On Wed, 2022-02-23 at 17:11 +1000, Nicholas Piggin wrote:
> Excerpts from Haren Myneni's message of February 20, 2022 5:59 am:
> > The paste address mapping is done with mmap() after the window is
> > opened with ioctl. If the window is closed by OS in the hypervisor
> > due to DLPAR after this mma
On Wed, 2022-02-23 at 17:23 +1000, Nicholas Piggin wrote:
> Excerpts from Haren Myneni's message of February 20, 2022 6:00 am:
> > The hypervisor assigns vas credits (windows) for each LPAR based
> > on the number of cores configured in that system. The OS is
> > expected to release credits when co
On Wed, 2022-02-23 at 17:28 +1000, Nicholas Piggin wrote:
> Excerpts from Haren Myneni's message of February 20, 2022 6:01 am:
> > VAS windows can be closed in the hypervisor due to lost credits
> > when the core is removed and the kernel gets fault for NX
> > requests on these in-active windows. I
On Wed, 2022-02-23 at 17:33 +1000, Nicholas Piggin wrote:
> Excerpts from Haren Myneni's message of February 20, 2022 6:03 am:
> > pseries supports two types of credits - Default (uses normal
> > priority
> > FIFO) and Qality of service (QoS uses high priority FIFO). The user
> > decides the number
On Wed, Feb 23, 2022 at 9:42 AM Palmer Dabbelt wrote:
>
> On Tue, 01 Feb 2022 07:05:33 PST (-0800), guo...@kernel.org wrote:
> > From: Guo Ren
> >
> > Implement riscv asm/compat.h for struct compat_xxx,
> > is_compat_task, compat_user_regset, regset convert.
> >
> > The rv64 compat.h has inherite
On Wed, Feb 23, 2022 at 9:42 AM Palmer Dabbelt wrote:
>
> On Tue, 01 Feb 2022 07:05:37 PST (-0800), guo...@kernel.org wrote:
> > From: Guo Ren
> >
> > If the current task is in COMPAT mode, set SR_UXL_32 in status for
> > returning userspace. We need CONFIG _COMPAT to prevent compiling
> > errors
On Wed, Feb 23, 2022 at 8:41 AM Thomas Bogendoerfer
wrote:
>
> On Wed, Feb 16, 2022 at 02:13:23PM +0100, Arnd Bergmann wrote:
> > diff --git a/arch/mips/include/asm/uaccess.h
> > b/arch/mips/include/asm/uaccess.h
> > index db9a8e002b62..d7c89dc3426c 100644
> > --- a/arch/mips/include/asm/uaccess.
Excerpts from Haren Myneni's message of February 20, 2022 6:04 am:
>
> Virtual Accelerator Switchboard (VAS) is an engine stays on the
> chip. So all windows opened on a specific engine belongs to VAS
> the chip.
The problem is more that PAPR does not virtualise the VAS windows,
right? That's a w
Excerpts from Haren Myneni's message of February 20, 2022 6:05 am:
>
> The coprocessor capabilities struct is used to get default and
> QoS capabilities from the hypervisor during init, DLPAR event and
> migration. So instead of allocating this struct for each event,
> define global struct and reu
On Wed, 2022-02-23 at 19:38 +1000, Nicholas Piggin wrote:
> Excerpts from Haren Myneni's message of February 20, 2022 6:04 am:
> > Virtual Accelerator Switchboard (VAS) is an engine stays on the
> > chip. So all windows opened on a specific engine belongs to VAS
> > the chip.
>
> The problem is mo
Excerpts from Haren Myneni's message of February 20, 2022 6:05 am:
>
> VAS is a hardware engine stays on the chip. So when the partition
> migrates, all VAS windows on the source system have to be closed
> and reopen them on the destination after migration.
