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1e61f5a95f
22238 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Linus Torvalds
|
5a55d36f71 |
powerpc fixes for 5.9 #5
Opt us out of the DEBUG_VM_PGTABLE support for now as it's causing crashes.
Fix a long standing bug in our DMA mask handling that was hidden until recently,
and which caused problems with some drivers.
Fix a boot failure on systems with large amounts of RAM, and no hugepage support
and using Radix MMU, only seen in the lab.
A few other minor fixes.
Thanks to:
Alexey Kardashevskiy, Aneesh Kumar K.V, Gautham R. Shenoy, Hari Bathini, Ira
Weiny, Nick Desaulniers, Shirisha Ganta, Vaibhav Jain, Vaidyanathan
Srinivasan.
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Merge tag 'powerpc-5.9-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"Some more powerpc fixes for 5.9:
- Opt us out of the DEBUG_VM_PGTABLE support for now as it's causing
crashes.
- Fix a long standing bug in our DMA mask handling that was hidden
until recently, and which caused problems with some drivers.
- Fix a boot failure on systems with large amounts of RAM, and no
hugepage support and using Radix MMU, only seen in the lab.
- A few other minor fixes.
Thanks to Alexey Kardashevskiy, Aneesh Kumar K.V, Gautham R. Shenoy,
Hari Bathini, Ira Weiny, Nick Desaulniers, Shirisha Ganta, Vaibhav
Jain, and Vaidyanathan Srinivasan"
* tag 'powerpc-5.9-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/papr_scm: Limit the readability of 'perf_stats' sysfs attribute
cpuidle: pseries: Fix CEDE latency conversion from tb to us
powerpc/dma: Fix dma_map_ops::get_required_mask
Revert "powerpc/build: vdso linker warning for orphan sections"
powerpc/mm: Remove DEBUG_VM_PGTABLE support on powerpc
selftests/powerpc: Skip PROT_SAO test in guests/LPARS
powerpc/book3s64/radix: Fix boot failure with large amount of guest memory
|
||
|
Linus Torvalds
|
973c096f6a |
vgacon: remove software scrollback support
Yunhai Zhang recently fixed a VGA software scrollback bug in commit
|
||
|
Vaibhav Jain
|
0460534b53 |
powerpc/papr_scm: Limit the readability of 'perf_stats' sysfs attribute
The newly introduced 'perf_stats' attribute uses the default access
mode of 0444, allowing non-root users to access performance stats of
an nvdimm and potentially force the kernel into issuing a large number
of expensive hypercalls. Since the information exposed by this
attribute cannot be cached it is better to ward off access to this
attribute from users who don't need to access to these performance
statistics.
Hence update the access mode of 'perf_stats' attribute to be only
readable by root users.
Fixes:
|
||
|
Alexey Kardashevskiy
|
437ef802e0 |
powerpc/dma: Fix dma_map_ops::get_required_mask
There are 2 problems with it: 1. "<" vs expected "<<" 2. the shift number is an IOMMU page number mask, not an address mask as the IOMMU page shift is missing. This did not hit us before |
||
|
Michael Ellerman
|
4c62285439 |
Revert "powerpc/build: vdso linker warning for orphan sections"
This reverts commit |
||
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Aneesh Kumar K.V
|
675bceb097 |
powerpc/mm: Remove DEBUG_VM_PGTABLE support on powerpc
The test is broken w.r.t page table update rules and results in kernel
crash as below. Disable the support until we get the tests updated.
[ 21.083519] kernel BUG at arch/powerpc/mm/pgtable.c:304!
cpu 0x0: Vector: 700 (Program Check) at [c000000c6d1e76c0]
pc: c00000000009a5ec: assert_pte_locked+0x14c/0x380
lr: c0000000005eeeec: pte_update+0x11c/0x190
sp: c000000c6d1e7950
msr: 8000000002029033
current = 0xc000000c6d172c80
paca = 0xc000000003ba0000 irqmask: 0x03 irq_happened: 0x01
pid = 1, comm = swapper/0
kernel BUG at arch/powerpc/mm/pgtable.c:304!
[link register ] c0000000005eeeec pte_update+0x11c/0x190
[c000000c6d1e7950] 0000000000000001 (unreliable)
[c000000c6d1e79b0] c0000000005eee14 pte_update+0x44/0x190
[c000000c6d1e7a10] c000000001a2ca9c pte_advanced_tests+0x160/0x3d8
[c000000c6d1e7ab0] c000000001a2d4fc debug_vm_pgtable+0x7e8/0x1338
[c000000c6d1e7ba0] c0000000000116ec do_one_initcall+0xac/0x5f0
[c000000c6d1e7c80] c0000000019e4fac kernel_init_freeable+0x4dc/0x5a4
[c000000c6d1e7db0] c000000000012474 kernel_init+0x24/0x160
[c000000c6d1e7e20] c00000000000cbd0 ret_from_kernel_thread+0x5c/0x6c
With DEBUG_VM disabled
[ 20.530152] BUG: Kernel NULL pointer dereference on read at 0x00000000
[ 20.530183] Faulting instruction address: 0xc0000000000df330
cpu 0x33: Vector: 380 (Data SLB Access) at [c000000c6d19f700]
pc: c0000000000df330: memset+0x68/0x104
lr: c00000000009f6d8: hash__pmdp_huge_get_and_clear+0xe8/0x1b0
sp: c000000c6d19f990
msr: 8000000002009033
dar: 0
current = 0xc000000c6d177480
paca = 0xc00000001ec4f400 irqmask: 0x03 irq_happened: 0x01
pid = 1, comm = swapper/0
[link register ] c00000000009f6d8 hash__pmdp_huge_get_and_clear+0xe8/0x1b0
[c000000c6d19f990] c00000000009f748 hash__pmdp_huge_get_and_clear+0x158/0x1b0 (unreliable)
[c000000c6d19fa10] c0000000019ebf30 pmd_advanced_tests+0x1f0/0x378
[c000000c6d19fab0] c0000000019ed088 debug_vm_pgtable+0x79c/0x1244
[c000000c6d19fba0] c0000000000116ec do_one_initcall+0xac/0x5f0
[c000000c6d19fc80] c0000000019a4fac kernel_init_freeable+0x4dc/0x5a4
[c000000c6d19fdb0] c000000000012474 kernel_init+0x24/0x160
[c000000c6d19fe20] c00000000000cbd0 ret_from_kernel_thread+0x5c/0x6c
33:mon>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200902040122.136414-1-aneesh.kumar@linux.ibm.com
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Linus Torvalds
|
b69bea8a65 |
A set of fixes for lockdep, tracing and RCU:
- Prevent recursion by using raw_cpu_* operations
- Fixup the interrupt state in the cpu idle code to be consistent
- Push rcu_idle_enter/exit() invocations deeper into the idle path so
that the lock operations are inside the RCU watching sections
- Move trace_cpu_idle() into generic code so it's called before RCU goes
idle.
- Handle raw_local_irq* vs. local_irq* operations correctly
- Move the tracepoints out from under the lockdep recursion handling
which turned out to be fragile and inconsistent.
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Merge tag 'locking-urgent-2020-08-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fixes from Thomas Gleixner:
"A set of fixes for lockdep, tracing and RCU:
- Prevent recursion by using raw_cpu_* operations
- Fixup the interrupt state in the cpu idle code to be consistent
- Push rcu_idle_enter/exit() invocations deeper into the idle path so
that the lock operations are inside the RCU watching sections
- Move trace_cpu_idle() into generic code so it's called before RCU
goes idle.
