- 31 Jan, 2021 22 commits
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Christophe Leroy authored
Powerpc 8xx requires CONSOLE_POLL to get udbg_putc() and udbg_getc() in CPM uart driver. Signed-off-by:
Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/3d10a274516e9be8c4b0dc679a2840cdc1588872.1608716197.git.christophe.leroy@csgroup.eu
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Christophe Leroy authored
Since commit 4ad8622d ("powerpc/8xx: Implement hw_breakpoint"), 8xx has breakpoints so there is no reason to opt breakpoint logic out of xmon for the 8xx. Fixes: 4ad8622d ("powerpc/8xx: Implement hw_breakpoint") Signed-off-by:
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Christophe Leroy authored
It is now possible to only build book3s/32 kernel for CPUs without hash table. Opt out hash related code when CONFIG_PPC_BOOK3S_604 is not selected. Signed-off-by:
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Markus Elfring authored
A bit of information should be put into a sequence. Thus improve the execution speed for this data output by better usage of corresponding functions. This issue was detected by using the Coccinelle software. Signed-off-by:
Markus Elfring <elfring@users.sourceforge.net> Signed-off-by:
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Markus Elfring authored
Adjust jump targets so that a bit of exception handling can be better reused at the end of this function. This issue was detected by using the Coccinelle software. Signed-off-by:
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Markus Elfring authored
A null pointer would be passed to a call of the function “of_node_put” immediately after a call of the function “of_find_compatible_node” failed at one place. Remove this superfluous function call. This issue was detected by using the Coccinelle software. Signed-off-by:
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Markus Elfring authored
Omit an extra message for a memory allocation failure in this function. Signed-off-by:
Nathan Lynch <nathanl@linux.ibm.com> Signed-off-by:
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Markus Elfring authored
A null pointer would be passed to a call of the function “kfree” immediately after a call of the function “kstrdup” failed at one place. Remove this superfluous function call. This issue was detected by using the Coccinelle software. Signed-off-by:
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Markus Elfring authored
A local variable was used only within an if branch. Thus move the definition for the variable “mm” into the corresponding code block. This issue was detected by using the Coccinelle software. Signed-off-by:
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Qian Cai authored
It is safe to traverse mm->context.iommu_group_mem_list with either mem_list_mutex or the RCU read lock held. Silence a few RCU-list false positive warnings and fix a few missing RCU read locks. arch/powerpc/mm/book3s64/iommu_api.c:330 RCU-list traversed in non-reader section!! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 2 locks held by qemu-kvm/4305: #0: c000000bc3fe4d68 (&container->lock){+.+.}-{3:3}, at: tce_iommu_ioctl.part.9+0xc7c/0x1870 [vfio_iommu_spapr_tce] #1: c000000001501910 (mem_list_mutex){+.+.}-{3:3}, at: mm_iommu_get+0x50/0x190 ==== arch/powerpc/mm/book3s64/iommu_api.c:132 RCU-list traversed in non-reader section!! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 2 locks held by qemu-kvm/4305: #0: c000000bc3fe4d68 (&container->lock){+.+.}-{3:3}, at: tce_iommu_ioctl.part.9+0xc7c/0x1870 [vfio_iommu_spapr_tce] #1: c000000001501910 (mem_list_mutex){+.+.