Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * pSeries_lpar.c |
| 3 | * Copyright (C) 2001 Todd Inglett, IBM Corporation |
| 4 | * |
| 5 | * pSeries LPAR support. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | */ |
| 21 | |
Michael Ellerman | f7ebf35 | 2008-04-24 15:13:19 +1000 | [diff] [blame] | 22 | /* Enables debugging of low-level hash table routines - careful! */ |
| 23 | #undef DEBUG |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/kernel.h> |
| 26 | #include <linux/dma-mapping.h> |
Benjamin Herrenschmidt | 463ce0e | 2005-11-23 17:56:06 +1100 | [diff] [blame] | 27 | #include <linux/console.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <asm/processor.h> |
| 29 | #include <asm/mmu.h> |
| 30 | #include <asm/page.h> |
| 31 | #include <asm/pgtable.h> |
| 32 | #include <asm/machdep.h> |
| 33 | #include <asm/abs_addr.h> |
| 34 | #include <asm/mmu_context.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <asm/iommu.h> |
| 36 | #include <asm/tlbflush.h> |
| 37 | #include <asm/tlb.h> |
| 38 | #include <asm/prom.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <asm/cputable.h> |
David Gibson | dcad47f | 2005-11-07 09:49:43 +1100 | [diff] [blame] | 40 | #include <asm/udbg.h> |
Paul Mackerras | 2249ca9 | 2005-11-07 13:18:13 +1100 | [diff] [blame] | 41 | #include <asm/smp.h> |
Anton Blanchard | c8cd093 | 2009-10-26 18:50:29 +0000 | [diff] [blame] | 42 | #include <asm/trace.h> |
Michael Ellerman | a121872 | 2005-11-03 15:33:31 +1100 | [diff] [blame] | 43 | |
| 44 | #include "plpar_wrappers.h" |
Michael Ellerman | 21cf913 | 2008-04-16 13:51:48 +1000 | [diff] [blame] | 45 | #include "pseries.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
Anton Blanchard | b9377ff | 2006-07-19 08:01:28 +1000 | [diff] [blame] | 48 | /* in hvCall.S */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | EXPORT_SYMBOL(plpar_hcall); |
Anton Blanchard | b9377ff | 2006-07-19 08:01:28 +1000 | [diff] [blame] | 50 | EXPORT_SYMBOL(plpar_hcall9); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | EXPORT_SYMBOL(plpar_hcall_norets); |
Anton Blanchard | b9377ff | 2006-07-19 08:01:28 +1000 | [diff] [blame] | 52 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | extern void pSeries_find_serial_port(void); |
| 54 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | void vpa_init(int cpu) |
| 56 | { |
| 57 | int hwcpu = get_hard_smp_processor_id(cpu); |
Michael Neuling | 2f6093c | 2006-08-07 16:19:19 +1000 | [diff] [blame] | 58 | unsigned long addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | long ret; |
Paul Mackerras | cf9efce | 2010-08-26 19:56:43 +0000 | [diff] [blame] | 60 | struct paca_struct *pp; |
| 61 | struct dtl_entry *dtl; |
Olof Johansson | 233ccd0 | 2005-09-03 15:55:59 -0700 | [diff] [blame] | 62 | |
| 63 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) |
Paul Mackerras | 8154c5d | 2010-08-12 20:18:15 +0000 | [diff] [blame] | 64 | lppaca_of(cpu).vmxregs_in_use = 1; |
Olof Johansson | 233ccd0 | 2005-09-03 15:55:59 -0700 | [diff] [blame] | 65 | |
Paul Mackerras | 8154c5d | 2010-08-12 20:18:15 +0000 | [diff] [blame] | 66 | addr = __pa(&lppaca_of(cpu)); |
Michael Neuling | 2f6093c | 2006-08-07 16:19:19 +1000 | [diff] [blame] | 67 | ret = register_vpa(hwcpu, addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
Michael Neuling | 2f6093c | 2006-08-07 16:19:19 +1000 | [diff] [blame] | 69 | if (ret) { |
Anton Blanchard | 711ef84 | 2011-07-25 01:46:33 +0000 | [diff] [blame] | 70 | pr_err("WARNING: VPA registration for cpu %d (hw %d) of area " |
| 71 | "%lx failed with %ld\n", cpu, hwcpu, addr, ret); |
Michael Neuling | 2f6093c | 2006-08-07 16:19:19 +1000 | [diff] [blame] | 72 | return; |
| 73 | } |
| 74 | /* |
| 75 | * PAPR says this feature is SLB-Buffer but firmware never |
| 76 | * reports that. All SPLPAR support SLB shadow buffer. |
| 77 | */ |
| 78 | addr = __pa(&slb_shadow[cpu]); |
| 79 | if (firmware_has_feature(FW_FEATURE_SPLPAR)) { |
| 80 | ret = register_slb_shadow(hwcpu, addr); |
| 81 | if (ret) |
Anton Blanchard | 711ef84 | 2011-07-25 01:46:33 +0000 | [diff] [blame] | 82 | pr_err("WARNING: SLB shadow buffer registration for " |
| 83 | "cpu %d (hw %d) of area %lx failed with %ld\n", |