>
> This patch make changes to the curr
On Wed, Feb 23, 2022 at 9:42 AM Palmer Dabbelt wrote:
>
> On Tue, 01 Feb 2022 07:05:40 PST (-0800), guo...@kernel.org wrote:
> > From: Guo Ren
> >
> > There is no vgettimeofday supported in rv32 that makes simple to
> > generate rv32 vdso code which only needs riscv64 compiler. Other
> > architec
Excerpts from Haren Myneni's message of February 20, 2022 6:06 am:
>
> Since the VAS windows belong to the VAS hardware resource, the
> hypervisor expects the partition to close them on source partition
> and reopen them after the partition migrated on the destination
> machine.
>
> This handler
Excerpts from Haren Myneni's message of February 20, 2022 6:08 am:
>
> The current partition migration implementation does not freeze the
> user space and the user space can continue open VAS windows. So
> when migration_in_progress flag is enabled, VAS open window
> API returns -EBUSY.
Seems lik
On Wed, Feb 23, 2022 at 2:43 AM Palmer Dabbelt wrote:
>
> On Tue, 01 Feb 2022 07:05:24 PST (-0800), guo...@kernel.org wrote:
> > From: Guo Ren
> >
> > Currently, most 64-bit architectures (x86, parisc, powerpc, arm64,
> > s390, mips, sparc) have supported COMPAT mode. But they all have
> > histor
mpc8xx_pic_init() should return -ENOMEM instead of 0 when
irq_domain_add_linear() return NULL. This cause mpc8xx_pics_init to continue
executing even if mpc8xx_pic_host is NULL.
Fixes: cc76404feaed ("powerpc/8xx: Fix possible device node reference leak")
Signed-off-by: Hangyu Hua
---
arch/powerp
Fix following coccicheck warning:
./arch/powerpc/kernel/module_64.c:432:40-41: WARNING: Use ARRAY_SIZE.
ARRAY_SIZE(arr) is a macro provided by the kernel. It makes sure that arr
is an array, so it's safer than sizeof(arr) / sizeof(arr[0]) and more
standard.
Signed-off-by: Guo Zhengkui
---
arch/
Am 22.02.22 um 15:11 schrieb Paolo Bonzini:
On 2/22/22 07:47, Nicholas Piggin wrote:
Patch 3 requires a KVM_CAP_PPC number allocated. QEMU maintainers are
happy with it (link in changelog) just waiting on KVM upstreaming. Do
you have objections to the series going to ppc/kvm tree first, or
an
Excerpts from Christian Borntraeger's message of February 23, 2022 7:14 pm:
>
>
> Am 22.02.22 um 15:11 schrieb Paolo Bonzini:
>> On 2/22/22 07:47, Nicholas Piggin wrote:
>>> Patch 3 requires a KVM_CAP_PPC number allocated. QEMU maintainers are
>>> happy with it (link in changelog) just waiting on
On Wed, Feb 23, 2022 at 9:42 AM Palmer Dabbelt wrote:
>
> On Tue, 01 Feb 2022 07:05:41 PST (-0800), guo...@kernel.org wrote:
> > From: Guo Ren
> >
> > Reconstruct __setup_additional_pages() by appending vdso info
> > pointer argument to meet compat_vdso_info requirement. And change
> > vm_special
In order to separate text and data, we need to setup
two rb trees.
This means that struct mod_tree_root is required even without
MODULES_TREE_LOOKUP.
Signed-off-by: Christophe Leroy
Reviewed-by: Aaron Tomlin
---
kernel/module/internal.h | 4 +++-
kernel/module/main.c | 5 -
2 files cha
book3s/32 and 8xx have a separate area for allocating modules,
defined by MODULES_VADDR / MODULES_END.
On book3s/32, it is not possible to protect against execution
on a page basis. A full 256M segment is either Exec or NoExec.
The module area is in an Exec segment while vmalloc area is
in a NoExe
In order to separate text and data, we need to setup
two rb trees.
Modify functions to give the tree as a parameter.