- Handle raw_local_irq* vs. local_irq* operations correctly
- Move the tracepoints out from under the lockdep recursion handling
which turned out to be fragile and inconsistent"
* tag 'locking-urgent-2020-08-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
lockdep,trace: Expose tracepoints
lockdep: Only trace IRQ edges
mips: Implement arch_irqs_disabled()
arm64: Implement arch_irqs_disabled()
nds32: Implement arch_irqs_disabled()
locking/lockdep: Cleanup
x86/entry: Remove unused THUNKs
cpuidle: Move trace_cpu_idle() into generic code
cpuidle: Make CPUIDLE_FLAG_TLB_FLUSHED generic
sched,idle,rcu: Push rcu_idle deeper into the idle path
cpuidle: Fixup IRQ state
lockdep: Use raw_cpu_*() for per-cpu variables
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||
|
Linus Torvalds
|
8bb5021cc2 |
powerpc fixes for 5.9 #4
Revert our removal of PROT_SAO, at least one user expressed an interest in using it on Power9. Instead don't allow it to be used in guests unless enabled explicitly at compile time. A fix for a crash introduced by a recent change to FP handling. Revert a change to our idle code that left Power10 with no idle support. One minor fix for the new scv system call path to set PPR. Fix a crash in our "generic" PMU if branch stack events were enabled. A fix for the IMC PMU, to correctly identify host kernel samples. The ADB_PMU powermac code was found to be incompatible with VMAP_STACK, so make them incompatible in Kconfig until the code can be fixed. A build fix in drivers/video/fbdev/controlfb.c, and a documentation fix. Thanks to: Alexey Kardashevskiy, Athira Rajeev, Christophe Leroy, Giuseppe Sacco, Madhavan Srinivasan, Milton Miller, Nicholas Piggin, Pratik Rajesh Sampat, Randy Dunlap, Shawn Anastasio, Vaidyanathan Srinivasan. -----BEGIN PGP SIGNATURE----- iQJHBAABCAAxFiEEJFGtCPCthwEv2Y/bUevqPMjhpYAFAl9LlF8THG1wZUBlbGxl cm1hbi5pZC5hdQAKCRBR6+o8yOGlgEwJD/4nEkp9id7bZyiGruoawqxdpmc9viIp JFRH3+eHWbE5rfoXn7fwM1zTE9SsHxCd0q09cHk2rtAwKMXcJW83/pXNuWEjIzcy 7Ra8Zq2jRl6qgWAx84VKoZVg+W40yNFex0M0akMQV55SjYOTN8gpGe+algi+wPaH 44oYBYctDi3B9X8CsaUQEdov1EZdWT6TxcN9xIJiIdr53VXMER6C+ytYV8VgkGHW Qt+Ardyvp6eNq9+foGegRSk3OmNcmj+CJZYzhkp5+1k9ko9GQ8wg9NzxTV4ZoSJ9 g5rgD4ztBfLGyUDu6oUypzOnSVbfzJh9JPH/h1zaSOjSv9MnJ20zqvqjD7QXFNbs j960PiylTfVWdnOoUUkvON0UOYZM9XiZP63i8z/mBsMJ5BFaLB1TonZ+lDwXc1vK MHXhjahP2qP0LnJZ/M5gT3zfLPyrKoeIlmLTOkLjrM5C9mcSxpPnagq+AHacfYpG sGrg2LGLfBo/9PomUNHseQhBfsc2uYwM924si9MpNWN6BT+TNgTJYeNPDOnvRCbG ivDQ7HFZ6aiOj+b5iTZI2RV3EOaBKZgo+VEryNDnqd7etjyDr5PNbooGaHJDgsnz mNFxUNusxzv0vMI3zyFtLMTe/99/NlRSYyMXPL8SL7MvlRt624ngrrxYv+2+dBRt aIpxSpgdqTVXSw== =t+yB -----END PGP SIGNATURE----- Merge tag 'powerpc-5.9-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fixes from Michael Ellerman: - Revert our removal of PROT_SAO, at least one user expressed an interest in using it on Power9. Instead don't allow it to be used in guests unless enabled explicitly at compile time. - A fix for a crash introduced by a recent change to FP handling. - Revert a change to our idle code that left Power10 with no idle support. - One minor fix for the new scv system call path to set PPR. - Fix a crash in our "generic" PMU if branch stack events were enabled. - A fix for the IMC PMU, to correctly identify host kernel samples. - The ADB_PMU powermac code was found to be incompatible with VMAP_STACK, so make them incompatible in Kconfig until the code can be fixed. - A build fix in drivers/video/fbdev/controlfb.c, and a documentation fix. Thanks to Alexey Kardashevskiy, Athira Rajeev, Christophe Leroy, Giuseppe Sacco, Madhavan Srinivasan, Milton Miller, Nicholas Piggin, Pratik Rajesh Sampat, Randy Dunlap, Shawn Anastasio, Vaidyanathan Srinivasan. * tag 'powerpc-5.9-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/32s: Disable VMAP stack which CONFIG_ADB_PMU Revert "powerpc/powernv/idle: Replace CPU feature check with PVR check" powerpc/perf: Fix reading of MSR[HV/PR] bits in trace-imc powerpc/perf: Fix crashes with generic_compat_pmu & BHRB powerpc/64s: Fix crash in load_fp_state() due to fpexc_mode powerpc/64s: scv entry should set PPR Documentation/powerpc: fix malformed table in syscall64-abi video: fbdev: controlfb: Fix build for COMPILE_TEST=y && PPC_PMAC=n selftests/powerpc: Update PROT_SAO test to skip ISA 3.1 powerpc/64s: Disallow PROT_SAO in LPARs by default Revert "powerpc/64s: Remove PROT_SAO support" |
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Aneesh Kumar K.V
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103a8542cb |
powerpc/book3s64/radix: Fix boot failure with large amount of guest memory
If the hypervisor doesn't support hugepages, the kernel ends up allocating a large
number of page table pages. The early page table allocation was wrongly
setting the max memblock limit to ppc64_rma_size with radix translation
which resulted in boot failure as shown below.
Kernel panic - not syncing:
early_alloc_pgtable: Failed to allocate 16777216 bytes align=0x1000000 nid=-1 from=0x0000000000000000 max_addr=0xffffffffffffffff
CPU: 0 PID: 0 Comm: swapper Not tainted 5.8.0-24.9-default+ #2
Call Trace:
[c0000000016f3d00] [c0000000007c6470] dump_stack+0xc4/0x114 (unreliable)
[c0000000016f3d40] [c00000000014c78c] panic+0x164/0x418
[c0000000016f3dd0] [c000000000098890] early_alloc_pgtable+0xe0/0xec
[c0000000016f3e60] [c0000000010a5440] radix__early_init_mmu+0x360/0x4b4
[c0000000016f3ef0] [c000000001099bac] early_init_mmu+0x1c/0x3c
[c0000000016f3f10] [c00000000109a320] early_setup+0x134/0x170
This was because the kernel was checking for the radix feature before we enable the
feature via mmu_features. This resulted in the kernel using hash restrictions on
radix.
Rework the early init code such that the kernel boot with memblock restrictions
as imposed by hash. At that point, the kernel still hasn't finalized the
translation the kernel will end up using.
We have three different ways of detecting radix.
1. dt_cpu_ftrs_scan -> used only in case of PowerNV
2. ibm,pa-features -> Used when we don't use cpu_dt_ftr_scan
3. CAS -> Where we negotiate with hypervisor about the supported translation.
We look at 1 or 2 early in the boot and after that, we look at the CAS vector to
finalize the translation the kernel will use. We also support a kernel command
line option (disable_radix) to switch to hash.
Update the memblock limit after mmu_early_init_devtree() if the kernel is going
to use radix translation. This forces some of the memblock allocations we do before
mmu_early_init_devtree() to be within the RMA limit.
Fixes:
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Christophe Leroy
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4a133eb351 |
powerpc/32s: Disable VMAP stack which CONFIG_ADB_PMU
low_sleep_handler() can't restore the context from virtual
stack because the stack can hardly be accessed with MMU OFF.
For now, disable VMAP stack when CONFIG_ADB_PMU is selected.
