* Re: [PATCH] powerpc/syscalls: Simplify do_mmap2()
From: Michael Ellerman @ 2021-08-27 13:16 UTC (permalink / raw)
To: Michael Ellerman, Christophe Leroy, Paul Mackerras,
Benjamin Herrenschmidt
Cc: linuxppc-dev, linux-kernel
In-Reply-To: <373ec500f386374bc5735007df3d3869eac47be1.1624618701.git.christophe.leroy@csgroup.eu>
On Fri, 25 Jun 2021 10:58:33 +0000 (UTC), Christophe Leroy wrote:
> When shift is nul, operations remain valid so no test needed.
>
> And 'ret' is unnecessary.
>
> And use IS_ALIGNED() to check alignment, that's more clear.
>
>
> [...]
Applied to powerpc/next.
[1/1] powerpc/syscalls: Simplify do_mmap2()
https://git.kernel.org/powerpc/c/316389e904f968d24d44cd96a6d171ee1ef269cf
cheers
^ permalink raw reply
* Re: [PATCH v1 1/2] powerpc: Use lwarx/ldarx directly instead of PPC_LWARX/LDARX macros
From: Michael Ellerman @ 2021-08-27 13:16 UTC (permalink / raw)
To: Michael Ellerman, Christophe Leroy, Paul Mackerras,
Benjamin Herrenschmidt
Cc: linuxppc-dev, linux-kernel
In-Reply-To: <1fc81f07cabebb875b963e295408cc3dd38c8d85.1614674882.git.christophe.leroy@csgroup.eu>
On Tue, 2 Mar 2021 08:48:11 +0000 (UTC), Christophe Leroy wrote:
> Force the eh flag at 0 on PPC32.
>
Patch 1 applied to powerpc/next.
[1/2] powerpc: Use lwarx/ldarx directly instead of PPC_LWARX/LDARX macros
https://git.kernel.org/powerpc/c/9401f4e46cf6965e23738f70e149172344a01eef
cheers
^ permalink raw reply
* Re: [PATCH v2] powerpc: Avoid link stack corruption in misc asm functions
From: Michael Ellerman @ 2021-08-27 13:15 UTC (permalink / raw)
To: Michael Ellerman, Christophe Leroy, Paul Mackerras,
Benjamin Herrenschmidt
Cc: linuxppc-dev, linux-kernel
In-Reply-To: <c6eabb4fb6c156f75d56dcbcc6f243e5ac0fba42.1629791763.git.christophe.leroy@csgroup.eu>
On Tue, 24 Aug 2021 07:56:35 +0000 (UTC), Christophe Leroy wrote:
> bl;mflr is used at several places to get code position.
>
> Use bcl 20,31,+4 instead of bl in order to preserve link stack.
>
> See commit c974809a26a1 ("powerpc/vdso: Avoid link stack corruption
> in __get_datapage()") for details.
>
> [...]
Applied to powerpc/next.
[1/1] powerpc: Avoid link stack corruption in misc asm functions
https://git.kernel.org/powerpc/c/33e1402435cb9f3021439a15935ea2dc69ec1844
cheers
^ permalink raw reply
* Re: (subset) [PATCH v3 1/3] powerpc: Remove MSR_PR check in interrupt_exit_{user/kernel}_prepare()
From: Michael Ellerman @ 2021-08-27 13:16 UTC (permalink / raw)
To: Christophe Leroy, Paul Mackerras, Benjamin Herrenschmidt,
Michael Ellerman, npiggin
Cc: linuxppc-dev, linux-kernel
In-Reply-To: <385ead49ccb66a259b25fee3eebf0bd4094068f3.1629707037.git.christophe.leroy@csgroup.eu>
On Mon, 23 Aug 2021 08:24:20 +0000 (UTC), Christophe Leroy wrote:
> In those hot functions that are called at every interrupt, any saved
> cycle is worth it.
>
> interrupt_exit_user_prepare() and interrupt_exit_kernel_prepare() are
> called from three places:
> - From entry_32.S
> - From interrupt_64.S
> - From interrupt_exit_user_restart() and interrupt_exit_kernel_restart()
>
> [...]
Applied to powerpc/next.
