forked from Minki/linux
819 lines
20 KiB
C
819 lines
20 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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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#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 <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/tlbflush.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 "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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void vpa_init(int cpu)
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{
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int hwcpu = get_hard_smp_processor_id(cpu);
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unsigned long addr;
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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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/*
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* The spec says it "may be problematic" if CPU x registers the VPA of
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* CPU y. We should never do that, but wail if we ever do.
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*/
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WARN_ON(cpu != smp_processor_id());
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if (cpu_has_feature(CPU_FTR_ALTIVEC))
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lppaca_of(cpu).vmxregs_in_use = 1;
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if (cpu_has_feature(CPU_FTR_ARCH_207S))
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lppaca_of(cpu).ebb_regs_in_use = 1;
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addr = __pa(&lppaca_of(cpu));
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ret = register_vpa(hwcpu, addr);
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if (ret) {
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pr_err("WARNING: VPA registration for cpu %d (hw %d) of area "
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"%lx failed with %ld\n", cpu, hwcpu, addr, ret);
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return;
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}
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#ifdef CONFIG_PPC_STD_MMU_64
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/*
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* PAPR says this feature is SLB-Buffer but firmware never
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* reports that. All SPLPAR support SLB shadow buffer.
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*/
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if (!radix_enabled() && firmware_has_feature(FW_FEATURE_SPLPAR)) {
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addr = __pa(paca[cpu].slb_shadow_ptr);
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ret = register_slb_shadow(hwcpu, addr);
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if (ret)
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pr_err("WARNING: SLB shadow buffer registration for "
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"cpu %d (hw %d) of area %lx failed with %ld\n",
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cpu, hwcpu, addr, ret);
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}
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#endif /* CONFIG_PPC_STD_MMU_64 */
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/*
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* Register dispatch trace log, if one has been allocated.
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*/
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pp = &paca[cpu];
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dtl = pp->dispatch_log;
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if (dtl) {
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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) "
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"failed with %ld\n", smp_processor_id(),
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hwcpu, ret);
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lppaca_of(cpu).dtl_enable_mask = 2;
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}
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}
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#ifdef CONFIG_PPC_STD_MMU_64
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static long pSeries_lpar_hpte_insert(unsigned long hpte_group,
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unsigned long vpn, unsigned long pa,
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unsigned long rflags, unsigned long vflags,
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int psize, int apsize, int ssize)
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{
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unsigned long lpar_rc;
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unsigned long flags;
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unsigned long slot;
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unsigned long hpte_v, hpte_r;
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if (!(vflags & HPTE_V_BOLTED))
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pr_devel("hpte_insert(group=%lx, vpn=%016lx, "
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"pa=%016lx, rflags=%lx, vflags=%lx, psize=%d)\n",
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hpte_group, vpn, pa, rflags, vflags, psize);
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hpte_v = hpte_encode_v(vpn, psize, apsize, ssize) | vflags | HPTE_V_VALID;
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hpte_r = hpte_encode_r(pa, psize, apsize) | rflags;
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if (!(vflags & HPTE_V_BOLTED))
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pr_devel(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r);
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/* Now fill in the actual HPTE */
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/* Set CEC cookie to 0 */
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/* Zero page = 0 */
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/* I-cache Invalidate = 0 */
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/* I-cache synchronize = 0 */
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/* Exact = 0 */
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flags = 0;
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if (firmware_has_feature(FW_FEATURE_XCMO) && !(hpte_r & HPTE_R_N))
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flags |= H_COALESCE_CAND;
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lpar_rc = plpar_pte_enter(flags, hpte_group, hpte_v, hpte_r, &slot);
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if (unlikely(lpar_rc == H_PTEG_FULL)) {
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if (!(vflags & HPTE_V_BOLTED))
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pr_devel(" full\n");
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return -1;
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}
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/*
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* Since we try and ioremap PHBs we don't own, the pte insert
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* will fail. However we must catch the failure in hash_page
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* or we will loop forever, so return -2 in this case.