| 84 | cpu, hwcpu, addr, ret); |
Michael Neuling | 2f6093c | 2006-08-07 16:19:19 +1000 | [diff] [blame] | 85 | } |
Paul Mackerras | cf9efce | 2010-08-26 19:56:43 +0000 | [diff] [blame] | 86 | |
| 87 | /* |
| 88 | * Register dispatch trace log, if one has been allocated. |
| 89 | */ |
| 90 | pp = &paca[cpu]; |
| 91 | dtl = pp->dispatch_log; |
| 92 | if (dtl) { |
| 93 | pp->dtl_ridx = 0; |
| 94 | pp->dtl_curr = dtl; |
| 95 | lppaca_of(cpu).dtl_idx = 0; |
| 96 | |
| 97 | /* hypervisor reads buffer length from this field */ |
| 98 | dtl->enqueue_to_dispatch_time = DISPATCH_LOG_BYTES; |
| 99 | ret = register_dtl(hwcpu, __pa(dtl)); |
| 100 | if (ret) |
Anton Blanchard | 711ef84 | 2011-07-25 01:46:33 +0000 | [diff] [blame] | 101 | pr_err("WARNING: DTL registration of cpu %d (hw %d) " |
| 102 | "failed with %ld\n", smp_processor_id(), |
| 103 | hwcpu, ret); |
Paul Mackerras | cf9efce | 2010-08-26 19:56:43 +0000 | [diff] [blame] | 104 | lppaca_of(cpu).dtl_enable_mask = 2; |
| 105 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | } |
| 107 | |
Geoff Levand | 035223f | 2006-10-05 11:35:10 -0700 | [diff] [blame] | 108 | static long pSeries_lpar_hpte_insert(unsigned long hpte_group, |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 109 | unsigned long va, unsigned long pa, |
| 110 | unsigned long rflags, unsigned long vflags, |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 111 | int psize, int ssize) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | unsigned long lpar_rc; |
| 114 | unsigned long flags; |
| 115 | unsigned long slot; |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 116 | unsigned long hpte_v, hpte_r; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 118 | if (!(vflags & HPTE_V_BOLTED)) |
Michael Ellerman | 551a232 | 2009-06-17 18:13:50 +0000 | [diff] [blame] | 119 | pr_devel("hpte_insert(group=%lx, va=%016lx, pa=%016lx, " |
Michael Ellerman | f7ebf35 | 2008-04-24 15:13:19 +1000 | [diff] [blame] | 120 | "rflags=%lx, vflags=%lx, psize=%d)\n", |
| 121 | hpte_group, va, pa, rflags, vflags, psize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 123 | hpte_v = hpte_encode_v(va, psize, ssize) | vflags | HPTE_V_VALID; |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 124 | hpte_r = hpte_encode_r(pa, psize) | rflags; |
| 125 | |
| 126 | if (!(vflags & HPTE_V_BOLTED)) |
Michael Ellerman | 551a232 | 2009-06-17 18:13:50 +0000 | [diff] [blame] | 127 | pr_devel(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 128 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | /* Now fill in the actual HPTE */ |
| 130 | /* Set CEC cookie to 0 */ |
| 131 | /* Zero page = 0 */ |
| 132 | /* I-cache Invalidate = 0 */ |
| 133 | /* I-cache synchronize = 0 */ |
| 134 | /* Exact = 0 */ |
| 135 | flags = 0; |
| 136 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 137 | /* Make pHyp happy */ |
Dave Kleikamp | 443dcac | 2008-07-10 01:28:07 +1000 | [diff] [blame] | 138 | if ((rflags & _PAGE_NO_CACHE) & !(rflags & _PAGE_WRITETHRU)) |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 139 | hpte_r &= ~_PAGE_COHERENT; |
Brian King | 9ee820f | 2011-05-04 16:01:20 +1000 | [diff] [blame] | 140 | if (firmware_has_feature(FW_FEATURE_XCMO) && !(hpte_r & HPTE_R_N)) |
| 141 | flags |= H_COALESCE_CAND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | |
Anton Blanchard | b9377ff | 2006-07-19 08:01:28 +1000 | [diff] [blame] | 143 | lpar_rc = plpar_pte_enter(flags, hpte_group, hpte_v, hpte_r, &slot); |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 144 | if (unlikely(lpar_rc == H_PTEG_FULL)) { |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 145 | if (!(vflags & HPTE_V_BOLTED)) |
Michael Ellerman | 551a232 | 2009-06-17 18:13:50 +0000 | [diff] [blame] | 146 | pr_devel(" full\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | return -1; |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 148 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | |
| 150 | /* |
| 151 | * Since we try and ioremap PHBs we don't own, the pte insert |
| 152 | * will fail. However we must catch the failure in hash_page |
| 153 | * or we will loop forever, so return -2 in this case. |
