin Marinas wrote:
> > On Thu, Aug 05, 2021 at 08:50:30AM +0100, Lee Jones wrote:
> > > diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
> > > index b4bb67f17a2ca..cf89ce91d7145
On Thu, Aug 05, 2021 at 06:36:25PM +0100, Catalin Marinas wrote:
> On Thu, Aug 05, 2021 at 08:50:30AM +0100, Lee Jones wrote:
> > diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
> > index b4bb67f17a2ca..cf89ce91d7145 100644
> > --- a/arch/arm64/kernel/process.c
> > +++
On Thu, Aug 05, 2021 at 08:50:30AM +0100, Lee Jones wrote:
> diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
> index b4bb67f17a2ca..cf89ce91d7145 100644
> --- a/arch/arm64/kernel/process.c
> +++ b/arch/arm64/kernel/process.c
> @@ -212,6 +212,7 @@ void machine_restart(char
After LPM, when migrating from a system with security mitigation enabled to
a system with mitigation disabled, the security flavor exposed in /proc is
not correctly set back to 0.
Do not assume the value of the security flavor is set to 0 when entering
init_cpu_char_feature_flags(), so when
https://bugzilla.kernel.org/show_bug.cgi?id=213961
Elimar Riesebieter (riese...@lxtec.de) changed:
What|Removed |Added
Component|PPC-32 |Video(Other)
在 2021/8/5 下午4:09, Jiri Slaby 写道:
On 05. 08. 21, 9:58, Jiri Slaby wrote:
Hi,
On 04. 08. 21, 4:54, Xianting Tian wrote:
@@ -933,6 +949,16 @@ struct hvc_struct *hvc_alloc(uint32_t vtermno,
int data,
hp->outbuf_size = outbuf_size;
hp->outbuf = &((char *)hp)[ALIGN(sizeof(*hp),
https://bugzilla.kernel.org/show_bug.cgi?id=213961
--- Comment #10 from Christophe Leroy (christophe.le...@csgroup.eu) ---
(In reply to Elimar Riesebieter from comment #9)
> Well, 5.13.8 just runs fine, though.
Yes, recent changes to Radeon appear for the first time in v5.14-rc1
--
You may
https://bugzilla.kernel.org/show_bug.cgi?id=213961
--- Comment #9 from Elimar Riesebieter (riese...@lxtec.de) ---
Well, 5.13.8 just runs fine, though.
--
You may reply to this email to add a comment.
You are receiving this mail because:
You are watching the assignee of the bug.
Le 26/07/2021 à 16:30, sxwj...@me.com a écrit :
From: Xiongwei Song
Create an anonymous union for dar and dear regsiters, we can reference
dear to get the effective address when CONFIG_4xx=y or CONFIG_BOOKE=y.
Otherwise, reference dar. This makes code more clear.
Same comment here as for
Le 26/07/2021 à 16:30, sxwj...@me.com a écrit :
From: Xiongwei Song
Create an anonymous union for dsisr and esr regsiters, we can reference
esr to get the exception detail when CONFIG_4xx=y or CONFIG_BOOKE=y.
Otherwise, reference dsisr. This makes code more clear.
I'm not sure it is worth
Le 04/08/2021 à 16:37, Pu Lehui a écrit :
When using kprobe on powerpc booke series processor, Oops happens
as show bellow:
[ 35.861352] Oops: Exception in kernel mode, sig: 5 [#1]
[ 35.861676] BE PAGE_SIZE=4K SMP NR_CPUS=24 QEMU e500
[ 35.861905] Modules linked in:
[ 35.862144] CPU:
Le 13/07/2021 à 07:31, Christopher M. Riedl a écrit :
When code patching a STRICT_KERNEL_RWX kernel the page containing the
address to be patched is temporarily mapped as writeable. Currently, a
per-cpu vmalloc patch area is used for this purpose. While the patch
area is per-cpu, the
Le 13/07/2021 à 07:31, Christopher M. Riedl a écrit :
Rework code-patching with STRICT_KERNEL_RWX to prepare for the next
patch which uses a temporary mm for patching under the Book3s64 Radix
MMU. Make improvements by adding a WARN_ON when the patchsite doesn't
match after patching and return
Hi,
On 09/06/2021 03:34, Jordan Niethe wrote:
> From: Russell Currey
>
> To enable strict module RWX on powerpc, set:
>
> CONFIG_STRICT_MODULE_RWX=y
>
> You should also have CONFIG_STRICT_KERNEL_RWX=y set to have any real
> security benefit.
>
> ARCH_HAS_STRICT_MODULE_RWX is set to
Le 13/07/2021 à 07:31, Christopher M. Riedl a écrit :
x86 supports the notion of a temporary mm which restricts access to
temporary PTEs to a single CPU. A temporary mm is useful for situations
where a CPU needs to perform sensitive operations (such as patching a
STRICT_KERNEL_RWX kernel)
To avoid ambiguity, modify the strings in real address error
logging messages to "foreign/control memory" from "foreign",
Since the error discriptions in P9 user manual and P10 user
manual are different for same type of errors.