}-{3:3}, at: mm_iommu_do_alloc+0x120/0x5f0 ==== arch/powerpc/mm/book3s64/iommu_api.c:292 RCU-list traversed in non-reader section!! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 2 locks held by qemu-kvm/4312: #0: c000000ecafe23c8 (&vcpu->mutex){+.+.}-{3:3}, at: kvm_vcpu_ioctl+0xdc/0x950 [kvm] #1: c000000045e6c468 (&kvm->srcu){....}-{0:0}, at: kvmppc_h_put_tce+0x88/0x340 [kvm] ==== arch/powerpc/mm/book3s64/iommu_api.c:424 RCU-list traversed in non-reader section!! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 2 locks held by qemu-kvm/4312: #0: c000000ecafe23c8 (&vcpu->mutex){+.+.}-{3:3}, at: kvm_vcpu_ioctl+0xdc/0x950 [kvm] #1: c000000045e6c468 (&kvm->srcu){....}-{0:0}, at: kvmppc_h_put_tce+0x88/0x340 [kvm] Signed-off-by:Qian Cai <cai@lca.pw> Signed-off-by:
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Qian Cai authored
It is unsafe to traverse tbl->it_group_list without the RCU read lock. WARNING: suspicious RCU usage 5.7.0-rc4-next-20200508 #1 Not tainted ----------------------------- arch/powerpc/platforms/powernv/pci-ioda-tce.c:355 RCU-list traversed in non-reader section!! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 3 locks held by qemu-kvm/4305: #0: c000000bc3fe6988 (&container->group_lock){++++}-{3:3}, at: vfio_fops_unl_ioctl+0x108/0x410 [vfio] #1: c00800000fcc7400 (&vfio.iommu_drivers_lock){+.+.}-{3:3}, at: vfio_fops_unl_ioctl+0x148/0x410 [vfio] #2: c000000bc3fe4d68 (&container->lock){+.+.}-{3:3}, at: tce_iommu_attach_group+0x3c/0x4f0 [vfio_iommu_spapr_tce] stack backtrace: CPU: 4 PID: 4305 Comm: qemu-kvm Not tainted 5.7.0-rc4-next-20200508 #1 Call Trace: [c0000010f29afa60] [c0000000007154c8] dump_stack+0xfc/0x174 (unreliable) [c0000010f29afab0] [c0000000001d8ff0] lockdep_rcu_suspicious+0x140/0x164 [c0000010f29afb30] [c0000000000dae2c] pnv_pci_unlink_table_and_group+0x11c/0x200 [c0000010f29afb70] [c0000000000d4a34] pnv_pci_ioda2_unset_window+0xc4/0x190 [c0000010f29afbf0] [c0000000000d4b4c] pnv_ioda2_take_ownership+0x4c/0xd0 [c0000010f29afc30] [c00800000fd60ee0] tce_iommu_attach_group+0x2c8/0x4f0 [vfio_iommu_spapr_tce] [c0000010f29afcd0] [c00800000fcc11a0] vfio_fops_unl_ioctl+0x238/0x410 [vfio] [c0000010f29afd50] [c0000000005430a8] ksys_ioctl+0xd8/0x130 [c0000010f29afda0] [c000000000543128] sys_ioctl+0x28/0x40 [c0000010f29afdc0] [c000000000038af4] system_call_exception+0x114/0x1e0 [c0000010f29afe20] [c00000000000c8f0] system_call_common+0xf0/0x278 Signed-off-by: -
Michal Suchanek authored
./arch/powerpc/include/asm/paravirt.h:83:44: error: implicit declaration of function 'smp_processor_id'; did you mean 'raw_smp_processor_id'? smp_processor_id is defined in linux/smp.h but it is not included. The build error happens only when the patch is applied to 5.3 kernel but it only works by chance in mainline. Fixes: ca3f969d ("powerpc/paravirt: Use is_kvm_guest() in vcpu_is_preempted()") Signed-off-by:
Michal Suchanek <msuchanek@suse.de> Signed-off-by:
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Ganesh Goudar authored
Access to per-cpu variables requires translation to be enabled on pseries machine running in hash mmu mode, Since part of MCE handler runs in realmode and part of MCE handling code is shared between ppc architectures pseries and powernv, it becomes difficult to manage these variables differently on different architectures, So have these variables in paca instead of having them as per-cpu variables to avoid complications. Signed-off-by:
Ganesh Goudar <ganeshgr@linux.ibm.com> Signed-off-by:
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Ganesh Goudar authored
Maximum recursive depth of MCE is 4, Considering the maximum depth allowed reduce the size of event to 10 from 100. This saves us ~19kB of memory and has no fatal consequences. Signed-off-by:
