mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-24 12:15:35 +07:00
97a32539b9
The most notable change is DEFINE_SHOW_ATTRIBUTE macro split in seq_file.h. Conversion rule is: llseek => proc_lseek unlocked_ioctl => proc_ioctl xxx => proc_xxx delete ".owner = THIS_MODULE" line [akpm@linux-foundation.org: fix drivers/isdn/capi/kcapi_proc.c] [sfr@canb.auug.org.au: fix kernel/sched/psi.c] Link: http://lkml.kernel.org/r/20200122180545.36222f50@canb.auug.org.au Link: http://lkml.kernel.org/r/20191225172546.GB13378@avx2 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020 lines
50 KiB
C
2020 lines
50 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* pSeries_lpar.c
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* Copyright (C) 2001 Todd Inglett, IBM Corporation
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*
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* pSeries LPAR support.
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*/
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/* Enables debugging of low-level hash table routines - careful! */
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#undef DEBUG
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#define pr_fmt(fmt) "lpar: " fmt
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#include <linux/kernel.h>
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#include <linux/dma-mapping.h>
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#include <linux/console.h>
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#include <linux/export.h>
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#include <linux/jump_label.h>
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#include <linux/delay.h>
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#include <linux/stop_machine.h>
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#include <linux/spinlock.h>
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#include <linux/cpuhotplug.h>
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#include <linux/workqueue.h>
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#include <linux/proc_fs.h>
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#include <asm/processor.h>
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#include <asm/mmu.h>
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#include <asm/page.h>
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#include <asm/pgtable.h>
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#include <asm/machdep.h>
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#include <asm/mmu_context.h>
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#include <asm/iommu.h>
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#include <asm/tlb.h>
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#include <asm/prom.h>
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#include <asm/cputable.h>
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#include <asm/udbg.h>
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#include <asm/smp.h>
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#include <asm/trace.h>
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#include <asm/firmware.h>
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#include <asm/plpar_wrappers.h>
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#include <asm/kexec.h>
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#include <asm/fadump.h>
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#include <asm/asm-prototypes.h>
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#include <asm/debugfs.h>
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#include "pseries.h"
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/* Flag bits for H_BULK_REMOVE */
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#define HBR_REQUEST 0x4000000000000000UL
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#define HBR_RESPONSE 0x8000000000000000UL
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#define HBR_END 0xc000000000000000UL
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#define HBR_AVPN 0x0200000000000000UL
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#define HBR_ANDCOND 0x0100000000000000UL
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/* in hvCall.S */
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EXPORT_SYMBOL(plpar_hcall);
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EXPORT_SYMBOL(plpar_hcall9);
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EXPORT_SYMBOL(plpar_hcall_norets);
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/*
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* H_BLOCK_REMOVE supported block size for this page size in segment who's base
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* page size is that page size.
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*
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* The first index is the segment base page size, the second one is the actual
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* page size.
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*/
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static int hblkrm_size[MMU_PAGE_COUNT][MMU_PAGE_COUNT] __ro_after_init;
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/*
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* Due to the involved complexity, and that the current hypervisor is only
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* returning this value or 0, we are limiting the support of the H_BLOCK_REMOVE
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* buffer size to 8 size block.
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*/
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#define HBLKRM_SUPPORTED_BLOCK_SIZE 8
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#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
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static u8 dtl_mask = DTL_LOG_PREEMPT;
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#else
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static u8 dtl_mask;
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#endif
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void alloc_dtl_buffers(unsigned long *time_limit)
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{
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int cpu;
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struct paca_struct *pp;
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struct dtl_entry *dtl;
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for_each_possible_cpu(cpu) {
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pp = paca_ptrs[cpu];
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if (pp->dispatch_log)
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continue;
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dtl = kmem_cache_alloc(dtl_cache, GFP_KERNEL);
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if (!dtl) {
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pr_warn("Failed to allocate dispatch trace log for cpu %d\n",
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cpu);
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#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
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pr_warn("Stolen time statistics will be unreliable\n");
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#endif
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break;
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}
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pp->dtl_ridx = 0;
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pp->dispatch_log = dtl;
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pp->dispatch_log_end = dtl + N_DISPATCH_LOG;
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pp->dtl_curr = dtl;
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if (time_limit && time_after(jiffies, *time_limit)) {
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cond_resched();
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*time_limit = jiffies + HZ;
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}
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}
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}
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void register_dtl_buffer(int cpu)
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{
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long ret;
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struct paca_struct *pp;
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struct dtl_entry *dtl;
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int hwcpu = get_hard_smp_processor_id(cpu);
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pp = paca_ptrs[cpu];
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dtl = pp->dispatch_log;
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if (dtl && dtl_mask) {
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pp->dtl_ridx = 0;
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pp->dtl_curr = dtl;
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lppaca_of(cpu).dtl_idx = 0;
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/* hypervisor reads buffer length from this field */
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dtl->enqueue_to_dispatch_time = cpu_to_be32(DISPATCH_LOG_BYTES);
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ret = register_dtl(hwcpu, __pa(dtl));
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if (ret)
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pr_err("WARNING: DTL registration of cpu %d (hw %d) failed with %ld\n",
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cpu, hwcpu, ret);
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lppaca_of(cpu).dtl_enable_mask = dtl_mask;
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}
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}
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#ifdef CONFIG_PPC_SPLPAR
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struct dtl_worker {
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struct delayed_work work;
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int cpu;
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};
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struct vcpu_dispatch_data {
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int last_disp_cpu;
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int total_disp;
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int same_cpu_disp;
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int same_chip_disp;
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int diff_chip_disp;
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int far_chip_disp;
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int numa_home_disp;
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int numa_remote_disp;
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int numa_far_disp;
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};
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/*
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* This represents the number of cpus in the hypervisor. Since there is no
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* architected way to discover the number of processors in the host, we
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* provision for dealing with NR_CPUS. This is currently 2048 by default, and
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* is sufficient for our purposes. This will need to be tweaked if
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* CONFIG_NR_CPUS is changed.
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*/
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#define NR_CPUS_H NR_CPUS
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DEFINE_RWLOCK(dtl_access_lock);
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static DEFINE_PER_CPU(struct vcpu_dispatch_data, vcpu_disp_data);
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static DEFINE_PER_CPU(u64, dtl_entry_ridx);
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static DEFINE_PER_CPU(struct dtl_worker, dtl_workers);
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static enum cpuhp_state dtl_worker_state;
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static DEFINE_MUTEX(dtl_enable_mutex);
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static int vcpudispatch_stats_on __read_mostly;
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static int vcpudispatch_stats_freq = 50;
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static __be32 *vcpu_associativity, *pcpu_associativity;
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static void free_dtl_buffers(unsigned long *time_limit)
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{
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#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
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int cpu;
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struct paca_struct *pp;
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for_each_possible_cpu(cpu) {
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pp = paca_ptrs[cpu];
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if (!pp->dispatch_log)
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continue;
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kmem_cache_free(dtl_cache, pp->dispatch_log);
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pp->dtl_ridx = 0;
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pp->dispatch_log = 0;
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pp->dispatch_log_end = 0;
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pp->dtl_curr = 0;
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if (time_limit && time_after(jiffies, *time_limit)) {