Fixes:
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Pratik Rajesh Sampat
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16d83a540c |
Revert "powerpc/powernv/idle: Replace CPU feature check with PVR check"
cpuidle stop state implementation has minor optimizations for P10 where hardware preserves more SPR registers compared to P9. The current P9 driver works for P10, although does few extra save-restores. P9 driver can provide the required power management features like SMT thread folding and core level power savings on a P10 platform. Until the P10 stop driver is available, revert the commit which allows for only P9 systems to utilize cpuidle and blocks all idle stop states for P10. CPU idle states are enabled and tested on the P10 platform with this fix. This reverts commit |
||
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Athira Rajeev
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82715a0f33 |
powerpc/perf: Fix reading of MSR[HV/PR] bits in trace-imc
IMC trace-mode uses MSR[HV/PR] bits to set the cpumode for the
instruction pointer captured in each sample. The bits are fetched from
the third double word of the trace record. Reading third double word
from IMC trace record should use be64_to_cpu() along with READ_ONCE
inorder to fetch correct MSR[HV/PR] bits. Patch addresses this change.
Currently we are using PERF_RECORD_MISC_HYPERVISOR as cpumode if MSR
HV is 1 and PR is 0 which means the address is from host counter. But
using PERF_RECORD_MISC_HYPERVISOR for host counter data will fail to
resolve the address -> symbol during "perf report" because perf tools
side uses PERF_RECORD_MISC_KERNEL to represent the host counter data.
Therefore, fix the trace imc sample data to use
PERF_RECORD_MISC_KERNEL as cpumode for host kernel information.
Fixes:
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Alexey Kardashevskiy
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b460b51241 |
powerpc/perf: Fix crashes with generic_compat_pmu & BHRB
The bhrb_filter_map ("The Branch History Rolling Buffer") callback is
only defined in raw CPUs' power_pmu structs. The "architected" CPUs
use generic_compat_pmu, which does not have this callback, and crashes
occur if a user tries to enable branch stack for an event.
This add a NULL pointer check for bhrb_filter_map() which behaves as
if the callback returned an error.
This does not add the same check for config_bhrb() as the only caller
checks for cpuhw->bhrb_users which remains zero if bhrb_filter_map==0.
Fixes:
|
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Michael Ellerman
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b91eb51824 |
powerpc/64s: Fix crash in load_fp_state() due to fpexc_mode
The recent commit |
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Nicholas Piggin
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e5fe56092e |
powerpc/64s: scv entry should set PPR
Kernel entry sets PPR to HMT_MEDIUM by convention. The scv entry
path missed this.
Fixes:
|
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Nicholas Piggin
|
044d0d6de9 |
lockdep: Only trace IRQ edges
Problem:
raw_local_irq_save(); // software state on
local_irq_save(); // software state off
...
local_irq_restore(); // software state still off, because we don't enable IRQs
raw_local_irq_restore(); // software state still off, *whoopsie*
existing instances:
- lock_acquire()
raw_local_irq_save()
__lock_acquire()
arch_spin_lock(&graph_lock)
pv_wait() := kvm_wait() (same or worse for Xen/HyperV)
local_irq_save()
- trace_clock_global()
raw_local_irq_save()
arch_spin_lock()
pv_wait() := kvm_wait()
local_irq_save()
- apic_retrigger_irq()
raw_local_irq_save()
apic->send_IPI() := default_send_IPI_single_phys()
local_irq_save()
Possible solutions:
A) make it work by enabling the tracing inside raw_*()
B) make it work by keeping tracing disabled inside raw_*()
C) call it broken and clean it up now
Now, given that the only reason to use the raw_* variant is because you don't
want tracing. Therefore A) seems like a weird option (although it can be done).
C) is tempting, but OTOH it ends up converting a _lot_ of code to raw just
because there is one raw user, this strips the validation/tracing off for all
the other users.
So we pick B) and declare any code that ends up doing:
raw_local_irq_save()
local_irq_save()
lockdep_assert_irqs_disabled();
broken. AFAICT this problem has existed forever, the only reason it came
up is because commit:
|
||
|
Shawn Anastasio
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9b725a90a8 |
powerpc/64s: Disallow PROT_SAO in LPARs by default
Since migration of guests using SAO to ISA 3.1 hosts may cause issues, disable PROT_SAO in LPARs by default and introduce a new Kconfig option PPC_PROT_SAO_LPAR to allow users to enable it if desired. Signed-off-by: Shawn Anastasio <shawn@anastas.io> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200821185558.35561-3-shawn@anastas.io |
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Shawn Anastasio
|
12564485ed |
Revert "powerpc/64s: Remove PROT_SAO support"
This reverts commit
|
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Gustavo A. R. Silva
|
df561f6688 |
treewide: Use fallthrough pseudo-keyword
Replace the existing /* fall through */ comments and its variants with the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary fall-through markings when it is the case. [1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> |
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Linus Torvalds
|
cb95712138 |
powerpc fixes for 5.9 #3
Add perf support for emitting extended registers for power10. A fix for CPU hotplug on pseries, where on large/loaded systems we may not wait long enough for the CPU to be offlined, leading to crashes. Addition of a raw cputable entry for Power10, which is not required to boot, but is required to make our PMU setup work correctly in guests. Three fixes for the recent changes on 32-bit Book3S to move modules into their own segment for strict RWX. A fix for a recent change in our powernv PCI code that could lead to crashes. A change to our perf interrupt accounting to avoid soft lockups when using some events, found by syzkaller. A change in the way we handle power loss events from the hypervisor on pseries. We no longer immediately shut down if we're told we're running on a UPS. A few other minor fixes. Thanks to: Alexey Kardashevskiy, Andreas Schwab, Aneesh Kumar K.V, Anju T Sudhakar, Athira Rajeev, Christophe Leroy, Frederic Barrat, Greg Kurz, Kajol Jain, Madhavan Srinivasan, Michael Neuling, Michael Roth, Nageswara R Sastry, Oliver O'Halloran, Thiago Jung Bauermann, Vaidyanathan Srinivasan, Vasant Hegde. -----BEGIN PGP SIGNATURE----- iQJHBAABCAAxFiEEJFGtCPCthwEv2Y/bUevqPMjhpYAFAl9CYMwTHG1wZUBlbGxl cm1hbi5pZC5hdQAKCRBR6+o8yOGlgC/wEACljEVnfHzUObmIgqn9Ru3JlfEI6Hlk ts7kajCgS/I/bV6DoDMZ8rlZX87QFOwiBkNM1I+vGHSLAuzsmFAnbFPyxw/idxpQ XUoNy8OCvbbzCPzChYdiU0PxW2h2i+QxkmktlWSN1SAPudJUWvoPS2Y4+sC4zksk B4B6tbW2DT8TFO1kKeZsU9r2t+EH5KwlIOi+uxbH8d76lJINKkBNSnjzMytl7drM TZx/HWr8+s/WJo1787x6bv8gxs5tV9b4vIKt2YZNTY2kvYsEDE+fBR1XfCAneXMw ASYnZV+/xCLIUpRF6DI4RAShLBT/Sfiy1yMTndZgfqAgquokFosszNx2zrk0IzCd AgqX93YGbGz/H72W3Y/B0W9+74XyO/u2D9zhNpkCRMpdcsM5MbvOQrQA5Ustu47E av5MOaF/nNCd8J+OC4Qjgt5VFb/s0h4FdtrwT80srOa2U6Of9cD/T6xAfOszSJ96 cWdSb5qhn5wuD9pP32KjwdmWBiUw38/gnRGKpRlOVzyHL/GKZijyaBbWBlkoEmty 0nbjWW/IVfsOb5Weuiybg541h/QOVuOkb2pOvPClITiH83MY/AciDJ+auo4M//hW haKz9IgV/KctmzDE+v9d0BD8sGmW03YUcQAPdRufI0eGXijDLcnHeuk2B3Nu84Pq 8mtev+VQ+T6cZA== =sdJ1 -----END PGP SIGNATURE----- Merge tag 'powerpc-5.9-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fixes from Michael Ellerman: - Add perf support for emitting extended registers for power10. - A fix for CPU hotplug on pseries, where on large/loaded systems we may not wait long enough for the CPU to be offlined, leading