| 154 | */ |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 155 | if (unlikely(lpar_rc != H_SUCCESS)) { |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 156 | if (!(vflags & HPTE_V_BOLTED)) |
Michael Ellerman | 551a232 | 2009-06-17 18:13:50 +0000 | [diff] [blame] | 157 | pr_devel(" lpar err %lu\n", lpar_rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | return -2; |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 159 | } |
| 160 | if (!(vflags & HPTE_V_BOLTED)) |
Michael Ellerman | 551a232 | 2009-06-17 18:13:50 +0000 | [diff] [blame] | 161 | pr_devel(" -> slot: %lu\n", slot & 7); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | |
| 163 | /* Because of iSeries, we have to pass down the secondary |
| 164 | * bucket bit here as well |
| 165 | */ |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 166 | return (slot & 7) | (!!(vflags & HPTE_V_SECONDARY) << 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | } |
| 168 | |
| 169 | static DEFINE_SPINLOCK(pSeries_lpar_tlbie_lock); |
| 170 | |
| 171 | static long pSeries_lpar_hpte_remove(unsigned long hpte_group) |
| 172 | { |
| 173 | unsigned long slot_offset; |
| 174 | unsigned long lpar_rc; |
| 175 | int i; |
| 176 | unsigned long dummy1, dummy2; |
| 177 | |
| 178 | /* pick a random slot to start at */ |
| 179 | slot_offset = mftb() & 0x7; |
| 180 | |
| 181 | for (i = 0; i < HPTES_PER_GROUP; i++) { |
| 182 | |
| 183 | /* don't remove a bolted entry */ |
| 184 | lpar_rc = plpar_pte_remove(H_ANDCOND, hpte_group + slot_offset, |
| 185 | (0x1UL << 4), &dummy1, &dummy2); |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 186 | if (lpar_rc == H_SUCCESS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | return i; |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 188 | BUG_ON(lpar_rc != H_NOT_FOUND); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | |
| 190 | slot_offset++; |
| 191 | slot_offset &= 0x7; |
| 192 | } |
| 193 | |
| 194 | return -1; |
| 195 | } |
| 196 | |
| 197 | static void pSeries_lpar_hptab_clear(void) |
| 198 | { |
| 199 | unsigned long size_bytes = 1UL << ppc64_pft_size; |
| 200 | unsigned long hpte_count = size_bytes >> 4; |
Michael Neuling | d504bed | 2010-05-10 20:28:26 +0000 | [diff] [blame] | 201 | struct { |
| 202 | unsigned long pteh; |
| 203 | unsigned long ptel; |
| 204 | } ptes[4]; |
Sachin P. Sant | b7abc5c | 2007-06-14 15:31:34 +1000 | [diff] [blame] | 205 | long lpar_rc; |
Anton Blanchard | bed9a31 | 2011-07-26 18:15:03 +0000 | [diff] [blame] | 206 | unsigned long i, j; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | |
Michael Neuling | d504bed | 2010-05-10 20:28:26 +0000 | [diff] [blame] | 208 | /* Read in batches of 4, |
| 209 | * invalidate only valid entries not in the VRMA |
| 210 | * hpte_count will be a multiple of 4 |
| 211 | */ |
| 212 | for (i = 0; i < hpte_count; i += 4) { |
| 213 | lpar_rc = plpar_pte_read_4_raw(0, i, (void *)ptes); |
| 214 | if (lpar_rc != H_SUCCESS) |
| 215 | continue; |
| 216 | for (j = 0; j < 4; j++){ |
| 217 | if ((ptes[j].pteh & HPTE_V_VRMA_MASK) == |
| 218 | HPTE_V_VRMA_MASK) |
| 219 | continue; |
| 220 | if (ptes[j].pteh & HPTE_V_VALID) |
| 221 | plpar_pte_remove_raw(0, i + j, 0, |
| 222 | &(ptes[j].pteh), &(ptes[j].ptel)); |
Sachin P. Sant | b7abc5c | 2007-06-14 15:31:34 +1000 | [diff] [blame] | 223 | } |
| 224 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | } |
| 226 | |
| 227 | /* |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 228 | * This computes the AVPN and B fields of the first dword of a HPTE, |
| 229 | * for use when we want to match an existing PTE. The bottom 7 bits |
| 230 | * of the returned value are zero. |
| 231 | */ |
| 232 | static inline unsigned long hpte_encode_avpn(unsigned long va, int psize, |
| 233 | int ssize) |
| 234 | { |
| 235 | unsigned long v; |
| 236 | |
| 237 | v = (va >> 23) & ~(mmu_psize_defs[psize].avpnm); |
| 238 | v <<= HPTE_V_AVPN_SHIFT; |
| 239 | v |= ((unsigned long) ssize) << HPTE_V_SSIZE_SHIFT; |
| 240 | return v; |
| 241 | } |
| 242 | |
| 243 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | * NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and |