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cond_resched();
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*time_limit = jiffies + HZ;
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}
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}
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#endif
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}
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static int init_cpu_associativity(void)
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{
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vcpu_associativity = kcalloc(num_possible_cpus() / threads_per_core,
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VPHN_ASSOC_BUFSIZE * sizeof(__be32), GFP_KERNEL);
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pcpu_associativity = kcalloc(NR_CPUS_H / threads_per_core,
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VPHN_ASSOC_BUFSIZE * sizeof(__be32), GFP_KERNEL);
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if (!vcpu_associativity || !pcpu_associativity) {
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pr_err("error allocating memory for associativity information\n");
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return -ENOMEM;
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}
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return 0;
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}
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static void destroy_cpu_associativity(void)
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{
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kfree(vcpu_associativity);
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kfree(pcpu_associativity);
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vcpu_associativity = pcpu_associativity = 0;
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}
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static __be32 *__get_cpu_associativity(int cpu, __be32 *cpu_assoc, int flag)
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{
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__be32 *assoc;
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int rc = 0;
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assoc = &cpu_assoc[(int)(cpu / threads_per_core) * VPHN_ASSOC_BUFSIZE];
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if (!assoc[0]) {
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rc = hcall_vphn(cpu, flag, &assoc[0]);
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if (rc)
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return NULL;
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}
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return assoc;
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}
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static __be32 *get_pcpu_associativity(int cpu)
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{
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return __get_cpu_associativity(cpu, pcpu_associativity, VPHN_FLAG_PCPU);
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}
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static __be32 *get_vcpu_associativity(int cpu)
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{
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return __get_cpu_associativity(cpu, vcpu_associativity, VPHN_FLAG_VCPU);
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}
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static int cpu_relative_dispatch_distance(int last_disp_cpu, int cur_disp_cpu)
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{
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__be32 *last_disp_cpu_assoc, *cur_disp_cpu_assoc;
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if (last_disp_cpu >= NR_CPUS_H || cur_disp_cpu >= NR_CPUS_H)
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return -EINVAL;
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last_disp_cpu_assoc = get_pcpu_associativity(last_disp_cpu);
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cur_disp_cpu_assoc = get_pcpu_associativity(cur_disp_cpu);
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if (!last_disp_cpu_assoc || !cur_disp_cpu_assoc)
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return -EIO;
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return cpu_distance(last_disp_cpu_assoc, cur_disp_cpu_assoc);
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}
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static int cpu_home_node_dispatch_distance(int disp_cpu)
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{
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__be32 *disp_cpu_assoc, *vcpu_assoc;
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int vcpu_id = smp_processor_id();
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if (disp_cpu >= NR_CPUS_H) {
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pr_debug_ratelimited("vcpu dispatch cpu %d > %d\n",
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disp_cpu, NR_CPUS_H);
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return -EINVAL;
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}
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disp_cpu_assoc = get_pcpu_associativity(disp_cpu);
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vcpu_assoc = get_vcpu_associativity(vcpu_id);
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if (!disp_cpu_assoc || !vcpu_assoc)
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return -EIO;
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return cpu_distance(disp_cpu_assoc, vcpu_assoc);
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}
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static void update_vcpu_disp_stat(int disp_cpu)
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{
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struct vcpu_dispatch_data *disp;
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int distance;
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disp = this_cpu_ptr(&vcpu_disp_data);
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if (disp->last_disp_cpu == -1) {
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disp->last_disp_cpu = disp_cpu;
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return;
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}
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disp->total_disp++;
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if (disp->last_disp_cpu == disp_cpu ||
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(cpu_first_thread_sibling(disp->last_disp_cpu) ==
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cpu_first_thread_sibling(disp_cpu)))
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disp->same_cpu_disp++;
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else {
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distance = cpu_relative_dispatch_distance(disp->last_disp_cpu,
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disp_cpu);
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if (distance < 0)
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pr_debug_ratelimited("vcpudispatch_stats: cpu %d: error determining associativity\n",
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smp_processor_id());
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else {
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switch (distance) {
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case 0:
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disp->same_chip_disp++;
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break;
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case 1:
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disp->diff_chip_disp++;
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break;
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case 2:
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disp->far_chip_disp++;
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break;
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default:
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pr_debug_ratelimited("vcpudispatch_stats: cpu %d (%d -> %d): unexpected relative dispatch distance %d\n",
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smp_processor_id(),
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disp->last_disp_cpu,
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disp_cpu,
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distance);
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}
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}
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}
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distance = cpu_home_node_dispatch_distance(disp_cpu);
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if (distance < 0)
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pr_debug_ratelimited("vcpudispatch_stats: cpu %d: error determining associativity\n",
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smp_processor_id());
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else {
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switch (distance) {
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case 0:
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disp->numa_home_disp++;
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break;
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case 1:
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disp->numa_remote_disp++;
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break;
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case 2:
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disp->numa_far_disp++;
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break;
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default:
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pr_debug_ratelimited("vcpudispatch_stats: cpu %d on %d: unexpected numa dispatch distance %d\n",
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smp_processor_id(),
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disp_cpu,
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distance);
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}
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}
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disp->last_disp_cpu = disp_cpu;
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}
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static void process_dtl_buffer(struct work_struct *work)
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{
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struct dtl_entry dtle;
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u64 i = __this_cpu_read(dtl_entry_ridx);
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struct dtl_entry *dtl = local_paca->dispatch_log + (i % N_DISPATCH_LOG);
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struct dtl_entry *dtl_end = local_paca->dispatch_log_end;
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struct lppaca *vpa = local_paca->lppaca_ptr;
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struct dtl_worker *d = container_of(work, struct dtl_worker, work.work);
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if (!local_paca->dispatch_log)
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return;
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/* if we have been migrated away, we cancel ourself */
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if (d->cpu != smp_processor_id()) {
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pr_debug("vcpudispatch_stats: cpu %d worker migrated -- canceling worker\n",
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smp_processor_id());
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return;
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}
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if (i == be64_to_cpu(vpa->dtl_idx))
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goto out;
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while (i < be64_to_cpu(vpa->dtl_idx)) {
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dtle = *dtl;
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barrier();
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if (i + N_DISPATCH_LOG < be64_to_cpu(vpa->dtl_idx)) {
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/* buffer has overflowed */
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pr_debug_ratelimited("vcpudispatch_stats: cpu %d lost %lld DTL samples\n",
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d->cpu,
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be64_to_cpu(vpa->dtl_idx) - N_DISPATCH_LOG - i);
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i = be64_to_cpu(vpa->dtl_idx) - N_DISPATCH_LOG;
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dtl = local_paca->dispatch_log + (i % N_DISPATCH_LOG);
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continue;
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}
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update_vcpu_disp_stat(be16_to_cpu(dtle.processor_id));
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++i;
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++dtl;
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if (dtl == dtl_end)
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dtl = local_paca->dispatch_log;
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}
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__this_cpu_write(dtl_entry_ridx, i);
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out:
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schedule_delayed_work_on(d->cpu, to_delayed_work(work),