to crashes. - Addition of a raw cputable entry for Power10, which is not required to boot, but is required to make our PMU setup work correctly in guests. - Three fixes for the recent changes on 32-bit Book3S to move modules into their own segment for strict RWX. - A fix for a recent change in our powernv PCI code that could lead to crashes. - A change to our perf interrupt accounting to avoid soft lockups when using some events, found by syzkaller. - A change in the way we handle power loss events from the hypervisor on pseries. We no longer immediately shut down if we're told we're running on a UPS. - A few other minor fixes. Thanks to Alexey Kardashevskiy, Andreas Schwab, Aneesh Kumar K.V, Anju T Sudhakar, Athira Rajeev, Christophe Leroy, Frederic Barrat, Greg Kurz, Kajol Jain, Madhavan Srinivasan, Michael Neuling, Michael Roth, Nageswara R Sastry, Oliver O'Halloran, Thiago Jung Bauermann, Vaidyanathan Srinivasan, Vasant Hegde. * tag 'powerpc-5.9-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/perf/hv-24x7: Move cpumask file to top folder of hv-24x7 driver powerpc/32s: Fix module loading failure when VMALLOC_END is over 0xf0000000 powerpc/pseries: Do not initiate shutdown when system is running on UPS powerpc/perf: Fix soft lockups due to missed interrupt accounting powerpc/powernv/pci: Fix possible crash when releasing DMA resources powerpc/pseries/hotplug-cpu: wait indefinitely for vCPU death powerpc/32s: Fix is_module_segment() when MODULES_VADDR is defined powerpc/kasan: Fix KASAN_SHADOW_START on BOOK3S_32 powerpc/fixmap: Fix the size of the early debug area powerpc/pkeys: Fix build error with PPC_MEM_KEYS disabled powerpc/kernel: Cleanup machine check function declarations powerpc: Add POWER10 raw mode cputable entry powerpc/perf: Add extended regs support for power10 platform powerpc/perf: Add support for outputting extended regs in perf intr_regs powerpc: Fix P10 PVR revision in /proc/cpuinfo for SMT4 cores |
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|
Linus Torvalds
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b2d9e99622 |
* PAE and PKU bugfixes for x86
* selftests fix for new binutils * MMU notifier fix for arm64 -----BEGIN PGP SIGNATURE----- iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAl9ARnoUHHBib256aW5p QHJlZGhhdC5jb20ACgkQv/vSX3jHroP2YAf/dgLrPm4y4jxm7Aiz3/txqrHEwogT ZtvnzqUPb6+vkFrkop8QMOPw7A8NCfkn3/6sWbyUN5ObgOG1pxKyPraeN3ZdsDoR KGwv6P0dKgI8B4UuGEMe9GazXv+oOv8+bSUJnE+HZiUHzJKlX4HJbxDwUhvSSatY qYCZb/Uzqundh79TYULa7oI1/3F15A2J1zQPe4QgkToH9tsVB8PVfkH5uPJPp64M DTm5+qgwwsBULFaAuuo3FTs9f3pWJxn8GOuico1Sm+RnR53mhbUJggUfFzP0rwzZ Emevunje5r1rluFs+JWeNtflGH0gI4CLak7jvlOOBjrNb5XJgUSbzLXxkA== =Jwic -----END PGP SIGNATURE----- Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm Pull kvm fixes from Paolo Bonzini: - PAE and PKU bugfixes for x86 - selftests fix for new binutils - MMU notifier fix for arm64 * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: arm64: Only reschedule if MMU_NOTIFIER_RANGE_BLOCKABLE is not set KVM: Pass MMU notifier range flags to kvm_unmap_hva_range() kvm: x86: Toggling CR4.PKE does not load PDPTEs in PAE mode kvm: x86: Toggling CR4.SMAP does not load PDPTEs in PAE mode KVM: x86: fix access code passed to gva_to_gpa selftests: kvm: Use a shorter encoding to clear RAX |
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Will Deacon
|
fdfe7cbd58 |
KVM: Pass MMU notifier range flags to kvm_unmap_hva_range()
The 'flags' field of 'struct mmu_notifier_range' is used to indicate
whether invalidate_range_{start,end}() are permitted to block. In the
case of kvm_mmu_notifier_invalidate_range_start(), this field is not
forwarded on to the architecture-specific implementation of
kvm_unmap_hva_range() and therefore the backend cannot sensibly decide
whether or not to block.
Add an extra 'flags' parameter to kvm_unmap_hva_range() so that
architectures are aware as to whether or not they are permitted to block.
Cc: <stable@vger.kernel.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Message-Id: <20200811102725.7121-2-will@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Kajol Jain
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64ef8f2c47 |
powerpc/perf/hv-24x7: Move cpumask file to top folder of hv-24x7 driver
Commit |
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Christophe Leroy
|
541cebb51f |
powerpc/32s: Fix module loading failure when VMALLOC_END is over 0xf0000000
In is_module_segment(), when VMALLOC_END is over 0xf0000000,
ALIGN(VMALLOC_END, SZ_256M) has value 0.
In that case, addr >= ALIGN(VMALLOC_END, SZ_256M) is always
true then is_module_segment() always returns false.
Use (ALIGN(VMALLOC_END, SZ_256M) - 1) which will have
value 0xffffffff and will be suitable for the comparison.
Fixes:
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Vasant Hegde
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90a9b102ed |
powerpc/pseries: Do not initiate shutdown when system is running on UPS
As per PAPR we have to look for both EPOW sensor value and event modifier to identify the type of event and take appropriate action. In LoPAPR v1.1 section 10.2.2 includes table 136 "EPOW Action Codes": SYSTEM_SHUTDOWN 3 The system must be shut down. An EPOW-aware OS logs the EPOW error log information, then schedules the system to be shut down to begin after an OS defined delay internal (default is 10 minutes.) Then in section 10.3.2.2.8 there is table 146 "Platform Event Log Format, Version 6, EPOW Section", which includes the "EPOW Event Modifier": For EPOW sensor value = 3 0x01 = Normal system shutdown with no additional delay 0x02 = Loss of utility power, system is running on UPS/Battery 0x03 = Loss of system critical functions, system should be shutdown 0x04 = Ambient temperature too high All other values = reserved We have a user space tool (rtas_errd) on LPAR to monitor for EPOW_SHUTDOWN_ON_UPS. Once it gets an event it initiates shutdown after predefined time. It also starts monitoring for any new EPOW events. If it receives "Power restored" event before predefined time it will cancel the shutdown. Otherwise after predefined time it will shutdown the system. Commit |
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Athira Rajeev
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17899eaf88 |
powerpc/perf: Fix soft lockups due to missed interrupt accounting
Performance monitor interrupt handler checks if any counter has overflown and calls record_and_restart() in core-book3s which invokes perf_event_overflow() to record the sample information. Apart from creating sample, perf_event_overflow() also does the interrupt and period checks via perf_event_account_interrupt(). Currently we record information only if the SIAR (Sampled Instruction Address Register) valid bit is set (using siar_valid() check) and hence the interrupt check. But it is possible that we do sampling for some events that are not generating valid SIAR, and hence there is no chance to disable the event if interrupts are more than max_samples_per_tick. This leads to soft lockup. Fix this by adding perf_event_account_interrupt() in the invalid SIAR code path for a sampling event. ie if SIAR is invalid, just do interrupt check and don't record the sample information. Reported-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com> Tested-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/1596717992-7321-1-git-send-email-atrajeev@linux.vnet.ibm.com |
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Frederic Barrat
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e17a7c0e0a |
powerpc/powernv/pci: Fix possible crash when releasing DMA resources
Fix a typo introduced during recent code cleanup, which could lead to
silently not freeing resources or an oops message (on PCI hotplug or
CAPI reset).
Only impacts ioda2, the code path for ioda1 is correct.
