search for: early_ioremap

...mp; ~PAGE_MASK)) panic("set_pte_phys: cannot allocate page data %s\n", after_bootmem?"after bootmem":""); @@ -436,17 +441,34 @@ static inline int make_readonly(unsigned return readonly; } +#ifndef CONFIG_XEN /* Must run before zap_low_mappings */ __init void *early_ioremap(unsigned long addr, unsigned long size) { - return ioremap(addr, size); + unsigned long map = round_down(addr, LARGE_PAGE_SIZE); + + /* actually usually some more */ + if (size >= LARGE_PAGE_SIZE) { + printk("SMBIOS area too long %lu\n", size); + return NULL; + } + set_pmd(temp_mapp...

Change Makefile so vsmp_64.o object is dependent on PARAVIRT, rather than X86_VSMP Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ravikiran Thirumalai <kiran@scalemp.com> Acked-by: Shai Fultheim <shai@scalemp.com> --- arch/x86/kernel/Makefile | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/x86/kernel/Makefile

...f5e 100644 --- a/arch/powerpc/include/asm/Kbuild +++ b/arch/powerpc/include/asm/Kbuild @@ -6,5 +6,7 @@ generated-y += syscall_table_spu.h generic-y += export.h generic-y += local64.h generic-y += mcs_spinlock.h +generic-y += qrwlock.h +generic-y += qspinlock.h generic-y += vtime.h generic-y += early_ioremap.h diff --git a/arch/powerpc/include/asm/qspinlock.h b/arch/powerpc/include/asm/qspinlock.h new file mode 100644 index 000000000000..f84da77b6bb7 --- /dev/null +++ b/arch/powerpc/include/asm/qspinlock.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_POWERPC_QSPINLOCK_H +#defi...

...f5e 100644 --- a/arch/powerpc/include/asm/Kbuild +++ b/arch/powerpc/include/asm/Kbuild @@ -6,5 +6,7 @@ generated-y += syscall_table_spu.h generic-y += export.h generic-y += local64.h generic-y += mcs_spinlock.h +generic-y += qrwlock.h +generic-y += qspinlock.h generic-y += vtime.h generic-y += early_ioremap.h diff --git a/arch/powerpc/include/asm/qspinlock.h b/arch/powerpc/include/asm/qspinlock.h new file mode 100644 index 000000000000..c49e33e24edd --- /dev/null +++ b/arch/powerpc/include/asm/qspinlock.h @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_POWERPC_QSPINLOCK_H +#defi...

...printk and early_panic. Changes in v6: - rebased on 77d3a1db3196b1b5864469f8d3f41d496800c795; - remove useless initializations to NULL in lfb_init; - more compact checks in lfb_init. Changes in v5: - move the barriers outside the loop in flush_xen_data_tlb_range_va; - move out of "introduce early_ioremap" any changes related to flush_xen_data_tlb_range_va and PAGE masks; - remove lfb_alloc and the now unused __initdata variables; - fix indentation and long lines; - reword commit message of "move setup_mm right after setup_pagetables"; - turn printk in setup_mm into an early_printk in...

v2 is updated to account for feedback from Will, Peter, and Waiman (thank you), and trims off a couple of RFC and unrelated patches. Thanks, Nick Nicholas Piggin (6): powerpc/powernv: must include hvcall.h to get PAPR defines powerpc/pseries: move some PAPR paravirt functions to their own file powerpc: move spinlock implementation to simple_spinlock powerpc/64s: implement queued

Updated with everybody's feedback (thanks all), and more performance results. What I've found is I might have been measuring the worst load point for the paravirt case, and by looking at a range of loads it's clear that queued spinlocks are overall better even on PV, doubly so when you look at the generally much improved worst case latencies. I have defaulted it to N even though

This series adds an option to use queued spinlocks for powerpc, and makes it the default for the Book3S-64 subarch. This effort starts with the generic code so it's very simple but still very performant. There are optimisations that can be made to slowpaths, but I think it's better to attack those incrementally if/when we find things, and try to add the improvements to generic code as

v3 is updated to use __pv_queued_spin_unlock, noticed by Waiman (thank you). Thanks, Nick Nicholas Piggin (6): powerpc/powernv: must include hvcall.h to get PAPR defines powerpc/pseries: move some PAPR paravirt functions to their own file powerpc: move spinlock implementation to simple_spinlock powerpc/64s: implement queued spinlocks and rwlocks powerpc/pseries: implement paravirt

v3 is updated to use __pv_queued_spin_unlock, noticed by Waiman (thank you). Thanks, Nick Nicholas Piggin (6): powerpc/powernv: must include hvcall.h to get PAPR defines powerpc/pseries: move some PAPR paravirt functions to their own file powerpc: move spinlock implementation to simple_spinlock powerpc/64s: implement queued spinlocks and rwlocks powerpc/pseries: implement paravirt

...ooping forever on bad ACPI tables */ if (entry_header->length == 0) { - printk(KERN_WARNING PREFIX - "Invalid 0-length structure\n"); + pr_warn("Invalid 0-length structure\n"); return 0; } @@ -664,7 +653,8 @@ int __init check_zero_address(void) addr = early_ioremap(drhd->address, VTD_PAGE_SIZE); if (!addr ) { - printk("IOMMU: can't validate: %llx\n", drhd->address); + pr_err("IOMMU: can't validate: %llx\n", + drhd->address); goto failed; } cap = dmar_readq(addr + DMAR_CAP_REG); @@ -701,9 +6...

...ooping forever on bad ACPI tables */ if (entry_header->length == 0) { - printk(KERN_WARNING PREFIX - "Invalid 0-length structure\n"); + pr_warn("Invalid 0-length structure\n"); return 0; } @@ -664,7 +653,8 @@ int __init check_zero_address(void) addr = early_ioremap(drhd->address, VTD_PAGE_SIZE); if (!addr ) { - printk("IOMMU: can't validate: %llx\n", drhd->address); + pr_err("IOMMU: can't validate: %llx\n", + drhd->address); goto failed; } cap = dmar_readq(addr + DMAR_CAP_REG); @@ -701,9 +6...

...ooping forever on bad ACPI tables */ if (entry_header->length == 0) { - printk(KERN_WARNING PREFIX - "Invalid 0-length structure\n"); + pr_warn("Invalid 0-length structure\n"); return 0; } @@ -664,7 +653,8 @@ int __init check_zero_address(void) addr = early_ioremap(drhd->address, VTD_PAGE_SIZE); if (!addr ) { - printk("IOMMU: can't validate: %llx\n", drhd->address); + pr_err("IOMMU: can't validate: %llx\n", + drhd->address); goto failed; } cap = dmar_readq(addr + DMAR_CAP_REG); @@ -701,9 +6...

This round implements all of the review comments from V2 and all patches are now acked. Unless there are any objections I intend to apply later this morning. Ian.