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*/
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if (unlikely(lpar_rc != H_SUCCESS)) {
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if (!(vflags & HPTE_V_BOLTED))
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pr_devel(" lpar err %ld\n", lpar_rc);
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return -2;
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}
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if (!(vflags & HPTE_V_BOLTED))
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pr_devel(" -> slot: %lu\n", slot & 7);
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/* Because of iSeries, we have to pass down the secondary
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* bucket bit here as well
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*/
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return (slot & 7) | (!!(vflags & HPTE_V_SECONDARY) << 3);
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}
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static DEFINE_SPINLOCK(pSeries_lpar_tlbie_lock);
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static long pSeries_lpar_hpte_remove(unsigned long hpte_group)
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{
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unsigned long slot_offset;
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unsigned long lpar_rc;
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int i;
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unsigned long dummy1, dummy2;
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/* pick a random slot to start at */
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slot_offset = mftb() & 0x7;
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for (i = 0; i < HPTES_PER_GROUP; i++) {
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/* don't remove a bolted entry */
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lpar_rc = plpar_pte_remove(H_ANDCOND, hpte_group + slot_offset,
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(0x1UL << 4), &dummy1, &dummy2);
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if (lpar_rc == H_SUCCESS)
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return i;
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/*
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* The test for adjunct partition is performed before the
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* ANDCOND test. H_RESOURCE may be returned, so we need to
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* check for that as well.
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*/
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BUG_ON(lpar_rc != H_NOT_FOUND && lpar_rc != H_RESOURCE);
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slot_offset++;
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slot_offset &= 0x7;
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}
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return -1;
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}
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static void manual_hpte_clear_all(void)
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{
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unsigned long size_bytes = 1UL << ppc64_pft_size;
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unsigned long hpte_count = size_bytes >> 4;
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struct {
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unsigned long pteh;
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unsigned long ptel;
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} ptes[4];
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long lpar_rc;
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unsigned long i, j;
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/* Read in batches of 4,
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* invalidate only valid entries not in the VRMA
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* hpte_count will be a multiple of 4
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*/
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for (i = 0; i < hpte_count; i += 4) {
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lpar_rc = plpar_pte_read_4_raw(0, i, (void *)ptes);
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if (lpar_rc != H_SUCCESS)
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continue;
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for (j = 0; j < 4; j++){
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if ((ptes[j].pteh & HPTE_V_VRMA_MASK) ==
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HPTE_V_VRMA_MASK)
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continue;
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if (ptes[j].pteh & HPTE_V_VALID)
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plpar_pte_remove_raw(0, i + j, 0,
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&(ptes[j].pteh), &(ptes[j].ptel));
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}
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}
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}
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static int hcall_hpte_clear_all(void)
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{
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int rc;
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do {
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rc = plpar_hcall_norets(H_CLEAR_HPT);
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} while (rc == H_CONTINUE);
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return rc;
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}
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static void pseries_hpte_clear_all(void)
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{
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int rc;
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rc = hcall_hpte_clear_all();
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if (rc != H_SUCCESS)
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manual_hpte_clear_all();
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#ifdef __LITTLE_ENDIAN__
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/*
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* Reset exceptions to big endian.
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*
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* FIXME this is a hack for kexec, we need to reset the exception
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* endian before starting the new kernel and this is a convenient place
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* to do it.
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*
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* This is also called on boot when a fadump happens. In that case we
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* must not change the exception endian mode.
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*/
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if (firmware_has_feature(FW_FEATURE_SET_MODE) && !is_fadump_active())
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pseries_big_endian_exceptions();
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#endif
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}
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/*
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* NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and
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* the low 3 bits of flags happen to line up. So no transform is needed.
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* We can probably optimize here and assume the high bits of newpp are
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* already zero. For now I am paranoid.
