'--base' as documented in
https://git-scm.com/docs/git-format-patch]
url:
https://github.com/0day-ci/linux/commits/Nicholas-Piggin/KVM-PPC-Book3S-HV-P9-entry-exit-optimisations/20210726-115329
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds
The Linux kernel for powerpc since v3.10 has a bug which allows a malicious KVM
guest to
corrupt host memory.
In the handling of the H_RTAS hypercall, args.rets is made to point into the
args.args
buffer which is located on the stack:
args.rets = &args.args[be32_to_cpu(args.nargs)];
Ho
Since 5.13 QE's ucc nodes can't get interrupts from devicetree:
ucc@2000 {
cell-index = <1>;
reg = <0x2000 0x200>;
interrupts = <32>;
interrupt-parent = <&qeic>;
};
Now fw_devlink expects driver to create and probe a
On Sat, Jul 24, 2021 at 12:08:30AM +0200, Christian Lamparter wrote:
> On 23/07/2021 21:19, Andy Shevchenko wrote:
> > On Sun, Sep 06, 2020 at 12:06:10AM +0200, Christian Lamparter wrote:
> > > I've been holding on to these devices dts' for a while now.
> > > But ever since the recent purge of the
From: Xiongwei Song
Use _DEAR to get the offset of dear register in pr_regs for 64e cpus.
Signed-off-by: Xiongwei Song
---
arch/powerpc/kernel/asm-offsets.c| 13 +++--
arch/powerpc/kernel/exceptions-64e.S | 8
2 files changed, 7 insertions(+), 14 deletions(-)
diff --git
From: Xiongwei Song
Use _ESR to get the offset of esr register in pr_regs for 64e cpus.
Signed-off-by: Xiongwei Song
---
arch/powerpc/kernel/asm-offsets.c| 2 +-
arch/powerpc/kernel/exceptions-64e.S | 10 +-
2 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/arch/power
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.
Signed-off-by: Xiongwei Song
---
arch/powerpc/include/asm/ptrace.h | 5 ++
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.
Signed-off-by: Xiongwei Song
---
arch/powerpc/include/asm/ptrace.h |
commit 7c6986ade69e ("powerpc/stacktrace: Fix spurious "stale" traces in
raise_backtrace_ipi()")
introduces udelay() call without including the linux/delay.h header.
This may happen to work on master but the header that declares the
functionshould be included nonetheless.
Fixes: 7c6986ade69e ("po
In the numa=off kernel command-line configuration init_chip_info() loops
around the number of chips and attempts to copy the cpumask of that node
which is NULL for all iterations after the first chip.
Hence, store the cpu mask for each chip instead of derving cpumask from
node while populating the
On Mon, Jul 26, 2021 at 05:42:43PM +0200, Michal Suchanek wrote:
> commit 7c6986ade69e ("powerpc/stacktrace: Fix spurious "stale" traces in
> raise_backtrace_ipi()")
> introduces udelay() call without including the linux/delay.h header.
> This may happen to work on master but the header that decla
This series aims to stop contaminating the l2_hv structure with bits
that might have come from L1 state.
Patch 1 makes l2_hv read-only (mostly). It is now only changed when we
explicitly want to pass information to L1.
Patch 2 makes sure that L1 is not forwarded HFU interrupts when the
host has d
As one of the arguments of the H_ENTER_NESTED hypercall, the nested
hypervisor (L1) prepares a structure containing the values of various
hypervisor-privileged registers with which it wants the nested guest
(L2) to run. Since the nested HV runs in supervisor mode it needs the
host to write to these
If the nested hypervisor has no access to a facility because it has
been disabled by the host, it should also not be able to see the
Hypervisor Facility Unavailable that arises from one of its guests
trying to access the facility.
This patch turns a HFU that happened in L2 into a Hypervisor Emulat
> -Original Message-
> From: Maxim Kochetkov
> Sent: Monday, July 26, 2021 12:22 AM
> To: linuxppc-dev@lists.ozlabs.org
> Cc: linux-arm-ker...@lists.infradead.org; linux-ker...@vger.kernel.org;
> sarava...@google.com; Leo Li ; Qiang Zhao
> ; gre...@linuxfoundation.org; Maxim Kochetkov
>
Michael Ellerman writes:
> The Linux kernel for powerpc since v3.10 has a bug which allows a malicious
> KVM guest to
> corrupt host memory.