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Pingfan Liu authored
When CONFIG_IRQ_TIME_ACCOUNTING and CONFIG_VIRT_CPU_ACCOUNTING_GEN, powerpc does not enable "sched_clock_irqtime" and can not utilize irq time accounting. Like x86, powerpc does not use the sched_clock_register() interface. So it needs an dedicated call to enable_sched_clock_irqtime() to enable irq time accounting. Fixes: 518470fe ("powerpc: Add HAVE_IRQ_TIME_ACCOUNTING") Signed-off-by:
Pingfan Liu <kernelfans@gmail.com> [mpe: Add fixes tag] Signed-off-by:
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Cédric Le Goater authored
The "ibm,arch-vec-5-platform-support" property is a list of pairs of bytes representing the options and values supported by the platform firmware. At boot time, Linux scans this list and activates the available features it recognizes : Radix and XIVE. A recent change modified the number of entries to loop on and 8 bytes, 4 pairs of { options, values } entries are always scanned. This is fine on KVM but not on PowerVM which can advertises less. As a consequence on this platform, Linux reads extra entries pointing to random data, interprets these as available features and tries to activate them, leading to a firmware crash in ibm,client-architecture-support. Fix that by using the property length of "ibm,arch-vec-5-platform-support". Fixes: ab912399 ("powerpc/prom: Remove VLA in prom_check_platform_support()") Cc: stable@vger.kernel.org # v4.20+ Signed-off-by:Cédric Le Goater <clg@kaod.org> Reviewed-by:
Fabiano Rosas <farosas@linux.ibm.com> Signed-off-by:
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Oliver O'Halloran authored
Nothing uses it. Signed-off-by:
Oliver O'Halloran <oohall@gmail.com> Signed-off-by:
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Oliver O'Halloran authored
If a PCI device's current driver implements the error handling callbacks EEH can use them to recover the device after an error occurs. For devices without the error handling callbacks we recover them by removing the device and re-scanning it so the PCI core puts the device back into a known good state. Currently there's no way for userspace to determine if the driver supports recovery or not which makes it difficult to write automated tests for EEH. This patch addressing that by adding a debugfs interface for querying if a specific device can be recovered or not. Signed-off-by:
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Oliver O'Halloran authored
Pull the string -> pci_dev lookup stuff into a helper function. No functional change. Signed-off-by:
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Oliver O'Halloran authored
The basic EEH test ignores VFs since we the way the eeh_dev_break debugfs interface works means that if multiple VFs are enabled we may cause errors on all them them. However, we can work around that by only enabling a single VF at a time. This patch adds some infrastructure for finding SR-IOV capable devices and enabling / disabling VFs so we can exercise the VF specific EEH recovery paths. Two new tests are added, one for testing EEH aware devices and one for EEH un-aware VFs. Signed-off-by:
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Oliver O'Halloran authored
We want to use stdout to return lists of devices, etc so log debug / status messages to stderr rather than stdout. Signed-off-by:
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Oliver O'Halloran authored
Hoist some of the useful test environment checking and prep code into eeh-functions.sh so they can be reused in other tests. Signed-off-by:
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- 30 Jan, 2021 18 commits