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HZ / vcpudispatch_stats_freq);
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}
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static int dtl_worker_online(unsigned int cpu)
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{
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struct dtl_worker *d = &per_cpu(dtl_workers, cpu);
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memset(d, 0, sizeof(*d));
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INIT_DELAYED_WORK(&d->work, process_dtl_buffer);
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d->cpu = cpu;
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#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
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per_cpu(dtl_entry_ridx, cpu) = 0;
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register_dtl_buffer(cpu);
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#else
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per_cpu(dtl_entry_ridx, cpu) = be64_to_cpu(lppaca_of(cpu).dtl_idx);
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#endif
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schedule_delayed_work_on(cpu, &d->work, HZ / vcpudispatch_stats_freq);
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return 0;
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}
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static int dtl_worker_offline(unsigned int cpu)
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{
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struct dtl_worker *d = &per_cpu(dtl_workers, cpu);
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cancel_delayed_work_sync(&d->work);
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#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
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unregister_dtl(get_hard_smp_processor_id(cpu));
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#endif
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return 0;
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}
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static void set_global_dtl_mask(u8 mask)
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{
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int cpu;
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dtl_mask = mask;
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for_each_present_cpu(cpu)
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lppaca_of(cpu).dtl_enable_mask = dtl_mask;
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}
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static void reset_global_dtl_mask(void)
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{
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int cpu;
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#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
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dtl_mask = DTL_LOG_PREEMPT;
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#else
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dtl_mask = 0;
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#endif
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for_each_present_cpu(cpu)
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lppaca_of(cpu).dtl_enable_mask = dtl_mask;
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}
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static int dtl_worker_enable(unsigned long *time_limit)
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{
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int rc = 0, state;
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if (!write_trylock(&dtl_access_lock)) {
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rc = -EBUSY;
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goto out;
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}
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set_global_dtl_mask(DTL_LOG_ALL);
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/* Setup dtl buffers and register those */
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alloc_dtl_buffers(time_limit);
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state = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "powerpc/dtl:online",
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dtl_worker_online, dtl_worker_offline);
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if (state < 0) {
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pr_err("vcpudispatch_stats: unable to setup workqueue for DTL processing\n");
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free_dtl_buffers(time_limit);
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reset_global_dtl_mask();
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write_unlock(&dtl_access_lock);
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rc = -EINVAL;
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goto out;
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}
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dtl_worker_state = state;
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out:
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return rc;
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}
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static void dtl_worker_disable(unsigned long *time_limit)
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{
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cpuhp_remove_state(dtl_worker_state);
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|
free_dtl_buffers(time_limit);
|
|
reset_global_dtl_mask();
|
|
write_unlock(&dtl_access_lock);
|
|
}
|
|
|
|
static ssize_t vcpudispatch_stats_write(struct file *file, const char __user *p,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
unsigned long time_limit = jiffies + HZ;
|
|
struct vcpu_dispatch_data *disp;
|
|
int rc, cmd, cpu;
|
|
char buf[16];
|
|
|
|
if (count > 15)
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(buf, p, count))
|
|
return -EFAULT;
|
|
|
|
buf[count] = 0;
|
|
rc = kstrtoint(buf, 0, &cmd);
|
|
if (rc || cmd < 0 || cmd > 1) {
|
|
pr_err("vcpudispatch_stats: please use 0 to disable or 1 to enable dispatch statistics\n");
|
|
return rc ? rc : -EINVAL;
|
|
}
|
|
|
|
mutex_lock(&dtl_enable_mutex);
|
|
|
|
if ((cmd == 0 && !vcpudispatch_stats_on) ||
|
|
(cmd == 1 && vcpudispatch_stats_on))
|
|
goto out;
|
|
|
|
if (cmd) {
|
|
rc = init_cpu_associativity();
|
|
if (rc)
|
|
goto out;
|
|
|
|
for_each_possible_cpu(cpu) {
|
|
disp = per_cpu_ptr(&vcpu_disp_data, cpu);
|
|
memset(disp, 0, sizeof(*disp));
|
|
disp->last_disp_cpu = -1;
|
|
}
|
|
|
|
rc = dtl_worker_enable(&time_limit);
|
|
if (rc) {
|
|
destroy_cpu_associativity();
|
|
goto out;
|
|
}
|
|
} else {
|
|
dtl_worker_disable(&time_limit);
|
|
destroy_cpu_associativity();
|
|
}
|
|
|
|
vcpudispatch_stats_on = cmd;
|
|
|
|
out:
|
|
mutex_unlock(&dtl_enable_mutex);
|
|
if (rc)
|
|
return rc;
|
|
return count;
|
|
}
|
|
|
|
static int vcpudispatch_stats_display(struct seq_file *p, void *v)
|
|
{
|
|
int cpu;
|
|
struct vcpu_dispatch_data *disp;
|
|
|
|
if (!vcpudispatch_stats_on) {
|
|
seq_puts(p, "off\n");
|
|
return 0;
|
|
}
|
|
|
|
for_each_online_cpu(cpu) {
|
|
disp = per_cpu_ptr(&vcpu_disp_data, cpu);
|
|
seq_printf(p, "cpu%d", cpu);
|
|
seq_put_decimal_ull(p, " ", disp->total_disp);
|
|
seq_put_decimal_ull(p, " ", disp->same_cpu_disp);
|
|
seq_put_decimal_ull(p, " ", disp->same_chip_disp);
|
|
seq_put_decimal_ull(p, " ", disp->diff_chip_disp);
|
|
seq_put_decimal_ull(p, " ", disp->far_chip_disp);
|
|
seq_put_decimal_ull(p, " ", disp->numa_home_disp);
|
|
seq_put_decimal_ull(p, " ", disp->numa_remote_disp);
|
|
seq_put_decimal_ull(p, " ", disp->numa_far_disp);
|
|
seq_puts(p, "\n");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vcpudispatch_stats_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, vcpudispatch_stats_display, NULL);
|
|
}
|
|
|
|
static const struct proc_ops vcpudispatch_stats_proc_ops = {
|
|
.proc_open = vcpudispatch_stats_open,
|
|
.proc_read = seq_read,
|
|
.proc_write = vcpudispatch_stats_write,
|
|
.proc_lseek = seq_lseek,
|
|
.proc_release = single_release,
|
|
};
|
|
|
|
static ssize_t vcpudispatch_stats_freq_write(struct file *file,
|
|
const char __user *p, size_t count, loff_t *ppos)
|
|
{
|
|
int rc, freq;
|
|
char buf[16];
|
|
|
|
if (count > 15)
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(buf, p, count))
|
|
return -EFAULT;
|
|
|
|
buf[count] = 0;
|
|
rc = kstrtoint(buf, 0, &freq);
|
|
if (rc || freq < 1 || freq > HZ) {
|
|
pr_err("vcpudispatch_stats_freq: please specify a frequency between 1 and %d\n",
|
|
HZ);
|
|
return rc ? rc : -EINVAL;
|
|
}
|
|
|
|
vcpudispatch_stats_freq = freq;
|
|
|
|
return count;
|
|
}
|
|
|
|
static int vcpudispatch_stats_freq_display(struct seq_file *p, void *v)
|
|
{
|
|
seq_printf(p, "%d\n", vcpudispatch_stats_freq);
|
|
return 0;
|
|
}
|
|
|
|
static int vcpudispatch_stats_freq_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, vcpudispatch_stats_freq_display, NULL);
|
|
}
|
|
|
|
static const struct proc_ops vcpudispatch_stats_freq_proc_ops = {
|
|
.proc_open = vcpudispatch_stats_freq_open,
|
|
.proc_read = seq_read,
|
|
.proc_write = vcpudispatch_stats_freq_write,
|
|
.proc_lseek = seq_lseek,
|
|
.proc_release = single_release,
|
|
};
|
|
|
|
static int __init vcpudispatch_stats_procfs_init(void)
|
|
{
|
|
if (!lppaca_shared_proc(get_lppaca()))
|
|
return 0;
|
|
|
|
if (!proc_create("powerpc/vcpudispatch_stats", 0600, NULL,
|
|
&vcpudispatch_stats_proc_ops))
|
|
pr_err("vcpudispatch_stats: error creating procfs file\n");
|
|
else if (!proc_create("powerpc/vcpudispatch_stats_freq", 0600, NULL,
|
|
&vcpudispatch_stats_freq_proc_ops))
|
|
pr_err("vcpudispatch_stats_freq: error creating procfs file\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
machine_device_initcall(pseries, vcpudispatch_stats_procfs_init);
|
|
#endif /* CONFIG_PPC_SPLPAR */
|
|
|
|
void vpa_init(int cpu)
|
|
{
|
|
int hwcpu = get_hard_smp_processor_id(cpu);
|
|
unsigned long addr;
|
|
long ret;
|
|
|
|
/*
|
|
* The spec says it "may be problematic" if CPU x registers the VPA of
|
|
* CPU y. We should never do that, but wail if we ever do.
|
|
*/
|
|
WARN_ON(cpu != smp_processor_id());
|
|
|
|
if (cpu_has_feature(CPU_FTR_ALTIVEC))
|
|
lppaca_of(cpu).vmxregs_in_use = 1;
|
|
|
|
if (cpu_has_feature(CPU_FTR_ARCH_207S))
|
|
lppaca_of(cpu).ebb_regs_in_use = 1;
|
|
|
|
addr = __pa(&lppaca_of(cpu));
|
|
ret = register_vpa(hwcpu, addr);
|
|
|
|
if (ret) {
|
|
pr_err("WARNING: VPA registration for cpu %d (hw %d) of area "
|
|
"%lx failed with %ld\n", cpu, hwcpu, addr, ret);
|
|
return;
|
|
}
|
|
|
|
#ifdef CONFIG_PPC_BOOK3S_64
|
|
/*
|
|
* PAPR says this feature is SLB-Buffer but firmware never
|
|
* reports that. All SPLPAR support SLB shadow buffer.
|
|
*/
|
|
if (!radix_enabled() && firmware_has_feature(FW_FEATURE_SPLPAR)) {
|
|
addr = __pa(paca_ptrs[cpu]->slb_shadow_ptr);
|
|
ret = register_slb_shadow(hwcpu, addr);
|
|
if (ret)
|
|
pr_err("WARNING: SLB shadow buffer registration for "
|
|
"cpu %d (hw %d) of area %lx failed with %ld\n",
|
|
cpu, hwcpu, addr, ret);
|
|
}
|
|
#endif /* CONFIG_PPC_BOOK3S_64 */
|
|
|
|
/*
|
|
* Register dispatch trace log, if one has been allocated.
|
|
*/
|
|
register_dtl_buffer(cpu);
|
|
}
|
|
|
|
#ifdef CONFIG_PPC_BOOK3S_64
|
|
|
|
static long pSeries_lpar_hpte_insert(unsigned long hpte_group,
|
|
unsigned long vpn, unsigned long pa,
|
|
unsigned long rflags, unsigned long vflags,
|
|
int psize, int apsize, int ssize)
|
|
{
|
|
unsigned long lpar_rc;
|
|
unsigned long flags;
|
|
unsigned long slot;
|
|
unsigned long hpte_v, hpte_r;
|
|
|
|
if (!(vflags & HPTE_V_BOLTED))
|
|
pr_devel("hpte_insert(group=%lx, vpn=%016lx, "
|
|
"pa=%016lx, rflags=%lx, vflags=%lx, psize=%d)\n",
|
|
hpte_group, vpn, pa, rflags, vflags, psize);
|
|
|
|
hpte_v = hpte_encode_v(vpn, psize, apsize, ssize) | vflags | HPTE_V_VALID;
|
|
hpte_r = hpte_encode_r(pa, psize, apsize) | rflags;
|
|
|
|
if (!(vflags & HPTE_V_BOLTED))
|
|
pr_devel(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r);
|
|
|
|
/* Now fill in the actual HPTE */
|
|
/* Set CEC cookie to 0 */
|
|
/* Zero page = 0 */
|
|
/* I-cache Invalidate = 0 */
|
|
/* I-cache synchronize = 0 */
|
|
/* Exact = 0 */
|
|
flags = 0;
|
|
|
|
if (firmware_has_feature(FW_FEATURE_XCMO) && !(hpte_r & HPTE_R_N))
|
|
flags |= H_COALESCE_CAND;
|
|
|
|
lpar_rc = plpar_pte_enter(flags, hpte_group, hpte_v, hpte_r, &slot);
|
|
if (unlikely(lpar_rc == H_PTEG_FULL)) {
|
|
pr_devel("Hash table group is full\n");
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Since we try and ioremap PHBs we don't own, the pte insert
|
|
* will fail. However we must catch the failure in hash_page
|
|
* or we will loop forever, so return -2 in this case.
|
|
*/
|
|
if (unlikely(lpar_rc != H_SUCCESS)) {
|
|
pr_err("Failed hash pte insert with error %ld\n", lpar_rc);
|
|
return -2;
|
|
}
|
|
if (!(vflags & HPTE_V_BOLTED))
|
|
pr_devel(" -> slot: %lu\n", slot & 7);
|
|
|
|
/* Because of iSeries, we have to pass down the secondary
|
|
* bucket bit here as well
|
|
*/
|
|
return (slot & 7) | (!!(vflags & HPTE_V_SECONDARY) << 3);
|
|
}
|
|
|
|
static DEFINE_SPINLOCK(pSeries_lpar_tlbie_lock);
|
|
|
|
static long pSeries_lpar_hpte_remove(unsigned long hpte_group)
|
|
{
|
|
unsigned long slot_offset;
|
|
unsigned long lpar_rc;
|
|
int i;
|
|
unsigned long dummy1, dummy2;
|
|
|
|
/* pick a random slot to start at */
|
|
slot_offset = mftb() & 0x7;
|
|
|
|
for (i = 0; i < HPTES_PER_GROUP; i++) {
|
|
|
|
/* don't remove a bolted entry */
|
|
lpar_rc = plpar_pte_remove(H_ANDCOND, hpte_group + slot_offset,
|
|
HPTE_V_BOLTED, &dummy1, &dummy2);
|
|
if (lpar_rc == H_SUCCESS)
|
|
return i;
|
|
|
|
/*
|
|
* The test for adjunct partition is performed before the
|
|
* ANDCOND test. H_RESOURCE may be returned, so we need to
|
|
* check for that as well.
