diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/powerpc/platforms/pseries/lpar.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/powerpc/platforms/pseries/lpar.c | 641 |
1 files changed, 0 insertions, 641 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/platforms/pseries/lpar.c b/ANDROID_3.4.5/arch/powerpc/platforms/pseries/lpar.c deleted file mode 100644 index 5f3ef876..00000000 --- a/ANDROID_3.4.5/arch/powerpc/platforms/pseries/lpar.c +++ /dev/null @@ -1,641 +0,0 @@ -/* - * pSeries_lpar.c - * Copyright (C) 2001 Todd Inglett, IBM Corporation - * - * pSeries LPAR support. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -/* Enables debugging of low-level hash table routines - careful! */ -#undef DEBUG - -#include <linux/kernel.h> -#include <linux/dma-mapping.h> -#include <linux/console.h> -#include <linux/export.h> -#include <asm/processor.h> -#include <asm/mmu.h> -#include <asm/page.h> -#include <asm/pgtable.h> -#include <asm/machdep.h> -#include <asm/abs_addr.h> -#include <asm/mmu_context.h> -#include <asm/iommu.h> -#include <asm/tlbflush.h> -#include <asm/tlb.h> -#include <asm/prom.h> -#include <asm/cputable.h> -#include <asm/udbg.h> -#include <asm/smp.h> -#include <asm/trace.h> -#include <asm/firmware.h> - -#include "plpar_wrappers.h" -#include "pseries.h" - - -/* in hvCall.S */ -EXPORT_SYMBOL(plpar_hcall); -EXPORT_SYMBOL(plpar_hcall9); -EXPORT_SYMBOL(plpar_hcall_norets); - -extern void pSeries_find_serial_port(void); - -void vpa_init(int cpu) -{ - int hwcpu = get_hard_smp_processor_id(cpu); - unsigned long addr; - long ret; - struct paca_struct *pp; - struct dtl_entry *dtl; - - if (cpu_has_feature(CPU_FTR_ALTIVEC)) - lppaca_of(cpu).vmxregs_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; - } - /* - * PAPR says this feature is SLB-Buffer but firmware never - * reports that. All SPLPAR support SLB shadow buffer. - */ - addr = __pa(&slb_shadow[cpu]); - if (firmware_has_feature(FW_FEATURE_SPLPAR)) { - 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); - } - - /* - * Register dispatch trace log, if one has been allocated. - */ - pp = &paca[cpu]; - dtl = pp->dispatch_log; - if (dtl) { - pp->dtl_ridx = 0; - pp->dtl_curr = dtl; - lppaca_of(cpu).dtl_idx = 0; - - /* hypervisor reads buffer length from this field */ - dtl->enqueue_to_dispatch_time = DISPATCH_LOG_BYTES; - ret = register_dtl(hwcpu, __pa(dtl)); - if (ret) - pr_err("WARNING: DTL registration of cpu %d (hw %d) " - "failed with %ld\n", smp_processor_id(), - hwcpu, ret); - lppaca_of(cpu).dtl_enable_mask = 2; - } -} - -static long pSeries_lpar_hpte_insert(unsigned long hpte_group, - unsigned long va, unsigned long pa, - unsigned long rflags, unsigned long vflags, - int psize, 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, va=%016lx, pa=%016lx, " - "rflags=%lx, vflags=%lx, psize=%d)\n", - hpte_group, va, pa, rflags, vflags, psize); - - hpte_v = hpte_encode_v(va, psize, ssize) | vflags | HPTE_V_VALID; - hpte_r = hpte_encode_r(pa, psize) | 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; - - /* Make pHyp happy */ - if ((rflags & _PAGE_NO_CACHE) & !(rflags & _PAGE_WRITETHRU)) - hpte_r &= ~_PAGE_COHERENT; - 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)) { - if (!(vflags & HPTE_V_BOLTED)) - pr_devel(" 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)) { - if (!(vflags & HPTE_V_BOLTED)) - pr_devel(" lpar err %lu\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, - (0x1UL << 4), &dummy1, &dummy2); - if (lpar_rc == H_SUCCESS) - return i; - BUG_ON(lpar_rc != H_NOT_FOUND); - - slot_offset++; - slot_offset &= 0x7; - } - - return -1; -} - -static void pSeries_lpar_hptab_clear(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) - 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)); - } - } -} - -/* - * This computes the AVPN and B fields of the first dword of a HPTE, - * for use when we want to match an existing PTE. The bottom 7 bits - * of the returned value are zero. - */ -static inline unsigned long hpte_encode_avpn(unsigned long va, int psize, - int ssize) -{ - unsigned long v; - - v = (va >> 23) & ~(mmu_psize_defs[psize].avpnm); - v <<= HPTE_V_AVPN_SHIFT; - v |= ((unsigned long) ssize) << HPTE_V_SSIZE_SHIFT; - return v; -} - -/* - * 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 va, - int psize, int ssize, int local) -{ - unsigned long lpar_rc; - unsigned long