>
> In the handling of the H_RTAS hypercall, args.rets is made to point into the
> args.args
> buffer which is located on the stack:
>
> args.rets =
Excerpts from Fabiano Rosas's message of July 27, 2021 6:17 am:
> If the nested hypervisor has no access to a facility because it has
> been disabled by the host, it should also not be able to see the
> Hypervisor Facility Unavailable that arises from one of its guests
> trying to access the facili
David Gibson writes:
> On Thu, Jul 22, 2021 at 12:37:46PM +0530, Aneesh Kumar K.V wrote:
>> David Gibson writes:
>>
>> > On Mon, Jun 28, 2021 at 08:41:15PM +0530, Aneesh Kumar K.V wrote:
>
>> >
>> >> + nid = of_read_number(&aa.arrays[index], 1);
>> >> +
>> >> + if (nid =
The 'papr_scm' module and 'papr' implementation in libndctl supports
PDSMs for reporting PAPR NVDIMM health, its dirty-shutdown-count and
injecting smart-error. This patch adds support for those PDSMs in
ndtest module so that PDSM specific paths in libndctl can be exercised.
Signed-off-by: Shivapr
On Tue, Jul 27, 2021 at 09:02:33AM +0530, Aneesh Kumar K.V wrote:
> David Gibson writes:
>
> > On Thu, Jul 22, 2021 at 12:37:46PM +0530, Aneesh Kumar K.V wrote:
> >> David Gibson writes:
> >>
> >> > On Mon, Jun 28, 2021 at 08:41:15PM +0530, Aneesh Kumar K.V wrote:
>
>
>
> >
> >> >
> >>
Hi all,
this series switches the core block layer code and all users of the
existing bvec kmap helpers to use kmap_local_page. Drivers that
currently use open coded kmap_atomic calls will converted in a follow
on series.
To do so a new kunmap variant is added that calls
flush_kernel_dcache_page.
There is no need to include genhd.h from a random arch header, and not
doing so prevents the possibility for nasty include loops.
Signed-off-by: Christoph Hellwig
Reviewed-by: Chaitanya Kulkarni
Reviewed-by: Martin K. Petersen
Reviewed-by: Ira Weiny
---
arch/mips/include/asm/mach-rc32434/rb.h
Fix the include guards to match the file naming.
Signed-off-by: Christoph Hellwig
Reviewed-by: Bart Van Assche
Reviewed-by: Chaitanya Kulkarni
Reviewed-by: Martin K. Petersen
Reviewed-by: Ira Weiny
---
include/linux/bvec.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --g
Add a helper to call kmap_local_page on a bvec. There is no need for
an unmap helper given that kunmap_local accept any address in the mapped
page.
Signed-off-by: Christoph Hellwig
Reviewed-by: Chaitanya Kulkarni
Reviewed-by: Martin K. Petersen
Reviewed-by: Ira Weiny
---
include/linux/bvec.h
Add helpers to perform common memory operation on a bvec.
Signed-off-by: Christoph Hellwig
Reviewed-by: Chaitanya Kulkarni
Reviewed-by: Martin K. Petersen
Reviewed-by: Ira Weiny
---
include/linux/bvec.h | 33 +
1 file changed, 33 insertions(+)
diff --git a/inc
Use memzero_bvec to zero each segment in the bio instead of manually
mapping and zeroing the data.
Signed-off-by: Christoph Hellwig
Reviewed-by: Chaitanya Kulkarni
Reviewed-by: Martin K. Petersen
Reviewed-by: Ira Weiny
---
block/bio.c | 9 ++---
1 file changed, 2 insertions(+), 7 deletion
Use memzero_bvec instead of reimplementing it.
Signed-off-by: Christoph Hellwig
Acked-by: Ilya Dryomov
Reviewed-by: Martin K. Petersen
Reviewed-by: Ira Weiny
---
drivers/block/rbd.c | 15 ++-
1 file changed, 2 insertions(+), 13 deletions(-)
diff --git a/drivers/block/rbd.c b/driv
There is no need to disable interrupts in bio_copy_block, and the local
only mappings helps to avoid any sort of problems with stray writes
into the bio data.