|
|
*/
|
|
BUG_ON(lpar_rc != H_NOT_FOUND && lpar_rc != H_RESOURCE);
|
|
|
|
slot_offset++;
|
|
slot_offset &= 0x7;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
static void manual_hpte_clear_all(void)
|
|
{
|
|
unsigned long size_bytes = 1UL << ppc64_pft_size;
|
|
unsigned long hpte_count = size_bytes >> 4;
|
|
struct {
|
|
unsigned long pteh;
|
|
unsigned long ptel;
|
|
} ptes[4];
|
|
long lpar_rc;
|
|
unsigned long i, j;
|
|
|
|
/* Read in batches of 4,
|
|
* invalidate only valid entries not in the VRMA
|
|
* hpte_count will be a multiple of 4
|
|
*/
|
|
for (i = 0; i < hpte_count; i += 4) {
|
|
lpar_rc = plpar_pte_read_4_raw(0, i, (void *)ptes);
|
|
if (lpar_rc != H_SUCCESS) {
|
|
pr_info("Failed to read hash page table at %ld err %ld\n",
|
|
i, lpar_rc);
|
|
continue;
|
|
}
|
|
for (j = 0; j < 4; j++){
|
|
if ((ptes[j].pteh & HPTE_V_VRMA_MASK) ==
|
|
HPTE_V_VRMA_MASK)
|
|
continue;
|
|
if (ptes[j].pteh & HPTE_V_VALID)
|
|
plpar_pte_remove_raw(0, i + j, 0,
|
|
&(ptes[j].pteh), &(ptes[j].ptel));
|
|
}
|
|
}
|
|
}
|
|
|
|
static int hcall_hpte_clear_all(void)
|
|
{
|
|
int rc;
|
|
|
|
do {
|
|
rc = plpar_hcall_norets(H_CLEAR_HPT);
|
|
} while (rc == H_CONTINUE);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static void pseries_hpte_clear_all(void)
|
|
{
|
|
int rc;
|
|
|
|
rc = hcall_hpte_clear_all();
|
|
if (rc != H_SUCCESS)
|
|
manual_hpte_clear_all();
|
|
|
|
#ifdef __LITTLE_ENDIAN__
|
|
/*
|
|
* Reset exceptions to big endian.
|
|
*
|
|
* FIXME this is a hack for kexec, we need to reset the exception
|
|
* endian before starting the new kernel and this is a convenient place
|
|
* to do it.
|
|
*
|
|
* This is also called on boot when a fadump happens. In that case we
|
|
* must not change the exception endian mode.
|
|
*/
|
|
if (firmware_has_feature(FW_FEATURE_SET_MODE) && !is_fadump_active())
|
|
pseries_big_endian_exceptions();
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and
|
|
* the low 3 bits of flags happen to line up. So no transform is needed.
|
|
* We can probably optimize here and assume the high bits of newpp are
|
|
* already zero. For now I am paranoid.
|
|
*/
|
|
static long pSeries_lpar_hpte_updatepp(unsigned long slot,
|
|
unsigned long newpp,
|
|
unsigned long vpn,
|
|
int psize, int apsize,
|
|
int ssize, unsigned long inv_flags)
|
|
{
|
|
unsigned long lpar_rc;
|
|
unsigned long flags;
|
|
unsigned long want_v;
|
|
|
|
want_v = hpte_encode_avpn(vpn, psize, ssize);
|
|
|
|
flags = (newpp & 7) | H_AVPN;
|
|
if (mmu_has_feature(MMU_FTR_KERNEL_RO))
|
|
/* Move pp0 into bit 8 (IBM 55) */
|
|
flags |= (newpp & HPTE_R_PP0) >> 55;
|
|
|
|
pr_devel(" update: avpnv=%016lx, hash=%016lx, f=%lx, psize: %d ...",
|
|
want_v, slot, flags, psize);
|
|
|
|
lpar_rc = plpar_pte_protect(flags, slot, want_v);
|
|
|
|
if (lpar_rc == H_NOT_FOUND) {
|
|
pr_devel("not found !\n");
|
|
return -1;
|
|
}
|
|
|
|
pr_devel("ok\n");
|
|
|
|
BUG_ON(lpar_rc != H_SUCCESS);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static long __pSeries_lpar_hpte_find(unsigned long want_v, unsigned long hpte_group)
|
|
{
|
|
long lpar_rc;
|
|
unsigned long i, j;
|
|
struct {
|
|
unsigned long pteh;
|
|
unsigned long ptel;
|
|
} ptes[4];
|
|
|
|
for (i = 0; i < HPTES_PER_GROUP; i += 4, hpte_group += 4) {
|
|
|
|
lpar_rc = plpar_pte_read_4(0, hpte_group, (void *)ptes);
|
|
if (lpar_rc != H_SUCCESS) {
|
|
pr_info("Failed to read hash page table at %ld err %ld\n",
|
|
hpte_group, lpar_rc);
|
|
continue;
|
|
}
|
|
|
|
for (j = 0; j < 4; j++) {
|
|
if (HPTE_V_COMPARE(ptes[j].pteh, want_v) &&
|
|
(ptes[j].pteh & HPTE_V_VALID))
|
|
return i + j;
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
static long pSeries_lpar_hpte_find(unsigned long vpn, int psize, int ssize)
|
|
{
|
|
long slot;
|
|
unsigned long hash;
|
|
unsigned long want_v;
|
|
unsigned long hpte_group;
|
|
|
|
hash = hpt_hash(vpn, mmu_psize_defs[psize].shift, ssize);
|
|
want_v = hpte_encode_avpn(vpn, psize, ssize);
|
|
|
|
/*
|
|
* We try to keep bolted entries always in primary hash
|
|
* But in some case we can find them in secondary too.
|
|
*/
|
|
hpte_group = (hash & htab_hash_mask) * HPTES_PER_GROUP;
|
|
slot = __pSeries_lpar_hpte_find(want_v, hpte_group);
|
|
if (slot < 0) {
|
|
/* Try in secondary */
|
|
hpte_group = (~hash & htab_hash_mask) * HPTES_PER_GROUP;
|
|
slot = __pSeries_lpar_hpte_find(want_v, hpte_group);
|
|
if (slot < 0)
|
|
return -1;
|
|
}
|
|
return hpte_group + slot;
|
|
}
|
|
|
|
static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp,
|
|
unsigned long ea,
|
|
int psize, int ssize)
|
|
{
|
|
unsigned long vpn;
|
|
unsigned long lpar_rc, slot, vsid, flags;
|
|
|
|
vsid = get_kernel_vsid(ea, ssize);
|
|
vpn = hpt_vpn(ea, vsid, ssize);
|
|
|
|
slot = pSeries_lpar_hpte_find(vpn, psize, ssize);
|
|
BUG_ON(slot == -1);
|
|
|
|
flags = newpp & 7;
|
|
if (mmu_has_feature(MMU_FTR_KERNEL_RO))
|
|
/* Move pp0 into bit 8 (IBM 55) */
|
|
flags |= (newpp & HPTE_R_PP0) >> 55;
|
|
|
|
lpar_rc = plpar_pte_protect(flags, slot, 0);
|
|
|
|
BUG_ON(lpar_rc != H_SUCCESS);
|
|
}
|
|
|
|
static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long vpn,
|
|
int psize, int apsize,
|
|
int ssize, int local)
|
|
{
|
|
unsigned long want_v;
|
|
unsigned long lpar_rc;
|
|
unsigned long dummy1, dummy2;
|
|
|
|
pr_devel(" inval : slot=%lx, vpn=%016lx, psize: %d, local: %d\n",
|
|
slot, vpn, psize, local);
|
|
|
|
want_v = hpte_encode_avpn(vpn, psize, ssize);
|
|
lpar_rc = plpar_pte_remove(H_AVPN, slot, want_v, &dummy1, &dummy2);
|
|
if (lpar_rc == H_NOT_FOUND)
|
|
return;
|
|
|
|
BUG_ON(lpar_rc != H_SUCCESS);
|
|
}
|
|
|
|
|
|
/*
|
|
* As defined in the PAPR's section 14.5.4.1.8
|
|
* The control mask doesn't include the returned reference and change bit from
|
|
* the processed PTE.
|
|
*/
|
|
#define HBLKR_AVPN 0x0100000000000000UL
|
|
#define HBLKR_CTRL_MASK 0xf800000000000000UL
|
|
#define HBLKR_CTRL_SUCCESS 0x8000000000000000UL
|
|
#define HBLKR_CTRL_ERRNOTFOUND 0x8800000000000000UL
|
|
#define HBLKR_CTRL_ERRBUSY 0xa000000000000000UL
|
|
|
|
/*
|
|
* Returned true if we are supporting this block size for the specified segment
|
|
* base page size and actual page size.
|
|
*
|
|
* Currently, we only support 8 size block.
|
|
*/
|
|
static inline bool is_supported_hlbkrm(int bpsize, int psize)
|
|
{
|
|
return (hblkrm_size[bpsize][psize] == HBLKRM_SUPPORTED_BLOCK_SIZE);
|
|
}
|
|
|
|
/**
|
|
* H_BLOCK_REMOVE caller.
|
|
* @idx should point to the latest @param entry set with a PTEX.
|
|
* If PTE cannot be processed because another CPUs has already locked that
|
|
* group, those entries are put back in @param starting at index 1.
|
|
* If entries has to be retried and @retry_busy is set to true, these entries
|
|
* are retried until success. If @retry_busy is set to false, the returned
|
|
* is the number of entries yet to process.