Fixes:
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Michael Roth
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801980f649 |
powerpc/pseries/hotplug-cpu: wait indefinitely for vCPU death
For a power9 KVM guest with XIVE enabled, running a test loop
where we hotplug 384 vcpus and then unplug them, the following traces
can be seen (generally within a few loops) either from the unplugged
vcpu:
cpu 65 (hwid 65) Ready to die...
Querying DEAD? cpu 66 (66) shows 2
list_del corruption. next->prev should be c00a000002470208, but was c00a000002470048
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:56!
Oops: Exception in kernel mode, sig: 5 [#1]
LE SMP NR_CPUS=2048 NUMA pSeries
Modules linked in: fuse nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 ...
CPU: 66 PID: 0 Comm: swapper/66 Kdump: loaded Not tainted 4.18.0-221.el8.ppc64le #1
NIP: c0000000007ab50c LR: c0000000007ab508 CTR: 00000000000003ac
REGS: c0000009e5a17840 TRAP: 0700 Not tainted (4.18.0-221.el8.ppc64le)
MSR: 800000000282b033 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE> CR: 28000842 XER: 20040000
...
NIP __list_del_entry_valid+0xac/0x100
LR __list_del_entry_valid+0xa8/0x100
Call Trace:
__list_del_entry_valid+0xa8/0x100 (unreliable)
free_pcppages_bulk+0x1f8/0x940
free_unref_page+0xd0/0x100
xive_spapr_cleanup_queue+0x148/0x1b0
xive_teardown_cpu+0x1bc/0x240
pseries_mach_cpu_die+0x78/0x2f0
cpu_die+0x48/0x70
arch_cpu_idle_dead+0x20/0x40
do_idle+0x2f4/0x4c0
cpu_startup_entry+0x38/0x40
start_secondary+0x7bc/0x8f0
start_secondary_prolog+0x10/0x14
or on the worker thread handling the unplug:
pseries-hotplug-cpu: Attempting to remove CPU <NULL>, drc index: 1000013a
Querying DEAD? cpu 314 (314) shows 2
BUG: Bad page state in process kworker/u768:3 pfn:95de1
cpu 314 (hwid 314) Ready to die...
page:c00a000002577840 refcount:0 mapcount:-128 mapping:0000000000000000 index:0x0
flags: 0x5ffffc00000000()
raw: 005ffffc00000000 5deadbeef0000100 5deadbeef0000200 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffff7f 0000000000000000
page dumped because: nonzero mapcount
Modules linked in: kvm xt_CHECKSUM ipt_MASQUERADE xt_conntrack ...
CPU: 0 PID: 548 Comm: kworker/u768:3 Kdump: loaded Not tainted 4.18.0-224.el8.bz1856588.ppc64le #1
Workqueue: pseries hotplug workque pseries_hp_work_fn
Call Trace:
dump_stack+0xb0/0xf4 (unreliable)
bad_page+0x12c/0x1b0
free_pcppages_bulk+0x5bc/0x940
page_alloc_cpu_dead+0x118/0x120
cpuhp_invoke_callback.constprop.5+0xb8/0x760
_cpu_down+0x188/0x340
cpu_down+0x5c/0xa0
cpu_subsys_offline+0x24/0x40
device_offline+0xf0/0x130
dlpar_offline_cpu+0x1c4/0x2a0
dlpar_cpu_remove+0xb8/0x190
dlpar_cpu_remove_by_index+0x12c/0x150
dlpar_cpu+0x94/0x800
pseries_hp_work_fn+0x128/0x1e0
process_one_work+0x304/0x5d0
worker_thread+0xcc/0x7a0
kthread+0x1ac/0x1c0
ret_from_kernel_thread+0x5c/0x80
The latter trace is due to the following sequence:
page_alloc_cpu_dead
drain_pages
drain_pages_zone
free_pcppages_bulk
where drain_pages() in this case is called under the assumption that
the unplugged cpu is no longer executing. To ensure that is the case,
and early call is made to __cpu_die()->pseries_cpu_die(), which runs a
loop that waits for the cpu to reach a halted state by polling its
status via query-cpu-stopped-state RTAS calls. It only polls for 25
iterations before giving up, however, and in the trace above this
results in the following being printed only .1 seconds after the
hotplug worker thread begins processing the unplug request:
pseries-hotplug-cpu: Attempting to remove CPU <NULL>, drc index: 1000013a
Querying DEAD? cpu 314 (314) shows 2
At that point the worker thread assumes the unplugged CPU is in some
unknown/dead state and procedes with the cleanup, causing the race
with the XIVE cleanup code executed by the unplugged CPU.
Fix this by waiting indefinitely, but also making an effort to avoid
spurious lockup messages by allowing for rescheduling after polling
the CPU status and printing a warning if we wait for longer than 120s.
Fixes:
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Christophe Leroy
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7bee31ad8e |
powerpc/32s: Fix is_module_segment() when MODULES_VADDR is defined
When MODULES_VADDR is defined, is_module_segment() shall check the
address against it instead of checking agains VMALLOC_START.
Fixes:
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Christophe Leroy
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48d2f0407b |
powerpc/kasan: Fix KASAN_SHADOW_START on BOOK3S_32
On BOOK3S_32, when we have modules and strict kernel RWX, modules
are not in vmalloc space but in a dedicated segment that is
below PAGE_OFFSET.
So KASAN_SHADOW_START must take it into account.
MODULES_VADDR can't be used because it is not defined yet
in kasan.h
Fixes:
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Christophe Leroy
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fdc6edbb31 |
powerpc/fixmap: Fix the size of the early debug area
Commit ("03fd42d458fb powerpc/fixmap: Fix FIX_EARLY_DEBUG_BASE when
page size is 256k") reworked the setup of the early debug area and
mistakenly replaced 128 * 1024 by SZ_128.
Change to SZ_128K to restore the original 128 kbytes size of the area.
Fixes:
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Aneesh Kumar K.V
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1e4e4bcaf7 |
powerpc/pkeys: Fix build error with PPC_MEM_KEYS disabled
IS_ENABLED() instead of #ifdef still requires variable declaration.
In this specific case, default_uamor is declared in asm/pkeys.h which
is only included if PPC_MEM_KEYS is enabled.
arch/powerpc/mm/book3s64/hash_utils.c: In function ‘hash__early_init_mmu_secondary’:
arch/powerpc/mm/book3s64/hash_utils.c:1119:21: error: ‘default_uamor’ undeclared (first use in this function)
1119 | mtspr(SPRN_UAMOR, default_uamor);
| ^~~~~~~~~~~~~
Fixes:
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Madhavan Srinivasan
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388692e943 |
powerpc/kernel: Cleanup machine check function declarations
__machine_check_early_realmode_p*() are currently declared as extern
in cputable.c and because of this when compiled with "C=1" (which
enables semantic checker) produces these warnings.
CHECK arch/powerpc/kernel/mce_power.c
arch/powerpc/kernel/mce_power.c:709:6: warning: symbol '__machine_check_early_realmode_p7' was not declared. Should it be static?
arch/powerpc/kernel/mce_power.c:717:6: warning: symbol '__machine_check_early_realmode_p8' was not declared. Should it be static?
arch/powerpc/kernel/mce_power.c:722:6: warning: symbol '__machine_check_early_realmode_p9' was not declared. Should it be static?
arch/powerpc/kernel/mce_power.c:740:6: warning: symbol '__machine_check_early_realmode_p10' was not declared. Should it be static?