Signed-off-by: Christoph Hellwig
Reviewed-by: Martin K. Petersen
Reviewed-by: Ira Weiny
---
drivers/md/dm-writecache.c | 5 ++---
1 fil
Use the bvec helpers instead of open coding the copy.
Signed-off-by: Christoph Hellwig
Reviewed-by: Martin K. Petersen
Tested-by: Geoff Levand
---
drivers/block/ps3disk.c | 18 ++
1 file changed, 2 insertions(+), 16 deletions(-)
diff --git a/drivers/block/ps3disk.c b/drivers/b
These two helpers are entirely unused now.
Signed-off-by: Christoph Hellwig
Reviewed-by: Martin K. Petersen
---
include/linux/bio.h | 42 --
1 file changed, 42 deletions(-)
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 2203b686e1f0..7b5f65
On Mon, Jul 26, 2021 at 10:37:57PM +0530, Pratik R. Sampat wrote:
> In the numa=off kernel command-line configuration init_chip_info() loops
> around the number of chips and attempts to copy the cpumask of that node
> which is NULL for all iterations after the first chip.
>
> Hence, store the cpu
Use the proper helpers instead of open coding the copy.
Signed-off-by: Christoph Hellwig
Reviewed-by: Martin K. Petersen
---
block/bio.c | 28
1 file changed, 8 insertions(+), 20 deletions(-)
diff --git a/block/bio.c b/block/bio.c
index 2e436bccb1e2..0c89fa2f7a85 1
Use memcpy_to_bvec instead of opencoding the logic.
Signed-off-by: Christoph Hellwig
Reviewed-by: Martin K. Petersen
---
block/bounce.c | 20 ++--
1 file changed, 2 insertions(+), 18 deletions(-)
diff --git a/block/bounce.c b/block/bounce.c
index 94081e013c58..7e9e666c04dc 1006
Use memcpy_from_bvec instead of open coding the logic.
Signed-off-by: Christoph Hellwig
Reviewed-by: Martin K. Petersen
---
block/blk-map.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/blk-map.c b/block/blk-map.c
index 3743158ddaeb..d1448aaad980 100644
--- a/block/b
Rewrite the actual bounce buffering loop in __blk_queue_bounce to that
the memcpy_to_bvec helper can be used to perform the data copies.
Signed-off-by: Christoph Hellwig
Reviewed-by: Martin K. Petersen
---
block/bounce.c | 19 +++
1 file changed, 7 insertions(+), 12 deletions(-)
Using local kmaps slightly reduces the chances to stray writes, and
the bvec interface cleans up the code a little bit.
Signed-off-by: Christoph Hellwig
Reviewed-by: Martin K. Petersen
---
block/t10-pi.c | 16 ++--
1 file changed, 6 insertions(+), 10 deletions(-)
diff --git a/block
Using local kmaps slightly reduces the chances to stray writes, and
the bvec interface cleans up the code a little bit.
Signed-off-by: Christoph Hellwig
Reviewed-by: Martin K. Petersen
---
block/bio-integrity.c | 14 ++
1 file changed, 6 insertions(+), 8 deletions(-)
diff --git a/b
On 27/07/21 11:46 am, Gautham R Shenoy wrote:
On Mon, Jul 26, 2021 at 10:37:57PM +0530, Pratik R. Sampat wrote:
In the numa=off kernel command-line configuration init_chip_info() loops
around the number of chips and attempts to copy the cpumask of that node
which is NULL for all iterations af
In bpf_jit_build_body(), the mapping of TMP_REG_1 and TMP_REG_2's bpf
register to ppc register is evalulated at every use despite not
changing. Instead, determine the ppc register once and store the result.
This will be more useful when a later patch introduces a more complex
mapping from bpf regis
Prepare for doing commit 40272035e1d0 ("powerpc/bpf: Reallocate BPF
registers to volatile registers when possible on PPC32") on PPC64 in a
later patch. Instead of directly accessing the const b2p[] array for
mapping bpf to ppc registers use bpf_to_ppc() which allows per struct
codegen_context mappi
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 order to avoid
having to save them/restore on the s
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