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author | Al Viro <viro@zeniv.linux.org.uk> | 2016-10-11 03:02:51 (GMT) |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2016-10-11 03:02:51 (GMT) |
commit | 3873691e5ab34fa26948643d038a2b98c4437298 (patch) | |
tree | 5327469194c2167830bce38b56a618b754cdbeea /arch/powerpc | |
parent | c2050a454c7f123d7a57fa1d76ff61bd43643abb (diff) | |
parent | aadfa8019e8114539cfa0b1eb2e5a9c83094a590 (diff) | |
download | linux-3873691e5ab34fa26948643d038a2b98c4437298.tar.xz |
Merge remote-tracking branch 'ovl/rename2' into for-linus
Diffstat (limited to 'arch/powerpc')
-rw-r--r-- | arch/powerpc/include/asm/cpu_has_feature.h | 2 | ||||
-rw-r--r-- | arch/powerpc/include/asm/uaccess.h | 23 | ||||
-rw-r--r-- | arch/powerpc/kernel/idle_book3s.S | 10 | ||||
-rw-r--r-- | arch/powerpc/platforms/powernv/pci-ioda.c | 37 |
4 files changed, 40 insertions, 32 deletions
diff --git a/arch/powerpc/include/asm/cpu_has_feature.h b/arch/powerpc/include/asm/cpu_has_feature.h index 2ef55f8..b312b15 100644 --- a/arch/powerpc/include/asm/cpu_has_feature.h +++ b/arch/powerpc/include/asm/cpu_has_feature.h @@ -15,7 +15,7 @@ static inline bool early_cpu_has_feature(unsigned long feature) #ifdef CONFIG_JUMP_LABEL_FEATURE_CHECKS #include <linux/jump_label.h> -#define NUM_CPU_FTR_KEYS 64 +#define NUM_CPU_FTR_KEYS BITS_PER_LONG extern struct static_key_true cpu_feature_keys[NUM_CPU_FTR_KEYS]; diff --git a/arch/powerpc/include/asm/uaccess.h b/arch/powerpc/include/asm/uaccess.h index f1e3824..c266227 100644 --- a/arch/powerpc/include/asm/uaccess.h +++ b/arch/powerpc/include/asm/uaccess.h @@ -308,36 +308,21 @@ extern unsigned long __copy_tofrom_user(void __user *to, static inline unsigned long copy_from_user(void *to, const void __user *from, unsigned long n) { - unsigned long over; - - if (access_ok(VERIFY_READ, from, n)) { + if (likely(access_ok(VERIFY_READ, from, n))) { check_object_size(to, n, false); return __copy_tofrom_user((__force void __user *)to, from, n); } - if ((unsigned long)from < TASK_SIZE) { - over = (unsigned long)from + n - TASK_SIZE; - check_object_size(to, n - over, false); - return __copy_tofrom_user((__force void __user *)to, from, - n - over) + over; - } + memset(to, 0, n); return n; } static inline unsigned long copy_to_user(void __user *to, const void *from, unsigned long n) { - unsigned long over; - if (access_ok(VERIFY_WRITE, to, n)) { check_object_size(from, n, true); return __copy_tofrom_user(to, (__force void __user *)from, n); } - if ((unsigned long)to < TASK_SIZE) { - over = (unsigned long)to + n - TASK_SIZE; - check_object_size(from, n - over, true); - return __copy_tofrom_user(to, (__force void __user *)from, - n - over) + over; - } return n; } @@ -434,10 +419,6 @@ static inline unsigned long clear_user(void __user *addr, unsigned long size) might_fault(); if (likely(access_ok(VERIFY_WRITE, addr, size))) return __clear_user(addr, size); - if ((unsigned long)addr < TASK_SIZE) { - unsigned long over = (unsigned long)addr + size - TASK_SIZE; - return __clear_user(addr, size - over) + over; - } return size; } diff --git a/arch/powerpc/kernel/idle_book3s.S b/arch/powerpc/kernel/idle_book3s.S index 2265c63..bd739fe 100644 --- a/arch/powerpc/kernel/idle_book3s.S +++ b/arch/powerpc/kernel/idle_book3s.S @@ -411,7 +411,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300) * * r13 - PACA * cr3 - gt if waking up with partial/complete hypervisor state loss - * cr4 - eq if waking up from complete hypervisor state loss. + * cr4 - gt or eq if waking up from complete hypervisor state loss. */ _GLOBAL(pnv_wakeup_tb_loss) ld r1,PACAR1(r13) @@ -453,7 +453,7 @@ lwarx_loop2: * At this stage * cr2 - eq if first thread to wakeup in core * cr3- gt if waking up with partial/complete hypervisor state loss - * cr4 - eq if waking up from complete hypervisor state loss. + * cr4 - gt or eq if waking up from complete hypervisor state loss. */ ori