[2/3] powerpc: Refactor verification of MSR_RI
https://git.kernel.org/powerpc/c/806c0e6e7e97adc17389c8dc1f52d4736f49299b
cheers
^ permalink raw reply
* Re: [PATCH v3] powerpc/booke: Avoid link stack corruption in several places
From: Michael Ellerman @ 2021-08-27 13:15 UTC (permalink / raw)
To: Michael Ellerman, Christophe Leroy, Paul Mackerras,
Benjamin Herrenschmidt
Cc: linuxppc-dev, linux-kernel
In-Reply-To: <e9fbc285eceb720e6c0e032ef47fe8b05f669b48.1629791751.git.christophe.leroy@csgroup.eu>
On Tue, 24 Aug 2021 07:56:26 +0000 (UTC), Christophe Leroy wrote:
> Use bcl 20,31,+4 instead of bl in order to preserve link stack.
>
> See commit c974809a26a1 ("powerpc/vdso: Avoid link stack corruption
> in __get_datapage()") for details.
>
>
>
> [...]
Applied to powerpc/next.
[1/1] powerpc/booke: Avoid link stack corruption in several places
https://git.kernel.org/powerpc/c/f5007dbf4da729baa850b33a64dc3cc53757bdf8
cheers
^ permalink raw reply
* Re: [PATCH v4 1/4] powerpc/ptdump: Use DEFINE_SHOW_ATTRIBUTE()
From: Michael Ellerman @ 2021-08-27 13:16 UTC (permalink / raw)
To: Michael Ellerman, Christophe Leroy, Paul Mackerras,
Benjamin Herrenschmidt
Cc: linuxppc-dev, linux-kernel
In-Reply-To: <b864a92693ca8413ef0b19f0c12065c212899b6e.1625762905.git.christophe.leroy@csgroup.eu>
On Thu, 8 Jul 2021 16:49:40 +0000 (UTC), Christophe Leroy wrote:
> Use DEFINE_SHOW_ATTRIBUTE() instead of open coding
> open() and fops.
>
>
>
>
Applied to powerpc/next.
[1/4] powerpc/ptdump: Use DEFINE_SHOW_ATTRIBUTE()
https://git.kernel.org/powerpc/c/11f27a7fa4ca27935de74e3eb052bdc430d5f8d8
[2/4] powerpc/ptdump: Remove unused 'page_size' parameter
https://git.kernel.org/powerpc/c/64b87b0c70e0fd28352895cba3c0a9631e0072dd
[3/4] powerpc/ptdump: Reduce level numbers by 1 in note_page() and add p4d level
https://git.kernel.org/powerpc/c/cf98d2b6eea6a1b2c43f85680ad58fcc3ea9496b
[4/4] powerpc/ptdump: Convert powerpc to GENERIC_PTDUMP
https://git.kernel.org/powerpc/c/e084728393a58e7fdafeee2e6b20e0faff09b557
cheers
^ permalink raw reply
* Re: [PATCH 0/6] W=1 fixes
From: Michael Ellerman @ 2021-08-27 13:15 UTC (permalink / raw)
To: linuxppc-dev, Cédric Le Goater; +Cc: Christophe Leroy
In-Reply-To: <20210819125656.14498-1-clg@kaod.org>
On Thu, 19 Aug 2021 14:56:50 +0200, Cédric Le Goater wrote:
> With this small series, I could compile the ppc kernel with W=1. There
> are certainly other configs which will need more fixes but it's a good
> start.
>
> The last 2 patches look hacky. Christophe, could you help with these
> to find a better place to include the declarations ?
>
> [...]
Patches 2-4 applied to powerpc/next.
[2/6] powerpc/pseries/vas: Declare pseries_vas_fault_thread_fn() as static
https://git.kernel.org/powerpc/c/4cb266074aa17e9cafed3a92e9f43b161516569f
[3/6] KVM: PPC: Book3S PR: Declare kvmppc_handle_exit_pr()
https://git.kernel.org/powerpc/c/cb53a93e33e108bfec00a13cd12696e1c0ccc8b6
[4/6] KVM: PPC: Book3S PR: Remove unused variable
https://git.kernel.org/powerpc/c/b352ddae7b2ccd2cb29f495ca0a7c9b6848b623f
cheers
^ permalink raw reply
* Re: [PATCH v2 0/2] W=1 fixes
From: Michael Ellerman @ 2021-08-27 13:15 UTC (permalink / raw)
To: linuxppc-dev, Cédric Le Goater
In-Reply-To: <20210823090039.166120-1-clg@kaod.org>
On Mon, 23 Aug 2021 11:00:37 +0200, Cédric Le Goater wrote:
> These are the remaining patches needed to compile the ppc kernel with
> W=1. Audit issues are now being addressed by Christophe in patch :
>
> [v2] powerpc/audit: Convert powerpc to AUDIT_ARCH_COMPAT_GENERIC
> http://patchwork.ozlabs.org/project/linuxppc-dev/patch/dc14509a28a993738b1325211f412be72a4f9b1e.1629701132.git.christophe.leroy@csgroup.eu/
>
> Thanks,
>
> [...]
