Allow to pass a remap argument to the swiotlb initialization functions
to handle the Xen/x86 remap case. ARM/ARM64 never did any remapping
from xen_swiotlb_fixup, so we don't even need that quirk.
Signed-off-by: Christoph Hellwig
---
arch/arm/xen/mm.c | 23 +++---
arch/x86/includ
gets pulled in by all drivers using the DMA API.
Remove x86 internal variables and unnecessary includes from it.
Signed-off-by: Christoph Hellwig
---
arch/x86/include/asm/dma-mapping.h | 11 ---
arch/x86/include/asm/iommu.h | 2 ++
2 files changed, 2 insertions(+), 11 deletions(-
Pass a bool to pass if swiotlb needs to be enabled based on the
addressing needs and replace the verbose argument with a set of
flags, including one to force enable bounce buffering.
Note that this patch removes the possibility to force xen-swiotlb
use using swiotlb=force on the command line on x8
On Mon, Feb 21, 2022 at 03:31:23PM +0100, Arnd Bergmann wrote:
> I'll update it this way, otherwise I'd need help in form of a patch
> that changes the exception handling so __get_user/__put_user
> also return -EFAULT for an address error.
https://lore.kernel.org/all/20220222155345.138861-1-tsbog.
On Tue 2022-02-22 16:00 +0100, Christophe Leroy wrote:
> 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
> ---
> kernel/module/internal.h | 4 +++-
>
When CONFIG_PPC64 is set and CONFIG_ALTIVEC is not the following build
failures occur:
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/dc_fpu.c: In function
'dc_fpu_begin':
>> drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/dc_fpu.c:61:17: error:
>> implicit declaration of function 'enable_ke
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 inherited most of the structs
from the generic one.
Signed-off-by: Guo Ren
Signed-off
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_mapping *dm, *cm initialization into static.
Signed-off-by: Guo Ren
Signe
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 with rv32 defconfig.
Signed-off-by: Guo Ren
Signed-off-by: Guo Ren
Cc: A
On Tue, 01 Feb 2022 07:05:36 PST (-0800), guo...@kernel.org wrote:
From: Guo Ren
Implement the entry of compat_sys_call_table[] in asm. Ref to
riscv-privileged spec 4.1.1 Supervisor Status Register (sstatus):
BIT[32:33] = UXL[1:0]:
- 1:32
- 2:64
- 3:128
Signed-off-by: Guo Ren
Signed-off-
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
architectures need change compiler or -m (machine parameter) to
support vdso32 compi
On Tue, 01 Feb 2022 07:05:42 PST (-0800), guo...@kernel.org wrote:
From: Guo Ren
Implement compat_setup_rt_frame for sigcontext save & restore. The
main process is the same with signal, but the rv32 pt_regs' size
is different from rv64's, so we needs convert them.
It's kind of ugly to have tw
On Tue, 01 Feb 2022 07:05:43 PST (-0800), guo...@kernel.org wrote:
From: Guo Ren
Now, you can use native gdb on riscv64 for rv32 app debugging.
$ uname -a
Linux buildroot 5.16.0-rc4-00036-gbef6b82fdf23-dirty #53 SMP Mon Dec 20
23:06:53 CST 2021 riscv64 GNU/Linux
$ cat /proc/cpuinfo
processor
On Tue, 01 Feb 2022 07:05:45 PST (-0800), guo...@kernel.org wrote:
From: Guo Ren
Current riscv doesn't support the 32bit KVM API. Let's make it
clear by not selecting KVM_COMPAT.
Signed-off-by: Guo Ren
Signed-off-by: Guo Ren
Cc: Arnd Bergmann
Cc: Anup Patel
---
virt/kvm/Kconfig | 2 +-
1
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
history issues and can't use standard linux unistd.h. RISC-V would
be first standa
Paul reported a warning with DEBUG_ATOMIC_SLEEP=y:
BUG: sleeping function called from invalid context at
include/linux/sched/mm.h:256
in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 1, name: swapper/0
preempt_count: 0, expected: 0
...
Call Trace:
dump_stack_lvl+0xa0/0xec (unr
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
the options
On Thu, Feb 17, 2022 at 11:57:51AM +0100, Petr Vorel wrote:
> 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, CRYP
From: Zi Yan
Enable set_migratetype_isolate() to check specified sub-range for
unmovable pages during isolation. Page isolation is done
at max(MAX_ORDER_NR_PAEGS, pageblock_nr_pages) granularity, but not all
pages within that granularity are intended to be isolated. For example,
alloc_contig_rang
From: Zi Yan
Hi all,
This patchset tries to remove the MAX_ORDER-1 alignment requirement for CMA
and alloc_contig_range(). It prepares for my upcoming changes to make
MAX_ORDER adjustable at boot time[1]. It is on top of mmotm-2022-02-14-17-46.