r15,r15,PNV_CORE_IDLE_LOCK_BIT @@ -481,7 +481,7 @@ first_thread_in_subcore: * If waking up from sleep, subcore state is not lost. Hence * skip subcore state restore */ - bne cr4,subcore_state_restored + blt cr4,subcore_state_restored /* Restore per-subcore state */ ld r4,_SDR1(r1) @@ -526,7 +526,7 @@ timebase_resync: * If waking up from sleep, per core state is not lost, skip to * clear_lock. */ - bne cr4,clear_lock + blt cr4,clear_lock /* * First thread in the core to wake up and its waking up with @@ -557,7 +557,7 @@ common_exit: * If waking up from sleep, hypervisor state is not lost. Hence * skip hypervisor state restore. */ - bne cr4,hypervisor_state_restored + blt cr4,hypervisor_state_restored /* Waking up from winkle */ diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index c16d790..38a5c65 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -124,6 +124,13 @@ static inline bool pnv_pci_is_m64(struct pnv_phb *phb, struct resource *r) r->start < (phb->ioda.m64_base + phb->ioda.m64_size)); } +static inline bool pnv_pci_is_m64_flags(unsigned long resource_flags) +{ + unsigned long flags = (IORESOURCE_MEM_64 | IORESOURCE_PREFETCH); + + return (resource_flags & flags) == flags; +} + static struct pnv_ioda_pe *pnv_ioda_init_pe(struct pnv_phb *phb, int pe_no) { phb->ioda.pe_array[pe_no].phb = phb; @@ -2217,7 +2224,7 @@ static long pnv_pci_ioda2_set_window(struct iommu_table_group *table_group, pnv_pci_link_table_and_group(phb->hose->node, num, tbl, &pe->table_group); - pnv_pci_phb3_tce_invalidate_pe(pe); + pnv_pci_ioda2_tce_invalidate_pe(pe); return 0; } @@ -2355,7 +2362,7 @@ static long pnv_pci_ioda2_unset_window(struct iommu_table_group *table_group, if (ret) pe_warn(pe, "Unmapping failed, ret = %ld\n", ret); else - pnv_pci_phb3_tce_invalidate_pe(pe); + pnv_pci_ioda2_tce_invalidate_pe(pe); pnv_pci_unlink_table_and_group(table_group->tables[num], table_group); @@ -2871,7 +2878,7 @@ static void pnv_pci_ioda_fixup_iov_resources(struct pci_dev *pdev) res = &pdev->resource[i + PCI_IOV_RESOURCES]; if (!res->flags || res->parent) continue; - if (!pnv_pci_is_m64(phb, res)) { + if (!pnv_pci_is_m64_flags(res->flags)) { dev_warn(&pdev->dev, "Don't support SR-IOV with" " non M64 VF BAR%d: %pR. \n", i, res); @@ -3096,7 +3103,7 @@ static resource_size_t pnv_pci_window_alignment(struct pci_bus *bus, * alignment for any 64-bit resource, PCIe doesn't care and * bridges only do 64-bit prefetchable anyway. */ - if (phb->ioda.m64_segsize && (type & IORESOURCE_MEM_64)) + if (phb->ioda.m64_segsize && pnv_pci_is_m64_flags(type)) return phb->ioda.m64_segsize; if (type & IORESOURCE_MEM) return phb->ioda.m32_segsize; @@ -3426,7 +3433,17 @@ static void pnv_ioda_release_pe(struct pnv_ioda_pe *pe) } } - pnv_ioda_free_pe(pe); + /* + * The PE for root bus can be removed because of hotplug in EEH + * recovery for fenced PHB error. We need to mark the PE dead so + * that it can be populated again in PCI hot add path. The PE + * shouldn't be destroyed as it's the global reserved resource. + */ + if (phb->ioda.root_pe_populated && + phb->ioda.root_pe_idx == pe->pe_number) + phb->ioda.root_pe_populated = false; + else + pnv_ioda_free_pe(pe); } static void pnv_pci_release_device(struct pci_dev *pdev) @@ -3442,7 +3459,17 @@ static void pnv_pci_release_device(struct pci_dev *pdev) if (!pdn || pdn->pe_number == IODA_INVALID_PE) return; + /* + * PCI hotplug can happen as part of EEH error recovery. The @pdn + * isn't removed and added afterwards in this scenario. We should + * set the PE number in @pdn to an invalid one. Otherwise, the PE's + * device count is decreased on removing devices while failing to + * be increased on adding devices. It leads to unbalanced PE's device + * count and eventually make normal PCI hotplug path broken. + */ pe = &phb->ioda.pe_array[pdn->pe_number]; + pdn->pe_number = IODA_INVALID_PE; + WARN_ON(--pe->device_count < 0); if (pe->device_count == 0) pnv_ioda_release_pe(pe); |