Applied to powerpc/next.
[1/2] powerpc/prom: Fix unused variable ‘reserve_map’ when CONFIG_PPC32 is not set
https://git.kernel.org/powerpc/c/3accc0faef081b6813967b34f7d05a3edb855cbd
[2/2] powerpc/compat_sys: Declare syscalls
https://git.kernel.org/powerpc/c/cc47ad409ba9cc950e9c492c8ba653dabd392148
cheers
^ permalink raw reply
* Re: [PATCH v2 0/3] KVM: PPC: Book3S HV: kvmhv_copy_tofrom_guest_radix changes
From: Michael Ellerman @ 2021-08-27 13:15 UTC (permalink / raw)
To: Fabiano Rosas, kvm-ppc; +Cc: christophe.leroy, linuxppc-dev, npiggin
In-Reply-To: <20210805212616.2641017-1-farosas@linux.ibm.com>
On Thu, 5 Aug 2021 18:26:13 -0300, Fabiano Rosas wrote:
> 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 already enforces that the effective address must
> be on quadrant 0, moving the checks from the high level
> function would only add overhead to the hcall path, so I
> opted for a lightweight check at the low level.
>
> [...]
Applied to powerpc/next.
[1/3] KVM: PPC: Book3S HV: Fix copy_tofrom_guest routines
https://git.kernel.org/powerpc/c/5d7d6dac8fe99ed59eee2300e4a03370f94d5222
[2/3] KVM: PPC: Book3S HV: Add sanity check to copy_tofrom_guest
https://git.kernel.org/powerpc/c/c232461c0c3b0aca637f0d7658a7f5d0bb393a4e
[3/3] KVM: PPC: Book3S HV: Stop exporting symbols from book3s_64_mmu_radix
https://git.kernel.org/powerpc/c/0eb596f1e6103ebe122792a425b88c5dc21c4087
cheers
^ permalink raw reply
* Re: [PATCH] powerpc/tau: Add 'static' storage qualifier to 'tau_work' definition
From: Michael Ellerman @ 2021-08-27 13:15 UTC (permalink / raw)
To: Michael Ellerman, Paul Mackerras, Finn Thain,
Benjamin Herrenschmidt
Cc: linuxppc-dev, linux-kernel
In-Reply-To: <44ab381741916a51e783c4a50d0b186abdd8f280.1629334014.git.fthain@linux-m68k.org>
On Thu, 19 Aug 2021 10:46:54 +1000, Finn Thain wrote:
> This patch prevents the following sparse warning.
>
> arch/powerpc/kernel/tau_6xx.c:199:1: sparse: sparse: symbol 'tau_work'
> was not declared. Should it be static?
>
>
>
> [...]
Applied to powerpc/next.
[1/1] powerpc/tau: Add 'static' storage qualifier to 'tau_work' definition
https://git.kernel.org/powerpc/c/6cd717fe9b3a787f8e8f9d0bc9b7634a9c104b3e
cheers
^ permalink raw reply
* Re: [PATCH v2 1/2] selftests/powerpc: Add missing clobbered register to to ptrace TM tests
From: Michael Ellerman @ 2021-08-27 13:16 UTC (permalink / raw)
To: linuxppc-dev, Jordan Niethe; +Cc: mikey
In-Reply-To: <20210729041317.366612-1-jniethe5@gmail.com>
On Thu, 29 Jul 2021 14:13:16 +1000, Jordan Niethe wrote:
> ISA v3.1 removes TM but includes a synthetic implementation for
> backwards compatibility. With this implementation, the tests
> ptrace-tm-spd-gpr and ptrace-tm-gpr should never be able to make any
> forward progress and eventually should be killed by the timeout.
> Instead on a P10 running in P9 mode, ptrace_tm_gpr fails like so:
>
> test: ptrace_tm_gpr
> tags: git_version:unknown
> Starting the child
> ...