Patch here moves the declaration to asm/mce.h and includes the same in
cputable.c
Fixes:
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Madhavan Srinivasan
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327da008e6 |
powerpc: Add POWER10 raw mode cputable entry
Add a raw mode cputable entry for POWER10. Copies most of the fields from commit |
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Athira Rajeev
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d735599a06 |
powerpc/perf: Add extended regs support for power10 platform
Include capability flag PERF_PMU_CAP_EXTENDED_REGS for power10 and expose MMCR3, SIER2, SIER3 registers as part of extended regs. Also introduce PERF_REG_PMU_MASK_31 to define extended mask value at runtime for power10. Suggested-by: Ryan Grimm <grimm@linux.ibm.com> Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com> Tested-by: Nageswara R Sastry <nasastry@in.ibm.com> Reviewed-by: Kajol Jain <kjain@linux.ibm.com> Reviewed-and-tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/1596794701-23530-3-git-send-email-atrajeev@linux.vnet.ibm.com |
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Anju T Sudhakar
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781fa4811d |
powerpc/perf: Add support for outputting extended regs in perf intr_regs
Add support for perf extended register capability in powerpc. The capability flag PERF_PMU_CAP_EXTENDED_REGS, is used to indicate the PMU which support extended registers. The generic code define the mask of extended registers as 0 for non supported architectures. Patch adds extended regs support for power9 platform by exposing MMCR0, MMCR1 and MMCR2 registers. REG_RESERVED mask needs update to include extended regs. PERF_REG_EXTENDED_MASK, contains mask value of the supported registers, is defined at runtime in the kernel based on platform since the supported registers may differ from one processor version to another and hence the MASK value. With the patch: available registers: r0 r1 r2 r3 r4 r5 r6 r7 r8 r9 r10 r11 r12 r13 r14 r15 r16 r17 r18 r19 r20 r21 r22 r23 r24 r25 r26 r27 r28 r29 r30 r31 nip msr orig_r3 ctr link xer ccr softe trap dar dsisr sier mmcra mmcr0 mmcr1 mmcr2 PERF_RECORD_SAMPLE(IP, 0x1): 4784/4784: 0 period: 1 addr: 0 ... intr regs: mask 0xffffffffffff ABI 64-bit .... r0 0xc00000000012b77c .... r1 0xc000003fe5e03930 .... r2 0xc000000001b0e000 .... r3 0xc000003fdcddf800 .... r4 0xc000003fc7880000 .... r5 0x9c422724be .... r6 0xc000003fe5e03908 .... r7 0xffffff63bddc8706 .... r8 0x9e4 .... r9 0x0 .... r10 0x1 .... r11 0x0 .... r12 0xc0000000001299c0 .... r13 0xc000003ffffc4800 .... r14 0x0 .... r15 0x7fffdd8b8b00 .... r16 0x0 .... r17 0x7fffdd8be6b8 .... r18 0x7e7076607730 .... r19 0x2f .... r20 0xc00000001fc26c68 .... r21 0xc0002041e4227e00 .... r22 0xc00000002018fb60 .... r23 0x1 .... r24 0xc000003ffec4d900 .... r25 0x80000000 .... r26 0x0 .... r27 0x1 .... r28 0x1 .... r29 0xc000000001be1260 .... r30 0x6008010 .... r31 0xc000003ffebb7218 .... nip 0xc00000000012b910 .... msr 0x9000000000009033 .... orig_r3 0xc00000000012b86c .... ctr 0xc0000000001299c0 .... link 0xc00000000012b77c .... xer 0x0 .... ccr 0x28002222 .... softe 0x1 .... trap 0xf00 .... dar 0x0 .... dsisr 0x80000000000 .... sier 0x0 .... mmcra 0x80000000000 .... mmcr0 0x82008090 .... mmcr1 0x1e000000 .... mmcr2 0x0 ... thread: perf:4784 Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com> Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com> Tested-by: Nageswara R Sastry <nasastry@in.ibm.com> Reviewed-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Reviewed-by: Kajol Jain <kjain@linux.ibm.com> Reviewed-and-tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/1596794701-23530-2-git-send-email-atrajeev@linux.vnet.ibm.com |
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Michael Neuling
|
030a2c689f |
powerpc: Fix P10 PVR revision in /proc/cpuinfo for SMT4 cores
On POWER10 bit 12 in the PVR indicates if the core is SMT4 or SMT8.
Bit 12 is set for SMT4.
Without this patch, /proc/cpuinfo on a SMT4 DD1 POWER10 looks like
this:
cpu : POWER10, altivec supported
revision : 17.0 (pvr 0080 1100)
Fixes:
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Krzysztof Kozlowski
|
8f28ca6bd8 |
iomap: constify ioreadX() iomem argument (as in generic implementation)
Patch series "iomap: Constify ioreadX() iomem argument", v3. The ioread8/16/32() and others have inconsistent interface among the architectures: some taking address as const, some not. It seems there is nothing really stopping all of them to take pointer to const. This patch (of 4): The ioreadX() and ioreadX_rep() helpers have inconsistent interface. On some architectures void *__iomem address argument is a pointer to const, on some not. Implementations of ioreadX() do not modify the memory under the address so they can be converted to a "const" version for const-safety and consistency among architectures. [krzk@kernel.org: sh: clk: fix assignment from incompatible pointer type for ioreadX()] Link: http://lkml.kernel.org/r/20200723082017.24053-1-krzk@kernel.org [akpm@linux-foundation.org: fix drivers/mailbox/bcm-pdc-mailbox.c] Link: http://lkml.kernel.org/r/202007132209.Rxmv4QyS%25lkp@intel.com Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Helge Deller <deller@gmx.de> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Cc: Kalle Valo <kvalo@codeaurora.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Jon Mason <jdmason@kudzu.us> Cc: Allen Hubbe <allenbh@gmail.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Link: http://lkml.kernel.org/r/20200709072837.5869-1-krzk@kernel.org Link: http://lkml.kernel.org/r/20200709072837.5869-2-krzk@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Xiaoming Ni
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88db0aa242 |
all arch: remove system call sys_sysctl
Since commit
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Linus Torvalds
|
7fca4dee61 |
powerpc fixes for 5.9 #2
One fix for a boot crash on some platforms introduced by the recent pkey refactoring. Thanks to: Christian Zigotzky, Aneesh Kumar K.V. -----BEGIN PGP SIGNATURE----- iQJHBAABCAAxFiEEJFGtCPCthwEv2Y/bUevqPMjhpYAFAl82hVUTHG1wZUBlbGxl cm1hbi5pZC5hdQAKCRBR6+o8yOGlgI5GEACaEJDAJimcb7zqMJ7dQZR1hr5CoU50 r7LIa0BTDDwP4gTfj+CrCp3XCZvTHeYFoYKMgQ2TU9qW/viF6DrXAoufLPQ8Ftyf sFSHvA7olz1ztPwAVLM4HkF61BsMCvrqMCRoDe3NRTWyLD7Ufs4dtiV1GtrjMSZt vQtXs0OWXhNas9hPnt4GR9ZgTSQQxp/VsgiwkhpLsW8dVUXQ12kcHjjKgD6qmXy3 LXdK5NNvHKZ632shwIHHOp0gMd016AqwZAIKGtSD7A8ZRRVMX8StQw8W+pPKRCSA dksHtOUrM4reDx7B00Ce84rNkr2r+gOSzzOyIhnhcMbxhLj6lyb4PkXsCS1D+lB0 c0IbAti7IJaPOIDVG+sjpMR7IetyAtGLRioLMeOcyQmd+C27DEy/NbUzl1yJF8LK htR0XvJNmBgJ3QPhyWw3NpcdLMYsnGZ6rJdHp0XnrXn9ngR1zb8xQU8BdaP/DtKd xeAwNBeiQ7EPeEWv67KXJUJYsEKSKSjZNdUyY6W8m9/qwOHrUrvbBnYzuVD1e4eE ELB1GF5DO10EeYdqFEhhnGUJIwjA7M3SU30LI5DO9x8ikiMCRoI0vLgT4eWU+aTe aRVYfQ750ZlYEGvDhvWKlpcvgRcdtT2rgnqrysyjkJ9bf24/prXa0MSfhwvPipXA A4gY681C1/2IOA== =d4vU -----END PGP SIGNATURE----- Merge tag 'powerpc-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fix from Michael Ellerman: "One fix for a boot crash on some platforms introduced by the recent pkey refactoring. Thanks to Christian Zigotzky and Aneesh Kumar K.V" * tag 'powerpc-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/pkeys: Fix boot failures with Nemo board (A-EON AmigaOne X1000) |
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Linus Torvalds
|
8cd84b7096 |
PPC:
* Improvements and bugfixes for secure VM support, giving reduced startup
time and memory hotplug support.