Signed-off-by: Christophe Leroy
---
kernel/module/internal.h| 4 ++--
kernel/module/main.c| 16
kernel/module/tree_lookup.c | 20 ++-
Replace module_addr_min and module_addr_max by
mod_tree.addr_min and mod_tree.addr_max
Signed-off-by: Christophe Leroy
---
kernel/module/main.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/kernel/module/main.c b/kernel/module/main.c
index cf236e964cf6..ce0ef17662c9 1
This series applies on top of my series "miscellanuous cleanups" v4.
This series allow architectures to request having modules data in
vmalloc area instead of module area.
This is required on powerpc book3s/32 in order to set data non
executable, because it is not possible to set executability o
In order to allow separation of data from text, add another layout,
called data_layout. For architectures requesting separation of text
and data, only text will go in core_layout and data will go in
data_layout.
For architectures which keep text and data together, make data_layout
an alias of core
Add CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC to allow architectures
to request having modules data in vmalloc area instead of module area.
This is required on powerpc book3s/32 in order to set data non
executable, because it is not possible to set executability on page
basis, this is done per 256
Le 27/06/2019 à 13:23, Naveen N. Rao a écrit :
Since ftrace_replace_code() is a __weak function and can be overridden,
we need to expose the flags that can be set. So, move the flags enum to
the header file.
Reviewed-by: Steven Rostedt (VMware)
Signed-off-by: Naveen N. Rao
This series doe
On Wed, Feb 23, 2022 at 8:19 PM Rolf Eike Beer wrote:
>
> > @@ -66,35 +68,35 @@ static int vdso_mremap(const struct vm_special_mapping
> > *sm, return 0;
> > }
> >
> > -static int __init __vdso_init(void)
> > +static int __init __vdso_init(struct __vdso_info *vdso_info)
> > {
> > unsigned
Building tinyconfig with gcc (Debian 11.2.0-16) and assembler (Debian
2.37.90.20220207) the following build error shows up:
{standard input}: Assembler messages:
{standard input}:10576: Error: unrecognized opcode: `stbcx.'
{standard input}:10680: Error: unrecognized opcode: `lharx'
{standard input
Looks like there been a copy paste mistake when added the instruction
'stbcx' twice and one was probably meant to be 'sthcx'.
Changing to 'sthcx' from 'stbcx'.
Cc: # v4.13+
Fixes: 350779a29f11 ("powerpc: Handle most loads and stores in instruction
emulation code")
Reported-by: Arnd Bergmann
Sig
Building tinyconfig with gcc (Debian 11.2.0-16) and assembler (Debian
2.37.90.20220207) the following build error shows up:
{standard input}: Assembler messages:
{standard input}:1190: Error: unrecognized opcode: `stbcix'
{standard input}:1433: Error: unrecognized opcode: `lwzcix'
{standard in
Le 10/01/2022 à 11:07, Naveen N. Rao a écrit :
> kernel test robot reported the below build error with a randconfig:
>powerpc64-linux-ld: arch/powerpc/net/bpf_jit_comp64.o:(.toc+0x0):
>undefined reference to `powerpc_security_features'
>
> This can happen if CONFIG_PPC_BARRIER_NOSPEC is
> On Thu, Feb 17, 2022 at 11:57:50AM +0100, Petr Vorel wrote:
> > CRYPTO_DEV_VMX_ENCRYPT is redundant with CRYPTO_DEV_VMX.
> > And it also forces CRYPTO_GHASH to be builtin even
> > CRYPTO_DEV_VMX_ENCRYPT was configured as module.
> Just because a tristate sits under a bool, it does not force
> t
vmx-crypto module depends on CRYPTO_AES, CRYPTO_CBC, CRYPTO_CTR or
CRYPTO_XTS, thus add them.
These dependencies are likely to be enabled, but if
CRYPTO_DEV_VMX=y && !CRYPTO_MANAGER_DISABLE_TESTS
and either of CRYPTO_AES, CRYPTO_CBC, CRYPTO_CTR or CRYPTO_XTS is built
as module or disabled, alg_tes
Hi!