> ...
> GPR[27]: 1 Expected: 2
> GPR[28]: 1 Expected: 2
> GPR[29]: 1 Expected: 2
> GPR[30]: 1 Expected: 2
> GPR[31]: 1 Expected: 2
> [FAIL] Test FAILED on line 98
> failure: ptrace_tm_gpr
> selftests: ptrace-tm-gpr [FAIL]
>
> [...]
Applied to powerpc/next.
[1/2] selftests/powerpc: Add missing clobbered register to to ptrace TM tests
https://git.kernel.org/powerpc/c/c95278a0534449efc64ac8169382bce217963be2
[2/2] selftests: Skip TM tests on synthetic TM implementations
https://git.kernel.org/powerpc/c/e42edf9b9d126bb1c743f2e7984877ba27f09fe7
cheers
^ permalink raw reply
* Re: [PATCH v2 0/3] powerpc: mpc855_ads defconfig fixes
From: Michael Ellerman @ 2021-08-27 13:15 UTC (permalink / raw)
To: linuxppc-dev, Michael Ellerman, Joel Stanley, Christophe Leroy
In-Reply-To: <20210817045407.2445664-1-joel@jms.id.au>
On Tue, 17 Aug 2021 14:24:04 +0930, Joel Stanley wrote:
> v2: fix typos, split out mtd fix from savedefconfig patch
>
> The first patch fixes a build warning I noticed when testing something
> unrelated.
>
> The second fixes a regression where the MTD partition support dropped out
> of the config. I have enabled the dependency so this is still part of
> the config.
>
> [...]
Applied to powerpc/next.
[1/3] powerpc/config: Fix IPV6 warning in mpc855_ads
https://git.kernel.org/powerpc/c/c5ac55b6cbc604ad4144c380feae20f69453df91
[2/3] powerpc/config: Renable MTD_PHYSMAP_OF
https://git.kernel.org/powerpc/c/d0e28a6145c3455b69991245e7f6147eb914b34a
[3/3] powerpc/configs: Regenerate mpc885_ads_defconfig
https://git.kernel.org/powerpc/c/87e0d46bf68913f4c87dba94aadc00da658a874b
cheers
^ permalink raw reply
* Re: [PATCH] powerpc/perf/hv-gpci: Fix the logic to compute counter value from the hcall result buffer.
From: Michael Ellerman @ 2021-08-27 13:15 UTC (permalink / raw)
To: linuxppc-dev, Kajol Jain, mpe; +Cc: suka, atrajeev, maddy, rnsastry
In-Reply-To: <20210813082158.429023-1-kjain@linux.ibm.com>
On Fri, 13 Aug 2021 13:51:58 +0530, Kajol Jain wrote:
> H_GetPerformanceCounterInfo (0xF080) hcall returns the counter data in the
> result buffer. Result buffer has specific format defined in the PAPR
> specification. One of the field is counter offset and width of the counter
> data returned.
>
> Counter data are returned in a unsigned char array. To
> get the final counter data, these values should be left shifted
> byte at a time. But commit 220a0c609ad17 ("powerpc/perf: Add support
> for the hv gpci (get performance counter info) interface") made the
> shifting bitwise. Because of this, hcall counters values could end up
> in lower side, which messes the counter prev vs now calculation. This
> lead to huge counter value reporting
>
> [...]
Applied to powerpc/next.
[1/1] powerpc/perf/hv-gpci: Fix the logic to compute counter value from the hcall result buffer.
https://git.kernel.org/powerpc/c/f9addd85fbfacf0d155e83dbee8696d6df5ed0c7
cheers
^ permalink raw reply
* Re: [PATCH v4 1/3] powerpc/perf: Use stack siar instead of mfspr
From: Michael Ellerman @ 2021-08-27 13:16 UTC (permalink / raw)
To: linuxppc-dev, christophe.leroy, mpe, Kajol Jain; +Cc: atrajeev, maddy, rnsastry
In-Reply-To: <20210818171556.36912-1-kjain@linux.ibm.com>
On Wed, 18 Aug 2021 22:45:54 +0530, Kajol Jain wrote:
> Minor optimization in the 'perf_instruction_pointer' function code by
> making use of stack siar instead of mfspr.
>
>
>
>
Applied to powerpc/next.