P9 User Manual for MCE:
DSISR:59 Host real address to foreign space
Add test for real address or control memory address access
error handling, using NX-GZIP engine.
The error is injected by accessing the control memory address
using illegal instruction, on successful handling the process
attempting to access control memory address using illegal
instruction
Add support to parse and log control memory access
error for pseries.
Signed-off-by: Ganesh Goudar
---
v2: No changes in this patch.
---
arch/powerpc/platforms/pseries/ras.c | 21 +
1 file changed, 21 insertions(+)
diff --git a/arch/powerpc/platforms/pseries/ras.c
Le 13/07/2021 à 07:31, Christopher M. Riedl a écrit :
Code patching on powerpc with a STRICT_KERNEL_RWX uses a userspace
address in a temporary mm on Radix now. Use __put_user() to avoid write
failures due to KUAP when attempting a "hijack" on the patching address.
__put_user() also works
On Thu, Aug 05, 2021 at 08:50:30AM +0100, Lee Jones wrote:
> A recent attempt to convert the Power Reset Restart driver to tristate
> failed because of the following compile error (reported once merged by
> Stephen Rothwell via Linux Next):
>
> ERROR: "machine_restart"
On Sat, Jul 31, 2021 at 03:00:20PM +0900, Masahiro Yamada wrote:
> arm, arm64, csky, mips, powerpc always select GENERIC_GETTIMEOFDAY,
> hence $(gettimeofday-y) never becomes empty.
>
> riscv conditionally selects GENERIC_GETTIMEOFDAY when MMU=y && 64BIT=y,
> but
Le 13/07/2021 à 07:31, Christopher M. Riedl a écrit :
When live patching with STRICT_KERNEL_RWX the CPU doing the patching
must temporarily remap the page(s) containing the patch site with +W
permissions. While this temporary mapping is in use, another CPU could
write to the same mapping and
Le 13/07/2021 à 07:31, Christopher M. Riedl a écrit :
A previous commit implemented an LKDTM test on powerpc to exploit the
temporary mapping established when patching code with STRICT_KERNEL_RWX
enabled. Extend the test to work on x86_64 as well.
Signed-off-by: Christopher M. Riedl
---
Le 13/07/2021 à 07:31, Christopher M. Riedl a écrit :
When compiled with CONFIG_STRICT_KERNEL_RWX, the kernel must create
temporary mappings when patching itself. These mappings temporarily
override the strict RWX text protections to permit a write. Currently,
powerpc allocates a per-CPU VM
在 2021/8/5 下午4:18, Greg KH 写道:
On Thu, Aug 05, 2021 at 04:08:46PM +0800, Xianting Tian wrote:
在 2021/8/5 下午3:58, Jiri Slaby 写道:
Hi,
On 04. 08. 21, 4:54, Xianting Tian wrote:
@@ -933,6 +949,16 @@ struct hvc_struct *hvc_alloc(uint32_t vtermno,
int data,
hp->outbuf_size = outbuf_size;
Le 27/07/2021 à 08:55, Jordan Niethe a écrit :
Implement commit 40272035e1d0 ("powerpc/bpf: Reallocate BPF registers to
volatile registers when possible on PPC32") for PPC64.
When the BPF routine doesn't call any function, the non volatile
registers can be reallocated to volatile registers
在 2021/8/5 下午3:58, Jiri Slaby 写道:
Hi,
On 04. 08. 21, 4:54, Xianting Tian wrote:
@@ -933,6 +949,16 @@ struct hvc_struct *hvc_alloc(uint32_t vtermno,
int data,
hp->outbuf_size = outbuf_size;
hp->outbuf = &((char *)hp)[ALIGN(sizeof(*hp), sizeof(long))];
+ /*
+ *
From: yong yiran
'inttypes.h' included in 'tm-poison.c' is duplicated.
Remove all but the first include of inttypes.h from tm-poison.c.