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Ananth N Mavinakayanahalli authored
We currently just percolate the return value from analyze_instr() to the caller of emulate_step(), especially if it is a -1. For one particular case (opcode = 4) for instructions that aren't currently emulated, we are returning 'should not be single-stepped' while we should have returned 0 which says 'did not emulate, may have to single-step'. Fixes: 930d6288 ("powerpc: sstep: Add support for maddhd, maddhdu, maddld instructions") Signed-off-by:
Ananth N Mavinakayanahalli <ananth@linux.ibm.com> Suggested-by:
Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Reviewed-by:
Sandipan Das <sandipan@linux.ibm.com> Signed-off-by:
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Ananth N Mavinakayanahalli authored
We currently unconditionally try to emulate newer instructions on older Power versions that could cause issues. Gate it. Fixes: 350779a2 ("powerpc: Handle most loads and stores in instruction emulation code") Signed-off-by:
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Christophe Leroy authored
STDBINUTILS is just a toggle to allow 256k page size to appear in the possible page sizes list for the 44x. Make 256k page size option appear all the time with an explicit warning about binutils, and remove this unnecessary STDBINUTILS config option. Signed-off-by:
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Christophe Leroy authored
PPC47x_TLBE_SIZE isn't defined for 256k pages, leading to a build break if 256k pages is selected. So change the kconfig so that 256k pages can't be selected for 47x. Fixes: e7f75ad0 ("powerpc/47x: Base ppc476 support") Reported-by:
kernel test robot <lkp@intel.com> Signed-off-by:
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Christophe Leroy authored
book3s/32 kvm is designed with the assumption that an FPU is always present. Force selection of FPU support in the kernel when build KVM. Fixes: 7d68c891 ("powerpc/32s: Allow deselecting CONFIG_PPC_FPU on mpc832x") Reported-by:
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Nicholas Piggin authored
Queued spinlocks have shown to have good performance and fairness properties even on smaller (2 socket) POWER systems. This selects them automatically for 64s. For other platforms they are de-selected, the standard spinlock is far simpler and smaller code, and single chips with a handful of cores is unlikely to show any improvement. CONFIG_EXPERT still allows this to be changed, e.g., to help debug performance or correctness issues. Signed-off-by:
Nicholas Piggin <npiggin@gmail.com> Signed-off-by:
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Cédric Le Goater authored
The VAS device allocates a generic interrupt to handle page faults but the IRQ name doesn't show under /proc. This is because it's on stack. Allocate the name. Signed-off-by:
Haren Myneni <haren@linux.ibm.com> Signed-off-by:
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Alexey Kardashevskiy authored
This adds a folder per LIOBN under /sys/kernel/debug/iommu with IOMMU table parameters. This is enabled by CONFIG_IOMMU_DEBUGFS. Signed-off-by:
Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by:
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Cédric Le Goater authored
Only used locally. It fixes this W=1 compile error : ../arch/powerpc/platforms/pseries/eeh_pseries.c:697:5: error: no previous prototype for ‘pseries_send_allow_unfreeze’ [-Werror=missing-prototypes] 697 | int pseries_send_allow_unfreeze(struct pci_dn *pdn, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ Signed-off-by: -
Cédric Le Goater authored