|
|
*/
|
|
static unsigned long call_block_remove(unsigned long idx, unsigned long *param,
|
|
bool retry_busy)
|
|
{
|
|
unsigned long i, rc, new_idx;
|
|
unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
|
|
|
|
if (idx < 2) {
|
|
pr_warn("Unexpected empty call to H_BLOCK_REMOVE");
|
|
return 0;
|
|
}
|
|
again:
|
|
new_idx = 0;
|
|
if (idx > PLPAR_HCALL9_BUFSIZE) {
|
|
pr_err("Too many PTEs (%lu) for H_BLOCK_REMOVE", idx);
|
|
idx = PLPAR_HCALL9_BUFSIZE;
|
|
} else if (idx < PLPAR_HCALL9_BUFSIZE)
|
|
param[idx] = HBR_END;
|
|
|
|
rc = plpar_hcall9(H_BLOCK_REMOVE, retbuf,
|
|
param[0], /* AVA */
|
|
param[1], param[2], param[3], param[4], /* TS0-7 */
|
|
param[5], param[6], param[7], param[8]);
|
|
if (rc == H_SUCCESS)
|
|
return 0;
|
|
|
|
BUG_ON(rc != H_PARTIAL);
|
|
|
|
/* Check that the unprocessed entries were 'not found' or 'busy' */
|
|
for (i = 0; i < idx-1; i++) {
|
|
unsigned long ctrl = retbuf[i] & HBLKR_CTRL_MASK;
|
|
|
|
if (ctrl == HBLKR_CTRL_ERRBUSY) {
|
|
param[++new_idx] = param[i+1];
|
|
continue;
|
|
}
|
|
|
|
BUG_ON(ctrl != HBLKR_CTRL_SUCCESS
|
|
&& ctrl != HBLKR_CTRL_ERRNOTFOUND);
|
|
}
|
|
|
|
/*
|
|
* If there were entries found busy, retry these entries if requested,
|
|
* of if all the entries have to be retried.
|
|
*/
|
|
if (new_idx && (retry_busy || new_idx == (PLPAR_HCALL9_BUFSIZE-1))) {
|
|
idx = new_idx + 1;
|
|
goto again;
|
|
}
|
|
|
|
return new_idx;
|
|
}
|
|
|
|
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
|
|
/*
|
|
* Limit iterations holding pSeries_lpar_tlbie_lock to 3. We also need
|
|
* to make sure that we avoid bouncing the hypervisor tlbie lock.
|
|
*/
|
|
#define PPC64_HUGE_HPTE_BATCH 12
|
|
|
|
static void hugepage_block_invalidate(unsigned long *slot, unsigned long *vpn,
|
|
int count, int psize, int ssize)
|
|
{
|
|
unsigned long param[PLPAR_HCALL9_BUFSIZE];
|
|
unsigned long shift, current_vpgb, vpgb;
|
|
int i, pix = 0;
|
|
|
|
shift = mmu_psize_defs[psize].shift;
|
|
|
|
for (i = 0; i < count; i++) {
|
|
/*
|
|
* Shifting 3 bits more on the right to get a
|
|
* 8 pages aligned virtual addresse.
|
|
*/
|
|
vpgb = (vpn[i] >> (shift - VPN_SHIFT + 3));
|
|
if (!pix || vpgb != current_vpgb) {
|
|
/*
|
|
* Need to start a new 8 pages block, flush
|
|
* the current one if needed.
|
|
*/
|
|
if (pix)
|
|
(void)call_block_remove(pix, param, true);
|
|
current_vpgb = vpgb;
|
|
param[0] = hpte_encode_avpn(vpn[i], psize, ssize);
|
|
pix = 1;
|
|
}
|
|
|
|
param[pix++] = HBR_REQUEST | HBLKR_AVPN | slot[i];
|
|
if (pix == PLPAR_HCALL9_BUFSIZE) {
|
|
pix = call_block_remove(pix, param, false);
|
|
/*
|
|
* pix = 0 means that all the entries were
|
|
* removed, we can start a new block.
|
|
* Otherwise, this means that there are entries
|
|
* to retry, and pix points to latest one, so
|
|
* we should increment it and try to continue
|
|
* the same block.
|
|
*/
|
|
if (pix)
|
|
pix++;
|
|
}
|
|
}
|
|
if (pix)
|
|
(void)call_block_remove(pix, param, true);
|
|
}
|
|
|
|
static void hugepage_bulk_invalidate(unsigned long *slot, unsigned long *vpn,
|
|
int count, int psize, int ssize)
|
|
{
|
|
unsigned long param[PLPAR_HCALL9_BUFSIZE];
|
|
int i = 0, pix = 0, rc;
|
|
|
|
for (i = 0; i < count; i++) {
|
|
|
|
if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) {
|
|
pSeries_lpar_hpte_invalidate(slot[i], vpn[i], psize, 0,
|
|
ssize, 0);
|
|
} else {
|
|
param[pix] = HBR_REQUEST | HBR_AVPN | slot[i];
|
|
param[pix+1] = hpte_encode_avpn(vpn[i], psize, ssize);
|
|
pix += 2;
|
|
if (pix == 8) {
|
|
rc = plpar_hcall9(H_BULK_REMOVE, param,
|
|
param[0], param[1], param[2],
|
|
param[3], param[4], param[5],
|
|
param[6], param[7]);
|
|
BUG_ON(rc != H_SUCCESS);
|
|
pix = 0;
|
|
}
|
|
}
|
|
}
|
|
if (pix) {
|
|
param[pix] = HBR_END;
|
|
rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1],
|
|
param[2], param[3], param[4], param[5],
|
|
param[6], param[7]);
|
|
BUG_ON(rc != H_SUCCESS);
|
|
}
|
|
}
|
|
|
|
static inline void __pSeries_lpar_hugepage_invalidate(unsigned long *slot,
|
|
unsigned long *vpn,
|
|
int count, int psize,
|
|
int ssize)
|
|
{
|
|
unsigned long flags = 0;
|
|
int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE);
|
|
|
|
if (lock_tlbie)
|
|
spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags);
|
|
|
|
/* Assuming THP size is 16M */
|
|
if (is_supported_hlbkrm(psize, MMU_PAGE_16M))
|
|
hugepage_block_invalidate(slot, vpn, count, psize, ssize);
|
|
else
|
|
hugepage_bulk_invalidate(slot, vpn, count, psize, ssize);
|
|
|
|
if (lock_tlbie)
|
|
spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags);
|
|
}
|
|
|
|
static void pSeries_lpar_hugepage_invalidate(unsigned long vsid,
|
|
unsigned long addr,
|
|
unsigned char *hpte_slot_array,
|
|
int psize, int ssize, int local)
|
|
{
|
|
int i, index = 0;
|
|
unsigned long s_addr = addr;
|
|
unsigned int max_hpte_count, valid;
|
|
unsigned long vpn_array[PPC64_HUGE_HPTE_BATCH];
|
|
unsigned long slot_array[PPC64_HUGE_HPTE_BATCH];
|
|
unsigned long shift, hidx, vpn = 0, hash, slot;
|
|
|
|
shift = mmu_psize_defs[psize].shift;
|
|
max_hpte_count = 1U << (PMD_SHIFT - shift);
|
|
|
|
for (i = 0; i < max_hpte_count; i++) {
|
|
valid = hpte_valid(hpte_slot_array, i);
|
|
if (!valid)
|
|
continue;
|
|
hidx = hpte_hash_index(hpte_slot_array, i);
|
|
|
|
/* get the vpn */
|
|
addr = s_addr + (i * (1ul << shift));
|
|
vpn = hpt_vpn(addr, vsid, ssize);
|
|
hash = hpt_hash(vpn, shift, ssize);
|
|
if (hidx & _PTEIDX_SECONDARY)
|
|
hash = ~hash;
|
|
|
|
slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
|
|
slot += hidx & _PTEIDX_GROUP_IX;
|
|
|
|
slot_array[index] = slot;
|
|
vpn_array[index] = vpn;
|
|
if (index == PPC64_HUGE_HPTE_BATCH - 1) {
|
|
/*
|
|
* Now do a bluk invalidate
|
|
*/
|
|
__pSeries_lpar_hugepage_invalidate(slot_array,
|
|
vpn_array,
|
|
PPC64_HUGE_HPTE_BATCH,
|
|
psize, ssize);
|
|
index = 0;
|
|
} else
|
|
index++;
|
|
}
|
|
if (index)
|
|
__pSeries_lpar_hugepage_invalidate(slot_array, vpn_array,
|
|
index, psize, ssize);
|
|
}
|
|
#else
|
|
static void pSeries_lpar_hugepage_invalidate(unsigned long vsid,
|
|
unsigned long addr,
|
|
unsigned char *hpte_slot_array,
|
|
int psize, int ssize, int local)
|
|
{
|
|
WARN(1, "%s called without THP support\n", __func__);
|
|
}
|
|
#endif
|
|
|
|
static int pSeries_lpar_hpte_removebolted(unsigned long ea,
|
|
int psize, int ssize)
|
|
{
|
|
unsigned long vpn;
|
|
unsigned long slot, vsid;
|
|
|
|
vsid = get_kernel_vsid(ea, ssize);
|
|
vpn = hpt_vpn(ea, vsid, ssize);
|
|
|
|
slot = pSeries_lpar_hpte_find(vpn, psize, ssize);
|
|
if (slot == -1)
|
|
return -ENOENT;
|
|
|
|
/*
|
|
* lpar doesn't use the passed actual page size
|
|
*/
|
|
pSeries_lpar_hpte_invalidate(slot, vpn, psize, 0, ssize, 0);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static inline unsigned long compute_slot(real_pte_t pte,
|
|
unsigned long vpn,
|
|
unsigned long index,
|
|
unsigned long shift,
|
|
int ssize)
|
|
{
|
|
unsigned long slot, hash, hidx;
|
|
|
|
hash = hpt_hash(vpn, shift, ssize);
|
|
hidx = __rpte_to_hidx(pte, index);
|
|
if (hidx & _PTEIDX_SECONDARY)
|
|
hash = ~hash;
|
|
slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
|
|
slot += hidx & _PTEIDX_GROUP_IX;
|
|
return slot;
|
|
}
|
|
|
|
/**
|
|
* The hcall H_BLOCK_REMOVE implies that the virtual pages to processed are
|
|
* "all within the same naturally aligned 8 page virtual address block".