| 245 | * the low 3 bits of flags happen to line up. So no transform is needed. |
| 246 | * We can probably optimize here and assume the high bits of newpp are |
| 247 | * already zero. For now I am paranoid. |
| 248 | */ |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 249 | static long pSeries_lpar_hpte_updatepp(unsigned long slot, |
| 250 | unsigned long newpp, |
| 251 | unsigned long va, |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 252 | int psize, int ssize, int local) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | { |
| 254 | unsigned long lpar_rc; |
| 255 | unsigned long flags = (newpp & 7) | H_AVPN; |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 256 | unsigned long want_v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 258 | want_v = hpte_encode_avpn(va, psize, ssize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | |
Michael Ellerman | 551a232 | 2009-06-17 18:13:50 +0000 | [diff] [blame] | 260 | pr_devel(" update: avpnv=%016lx, hash=%016lx, f=%lx, psize: %d ...", |
Michael Ellerman | f7ebf35 | 2008-04-24 15:13:19 +1000 | [diff] [blame] | 261 | want_v, slot, flags, psize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 263 | lpar_rc = plpar_pte_protect(flags, slot, want_v); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 264 | |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 265 | if (lpar_rc == H_NOT_FOUND) { |
Michael Ellerman | 551a232 | 2009-06-17 18:13:50 +0000 | [diff] [blame] | 266 | pr_devel("not found !\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | return -1; |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 268 | } |
| 269 | |
Michael Ellerman | 551a232 | 2009-06-17 18:13:50 +0000 | [diff] [blame] | 270 | pr_devel("ok\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 272 | BUG_ON(lpar_rc != H_SUCCESS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | |
| 274 | return 0; |
| 275 | } |
| 276 | |
| 277 | static unsigned long pSeries_lpar_hpte_getword0(unsigned long slot) |
| 278 | { |
| 279 | unsigned long dword0; |
| 280 | unsigned long lpar_rc; |
| 281 | unsigned long dummy_word1; |
| 282 | unsigned long flags; |
| 283 | |
| 284 | /* Read 1 pte at a time */ |
| 285 | /* Do not need RPN to logical page translation */ |
| 286 | /* No cross CEC PFT access */ |
| 287 | flags = 0; |
| 288 | |
| 289 | lpar_rc = plpar_pte_read(flags, slot, &dword0, &dummy_word1); |
| 290 | |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 291 | BUG_ON(lpar_rc != H_SUCCESS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
| 293 | return dword0; |
| 294 | } |
| 295 | |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 296 | static long pSeries_lpar_hpte_find(unsigned long va, int psize, int ssize) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | { |
| 298 | unsigned long hash; |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 299 | unsigned long i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | long slot; |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 301 | unsigned long want_v, hpte_v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 303 | hash = hpt_hash(va, mmu_psize_defs[psize].shift, ssize); |
| 304 | want_v = hpte_encode_avpn(va, psize, ssize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 306 | /* Bolted entries are always in the primary group */ |
| 307 | slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; |
| 308 | for (i = 0; i < HPTES_PER_GROUP; i++) { |
| 309 | hpte_v = pSeries_lpar_hpte_getword0(slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 311 | if (HPTE_V_COMPARE(hpte_v, want_v) && (hpte_v & HPTE_V_VALID)) |
| 312 | /* HPTE matches */ |
| 313 | return slot; |
| 314 | ++slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | } |
| 316 | |
| 317 | return -1; |
| 318 | } |
| 319 | |
| 320 | static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp, |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 321 | unsigned long ea, |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 322 | int psize, int ssize) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | { |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 324 | unsigned long lpar_rc, slot, vsid, va, flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 326 | vsid = get_kernel_vsid(ea, ssize); |