Changelog
===
V6
---
1. Resolved compilation error
From: Zi Yan
Now alloc_contig_range() works at pageblock granularity. Change CMA
allocation, which uses alloc_contig_range(), to use pageblock_order
alignment.
Signed-off-by: Zi Yan
---
include/linux/cma.h| 4 ++--
include/linux/mmzone.h | 5 +
mm/page_alloc.c| 4 ++--
3 files
From: Zi Yan
has_unmovable_pages() is only used in mm/page_isolation.c. Move it from
mm/page_alloc.c and make it static.
Signed-off-by: Zi Yan
Reviewed-by: Oscar Salvador
Reviewed-by: Mike Rapoport
---
include/linux/page-isolation.h | 2 -
mm/page_alloc.c| 119 -
From: Zi Yan
alloc_contig_range() worked at MAX_ORDER-1 granularity to avoid merging
pageblocks with different migratetypes. It might unnecessarily convert
extra pageblocks at the beginning and at the end of the range. Change
alloc_contig_range() to work at pageblock granularity.
Special handlin
From: Zi Yan
alloc_contig_range() now only needs to be aligned to pageblock_order,
drop virtio_mem size requirement that it needs to be the max of
pageblock_order and MAX_ORDER.
Signed-off-by: Zi Yan
---
drivers/virtio/virtio_mem.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
d
Excerpts from Paolo Bonzini's message of February 23, 2022 12:11 am:
> 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 goin
Excerpts from Michael Ellerman's message of February 22, 2022 9:34 pm:
> Since commit 46ddcb3950a2 ("powerpc/mm: Show if a bad page fault on data
> is read or write.") we use page_fault_is_write(regs->dsisr) in
> __bad_page_fault() to determine if the fault is for a read or write, and
> change the
Excerpts from Haren Myneni's message of February 20, 2022 5:55 am:
>
> The kernel sets the VAS window with PID when it is opened in
> the hypervisor. During DLPAR operation, windows can be closed and
> reopened in the hypervisor when the credit is available. So saves
> this PID in pseries_vas_wind
Excerpts from Haren Myneni's message of February 20, 2022 5:55 am:
>
> The user space opens VAS windows and issues NX requests by pasting
> CRB on the corresponding paste address mmap. When the system lost
> credits due to core removal, the kernel has to close the window in
> the hypervisor and ma
Excerpts from Haren Myneni's message of February 20, 2022 5:58 am:
>
> The VAS window may not be active if the system looses credits and
> the NX generates page fault when it receives request on unmap
> paste address.
>
> The kernel handles the fault by remap new paste address if the
> window is
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 mmap(), the paste instruction returns
I don't think the changelog
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 cores are removed, and may
> allocate more when cores are added.
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. If these credits are
> available later for core add, reopen thes
Excerpts from Haren Myneni's message of February 20, 2022 6:01 am:
>
> The hypervisor provides the available VAS GZIP capabilities such
> as default or QoS window type and the target available credits in
> each type. This patch creates sysfs entries and exports the target,
> used and the available
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 of QoS credits and sets this value with HMC
> interface. With the
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.h
> +++ b/arch/mips/include/asm/uaccess.h
> @@ -19,6 +19,7 @@
> #ifdef CON
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.
On Wed, 2022-02-23 at 17:05 +1000, Nicholas Piggin wrote:
> Excerpts from Haren Myneni's message of February 20, 2022 5:58 am:
> > The VAS window may not be active if the system looses credits and
> > the NX generates page fault when it receives request on unmap
> > paste address.
> >
> > The kern
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
This series applies on top of Aaron's series "module: core code clean up" v6,
plus the 4 fixups I just sent:
- Fixup for 54f2273e5fef ("module: Move kallsyms support into a separate file")
- Fixup for e5973a14d187 ("module: Move strict rwx support to a separate file")
- Fixup for 1df95c1b9fb2 ("mo
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
---
kernel/module/internal.h | 4 +++-
kernel/module/main.c | 5 -
2 files changed, 3 insertions(+), 6 de
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
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 f4d95a2ff08f..db503a212532 1
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 ++-
Since commit 46ddcb3950a2 ("powerpc/mm: Show if a bad page fault on data
is read or write.") we use page_fault_is_write(regs->dsisr) in
__bad_page_fault() to determine if the fault is for a read or write, and
change the message printed accordingly.