These are only used locally. It fixes these W=1 compile errors : ../arch/powerpc/platforms/pseries/pci.c:58:5: error: no previous prototype for ‘pseries_send_map_pe’ [-Werror=missing-prototypes] 58 | int pseries_send_map_pe(struct pci_dev *pdev, | ^~~~~~~~~~~~~~~~~~~ ../arch/powerpc/platforms/pseries/pci.c:91:6: error: no previous prototype for ‘pseries_set_pe_num’ [-Werror=missing-prototypes] 91 | void pseries_set_pe_num(struct pci_dev *pdev, u16 vf_index, __be16 pe_num) | ^~~~~~~~~~~~~~~~~~ ../arch/powerpc/platforms/pseries/pci.c:105:5: error: no previous prototype for ‘pseries_associate_pes’ [-Werror=missing-prototypes] 105 | int pseries_associate_pes(struct pci_dev *pdev, u16 num_vfs) | ^~~~~~~~~~~~~~~~~~~~~ ../arch/powerpc/platforms/pseries/pci.c:149:5: error: no previous prototype for ‘pseries_pci_sriov_enable’ [-Werror=missing-prototypes] 149 | int pseries_pci_sriov_enable(struct pci_dev *pdev, u16 num_vfs) | ^~~~~~~~~~~~~~~~~~~~~~~~ ../arch/powerpc/platforms/pseries/pci.c:192:5: error: no previous prototype for ‘pseries_pcibios_sriov_enable’ [-Werror=missing-prototypes] 192 | int pseries_pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ ../arch/powerpc/platforms/pseries/pci.c:199:5: error: no previous prototype for ‘pseries_pcibios_sriov_disable’ [-Werror=missing-prototypes] 199 | int pseries_pcibios_sriov_disable(struct pci_dev *pdev) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Signed-off-by: -
Cédric Le Goater authored
These are only used locally. It fixes these W=1 compile errors : ../arch/powerpc/platforms/pseries/setup.c:610:17: error: no previous prototype for ‘pseries_get_iov_fw_value’ [-Werror=missing-prototypes] 610 | resource_size_t pseries_get_iov_fw_value(struct pci_dev *dev, int resno, | ^~~~~~~~~~~~~~~~~~~~~~~~ ../arch/powerpc/platforms/pseries/setup.c:646:6: error: no previous prototype for ‘of_pci_set_vf_bar_size’ [-Werror=missing-prototypes] 646 | void of_pci_set_vf_bar_size(struct pci_dev *dev, const int *indexes) | ^~~~~~~~~~~~~~~~~~~~~~ ../arch/powerpc/platforms/pseries/setup.c:668:6: error: no previous prototype for ‘of_pci_parse_iov_addrs’ [-Werror=missing-prototypes] 668 | void of_pci_parse_iov_addrs(struct pci_dev *dev, const int *indexes) | ^~~~~~~~~~~~~~~~~~~~~~ Signed-off-by: -
Cédric Le Goater authored
This fixes these W=1 compile errors: ../arch/powerpc/kvm/book3s_hv_builtin.c:425:6: error: no previous prototype for ‘kvmppc_read_intr’ [-Werror=missing-prototypes] 425 | long kvmppc_read_intr(void) | ^~~~~~~~~~~~~~~~ ../arch/powerpc/kvm/book3s_hv_builtin.c:652:6: error: no previous prototype for ‘kvmppc_bad_interrupt’ [-Werror=missing-prototypes] 652 | void kvmppc_bad_interrupt(struct pt_regs *regs) | ^~~~~~~~~~~~~~~~~~~~ ../arch/powerpc/kvm/book3s_hv_builtin.c:695:6: error: no previous prototype for ‘kvmhv_p9_set_lpcr’ [-Werror=missing-prototypes] 695 | void kvmhv_p9_set_lpcr(struct kvm_split_mode *sip) | ^~~~~~~~~~~~~~~~~ ../arch/powerpc/kvm/book3s_hv_builtin.c:740:6: error: no previous prototype for ‘kvmhv_p9_restore_lpcr’ [-Werror=missing-prototypes] 740 | void kvmhv_p9_restore_lpcr(struct kvm_split_mode *sip) | ^~~~~~~~~~~~~~~~~~~~~ ../arch/powerpc/kvm/book3s_hv_builtin.c:768:6: error: no previous prototype for ‘kvmppc_set_msr_hv’ [-Werror=missing-prototypes] 768 | void kvmppc_set_msr_hv(struct kvm_vcpu *vcpu, u64 msr) | ^~~~~~~~~~~~~~~~~ ../arch/powerpc/kvm/book3s_hv_builtin.c:817:6: error: no previous prototype for ‘kvmppc_inject_interrupt_hv’ [-Werror=missing-prototypes] 817 | void kvmppc_inject_interrupt_hv(struct kvm_vcpu *vcpu, int vec, u64 srr1_flags) Signed-off-by: -
Cédric Le Goater authored