[1/3] powerpc/perf: Use stack siar instead of mfspr
https://git.kernel.org/powerpc/c/b1643084d164cea0c107a39bcdf0119fc52619af
[2/3] powerpc/perf: Drop the case of returning 0 as instruction pointer
https://git.kernel.org/powerpc/c/cc90c6742ef5b438f4cb86029d7a794bd0a44a06
[3/3] powerpc/perf: Fix the check for SIAR value
https://git.kernel.org/powerpc/c/3c69a5f22223fa3e312689ec218b5059784d49d7
cheers
^ permalink raw reply
* Re: [PATCH v2 0/2] Kconfig symbol fixes on powerpc
From: Michael Ellerman @ 2021-08-27 13:15 UTC (permalink / raw)
To: Lukas Bulwahn, linuxppc-dev, Michael Neuling, kvm-ppc,
Benjamin Herrenschmidt, Michael Ellerman, Paul Mackerras,
Anshuman Khandual
Cc: kernel-janitors, stable, linux-kernel
In-Reply-To: <20210819113954.17515-1-lukas.bulwahn@gmail.com>
On Thu, 19 Aug 2021 13:39:52 +0200, Lukas Bulwahn wrote:
> The script ./scripts/checkkconfigsymbols.py warns on invalid references to
> Kconfig symbols (often, minor typos, name confusions or outdated references).
>
> This patch series addresses all issues reported by
> ./scripts/checkkconfigsymbols.py in ./drivers/usb/ for Kconfig and Makefile
> files. Issues in the Kconfig and Makefile files indicate some shortcomings in
> the overall build definitions, and often are true actionable issues to address.
>
> [...]
Patch 1 applied to powerpc/next.
[1/2] powerpc: kvm: remove obsolete and unneeded select
https://git.kernel.org/powerpc/c/c26d4c5d4f0df7207da3975458261927f9305465
cheers
^ permalink raw reply
* Re: [PATCH v2] ppc: add "-z notext" flag to disable diagnostic
From: Michael Ellerman @ 2021-08-27 13:15 UTC (permalink / raw)
To: Daniel Axtens, Paul Mackerras, linuxppc-dev, clang-built-linux,
Nathan Chancellor, Fangrui Song, Benjamin Herrenschmidt,
Michael Ellerman, linux-kernel, Nick Desaulniers, Bill Wendling
Cc: Itaru Kitayama
In-Reply-To: <20210813200511.1905703-1-morbo@google.com>
On Fri, 13 Aug 2021 13:05:11 -0700, Bill Wendling wrote:
> Object files used to link .tmp_vmlinux.kallsyms1 have many R_PPC64_ADDR64
> relocations in non-SHF_WRITE sections. There are many text relocations (e.g. in
> .rela___ksymtab_gpl+* and .rela__mcount_loc sections) in a -pie link and are
> disallowed by LLD:
>
> ld.lld: error: can't create dynamic relocation R_PPC64_ADDR64 against local symbol in readonly segment; recompile object files with -fPIC or pass '-Wl,-z,notext' to allow text relocations in the output
> >>> defined in arch/powerpc/kernel/head_64.o
> >>> referenced by arch/powerpc/kernel/head_64.o:(__restart_table+0x10)
>
> [...]
Applied to powerpc/next.
[1/1] ppc: add "-z notext" flag to disable diagnostic
https://git.kernel.org/powerpc/c/0355785313e2191be4e1108cdbda94ddb0238c48
cheers
^ permalink raw reply
* Re: [PATCH] powerpc/pseries: Fix build error when NUMA=n
From: Michael Ellerman @ 2021-08-27 13:15 UTC (permalink / raw)
To: linuxppc-dev, Michael Ellerman; +Cc: ldufour
In-Reply-To: <20210816041032.2839343-1-mpe@ellerman.id.au>
On Mon, 16 Aug 2021 14:10:32 +1000, Michael Ellerman wrote:
> As reported by lkp, if NUMA=n we see a build error:
>
> arch/powerpc/platforms/pseries/hotplug-cpu.c: In function 'pseries_cpu_hotplug_init':
> arch/powerpc/platforms/pseries/hotplug-cpu.c:1022:8: error: 'node_to_cpumask_map' undeclared
> 1022 | node_to_cpumask_map[node]);
>
> Use cpumask_of_node() which has an empty stub for NUMA=n, and when
> NUMA=y does a lookup from node_to_cpumask_map[].
>
> [...]
Applied to powerpc/next.