But SLB faults, aka Data Segment Interrupts, don'
Following commit 12318163737c ("powerpc/32: Remove remaining .stabs
annotations"), stabs code are not used anymore.
Remove them.
Signed-off-by: Christophe Leroy
---
arch/powerpc/include/asm/ppc_asm.h | 6 --
1 file changed, 6 deletions(-)
diff --git a/arch/powerpc/include/asm/ppc_asm.h
b/
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
another option is you could take patch 3 alone fir
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 in
Le 02/06/2020 à 07:27, Jordan Niethe a écrit :
Currently prefixed instructions are treated as two word instructions by
show_user_instructions(), treat them as a single instruction. '<' and
'>' are placed around the instruction at the NIP, and for prefixed
instructions this is placed around the
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
---
kernel/module/internal.h | 4 +++-
kernel/module/main.c | 5 -
2 files changed, 3 insertions(+), 6 de
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
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 f4d95a2ff08f..db503a212532 1
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
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 ++-
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
This series applies on top of Aaron's series "module: core code clean up" v8.
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 execut
Resending as I accidentaly sent my response to the list only.
Le 21/02/2022 à 03:03, cgel@gmail.com a écrit :
> From: Minghao Chi (CGEL ZTE)
>
> Use of_device_get_match_data() to simplify the code.
>
> Reported-by: Zeal Robot
> Signed-off-by: Minghao Chi (CGEL ZTE)
> ---
> arch/powerpc/
Use the more specific is_swiotlb_active check instead of checking the
global swiotlb_force variable.
Signed-off-by: Christoph Hellwig
---
kernel/dma/direct.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/dma/direct.h b/kernel/dma/direct.h
index 4632b0f4f72eb..4dc16e0
Hi all,
this series tries to clean up the swiotlb initialization, including
that of swiotlb-xen. To get there is also removes the x86 iommu table
infrastructure that massively obsfucates the initialization path.
Git tree:
git://git.infradead.org/users/hch/misc.git swiotlb-init-cleanup
Gitw
If force bouncing is enabled we can't release the bufffers.
Signed-off-by: Christoph Hellwig
---
kernel/dma/swiotlb.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index f1e7ea160b433..36fbf1181d285 100644
--- a/kernel/dma/swiotlb.c
+++ b/kern
swiotlb_late_init_with_default_size is an overly verbose name that
doesn't even catch what the function is doing, given that the size is
not just a default but the actual requested size.
Rename it to swiotlb_init_late.
Signed-off-by: Christoph Hellwig
---
arch/x86/pci/sta2x11-fixup.c | 2 +-
in
Let the caller chose a zone to allocate from.
Signed-off-by: Christoph Hellwig
---
arch/x86/pci/sta2x11-fixup.c | 2 +-
include/linux/swiotlb.h | 2 +-
kernel/dma/swiotlb.c | 4 ++--
3 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/x86/pci/sta2x11-fixup.c b/arch/x
Remove the bogus Xen override that was usually larger than the actual
size and just calculate the value on demand. Note that
swiotlb_max_segment still doesn't make sense as an interface and should
eventually be removed.
Signed-off-by: Christoph Hellwig
---
drivers/xen/swiotlb-xen.c | 2 --
inc
Use the generic swiotlb initialization helper instead of open coding it.
Signed-off-by: Christoph Hellwig
---
arch/mips/cavium-octeon/dma-octeon.c | 15 ++-
arch/mips/pci/pci-octeon.c | 2 +-
2 files changed, 3 insertions(+), 14 deletions(-)
diff --git a/arch/mips/cavium-
The IOMMU table tries to separate the different IOMMUs into different
backends, but actually requires various cross calls.
Rewrite the code to do the generic swiotlb/swiotlb-xen setup directly
in pci-dma.c and then just call into the IOMMU drivers.
Signed-off-by: Christoph Hellwig
---
arch/ia64
Power SVM wants to allocate a swiotlb buffer that is not restricted to
low memory for the trusted hypervisor scheme. Consolidate the support
for this into the swiotlb_init interface by adding a new flag.
Signed-off-by: Christoph Hellwig
---
arch/powerpc/include/asm/svm.h | 4
arch/p
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