|
|
*/
|
|
static void do_block_remove(unsigned long number, struct ppc64_tlb_batch *batch,
|
|
unsigned long *param)
|
|
{
|
|
unsigned long vpn;
|
|
unsigned long i, pix = 0;
|
|
unsigned long index, shift, slot, current_vpgb, vpgb;
|
|
real_pte_t pte;
|
|
int psize, ssize;
|
|
|
|
psize = batch->psize;
|
|
ssize = batch->ssize;
|
|
|
|
for (i = 0; i < number; i++) {
|
|
vpn = batch->vpn[i];
|
|
pte = batch->pte[i];
|
|
pte_iterate_hashed_subpages(pte, psize, vpn, index, shift) {
|
|
/*
|
|
* Shifting 3 bits more on the right to get a
|
|
* 8 pages aligned virtual addresse.
|
|
*/
|
|
vpgb = (vpn >> (shift - VPN_SHIFT + 3));
|
|
if (!pix || vpgb != current_vpgb) {
|
|
/*
|
|
* Need to start a new 8 pages block, flush
|
|
* the current one if needed.
|
|
*/
|
|
if (pix)
|
|
(void)call_block_remove(pix, param,
|
|
true);
|
|
current_vpgb = vpgb;
|
|
param[0] = hpte_encode_avpn(vpn, psize,
|
|
ssize);
|
|
pix = 1;
|
|
}
|
|
|
|
slot = compute_slot(pte, vpn, index, shift, ssize);
|
|
param[pix++] = HBR_REQUEST | HBLKR_AVPN | slot;
|
|
|
|
if (pix == PLPAR_HCALL9_BUFSIZE) {
|
|
pix = call_block_remove(pix, param, false);
|
|
/*
|
|
* pix = 0 means that all the entries were
|
|
* removed, we can start a new block.
|
|
* Otherwise, this means that there are entries
|
|
* to retry, and pix points to latest one, so
|
|
* we should increment it and try to continue
|
|
* the same block.
|
|
*/
|
|
if (pix)
|
|
pix++;
|
|
}
|
|
} pte_iterate_hashed_end();
|
|
}
|
|
|
|
if (pix)
|
|
(void)call_block_remove(pix, param, true);
|
|
}
|
|
|
|
/*
|
|
* TLB Block Invalidate Characteristics
|
|
*
|
|
* These characteristics define the size of the block the hcall H_BLOCK_REMOVE
|
|
* is able to process for each couple segment base page size, actual page size.
|
|
*
|
|
* The ibm,get-system-parameter properties is returning a buffer with the
|
|
* following layout:
|
|
*
|
|
* [ 2 bytes size of the RTAS buffer (excluding these 2 bytes) ]
|
|
* -----------------
|
|
* TLB Block Invalidate Specifiers:
|
|
* [ 1 byte LOG base 2 of the TLB invalidate block size being specified ]
|
|
* [ 1 byte Number of page sizes (N) that are supported for the specified
|
|
* TLB invalidate block size ]
|
|
* [ 1 byte Encoded segment base page size and actual page size
|
|
* MSB=0 means 4k segment base page size and actual page size
|
|
* MSB=1 the penc value in mmu_psize_def ]
|
|
* ...
|
|
* -----------------
|
|
* Next TLB Block Invalidate Specifiers...
|
|
* -----------------
|
|
* [ 0 ]
|
|
*/
|
|
static inline void set_hblkrm_bloc_size(int bpsize, int psize,
|
|
unsigned int block_size)
|
|
{
|
|
if (block_size > hblkrm_size[bpsize][psize])
|
|
hblkrm_size[bpsize][psize] = block_size;
|
|
}
|
|
|
|
/*
|
|
* Decode the Encoded segment base page size and actual page size.
|
|
* PAPR specifies:
|
|
* - bit 7 is the L bit
|
|
* - bits 0-5 are the penc value
|
|
* If the L bit is 0, this means 4K segment base page size and actual page size
|
|
* otherwise the penc value should be read.
|
|
*/
|
|
#define HBLKRM_L_MASK 0x80
|
|
#define HBLKRM_PENC_MASK 0x3f
|
|
static inline void __init check_lp_set_hblkrm(unsigned int lp,
|
|
unsigned int block_size)
|
|
{
|
|
unsigned int bpsize, psize;
|
|
|
|
/* First, check the L bit, if not set, this means 4K */
|
|
if ((lp & HBLKRM_L_MASK) == 0) {
|
|
set_hblkrm_bloc_size(MMU_PAGE_4K, MMU_PAGE_4K, block_size);
|
|
return;
|
|
}
|
|
|
|
lp &= HBLKRM_PENC_MASK;
|
|
for (bpsize = 0; bpsize < MMU_PAGE_COUNT; bpsize++) {
|
|
struct mmu_psize_def *def = &mmu_psize_defs[bpsize];
|
|
|
|
for (psize = 0; psize < MMU_PAGE_COUNT; psize++) {
|
|
if (def->penc[psize] == lp) {
|
|
set_hblkrm_bloc_size(bpsize, psize, block_size);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#define SPLPAR_TLB_BIC_TOKEN 50
|
|
|
|
/*
|
|
* The size of the TLB Block Invalidate Characteristics is variable. But at the
|
|
* maximum it will be the number of possible page sizes *2 + 10 bytes.
|
|
* Currently MMU_PAGE_COUNT is 16, which means 42 bytes. Use a cache line size
|
|
* (128 bytes) for the buffer to get plenty of space.
|
|
*/
|
|
#define SPLPAR_TLB_BIC_MAXLENGTH 128
|
|
|
|
void __init pseries_lpar_read_hblkrm_characteristics(void)
|
|
{
|
|
unsigned char local_buffer[SPLPAR_TLB_BIC_MAXLENGTH];
|
|
int call_status, len, idx, bpsize;
|
|
|
|
if (!firmware_has_feature(FW_FEATURE_BLOCK_REMOVE))
|
|
return;
|
|
|
|
spin_lock(&rtas_data_buf_lock);
|
|
memset(rtas_data_buf, 0, RTAS_DATA_BUF_SIZE);
|
|
call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
|
|
NULL,
|
|
SPLPAR_TLB_BIC_TOKEN,
|
|
__pa(rtas_data_buf),
|
|
RTAS_DATA_BUF_SIZE);
|
|
memcpy(local_buffer, rtas_data_buf, SPLPAR_TLB_BIC_MAXLENGTH);
|
|
local_buffer[SPLPAR_TLB_BIC_MAXLENGTH - 1] = '\0';
|
|
spin_unlock(&rtas_data_buf_lock);
|
|
|
|
if (call_status != 0) {
|
|
pr_warn("%s %s Error calling get-system-parameter (0x%x)\n",
|
|
__FILE__, __func__, call_status);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* The first two (2) bytes of the data in the buffer are the length of
|
|
* the returned data, not counting these first two (2) bytes.
|
|
*/
|
|
len = be16_to_cpu(*((u16 *)local_buffer)) + 2;
|
|
if (len > SPLPAR_TLB_BIC_MAXLENGTH) {
|
|
pr_warn("%s too large returned buffer %d", __func__, len);
|
|
return;
|
|
}
|
|
|
|
idx = 2;
|
|
while (idx < len) {
|
|
u8 block_shift = local_buffer[idx++];
|
|
u32 block_size;
|
|
unsigned int npsize;
|
|
|
|
if (!block_shift)
|
|
break;
|
|
|
|
block_size = 1 << block_shift;
|
|
|
|
for (npsize = local_buffer[idx++];
|
|
npsize > 0 && idx < len; npsize--)
|
|
check_lp_set_hblkrm((unsigned int) local_buffer[idx++],
|
|
block_size);
|
|
}
|
|
|
|
for (bpsize = 0; bpsize < MMU_PAGE_COUNT; bpsize++)
|
|
for (idx = 0; idx < MMU_PAGE_COUNT; idx++)
|
|
if (hblkrm_size[bpsize][idx])
|
|
pr_info("H_BLOCK_REMOVE supports base psize:%d psize:%d block size:%d",
|
|
bpsize, idx, hblkrm_size[bpsize][idx]);
|
|
}
|
|
|
|
/*
|
|
* Take a spinlock around flushes to avoid bouncing the hypervisor tlbie
|
|
* lock.