[1/1] powerpc/pseries: Fix build error when NUMA=n
https://git.kernel.org/powerpc/c/8b893ef190b0c440877de04f767efca4bf4d6af8
cheers
^ permalink raw reply
* Re: (subset) [PATCH v2 00/60] KVM: PPC: Book3S HV P9: entry/exit optimisations
From: Michael Ellerman @ 2021-08-27 13:16 UTC (permalink / raw)
To: Nicholas Piggin, kvm-ppc; +Cc: linuxppc-dev
In-Reply-To: <20210811160134.904987-1-npiggin@gmail.com>
On Thu, 12 Aug 2021 02:00:34 +1000, Nicholas Piggin wrote:
> This reduces radix guest full entry/exit latency on POWER9 and POWER10
> by 2x.
>
> Nested HV guests should see smaller improvements in their L1 entry/exit,
> but this is also combined with most L0 speedups also applying to nested
> entry. nginx localhost throughput test in a SMP nested guest is improved
> about 10% (in a direct guest it doesn't change much because it uses XIVE
> for IPIs) when L0 and L1 are patched.
>
> [...]
Applied to powerpc/next.
[01/60] KVM: PPC: Book3S HV: Initialise vcpu MSR with MSR_ME
https://git.kernel.org/powerpc/c/fd42b7b09c602c904452c0c3e5955ca21d8e387a
[02/60] KVM: PPC: Book3S HV: Remove TM emulation from POWER7/8 path
https://git.kernel.org/powerpc/c/daac40e8d7a63ab8608132a7cfce411986feac32
[03/60] KVM: PPC: Book3S HV P9: Fixes for TM softpatch interrupt NIP
https://git.kernel.org/powerpc/c/4782e0cd0d184d727ad3b0cfe20d1d44d9f98239
[04/60] KVM: PPC: Book3S HV Nested: Fix TM softpatch HFAC interrupt emulation
https://git.kernel.org/powerpc/c/d82b392d9b3556b63e3f9916cf057ea847e173a9
[05/60] KVM: PPC: Book3S HV Nested: Sanitise vcpu registers
https://git.kernel.org/powerpc/c/7487cabc7ed2f7716bf304e4e97c57fd995cf70e
[06/60] KVM: PPC: Book3S HV Nested: Make nested HFSCR state accessible
https://git.kernel.org/powerpc/c/8b210a880b35ba75eb42b79dfd65e369c1feb119
[07/60] KVM: PPC: Book3S HV Nested: Stop forwarding all HFUs to L1
https://git.kernel.org/powerpc/c/7c3ded5735141ff4d049747c9f76672a8b737c49
[08/60] KVM: PPC: Book3S HV Nested: save_hv_return_state does not require trap argument
https://git.kernel.org/powerpc/c/f2e29db156523bf08a0524e0f4306a641912c6d9
[09/60] KVM: PPC: Book3S HV Nested: Reflect guest PMU in-use to L0 when guest SPRs are live
https://git.kernel.org/powerpc/c/1782663897945a5cf28e564ba5eed730098e9aa4
[10/60] powerpc/64s: Remove WORT SPR from POWER9/10
https://git.kernel.org/powerpc/c/0c8fb653d487d2873f5eefdcaf4cecff4e103828
cheers
^ permalink raw reply
* Re: [PATCH] powerpc/head_check: use stdout for error messages
From: Michael Ellerman @ 2021-08-27 13:15 UTC (permalink / raw)
To: Randy Dunlap, linux-kernel
Cc: Chen, Rong A, Nicholas Piggin, Paul Mackerras, linuxppc-dev
In-Reply-To: <20210815222334.9575-1-rdunlap@infradead.org>
On Sun, 15 Aug 2021 15:23:34 -0700, Randy Dunlap wrote:
> Prefer stderr instead of stdout for error messages.
> This is a good practice and can help CI error detecting and
> reporting (0day in this case).
>
>
>
>
> [...]
Applied to powerpc/next.