Reported-by: Zeal Robot
Signed-off-by: yong yiran
---
tools/testing/selftests/powerpc/tm/tm-poison.c | 1 -
1 file changed, 1 deletion(-)
diff --git
On Thu, Aug 05, 2021 at 04:08:46PM +0800, Xianting Tian wrote:
>
> 在 2021/8/5 下午3:58, Jiri Slaby 写道:
> > Hi,
> >
> > On 04. 08. 21, 4:54, Xianting Tian wrote:
> > > @@ -933,6 +949,16 @@ struct hvc_struct *hvc_alloc(uint32_t vtermno,
> > > int data,
> > > hp->outbuf_size = outbuf_size;
> >
On 2021/8/5 14:13, Michael Ellerman wrote:
Pu Lehui writes:
When using kprobe on powerpc booke series processor, Oops happens
as show bellow:
[ 35.861352] Oops: Exception in kernel mode, sig: 5 [#1]
[ 35.861676] BE PAGE_SIZE=4K SMP NR_CPUS=24 QEMU e500
[ 35.861905] Modules linked in:
On 05. 08. 21, 9:58, Jiri Slaby wrote:
Hi,
On 04. 08. 21, 4:54, Xianting Tian wrote:
@@ -933,6 +949,16 @@ struct hvc_struct *hvc_alloc(uint32_t vtermno,
int data,
hp->outbuf_size = outbuf_size;
hp->outbuf = &((char *)hp)[ALIGN(sizeof(*hp), sizeof(long))];
This deserves cleanup
https://bugzilla.kernel.org/show_bug.cgi?id=213961
--- Comment #8 from Christophe Leroy (christophe.le...@csgroup.eu) ---
Great:
[ 15.246367] NIP [bea42a80] radeon_agp_head_init+0x1c/0xf8 [radeon]
[ 15.246969] LR [bea39860] radeon_driver_load_kms+0x1bc/0x1f4 [radeon]
[ 15.247160] Call
Hi,
On 04. 08. 21, 4:54, Xianting Tian wrote:
@@ -933,6 +949,16 @@ struct hvc_struct *hvc_alloc(uint32_t vtermno, int data,
hp->outbuf_size = outbuf_size;
hp->outbuf = &((char *)hp)[ALIGN(sizeof(*hp), sizeof(long))];
+ /*
+* hvc_con_outbuf is guaranteed to be aligned
The powernv_get_random_long() does not work in nested KVM (which is
pseries) and produces a crash when accessing in_be64(rng->regs) in
powernv_get_random_long().
This replaces powernv_get_random_long with the ppc_md machine hook
wrapper.
Signed-off-by: Alexey Kardashevskiy
---
Changes:
v2:
*
A recent attempt to convert the Power Reset Restart driver to tristate
failed because of the following compile error (reported once merged by
Stephen Rothwell via Linux Next):
ERROR: "machine_restart" [drivers/power/reset/restart-poweroff.ko] undefined!
This error occurs since some of the
Provide support to compile the Power-Off driver as a module.
Elliot Berman (2):
reboot: Export reboot_mode
power: reset: Enable tristate on restart power-off driver
Lee Jones (1):
arch: Export machine_restart() instances so they can be called from
modules
arch/arc/kernel/reset.c
On Thu, Aug 05, 2021 at 12:54:34PM +0530, Bharata B Rao wrote:
> Hi,
>
> This series adds asynchronous page fault support for pseries guests
> and enables the support for the same in powerpc KVM. This is an
> early RFC with details and multiple TODOs listed in patch descriptions.
>
> This patch
Add asynchronous page fault support for pseries guests.
1. Setup the guest to handle async-pf
- Issue H_REG_SNS hcall to register the SNS region.
- Setup the subvention interrupt irq.
- Enable async-pf by updating the byte_b9 of VPA for each
CPU.
2. Check if the page fault is an
Add asynchronous page fault support for PowerKVM by making
use of the Expropriation/Subvention Notification Option
defined by PAPR specifications.
1. When guest accessed page isn't immediately available in the
host, update the vcpu's VPA with a unique expropriation correlation
number and inject a
kvmppc_core_queue_data_storage() doesn't provide an option to
set SRR1 flags when raising DSI. Since kvmppc_inject_interrupt()
allows for such a provision, add an argument to allow the same.
This will be used to raise DSI with SRR1_PROGTRAP set when
expropriation interrupt needs to be injected to
Add a new KVM exit request KVM_REQ_ESN_EXIT that will be used
to exit to userspace (QEMU) whenever subvention notification
needs to be sent to the guest.
The userspace (QEMU) issues the subvention notification by
injecting an interrupt into the guest.
Signed-off-by: Bharata B Rao
---
Hi,
This series adds asynchronous page fault support for pseries guests
and enables the support for the same in powerpc KVM. This is an
early RFC with details and multiple TODOs listed in patch descriptions.
This patch needs supporting enablement in QEMU too which will be
posted separately.
VPA byte offset 0xB9 was named as donate_dedicated_cpu as that
was the only used bit. The Expropriation/Subvention support defines
a bit in byte offset 0xB9. Define this bit and rename the field
in VPA to a generic name.
Signed-off-by: Bharata B Rao
---
arch/powerpc/include/asm/lppaca.h | 8
Le 26/07/2021 à 05:49, Nicholas Piggin a écrit :
Rather than have KVM look up the host timer and fiddle with the
irq-work internal details, have the powerpc/time.c code provide a
function for KVM to re-arm the Linux timer code when exiting a
guest.
This is implementation has an improvement
Pu Lehui writes:
> When using kprobe on powerpc booke series processor, Oops happens
> as show bellow:
>
> [ 35.861352] Oops: Exception in kernel mode, sig: 5 [#1]
> [ 35.861676] BE PAGE_SIZE=4K SMP NR_CPUS=24 QEMU e500
> [ 35.861905] Modules linked in:
> [ 35.862144] CPU: 0 PID: 76 Comm:
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