flags = (newpp & 7) | H_AVPN; - unsigned long want_v; - - want_v = hpte_encode_avpn(va, psize, ssize); - - 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 unsigned long pSeries_lpar_hpte_getword0(unsigned long slot) -{ - unsigned long dword0; - unsigned long lpar_rc; - unsigned long dummy_word1; - unsigned long flags; - - /* Read 1 pte at a time */ - /* Do not need RPN to logical page translation */ - /* No cross CEC PFT access */ - flags = 0; - - lpar_rc = plpar_pte_read(flags, slot, &dword0, &dummy_word1); - - BUG_ON(lpar_rc != H_SUCCESS); - - return dword0; -} - -static long pSeries_lpar_hpte_find(unsigned long va, int psize, int ssize) -{ - unsigned long hash; - unsigned long i; - long slot; - unsigned long want_v, hpte_v; - - hash = hpt_hash(va, mmu_psize_defs[psize].shift, ssize); - want_v = hpte_encode_avpn(va, psize, ssize); - - /* Bolted entries are always in the primary group */ - slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; - for (i = 0; i < HPTES_PER_GROUP; i++) { - hpte_v = pSeries_lpar_hpte_getword0(slot); - - if (HPTE_V_COMPARE(hpte_v, want_v) && (hpte_v & HPTE_V_VALID)) - /* HPTE matches */ - return slot; - ++slot; - } - - return -1; -} - -static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp, - unsigned long ea, - int psize, int ssize) -{ - unsigned long lpar_rc, slot, vsid, va, flags; - - vsid = get_kernel_vsid(ea, ssize); - va = hpt_va(ea, vsid, ssize); - - slot = pSeries_lpar_hpte_find(va, psize, ssize); - BUG_ON(slot == -1); - - flags = newpp & 7; - 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 va, - int psize, int ssize, int local) -{ - unsigned long want_v; - unsigned long lpar_rc; - unsigned long dummy1, dummy2; - - pr_devel(" inval : slot=%lx, va=%016lx, psize: %d, local: %d\n", - slot, va, psize, local); - - want_v = hpte_encode_avpn(va, 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); -} - -static void pSeries_lpar_hpte_removebolted(unsigned long ea, - int psize, int ssize) -{ - unsigned long slot, vsid, va; - - vsid = get_kernel_vsid(ea, ssize); - va = hpt_va(ea, vsid, ssize); - - slot = pSeries_lpar_hpte_find(va, psize, ssize); - BUG_ON(slot == -1); - - pSeries_lpar_hpte_invalidate(slot, va, psize, ssize, 0); -} - -/* Flag bits for H_BULK_REMOVE */ -#define HBR_REQUEST 0x4000000000000000UL -#define HBR_RESPONSE 0x8000000000000000UL -#define HBR_END 0xc000000000000000UL -#define HBR_AVPN 0x0200000000000000UL -#define HBR_ANDCOND 0x0100000000000000UL - -/* - * 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 i, pix, rc; - unsigned long flags = 0; - struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch); - int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE); - unsigned long param[9]; - unsigned long va; - 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++) { - va = batch->vaddr[i]; - pte = batch->pte[i]; - pte_iterate_hashed_subpages(pte, psize, va, index, shift) { - hash = hpt_hash(va, 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)) { - pSeries_lpar_hpte_invalidate(slot, va, psize, - ssize, local); - } else { - param[pix] = HBR_REQUEST | HBR_AVPN | slot; - param[pix+1] = hpte_encode_avpn(va, 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_lpar(void) -{ - ppc_md.hpte_invalidate = pSeries_lpar_hpte_invalidate; - ppc_md.hpte_updatepp = pSeries_lpar_hpte_updatepp; - ppc_md.hpte_updateboltedpp = pSeries_lpar_hpte_updateboltedpp; - ppc_md.hpte_insert = pSeries_lpar_hpte_insert; - ppc_md.hpte_remove = pSeries_lpar_hpte_remove; - ppc_md.hpte_removebolted = pSeries_lpar_hpte_removebolted; - ppc_md.flush_hash_range = pSeries_lpar_flush_hash_range; - ppc_md.hpte_clear_all = pSeries_lpar_hptab_clear; -} - -#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 (!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 - -#ifdef CONFIG_TRACEPOINTS -/* - * 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; - -/* - * 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 hcall_tracepoint_regfunc(void) -{ - hcall_tracepoint_refcount++; -} - -void hcall_tracepoint_unregfunc(void) -{ - hcall_tracepoint_refcount--; -} - -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 = &__get_cpu_var(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 = &__get_cpu_var(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] & 0xffffffffffff; - - 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; -} |