|
|
*/
|
|
static void pSeries_lpar_flush_hash_range(unsigned long number, int local)
|
|
{
|
|
unsigned long vpn;
|
|
unsigned long i, pix, rc;
|
|
unsigned long flags = 0;
|
|
struct ppc64_tlb_batch *batch = this_cpu_ptr(&ppc64_tlb_batch);
|
|
int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE);
|
|
unsigned long param[PLPAR_HCALL9_BUFSIZE];
|
|
unsigned long index, shift, slot;
|
|
real_pte_t pte;
|
|
int psize, ssize;
|
|
|
|
if (lock_tlbie)
|
|
spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags);
|
|
|
|
if (is_supported_hlbkrm(batch->psize, batch->psize)) {
|
|
do_block_remove(number, batch, param);
|
|
goto out;
|
|
}
|
|
|
|
psize = batch->psize;
|
|
ssize = batch->ssize;
|
|
pix = 0;
|
|
for (i = 0; i < number; i++) {
|
|
vpn = batch->vpn[i];
|
|
pte = batch->pte[i];
|
|
pte_iterate_hashed_subpages(pte, psize, vpn, index, shift) {
|
|
slot = compute_slot(pte, vpn, index, shift, ssize);
|
|
if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) {
|
|
/*
|
|
* lpar doesn't use the passed actual page size
|
|
*/
|
|
pSeries_lpar_hpte_invalidate(slot, vpn, psize,
|
|
0, ssize, local);
|
|
} else {
|
|
param[pix] = HBR_REQUEST | HBR_AVPN | slot;
|
|
param[pix+1] = hpte_encode_avpn(vpn, psize,
|
|
ssize);
|
|
pix += 2;
|
|
if (pix == 8) {
|
|
rc = plpar_hcall9(H_BULK_REMOVE, param,
|
|
param[0], param[1], param[2],
|
|
param[3], param[4], param[5],
|
|
param[6], param[7]);
|
|
BUG_ON(rc != H_SUCCESS);
|
|
pix = 0;
|
|
}
|
|
}
|
|
} pte_iterate_hashed_end();
|
|
}
|
|
if (pix) {
|
|
param[pix] = HBR_END;
|
|
rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1],
|
|
param[2], param[3], param[4], param[5],
|
|
param[6], param[7]);
|
|
BUG_ON(rc != H_SUCCESS);
|
|
}
|
|
|
|
out:
|
|
if (lock_tlbie)
|
|
spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags);
|
|
}
|
|
|
|
static int __init disable_bulk_remove(char *str)
|
|
{
|
|
if (strcmp(str, "off") == 0 &&
|
|
firmware_has_feature(FW_FEATURE_BULK_REMOVE)) {
|
|
pr_info("Disabling BULK_REMOVE firmware feature");
|
|
powerpc_firmware_features &= ~FW_FEATURE_BULK_REMOVE;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
__setup("bulk_remove=", disable_bulk_remove);
|
|
|
|
#define HPT_RESIZE_TIMEOUT 10000 /* ms */
|
|
|
|
struct hpt_resize_state {
|
|
unsigned long shift;
|
|
int commit_rc;
|
|
};
|
|
|
|
static int pseries_lpar_resize_hpt_commit(void *data)
|
|
{
|
|
struct hpt_resize_state *state = data;
|
|
|
|
state->commit_rc = plpar_resize_hpt_commit(0, state->shift);
|
|
if (state->commit_rc != H_SUCCESS)
|
|
return -EIO;
|
|
|
|
/* Hypervisor has transitioned the HTAB, update our globals */
|
|
ppc64_pft_size = state->shift;
|
|
htab_size_bytes = 1UL << ppc64_pft_size;
|
|
htab_hash_mask = (htab_size_bytes >> 7) - 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Must be called in process context. The caller must hold the
|
|
* cpus_lock.
|
|
*/
|
|
static int pseries_lpar_resize_hpt(unsigned long shift)
|
|
{
|
|
struct hpt_resize_state state = {
|
|
.shift = shift,
|
|
.commit_rc = H_FUNCTION,
|
|
};
|
|
unsigned int delay, total_delay = 0;
|
|
int rc;
|
|
ktime_t t0, t1, t2;
|
|
|
|
might_sleep();
|
|
|
|
if (!firmware_has_feature(FW_FEATURE_HPT_RESIZE))
|
|
return -ENODEV;
|
|
|
|
pr_info("Attempting to resize HPT to shift %lu\n", shift);
|
|
|
|
t0 = ktime_get();
|
|
|
|
rc = plpar_resize_hpt_prepare(0, shift);
|
|
while (H_IS_LONG_BUSY(rc)) {
|
|
delay = get_longbusy_msecs(rc);
|
|
total_delay += delay;
|
|
if (total_delay > HPT_RESIZE_TIMEOUT) {
|
|
/* prepare with shift==0 cancels an in-progress resize */
|
|
rc = plpar_resize_hpt_prepare(0, 0);
|
|
if (rc != H_SUCCESS)
|
|
pr_warn("Unexpected error %d cancelling timed out HPT resize\n",
|
|
rc);
|
|
return -ETIMEDOUT;
|
|
}
|
|
msleep(delay);
|
|
rc = plpar_resize_hpt_prepare(0, shift);
|
|
};
|
|
|
|
switch (rc) {
|
|
case H_SUCCESS:
|
|
/* Continue on */
|
|
break;
|
|
|
|
case H_PARAMETER:
|
|
pr_warn("Invalid argument from H_RESIZE_HPT_PREPARE\n");
|
|
return -EINVAL;
|
|
case H_RESOURCE:
|
|
pr_warn("Operation not permitted from H_RESIZE_HPT_PREPARE\n");
|
|
return -EPERM;
|
|
default:
|
|
pr_warn("Unexpected error %d from H_RESIZE_HPT_PREPARE\n", rc);
|
|
return -EIO;
|
|
}
|
|
|
|
t1 = ktime_get();
|
|
|
|
rc = stop_machine_cpuslocked(pseries_lpar_resize_hpt_commit,
|
|
&state, NULL);
|
|
|
|
t2 = ktime_get();
|
|
|
|
if (rc != 0) {
|
|
switch (state.commit_rc) {
|
|
case H_PTEG_FULL:
|
|
return -ENOSPC;
|
|
|
|
default:
|
|
pr_warn("Unexpected error %d from H_RESIZE_HPT_COMMIT\n",
|
|
state.commit_rc);
|
|
return -EIO;
|
|
};
|
|
}
|
|
|
|
pr_info("HPT resize to shift %lu complete (%lld ms / %lld ms)\n",
|
|
shift, (long long) ktime_ms_delta(t1, t0),
|
|
(long long) ktime_ms_delta(t2, t1));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pseries_lpar_register_process_table(unsigned long base,
|
|
unsigned long page_size, unsigned long table_size)
|
|
{
|
|
long rc;
|
|
unsigned long flags = 0;
|
|
|
|
if (table_size)
|
|
flags |= PROC_TABLE_NEW;
|
|
if (radix_enabled())
|
|
flags |= PROC_TABLE_RADIX | PROC_TABLE_GTSE;
|
|
else
|
|
flags |= PROC_TABLE_HPT_SLB;
|
|
for (;;) {
|
|
rc = plpar_hcall_norets(H_REGISTER_PROC_TBL, flags, base,
|
|
page_size, table_size);
|
|
if (!H_IS_LONG_BUSY(rc))
|
|
break;
|
|
mdelay(get_longbusy_msecs(rc));
|
|
}
|
|
if (rc != H_SUCCESS) {
|
|
pr_err("Failed to register process table (rc=%ld)\n", rc);
|
|
BUG();
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
void __init hpte_init_pseries(void)
|
|
{
|
|
mmu_hash_ops.hpte_invalidate = pSeries_lpar_hpte_invalidate;
|
|
mmu_hash_ops.hpte_updatepp = pSeries_lpar_hpte_updatepp;
|
|
mmu_hash_ops.hpte_updateboltedpp = pSeries_lpar_hpte_updateboltedpp;
|
|
mmu_hash_ops.hpte_insert = pSeries_lpar_hpte_insert;
|
|
mmu_hash_ops.hpte_remove = pSeries_lpar_hpte_remove;
|
|
mmu_hash_ops.hpte_removebolted = pSeries_lpar_hpte_removebolted;
|
|
mmu_hash_ops.flush_hash_range = pSeries_lpar_flush_hash_range;
|
|
mmu_hash_ops.hpte_clear_all = pseries_hpte_clear_all;
|
|
mmu_hash_ops.hugepage_invalidate = pSeries_lpar_hugepage_invalidate;
|
|
|
|
if (firmware_has_feature(FW_FEATURE_HPT_RESIZE))
|
|
mmu_hash_ops.resize_hpt = pseries_lpar_resize_hpt;
|
|
|
|
/*
|
|
* On POWER9, we need to do a H_REGISTER_PROC_TBL hcall
|
|
* to inform the hypervisor that we wish to use the HPT.
|
|
*/
|
|
if (cpu_has_feature(CPU_FTR_ARCH_300))
|
|
pseries_lpar_register_process_table(0, 0, 0);
|
|
}
|
|
|
|
void radix_init_pseries(void)
|
|
{
|
|
pr_info("Using radix MMU under hypervisor\n");
|
|
|
|
pseries_lpar_register_process_table(__pa(process_tb),
|
|
0, PRTB_SIZE_SHIFT - 12);
|
|
}
|
|
|
|
#ifdef CONFIG_PPC_SMLPAR
|
|
#define CMO_FREE_HINT_DEFAULT 1
|
|
static int cmo_free_hint_flag = CMO_FREE_HINT_DEFAULT;
|
|
|
|
static int __init cmo_free_hint(char *str)
|
|
{
|
|
char *parm;
|
|
parm = strstrip(str);
|
|
|
|
if (strcasecmp(parm, "no") == 0 || strcasecmp(parm, "off") == 0) {
|
|
pr_info("%s: CMO free page hinting is not active.\n", __func__);
|
|
cmo_free_hint_flag = 0;
|
|
return 1;
|
|
}
|
|
|
|
cmo_free_hint_flag = 1;
|
|
pr_info("%s: CMO free page hinting is active.\n", __func__);
|
|
|
|
if (strcasecmp(parm, "yes") == 0 || strcasecmp(parm, "on") == 0)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
__setup("cmo_free_hint=", cmo_free_hint);
|
|
|
|
static void pSeries_set_page_state(struct page *page, int order,
|
|
unsigned long state)
|
|
{
|
|
int i, j;
|
|
unsigned long cmo_page_sz, addr;
|
|
|
|
cmo_page_sz = cmo_get_page_size();
|
|
addr = __pa((unsigned long)page_address(page));
|
|
|
|
for (i = 0; i < (1 << order); i++, addr += PAGE_SIZE) {
|
|
for (j = 0; j < PAGE_SIZE; j += cmo_page_sz)
|
|
plpar_hcall_norets(H_PAGE_INIT, state, addr + j, 0);
|
|
}
|
|
}
|
|
|
|
void arch_free_page(struct page *page, int order)
|
|
{
|
|
if (radix_enabled())
|
|
return;
|
|
if (!cmo_free_hint_flag || !firmware_has_feature(FW_FEATURE_CMO))
|
|
return;
|
|
|
|
pSeries_set_page_state(page, order, H_PAGE_SET_UNUSED);
|
|
}
|
|
EXPORT_SYMBOL(arch_free_page);
|
|
|
|
#endif /* CONFIG_PPC_SMLPAR */
|
|
#endif /* CONFIG_PPC_BOOK3S_64 */
|
|
|
|
#ifdef CONFIG_TRACEPOINTS
|
|
#ifdef CONFIG_JUMP_LABEL
|
|
struct static_key hcall_tracepoint_key = STATIC_KEY_INIT;
|
|
|
|
int hcall_tracepoint_regfunc(void)
|
|
{
|
|
static_key_slow_inc(&hcall_tracepoint_key);
|
|
return 0;
|
|
}
|
|
|
|
void hcall_tracepoint_unregfunc(void)
|
|
{
|
|
static_key_slow_dec(&hcall_tracepoint_key);
|
|
}
|
|
#else
|
|
/*
|
|
* We optimise our hcall path by placing hcall_tracepoint_refcount
|
|
* directly in the TOC so we can check if the hcall tracepoints are
|
|
* enabled via a single load.