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*/
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static long pSeries_lpar_hpte_updatepp(unsigned long slot,
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unsigned long newpp,
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unsigned long vpn,
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int psize, int apsize,
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int ssize, unsigned long inv_flags)
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{
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unsigned long lpar_rc;
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unsigned long flags = (newpp & 7) | H_AVPN;
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unsigned long want_v;
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want_v = hpte_encode_avpn(vpn, psize, ssize);
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pr_devel(" update: avpnv=%016lx, hash=%016lx, f=%lx, psize: %d ...",
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want_v, slot, flags, psize);
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lpar_rc = plpar_pte_protect(flags, slot, want_v);
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if (lpar_rc == H_NOT_FOUND) {
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pr_devel("not found !\n");
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return -1;
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}
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pr_devel("ok\n");
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BUG_ON(lpar_rc != H_SUCCESS);
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return 0;
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}
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static long __pSeries_lpar_hpte_find(unsigned long want_v, unsigned long hpte_group)
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{
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long lpar_rc;
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unsigned long i, j;
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struct {
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unsigned long pteh;
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unsigned long ptel;
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} ptes[4];
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for (i = 0; i < HPTES_PER_GROUP; i += 4, hpte_group += 4) {
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lpar_rc = plpar_pte_read_4(0, hpte_group, (void *)ptes);
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if (lpar_rc != H_SUCCESS)
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continue;
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for (j = 0; j < 4; j++) {
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if (HPTE_V_COMPARE(ptes[j].pteh, want_v) &&
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(ptes[j].pteh & HPTE_V_VALID))
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return i + j;
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}
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}
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return -1;
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}
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static long pSeries_lpar_hpte_find(unsigned long vpn, int psize, int ssize)
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{
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long slot;
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unsigned long hash;
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unsigned long want_v;
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unsigned long hpte_group;
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hash = hpt_hash(vpn, mmu_psize_defs[psize].shift, ssize);
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want_v = hpte_encode_avpn(vpn, psize, ssize);
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/* Bolted entries are always in the primary group */
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hpte_group = (hash & htab_hash_mask) * HPTES_PER_GROUP;
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slot = __pSeries_lpar_hpte_find(want_v, hpte_group);
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if (slot < 0)
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return -1;
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return hpte_group + slot;
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}
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static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp,
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unsigned long ea,
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int psize, int ssize)
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{
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unsigned long vpn;
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unsigned long lpar_rc, slot, vsid, flags;
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vsid = get_kernel_vsid(ea, ssize);
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vpn = hpt_vpn(ea, vsid, ssize);
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slot = pSeries_lpar_hpte_find(vpn, psize, ssize);
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BUG_ON(slot == -1);
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flags = newpp & 7;
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lpar_rc = plpar_pte_protect(flags, slot, 0);
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BUG_ON(lpar_rc != H_SUCCESS);
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}
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static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long vpn,
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int psize, int apsize,
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int ssize, int local)
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{
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unsigned long want_v;
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unsigned long lpar_rc;
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unsigned long dummy1, dummy2;
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pr_devel(" inval : slot=%lx, vpn=%016lx, psize: %d, local: %d\n",
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slot, vpn, psize, local);
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want_v = hpte_encode_avpn(vpn, psize, ssize);
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lpar_rc = plpar_pte_remove(H_AVPN, slot, want_v, &dummy1, &dummy2);
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if (lpar_rc == H_NOT_FOUND)
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return;
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BUG_ON(lpar_rc != H_SUCCESS);
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}
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#ifdef CONFIG_TRANSPARENT_HUGEPAGE
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/*
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* Limit iterations holding pSeries_lpar_tlbie_lock to 3. We also need
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* to make sure that we avoid bouncing the hypervisor tlbie lock.