[1/1] powerpc/head_check: use stdout for error messages
https://git.kernel.org/powerpc/c/47c258d71ebfc832a760a1dc6540cf3c33968023
cheers
^ permalink raw reply
* Re: [PATCH v2 0/4] Some improvements on regs usage
From: Michael Ellerman @ 2021-08-27 13:16 UTC (permalink / raw)
To: linuxppc-dev, sxwjean
Cc: ravi.bangoria, Xiongwei Song, npiggin, oleg, efremov,
linux-kernel, paulus, aneesh.kumar
In-Reply-To: <20210807010239.416055-1-sxwjean@me.com>
On Sat, 7 Aug 2021 09:02:35 +0800, sxwjean@me.com wrote:
> From: Xiongwei Song <sxwjean@gmail.com>
>
> When CONFIG_4xx=y or CONFIG_BOOKE=y, currently in code we reference dsisr
> to get interrupt reasons and reference dar to get excepiton address.
> However, in reference manuals, esr is used for interrupt reasons and dear
> is used for excepiton address, so the patchset changes dsisr -> esr,
> dar -> dear for CONFIG_4xx=y or CONFIG_BOOKE=y.
>
> [...]
Applied to powerpc/next.
[1/4] powerpc: Optimize register usage for esr register
https://git.kernel.org/powerpc/c/4f8e78c0757e3c5a65d9d8ac76e2434c71a78f5a
[2/4] powerpc/64e: Get esr offset with _ESR macro
https://git.kernel.org/powerpc/c/cfa47772ca8d53d7a6c9b331a7f6e7c4c9827214
[3/4] powerpc: Optimize register usage for dear register
https://git.kernel.org/powerpc/c/4872cbd0ca35ca5b20d52e2539e7e1950f126e7b
[4/4] powerpc/64e: Get dear offset with _DEAR macro
https://git.kernel.org/powerpc/c/d9db6e420268b2d561731468a31f0b15e2e9a145
cheers
^ permalink raw reply
* Re: [PATCH] [v2] arch: powerpc: Remove duplicate includes
From: Michael Ellerman @ 2021-08-27 13:15 UTC (permalink / raw)
To: Frederic Weisbecker, Paul Mackerras, Christophe Leroy,
Pingfan Liu, linuxppc-dev, linux-kernel, Wan Jiabing,
Ganesh Goudar, Benjamin Herrenschmidt, Randy Dunlap,
Cédric Le Goater, Michael Ellerman, Geert Uytterhoeven,
Aneesh Kumar K.V, Nicholas Piggin, Michal Suchanek
Cc: kael_w
In-Reply-To: <20210323062916.295346-1-wanjiabing@vivo.com>
On Tue, 23 Mar 2021 14:29:05 +0800, Wan Jiabing wrote:
> mmu-hash.h: asm/bug.h has been included at line 12, so remove
> the duplicate one at line 21.
> interrupt.c: asm/interrupt.h has been included at line 12, so
> remove the duplicate one at line 10.
> time.c: linux/sched/clock.h has been included at line 33,so
> remove the duplicate one at line 56 and move sched/cputime.h
> under sched including segament.
>
> [...]
Applied to powerpc/next.
[1/1] arch: powerpc: Remove duplicate includes
https://git.kernel.org/powerpc/c/e225c4d6bc389701f2f63fc246420a1da3465ab5
cheers
^ permalink raw reply
* Re: [PATCH -next] selftests/powerpc: Remove duplicated include from tm-poison.c
From: Michael Ellerman @ 2021-08-27 13:15 UTC (permalink / raw)
To: Zheng Yongjun, Michael Ellerman, Shuah Khan
Cc: kernel-janitors, linuxppc-dev, linux-kselftest, Hulk Robot
In-Reply-To: <20210326064808.3262568-1-zhengyongjun3@huawei.com>
On Fri, 26 Mar 2021 14:48:08 +0800, Zheng Yongjun wrote:
> Remove duplicated include.
>
>
>
>
Applied to powerpc/next.
[1/1] selftests/powerpc: Remove duplicated include from tm-poison.c
https://git.kernel.org/powerpc/c/6af0b5570b59ce8dd1608a8e48f59eff3f4bdd04
cheers
^ permalink raw reply
* Re: [PATCH] powerpc/pseries: Fix build error when NUMA=n
From: Laurent Dufour @ 2021-08-27 13:24 UTC (permalink / raw)
To: Michael Ellerman, linuxppc-dev, Michael Ellerman
In-Reply-To: <163007014079.52768.17457843527177515212.b4-ty@ellerman.id.au>
Le 27/08/2021 à 15:15, Michael Ellerman a écrit :
> On Mon, 16 Aug 2021 14:10:32 +1000, Michael Ellerman wrote:
>> As reported by lkp, if NUMA=n we see a build error:
>>
>> arch/powerpc/platforms/pseries/hotplug-cpu.c: In function 'pseries_cpu_hotplug_init':
>> arch/powerpc/platforms/pseries/hotplug-cpu.c:1022:8: error: 'node_to_cpumask_map' undeclared
>> 1022 | node_to_cpumask_map[node]);
>>
>> Use cpumask_of_node() which has an empty stub for NUMA=n, and when
>> NUMA=y does a lookup from node_to_cpumask_map[].