On Wed, Feb 23, 2022 at 02:58:19PM +0100, Anders Roxell wrote:
> Building tinyconfig with gcc (Debian 11.2.0-16) and assembler (Debian
> 2.37.90.20220207) the following build error shows up:
>
> {standard input}: Assembler messages:
> {standard input}:1190: Error: unrecognized opcode: `stbc
On Wed, Feb 23, 2022 at 02:58:20PM +0100, Anders Roxell wrote:
> Building tinyconfig with gcc (Debian 11.2.0-16) and assembler (Debian
> 2.37.90.20220207) the following build error shows up:
>
> {standard input}: Assembler messages:
> {standard input}:10576: Error: unrecognized opcode: `stbcx.'
>
Update the guest state and timing entry/exit accounting to use the new
API, which was introduced following issues found[1]. KVM HV does not
seem to suffer from those issues listed, but it does call srcu inside
the guest context which is fragile at best. The new API allows guest
entry timing to be d
Commit a82adfd5c7cb ("hardening: Introduce CONFIG_ZERO_CALL_USED_REGS")
added zeroing of used registers at function exit.
At the time being, PPC64 clears volatile registers on syscall exit but
PPC32 doesn't do it for performance reason.
Add that clearing in PPC32 syscall exit as well, but only wh
Hi Kees,
Le 17/10/2021 à 19:19, Christophe Leroy a écrit :
> All EXEC tests are based on running a copy of do_nothing()
> except lkdtm_EXEC_RODATA which uses a different function
> called lkdtm_rodata_do_nothing().
>
> On architectures using function descriptors, EXEC tests are
> performed using
On Fri, Feb 18, 2022 at 10:06 AM Dan Williams wrote:
>
> On Thu, Feb 17, 2022 at 8:34 AM Kajol Jain wrote:
> >
> > Patchset adds performance stats reporting support for nvdimm.
> > Added interface includes support for pmu register/unregister
> > functions. A structure is added called nvdimm_pmu t
On Wed, Feb 23, 2022 at 06:11:36PM +0100, Christophe Leroy wrote:
> Commit a82adfd5c7cb ("hardening: Introduce CONFIG_ZERO_CALL_USED_REGS")
> added zeroing of used registers at function exit.
>
> At the time being, PPC64 clears volatile registers on syscall exit but
> PPC32 doesn't do it for perfo
On Mon, Feb 21, 2022 at 5:25 AM Thomas Bogendoerfer
wrote:
>
> With this patch
[ .. snip snip ..]
> I at least get my simple test cases fixed, but I'm not sure this is
> correct.
I think you really want to do that anyway, just to get things like
wild kernel pointers right (ie think get_kernel_nof
Le 23/02/2022 à 08:46, Christoph Hellwig a écrit :
Hi Christophe,
do you know what the state is in current linux-next?
I think we'll just want to queue up anything left at this point in the
dma-mapping or PCI tree and get it done.
Hi,
Patch 01, 04, 05, 06, 08, 09 have not reached -next yet.
On Wed, Feb 23, 2022 at 9:26 PM Christophe JAILLET
wrote:
>
> Le 23/02/2022 à 08:46, Christoph Hellwig a écrit :
> > Hi Christophe,
> >
> > do you know what the state is in current linux-next?
> >
> > I think we'll just want to queue up anything left at this point in the
> > dma-mapping or PCI tre
On Wed, Feb 23, 2022 at 06:11:36PM +0100, Christophe Leroy wrote:
> Commit a82adfd5c7cb ("hardening: Introduce CONFIG_ZERO_CALL_USED_REGS")
> added zeroing of used registers at function exit.
>
> At the time being, PPC64 clears volatile registers on syscall exit but
> PPC32 doesn't do it for perfo
On Wed, Feb 23, 2022 at 11:07 AM Dan Williams wrote:
>
> On Fri, Feb 18, 2022 at 10:06 AM Dan Williams
> wrote:
> >
> > On Thu, Feb 17, 2022 at 8:34 AM Kajol Jain wrote:
> > >
> > > Patchset adds performance stats reporting support for nvdimm.
> > > Added interface includes support for pmu regi
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