It fixes these W=1 compile errors : CC [M] arch/powerpc/kvm/book3s_64_mmu_hv.o ../arch/powerpc/kvm/book3s_64_mmu_hv.c:879:5: error: no previous prototype for ‘kvm_unmap_hva_range_hv’ [-Werror=missing-prototypes] 879 | int kvm_unmap_hva_range_hv(struct kvm *kvm, unsigned long start, unsigned long end) | ^~~~~~~~~~~~~~~~~~~~~~ ../arch/powerpc/kvm/book3s_64_mmu_hv.c:888:6: error: no previous prototype for ‘kvmppc_core_flush_memslot_hv’ [-Werror=missing-prototypes] 888 | void kvmppc_core_flush_memslot_hv(struct kvm *kvm, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ ../arch/powerpc/kvm/book3s_64_mmu_hv.c:970:5: error: no previous prototype for ‘kvm_age_hva_hv’ [-Werror=missing-prototypes] 970 | int kvm_age_hva_hv(struct kvm *kvm, unsigned long start, unsigned long end) | ^~~~~~~~~~~~~~ ../arch/powerpc/kvm/book3s_64_mmu_hv.c:1011:5: error: no previous prototype for ‘kvm_test_age_hva_hv’ [-Werror=missing-prototypes] 1011 | int kvm_test_age_hva_hv(struct kvm *kvm, unsigned long hva) | ^~~~~~~~~~~~~~~~~~~ ../arch/powerpc/kvm/book3s_64_mmu_hv.c:1019:6: error: no previous prototype for ‘kvm_set_spte_hva_hv’ [-Werror=missing-prototypes] 1019 | void kvm_set_spte_hva_hv(struct kvm *kvm, unsigned long hva, pte_t pte) | ^~~~~~~~~~~~~~~~~~~ Signed-off-by: -
Cédric Le Goater authored
These are only used locally. It fixes these W=1 compile errors : ../arch/powerpc/kvm/powerpc.c:1521:5: error: no previous prototype for ‘kvmppc_get_vmx_dword’ [-Werror=missing-prototypes] 1521 | int kvmppc_get_vmx_dword(struct kvm_vcpu *vcpu, int index, u64 *val) | ^~~~~~~~~~~~~~~~~~~~ ../arch/powerpc/kvm/powerpc.c:1539:5: error: no previous prototype for ‘kvmppc_get_vmx_word’ [-Werror=missing-prototypes] 1539 | int kvmppc_get_vmx_word(struct kvm_vcpu *vcpu, int index, u64 *val) | ^~~~~~~~~~~~~~~~~~~ ../arch/powerpc/kvm/powerpc.c:1557:5: error: no previous prototype for ‘kvmppc_get_vmx_hword’ [-Werror=missing-prototypes] 1557 | int kvmppc_get_vmx_hword(struct kvm_vcpu *vcpu, int index, u64 *val) | ^~~~~~~~~~~~~~~~~~~~ ../arch/powerpc/kvm/powerpc.c:1575:5: error: no previous prototype for ‘kvmppc_get_vmx_byte’ [-Werror=missing-prototypes] 1575 | int kvmppc_get_vmx_byte(struct kvm_vcpu *vcpu, int index, u64 *val) | ^~~~~~~~~~~~~~~~~~~ Fixes: acc9eb93 ("KVM: PPC: Reimplement LOAD_VMX/STORE_VMX instruction mmio emulation with analyse_instr() input") Signed-off-by: -
Cédric Le Goater authored
soft_nmi_interrupt() usage requires PPC_WATCHDOG to be configured. Check the CONFIG definition to declare the prototype. It fixes this W=1 compile error : ../arch/powerpc/kernel/watchdog.c:250:6: error: no previous prototype for ‘soft_nmi_interrupt’ [-Werror=missing-prototypes] 250 | void soft_nmi_interrupt(struct pt_regs *regs) | ^~~~~~~~~~~~~~~~~~ Signed-off-by: -
Cédric Le Goater authored
It fixes this W=1 compile error : ../arch/powerpc/mm/book3s64/pgtable.c:411:6: error: no previous prototype for ‘arch_report_meminfo’ [-Werror=missing-prototypes] 411 | void arch_report_meminfo(struct seq_file *m) | ^~~~~~~~~~~~~~~~~~~ Signed-off-by: -
Cédric Le Goater authored
pseries_alloc_bootmem_huge_page() is only used locally in alloc_bootmem_huge_page() and does not need to be external. It fixes this W=1 compile error : ../arch/powerpc/mm/hugetlbpage.c:220:12: error: no previous prototype for ‘pseries_alloc_bootmem_huge_page’ [-Werror=missing-prototypes] 220 | int __init pseries_alloc_bootmem_huge_page(struct hstate *hstate) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Signed-off-by: -
Cédric Le Goater authored
It fixes this W=1 compile error : ../arch/powerpc/mm/book3s64/slb.c:380:6: error: no previous prototype for ‘preload_new_slb_context’ [-Werror=missing-prototypes] 380 | void preload_new_slb_context(unsigned long start, unsigned long sp) | ^~~~~~~~~~~~~~~~~~~~~~~ Signed-off-by:
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