|
|
*/
|
|
|
|
/* NB: reg/unreg are called while guarded with the tracepoints_mutex */
|
|
extern long hcall_tracepoint_refcount;
|
|
|
|
int hcall_tracepoint_regfunc(void)
|
|
{
|
|
hcall_tracepoint_refcount++;
|
|
return 0;
|
|
}
|
|
|
|
void hcall_tracepoint_unregfunc(void)
|
|
{
|
|
hcall_tracepoint_refcount--;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Since the tracing code might execute hcalls we need to guard against
|
|
* recursion. One example of this are spinlocks calling H_YIELD on
|
|
* shared processor partitions.
|
|
*/
|
|
static DEFINE_PER_CPU(unsigned int, hcall_trace_depth);
|
|
|
|
|
|
void __trace_hcall_entry(unsigned long opcode, unsigned long *args)
|
|
{
|
|
unsigned long flags;
|
|
unsigned int *depth;
|
|
|
|
/*
|
|
* We cannot call tracepoints inside RCU idle regions which
|
|
* means we must not trace H_CEDE.
|
|
*/
|
|
if (opcode == H_CEDE)
|
|
return;
|
|
|
|
local_irq_save(flags);
|
|
|
|
depth = this_cpu_ptr(&hcall_trace_depth);
|
|
|
|
if (*depth)
|
|
goto out;
|
|
|
|
(*depth)++;
|
|
preempt_disable();
|
|
trace_hcall_entry(opcode, args);
|
|
(*depth)--;
|
|
|
|
out:
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
void __trace_hcall_exit(long opcode, long retval, unsigned long *retbuf)
|
|
{
|
|
unsigned long flags;
|
|
unsigned int *depth;
|
|
|
|
if (opcode == H_CEDE)
|
|
return;
|
|
|
|
local_irq_save(flags);
|
|
|
|
depth = this_cpu_ptr(&hcall_trace_depth);
|
|
|
|
if (*depth)
|
|
goto out;
|
|
|
|
(*depth)++;
|
|
trace_hcall_exit(opcode, retval, retbuf);
|
|
preempt_enable();
|
|
(*depth)--;
|
|
|
|
out:
|
|
local_irq_restore(flags);
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* h_get_mpp
|
|
* H_GET_MPP hcall returns info in 7 parms
|
|
*/
|
|
int h_get_mpp(struct hvcall_mpp_data *mpp_data)
|
|
{
|
|
int rc;
|
|
unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
|
|
|
|
rc = plpar_hcall9(H_GET_MPP, retbuf);
|
|
|
|
mpp_data->entitled_mem = retbuf[0];
|
|
mpp_data->mapped_mem = retbuf[1];
|
|
|
|
mpp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff;
|
|
mpp_data->pool_num = retbuf[2] & 0xffff;
|
|
|
|
mpp_data->mem_weight = (retbuf[3] >> 7 * 8) & 0xff;
|
|
mpp_data->unallocated_mem_weight = (retbuf[3] >> 6 * 8) & 0xff;
|
|
mpp_data->unallocated_entitlement = retbuf[3] & 0xffffffffffffUL;
|
|
|
|
mpp_data->pool_size = retbuf[4];
|
|
mpp_data->loan_request = retbuf[5];
|
|
mpp_data->backing_mem = retbuf[6];
|
|
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL(h_get_mpp);
|
|
|
|
int h_get_mpp_x(struct hvcall_mpp_x_data *mpp_x_data)
|
|
{
|
|
int rc;
|
|
unsigned long retbuf[PLPAR_HCALL9_BUFSIZE] = { 0 };
|
|
|
|
rc = plpar_hcall9(H_GET_MPP_X, retbuf);
|
|
|
|
mpp_x_data->coalesced_bytes = retbuf[0];
|
|
mpp_x_data->pool_coalesced_bytes = retbuf[1];
|
|
mpp_x_data->pool_purr_cycles = retbuf[2];
|
|
mpp_x_data->pool_spurr_cycles = retbuf[3];
|
|
|
|
return rc;
|
|
}
|
|
|
|
static unsigned long vsid_unscramble(unsigned long vsid, int ssize)
|
|
{
|
|
unsigned long protovsid;
|
|
unsigned long va_bits = VA_BITS;
|
|
unsigned long modinv, vsid_modulus;
|
|
unsigned long max_mod_inv, tmp_modinv;
|
|
|
|
if (!mmu_has_feature(MMU_FTR_68_BIT_VA))
|
|
va_bits = 65;
|
|
|
|
if (ssize == MMU_SEGSIZE_256M) {
|
|
modinv = VSID_MULINV_256M;
|
|
vsid_modulus = ((1UL << (va_bits - SID_SHIFT)) - 1);
|
|
} else {
|
|
modinv = VSID_MULINV_1T;
|
|
vsid_modulus = ((1UL << (va_bits - SID_SHIFT_1T)) - 1);
|
|
}
|
|
|
|
/*
|
|
* vsid outside our range.
|
|
*/
|
|
if (vsid >= vsid_modulus)
|
|
return 0;
|
|
|
|
/*
|
|
* If modinv is the modular multiplicate inverse of (x % vsid_modulus)
|
|
* and vsid = (protovsid * x) % vsid_modulus, then we say:
|
|
* protovsid = (vsid * modinv) % vsid_modulus
|
|
*/
|
|
|
|
/* Check if (vsid * modinv) overflow (63 bits) */
|
|
max_mod_inv = 0x7fffffffffffffffull / vsid;
|
|
if (modinv < max_mod_inv)
|
|
return (vsid * modinv) % vsid_modulus;
|
|
|
|
tmp_modinv = modinv/max_mod_inv;
|
|
modinv %= max_mod_inv;
|
|
|
|
protovsid = (((vsid * max_mod_inv) % vsid_modulus) * tmp_modinv) % vsid_modulus;
|
|
protovsid = (protovsid + vsid * modinv) % vsid_modulus;
|
|
|
|
return protovsid;
|
|
}
|
|
|
|
static int __init reserve_vrma_context_id(void)
|
|
{
|
|
unsigned long protovsid;
|
|
|
|
/*
|
|
* Reserve context ids which map to reserved virtual addresses. For now
|
|
* we only reserve the context id which maps to the VRMA VSID. We ignore
|
|
* the addresses in "ibm,adjunct-virtual-addresses" because we don't
|
|
* enable adjunct support via the "ibm,client-architecture-support"
|
|
* interface.
|
|
*/
|
|
protovsid = vsid_unscramble(VRMA_VSID, MMU_SEGSIZE_1T);
|
|
hash__reserve_context_id(protovsid >> ESID_BITS_1T);
|
|
return 0;
|
|
}
|
|
machine_device_initcall(pseries, reserve_vrma_context_id);
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
/* debugfs file interface for vpa data */
|
|
static ssize_t vpa_file_read(struct file *filp, char __user *buf, size_t len,
|
|
loff_t *pos)
|
|
{
|
|
int cpu = (long)filp->private_data;
|
|
struct lppaca *lppaca = &lppaca_of(cpu);
|
|
|
|
return simple_read_from_buffer(buf, len, pos, lppaca,
|
|
sizeof(struct lppaca));
|
|
}
|
|
|
|
static const struct file_operations vpa_fops = {
|
|
.open = simple_open,
|
|
.read = vpa_file_read,
|
|
.llseek = default_llseek,
|
|
};
|
|
|
|
static int __init vpa_debugfs_init(void)
|
|
{
|
|
char name[16];
|
|
long i;
|
|
struct dentry *vpa_dir;
|
|
|
|
if (!firmware_has_feature(FW_FEATURE_SPLPAR))
|
|
return 0;
|
|
|
|
vpa_dir = debugfs_create_dir("vpa", powerpc_debugfs_root);
|
|
|
|
/* set up the per-cpu vpa file*/
|
|
for_each_possible_cpu(i) {
|
|
sprintf(name, "cpu-%ld", i);
|
|
debugfs_create_file(name, 0400, vpa_dir, (void *)i, &vpa_fops);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
machine_arch_initcall(pseries, vpa_debugfs_init);
|
|
#endif /* CONFIG_DEBUG_FS */
|