>>
>> [...]
>
> Applied to powerpc/next.
>
> [1/1] powerpc/pseries: Fix build error when NUMA=n
> https://git.kernel.org/powerpc/c/8b893ef190b0c440877de04f767efca4bf4d6af8
>
> cheers
>
Thanks, Michael, for fixing my bugs !
^ permalink raw reply
* Re: [PATCH v2] powerpc/32s: Fix random crashes by adding isync() after locking/unlocking KUEP
From: Michael Ellerman @ 2021-08-27 13:25 UTC (permalink / raw)
To: Benjamin Herrenschmidt, Paul Mackerras, Christophe Leroy, fthain,
userm57, Michael Ellerman
Cc: linuxppc-dev, linux-kernel
In-Reply-To: <4856f5574906e2aec0522be17bf3848a22b2cd0b.1629269345.git.christophe.leroy@csgroup.eu>
On Wed, 18 Aug 2021 06:49:29 +0000 (UTC), Christophe Leroy wrote:
> Commit b5efec00b671 ("powerpc/32s: Move KUEP locking/unlocking in C")
> removed the 'isync' instruction after adding/removing NX bit in user
> segments. The reasoning behind this change was that when setting the
> NX bit we don't mind it taking effect with delay as the kernel never
> executes text from userspace, and when clearing the NX bit this is
> to return to userspace and then the 'rfi' should synchronise the
> context.
>
> [...]
Applied to powerpc/fixes.
[1/1] powerpc/32s: Fix random crashes by adding isync() after locking/unlocking KUEP
https://git.kernel.org/powerpc/c/ef486bf448a057a6e2d50e40ae879f7add6585da
cheers
^ permalink raw reply
* Re: [PATCH v2] powerpc/mm: Fix set_memory_*() against concurrent accesses
From: Michael Ellerman @ 2021-08-27 13:25 UTC (permalink / raw)
To: linuxppc-dev, Michael Ellerman
Cc: lvivier, jniethe5, aneesh.kumar, npiggin, farosas
In-Reply-To: <20210818120518.3603172-1-mpe@ellerman.id.au>
On Wed, 18 Aug 2021 22:05:18 +1000, Michael Ellerman wrote:
> Laurent reported that STRICT_MODULE_RWX was causing intermittent crashes
> on one of his systems:
>
> kernel tried to execute exec-protected page (c008000004073278) - exploit attempt? (uid: 0)
> BUG: Unable to handle kernel instruction fetch
> Faulting instruction address: 0xc008000004073278
> Oops: Kernel access of bad area, sig: 11 [#1]
> LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA pSeries
> Modules linked in: drm virtio_console fuse drm_panel_orientation_quirks ...
> CPU: 3 PID: 44 Comm: kworker/3:1 Not tainted 5.14.0-rc4+ #12
> Workqueue: events control_work_handler [virtio_console]
> NIP: c008000004073278 LR: c008000004073278 CTR: c0000000001e9de0
> REGS: c00000002e4ef7e0 TRAP: 0400 Not tainted (5.14.0-rc4+)
> MSR: 800000004280b033 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE> CR: 24002822 XER: 200400cf
> ...
> NIP fill_queue+0xf0/0x210 [virtio_console]
> LR fill_queue+0xf0/0x210 [virtio_console]
> Call Trace:
> fill_queue+0xb4/0x210 [virtio_console] (unreliable)
> add_port+0x1a8/0x470 [virtio_console]
> control_work_handler+0xbc/0x1e8 [virtio_console]
> process_one_work+0x290/0x590
> worker_thread+0x88/0x620
> kthread+0x194/0x1a0
> ret_from_kernel_thread+0x5c/0x64
>
> [...]
Applied to powerpc/fixes.
[1/1] powerpc/mm: Fix set_memory_*() against concurrent accesses
https://git.kernel.org/powerpc/c/9f7853d7609d59172eecfc5e7ccf503bc1b690bd
cheers
^ permalink raw reply
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