* Locking fixes in nested KVM code
* Increase number of guests supported by HV KVM to 4094
* Preliminary POWER10 support
ARM:
* Split the VHE and nVHE hypervisor code bases, build the EL2 code
separately, allowing for the VHE code to now be built with instrumentation
* Level-based TLB invalidation support
* Restructure of the vcpu register storage to accomodate the NV code
* Pointer Authentication available for guests on nVHE hosts
* Simplification of the system register table parsing
* MMU cleanups and fixes
* A number of post-32bit cleanups and other fixes
MIPS:
* compilation fixes
x86:
* bugfixes
* support for the SERIALIZE instruction
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull more KVM updates from Paolo Bonzini:
"PPC:
- Improvements and bugfixes for secure VM support, giving reduced
startup time and memory hotplug support.
- Locking fixes in nested KVM code
- Increase number of guests supported by HV KVM to 4094
- Preliminary POWER10 support
ARM:
- Split the VHE and nVHE hypervisor code bases, build the EL2 code
separately, allowing for the VHE code to now be built with
instrumentation
- Level-based TLB invalidation support
- Restructure of the vcpu register storage to accomodate the NV code
- Pointer Authentication available for guests on nVHE hosts
- Simplification of the system register table parsing
- MMU cleanups and fixes
- A number of post-32bit cleanups and other fixes
MIPS:
- compilation fixes
x86:
- bugfixes
- support for the SERIALIZE instruction"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (70 commits)
KVM: MIPS/VZ: Fix build error caused by 'kvm_run' cleanup
x86/kvm/hyper-v: Synic default SCONTROL MSR needs to be enabled
MIPS: KVM: Convert a fallthrough comment to fallthrough
MIPS: VZ: Only include loongson_regs.h for CPU_LOONGSON64
x86: Expose SERIALIZE for supported cpuid
KVM: x86: Don't attempt to load PDPTRs when 64-bit mode is enabled
KVM: arm64: Move S1PTW S2 fault logic out of io_mem_abort()
KVM: arm64: Don't skip cache maintenance for read-only memslots
KVM: arm64: Handle data and instruction external aborts the same way
KVM: arm64: Rename kvm_vcpu_dabt_isextabt()
KVM: arm: Add trace name for ARM_NISV
KVM: arm64: Ensure that all nVHE hyp code is in .hyp.text
KVM: arm64: Substitute RANDOMIZE_BASE for HARDEN_EL2_VECTORS
KVM: arm64: Make nVHE ASLR conditional on RANDOMIZE_BASE
KVM: PPC: Book3S HV: Rework secure mem slot dropping
KVM: PPC: Book3S HV: Move kvmppc_svm_page_out up
KVM: PPC: Book3S HV: Migrate hot plugged memory
KVM: PPC: Book3S HV: In H_SVM_INIT_DONE, migrate remaining normal-GFNs to secure-GFNs
KVM: PPC: Book3S HV: Track the state GFNs associated with secure VMs
KVM: PPC: Book3S HV: Disable page merging in H_SVM_INIT_START
...
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Linus Torvalds
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9ad57f6dfc |
Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton: - most of the rest of MM (memcg, hugetlb, vmscan, proc, compaction, mempolicy, oom-kill, hugetlbfs, migration, thp, cma, util, memory-hotplug, cleanups, uaccess, migration, gup, pagemap), - various other subsystems (alpha, misc, sparse, bitmap, lib, bitops, checkpatch, autofs, minix, nilfs, ufs, fat, signals, kmod, coredump, exec, kdump, rapidio, panic, kcov, kgdb, ipc). * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (164 commits) mm/gup: remove task_struct pointer for all gup code mm: clean up the last pieces of page fault accountings mm/xtensa: use general page fault accounting mm/x86: use general page fault accounting mm/sparc64: use general page fault accounting mm/sparc32: use general page fault accounting mm/sh: use general page fault accounting mm/s390: use general page fault accounting mm/riscv: use general page fault accounting mm/powerpc: use general page fault accounting mm/parisc: use general page fault accounting mm/openrisc: use general page fault accounting mm/nios2: use general page fault accounting mm/nds32: use general page fault accounting mm/mips: use general page fault accounting mm/microblaze: use general page fault accounting mm/m68k: use general page fault accounting mm/ia64: use general page fault accounting mm/hexagon: use general page fault accounting mm/csky: use general page fault accounting ... |
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Peter Xu
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a2beb5f1ef |
mm: clean up the last pieces of page fault accountings
Here're the last pieces of page fault accounting that were still done
outside handle_mm_fault() where we still have regs==NULL when calling
handle_mm_fault():
arch/powerpc/mm/copro_fault.c: copro_handle_mm_fault
arch/sparc/mm/fault_32.c: force_user_fault
arch/um/kernel/trap.c: handle_page_fault
mm/gup.c: faultin_page
fixup_user_fault
mm/hmm.c: hmm_vma_fault
mm/ksm.c: break_ksm
Some of them has the issue of duplicated accounting for page fault
retries. Some of them didn't do the accounting at all.
This patch cleans all these up by letting handle_mm_fault() to do per-task
page fault accounting even if regs==NULL (though we'll still skip the perf
event accountings). With that, we can safely remove all the outliers now.
There's another functional change in that now we account the page faults
to the caller of gup, rather than the task_struct that passed into the gup
code. More information of this can be found at [1].
After this patch, below things should never be touched again outside
handle_mm_fault():
- task_struct.[maj|min]_flt
- PERF_COUNT_SW_PAGE_FAULTS_[MAJ|MIN]
[1] https://lore.kernel.org/lkml/CAHk-=wj_V2Tps2QrMn20_W0OJF9xqNh52XSGA42s-ZJ8Y+GyKw@mail.gmail.com/
Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Cain <bcain@codeaurora.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Guo Ren <guoren@kernel.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: James E.J. Bottomley <James.Bottomley@HansenPartnership.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/20200707225021.200906-25-peterx@redhat.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Peter Xu
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428fdc0944 |
mm/powerpc: use general page fault accounting
Use the general page fault accounting by passing regs into handle_mm_fault(). Signed-off-by: Peter Xu <peterx@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Link: http://lkml.kernel.org/r/20200707225021.200906-17-peterx@redhat.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Peter Xu
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bce617edec |
mm: do page fault accounting in handle_mm_fault
Patch series "mm: Page fault accounting cleanups", v5.
This is v5 of the pf accounting cleanup series. It originates from Gerald
Schaefer's report on an issue a week ago regarding to incorrect page fault
accountings for retried page fault after commit
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Christoph Hellwig
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428e2976a5 |
uaccess: remove segment_eq
segment_eq is only used to implement uaccess_kernel. Just open code uaccess_kernel in the arch uaccess headers and remove one layer of indirection. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Acked-by: Greentime Hu <green.hu@gmail.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Nick Hu <nickhu@andestech.com> Cc: Vincent Chen <deanbo422@gmail.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Link: http://lkml.kernel.org/r/20200710135706.537715-5-hch@lst.de Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Linus Torvalds
|
952ace797c |
IOMMU Updates for Linux v5.9
Including:
- Removal of the dev->archdata.iommu (or similar) pointers from
most architectures. Only Sparc is left, but this is private to
Sparc as their drivers don't use the IOMMU-API.
- ARM-SMMU Updates from Will Deacon:
- Support for SMMU-500 implementation in Marvell
Armada-AP806 SoC
- Support for SMMU-500 implementation in NVIDIA Tegra194 SoC
- DT compatible string updates
- Remove unused IOMMU_SYS_CACHE_ONLY flag
- Move ARM-SMMU drivers into their own subdirectory
- Intel VT-d Updates from Lu Baolu:
- Misc tweaks and fixes for vSVA
- Report/response page request events
- Cleanups
- Move the Kconfig and Makefile bits for the AMD and Intel
drivers into their respective subdirectory.