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*/
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#define PPC64_HUGE_HPTE_BATCH 12
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static void __pSeries_lpar_hugepage_invalidate(unsigned long *slot,
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unsigned long *vpn, int count,
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int psize, int ssize)
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{
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unsigned long param[PLPAR_HCALL9_BUFSIZE];
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int i = 0, pix = 0, rc;
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unsigned long flags = 0;
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int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE);
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if (lock_tlbie)
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spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags);
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for (i = 0; i < count; i++) {
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if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) {
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pSeries_lpar_hpte_invalidate(slot[i], vpn[i], psize, 0,
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ssize, 0);
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} else {
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param[pix] = HBR_REQUEST | HBR_AVPN | slot[i];
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param[pix+1] = hpte_encode_avpn(vpn[i], psize, ssize);
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pix += 2;
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if (pix == 8) {
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rc = plpar_hcall9(H_BULK_REMOVE, param,
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param[0], param[1], param[2],
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param[3], param[4], param[5],
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param[6], param[7]);
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BUG_ON(rc != H_SUCCESS);
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pix = 0;
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}
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}
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}
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if (pix) {
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param[pix] = HBR_END;
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rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1],
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param[2], param[3], param[4], param[5],
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param[6], param[7]);
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BUG_ON(rc != H_SUCCESS);
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}
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if (lock_tlbie)
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spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags);
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}
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static void pSeries_lpar_hugepage_invalidate(unsigned long vsid,
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unsigned long addr,
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unsigned char *hpte_slot_array,
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int psize, int ssize, int local)
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{
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int i, index = 0;
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unsigned long s_addr = addr;
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unsigned int max_hpte_count, valid;
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unsigned long vpn_array[PPC64_HUGE_HPTE_BATCH];
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unsigned long slot_array[PPC64_HUGE_HPTE_BATCH];
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unsigned long shift, hidx, vpn = 0, hash, slot;
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shift = mmu_psize_defs[psize].shift;
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max_hpte_count = 1U << (PMD_SHIFT - shift);
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for (i = 0; i < max_hpte_count; i++) {
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valid = hpte_valid(hpte_slot_array, i);
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if (!valid)
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continue;
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hidx = hpte_hash_index(hpte_slot_array, i);
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/* get the vpn */
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addr = s_addr + (i * (1ul << shift));
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vpn = hpt_vpn(addr, vsid, ssize);
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hash = hpt_hash(vpn, shift, ssize);
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if (hidx & _PTEIDX_SECONDARY)
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hash = ~hash;
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slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
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slot += hidx & _PTEIDX_GROUP_IX;
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slot_array[index] = slot;
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vpn_array[index] = vpn;
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if (index == PPC64_HUGE_HPTE_BATCH - 1) {
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/*
|
|
* 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;
|
|
}
|
|
|
|
/*
|
|
* 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 hash, index, shift, hidx, slot;
|
|
real_pte_t pte;
|
|
int psize, ssize;
|
|
|
|
if (lock_tlbie)
|
|
spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags);
|
|
|
|
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) {
|
|
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;
|
|
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);
|
|
}
|
|
|
|
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)) {
|
|
printk(KERN_INFO "Disabling BULK_REMOVE firmware feature");
|
|
powerpc_firmware_features &= ~FW_FEATURE_BULK_REMOVE;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
__setup("bulk_remove=", disable_bulk_remove);
|
|
|
|
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;
|
|
}
|
|
|
|
#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) {
|
|
printk(KERN_INFO "cmo_free_hint: CMO free page hinting is not active.\n");
|
|
cmo_free_hint_flag = 0;
|
|
return 1;
|
|
}
|
|
|
|
cmo_free_hint_flag = 1;
|
|
printk(KERN_INFO "cmo_free_hint: CMO free page hinting is active.\n");
|
|
|
|
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_STD_MMU_64 */
|
|
|
|
#ifdef CONFIG_TRACEPOINTS
|
|
#ifdef HAVE_JUMP_LABEL
|
|
struct static_key hcall_tracepoint_key = STATIC_KEY_INIT;
|
|
|
|
void hcall_tracepoint_regfunc(void)
|
|
{
|
|
static_key_slow_inc(&hcall_tracepoint_key);
|
|
}
|
|
|
|
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;
|
|
|
|
void hcall_tracepoint_regfunc(void)
|
|
{
|
|
hcall_tracepoint_refcount++;
|
|
}
|
|
|
|
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, unsigned 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;
|
|
}
|