- MT6779 IOMMU Support
- Support for new chipsets in the Renesas IOMMU driver
- Other misc cleanups and fixes (e.g. to improve compile test
coverage)
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Merge tag 'iommu-updates-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull iommu updates from Joerg Roedel:
- Remove of the dev->archdata.iommu (or similar) pointers from most
architectures. Only Sparc is left, but this is private to Sparc as
their drivers don't use the IOMMU-API.
- ARM-SMMU updates from Will Deacon:
- Support for SMMU-500 implementation in Marvell Armada-AP806 SoC
- Support for SMMU-500 implementation in NVIDIA Tegra194 SoC
- DT compatible string updates
- Remove unused IOMMU_SYS_CACHE_ONLY flag
- Move ARM-SMMU drivers into their own subdirectory
- Intel VT-d updates from Lu Baolu:
- Misc tweaks and fixes for vSVA
- Report/response page request events
- Cleanups
- Move the Kconfig and Makefile bits for the AMD and Intel drivers into
their respective subdirectory.
- MT6779 IOMMU Support
- Support for new chipsets in the Renesas IOMMU driver
- Other misc cleanups and fixes (e.g. to improve compile test coverage)
* tag 'iommu-updates-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (77 commits)
iommu/amd: Move Kconfig and Makefile bits down into amd directory
iommu/vt-d: Move Kconfig and Makefile bits down into intel directory
iommu/arm-smmu: Move Arm SMMU drivers into their own subdirectory
iommu/vt-d: Skip TE disabling on quirky gfx dedicated iommu
iommu: Add gfp parameter to io_pgtable_ops->map()
iommu: Mark __iommu_map_sg() as static
iommu/vt-d: Rename intel-pasid.h to pasid.h
iommu/vt-d: Add page response ops support
iommu/vt-d: Report page request faults for guest SVA
iommu/vt-d: Add a helper to get svm and sdev for pasid
iommu/vt-d: Refactor device_to_iommu() helper
iommu/vt-d: Disable multiple GPASID-dev bind
iommu/vt-d: Warn on out-of-range invalidation address
iommu/vt-d: Fix devTLB flush for vSVA
iommu/vt-d: Handle non-page aligned address
iommu/vt-d: Fix PASID devTLB invalidation
iommu/vt-d: Remove global page support in devTLB flush
iommu/vt-d: Enforce PASID devTLB field mask
iommu: Make some functions static
iommu/amd: Remove double zero check
...
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Aneesh Kumar K.V
|
6553fb799f |
powerpc/pkeys: Fix boot failures with Nemo board (A-EON AmigaOne X1000)
On p6 and before we should avoid updating UAMOR SPRN. This resulted
in boot failure on Nemo board.
Fixes:
|
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|
Linus Torvalds
|
fc80c51fd4 |
Kbuild updates for v5.9
- run the checker (e.g. sparse) after the compiler - remove unneeded cc-option tests for old compiler flags - fix tar-pkg to install dtbs - introduce ccflags-remove-y and asflags-remove-y syntax - allow to trace functions in sub-directories of lib/ - introduce hostprogs-always-y and userprogs-always-y syntax - various Makefile cleanups -----BEGIN PGP SIGNATURE----- iQJJBAABCgAzFiEEbmPs18K1szRHjPqEPYsBB53g2wYFAl8wJXEVHG1hc2FoaXJv eUBrZXJuZWwub3JnAAoJED2LAQed4NsGMGEP/0jDq/WafbfPN0aU83EqEWLt/sKg bluzmf/6HGx3XVRnuAzsHNNqysUx77WJiDsU/jbC/zdH8Iox3Sc1diE2sELLNAfY iJmQ8NBPggyU74aYG3OJdpDjz8T9EX/nVaYrjyFlbuXElM+Qvo8Z4Fz6NpWqKWlA gU+yGxEPPdX6MLHcSPSIu1hGWx7UT4fgfx3zDFTI2qvbQgQjKtzyTjAH5Cm3o87h rfomvHSSoAUg+Fh1LediRh1tJlkdVO+w7c+LNwCswmdBtkZuxecj1bQGUTS8GaLl CCWOKYfWp0KsVf1veXNNNaX/ecbp+Y34WErFq3V9Fdq5RmVlp+FPSGMyjDMRiQ/p LGvzbJLPpG586MnK8of0dOj6Es6tVPuq6WH2HuvsyTGcZJDpFTTxRcK3HDkE8ig6 ZtuM3owB/Mep8IzwY2yWQiDrc7TX5Fz8S4hzGPU1zG9cfj4VT6TBqHGAy1Eql/0l txj6vJpnbQSdXiIX8MIU3yH35Y7eW3JYWgspTZH5Woj1S/wAWwuG93Fuuxq6mQIJ q6LSkMavtOfuCjOA9vJBZewpKXRU6yo0CzWNL/5EZ6z/r/I+DGtfb/qka8oYUDjX 9H0cecL37AQxDHRPTxCZDQF0TpYiFJ6bmnMftK9NKNuIdvsk9DF7UBa3EdUNIj38 yKS3rI7Lw55xWuY3 =bkNQ -----END PGP SIGNATURE----- Merge tag 'kbuild-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - run the checker (e.g. sparse) after the compiler - remove unneeded cc-option tests for old compiler flags - fix tar-pkg to install dtbs - introduce ccflags-remove-y and asflags-remove-y syntax - allow to trace functions in sub-directories of lib/ - introduce hostprogs-always-y and userprogs-always-y syntax - various Makefile cleanups * tag 'kbuild-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kbuild: stop filtering out $(GCC_PLUGINS_CFLAGS) from cc-option base kbuild: include scripts/Makefile.* only when relevant CONFIG is enabled kbuild: introduce hostprogs-always-y and userprogs-always-y kbuild: sort hostprogs before passing it to ifneq kbuild: move host .so build rules to scripts/gcc-plugins/Makefile kbuild: Replace HTTP links with HTTPS ones kbuild: trace functions in subdirectories of lib/ kbuild: introduce ccflags-remove-y and asflags-remove-y kbuild: do not export LDFLAGS_vmlinux kbuild: always create directories of targets powerpc/boot: add DTB to 'targets' kbuild: buildtar: add dtbs support kbuild: remove cc-option test of -ffreestanding kbuild: remove cc-option test of -fno-stack-protector Revert "kbuild: Create directory for target DTB" kbuild: run the checker after the compiler |
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Paolo Bonzini
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3ff0327899 |
PPC KVM update for 5.9
- Improvements and bug-fixes for secure VM support, giving reduced startup time and memory hotplug support. - Locking fixes in nested KVM code - Increase number of guests supported by HV KVM to 4094 - Preliminary POWER10 support -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAABCAAGBQJfH7NMAAoJEJ2a6ncsY3GfkZoH/1be9wpKse2wTke3UcgqGnuX WkOXMqvTG/1goHIuPKm0QP9O3RU3m2EnXqGJjkg71zVYierzMONhJblfU4XDdk2E FbD2tjNEGuQGNXp8mrHFuwAB6zRQTQevsxsIPYU7KDZ8wKavSAKtayJNEfAf2inI YB49Vj8N5djmH3Y+T41XsKx8ut4n1o82MTQsuiHwbtZt1GVO9N7OXW4SZvYbu18v CUp3GIkiFU+VVQv+9a1a1c0w7DendNGL2mNF18tQohwV+NOFv0wsP4ZOONBE8c70 myo9SAuxpOZfeENxk7Cw323kZ2095e/6IDSUeQ91xp/FYmq6YTXmAvc//MKKaow= =Lnvu -----END PGP SIGNATURE----- Merge tag 'kvm-ppc-next-5.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into kvm-next-5.6 PPC KVM update for 5.9 - Improvements and bug-fixes for secure VM support, giving reduced startup time and memory hotplug support. - Locking fixes in nested KVM code - Increase number of guests supported by HV KVM to 4094 - Preliminary POWER10 support |