| 327 | va = hpt_va(ea, vsid, ssize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 329 | slot = pSeries_lpar_hpte_find(va, psize, ssize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | BUG_ON(slot == -1); |
| 331 | |
| 332 | flags = newpp & 7; |
| 333 | lpar_rc = plpar_pte_protect(flags, slot, 0); |
| 334 | |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 335 | BUG_ON(lpar_rc != H_SUCCESS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | } |
| 337 | |
| 338 | static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long va, |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 339 | int psize, int ssize, int local) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | { |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 341 | unsigned long want_v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | unsigned long lpar_rc; |
| 343 | unsigned long dummy1, dummy2; |
| 344 | |
Michael Ellerman | 551a232 | 2009-06-17 18:13:50 +0000 | [diff] [blame] | 345 | pr_devel(" inval : slot=%lx, va=%016lx, psize: %d, local: %d\n", |
Michael Ellerman | f7ebf35 | 2008-04-24 15:13:19 +1000 | [diff] [blame] | 346 | slot, va, psize, local); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 348 | want_v = hpte_encode_avpn(va, psize, ssize); |
| 349 | lpar_rc = plpar_pte_remove(H_AVPN, slot, want_v, &dummy1, &dummy2); |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 350 | if (lpar_rc == H_NOT_FOUND) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | return; |
| 352 | |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 353 | BUG_ON(lpar_rc != H_SUCCESS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | } |
| 355 | |
Badari Pulavarty | f8c8803 | 2008-01-29 09:19:24 +1100 | [diff] [blame] | 356 | static void pSeries_lpar_hpte_removebolted(unsigned long ea, |
| 357 | int psize, int ssize) |
| 358 | { |
| 359 | unsigned long slot, vsid, va; |
| 360 | |
| 361 | vsid = get_kernel_vsid(ea, ssize); |
| 362 | va = hpt_va(ea, vsid, ssize); |
| 363 | |
| 364 | slot = pSeries_lpar_hpte_find(va, psize, ssize); |
| 365 | BUG_ON(slot == -1); |
| 366 | |
| 367 | pSeries_lpar_hpte_invalidate(slot, va, psize, ssize, 0); |
| 368 | } |
| 369 | |
Paul Mackerras | f03e64f | 2007-02-06 21:10:31 +1100 | [diff] [blame] | 370 | /* Flag bits for H_BULK_REMOVE */ |
| 371 | #define HBR_REQUEST 0x4000000000000000UL |
| 372 | #define HBR_RESPONSE 0x8000000000000000UL |
| 373 | #define HBR_END 0xc000000000000000UL |
| 374 | #define HBR_AVPN 0x0200000000000000UL |
| 375 | #define HBR_ANDCOND 0x0100000000000000UL |
| 376 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | /* |
| 378 | * Take a spinlock around flushes to avoid bouncing the hypervisor tlbie |
| 379 | * lock. |
| 380 | */ |
Geoff Levand | 035223f | 2006-10-05 11:35:10 -0700 | [diff] [blame] | 381 | static void pSeries_lpar_flush_hash_range(unsigned long number, int local) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | { |
Paul Mackerras | f03e64f | 2007-02-06 21:10:31 +1100 | [diff] [blame] | 383 | unsigned long i, pix, rc; |
Paul Mackerras | 12e86f9 | 2007-02-08 15:02:35 +1100 | [diff] [blame] | 384 | unsigned long flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch); |
Matt Evans | 44ae3ab | 2011-04-06 19:48:50 +0000 | [diff] [blame] | 386 | int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE); |
Paul Mackerras | f03e64f | 2007-02-06 21:10:31 +1100 | [diff] [blame] | 387 | unsigned long param[9]; |
| 388 | unsigned long va; |
| 389 | unsigned long hash, index, shift, hidx, slot; |
| 390 | real_pte_t pte; |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 391 | int psize, ssize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | |
| 393 | if (lock_tlbie) |
| 394 | spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags); |
| 395 | |
Paul Mackerras | f03e64f | 2007-02-06 21:10:31 +1100 | [diff] [blame] | 396 | psize = batch->psize; |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 397 | ssize = batch->ssize; |
Paul Mackerras | f03e64f | 2007-02-06 21:10:31 +1100 | [diff] [blame] | 398 | pix = 0; |
| 399 | for (i = 0; i < number; i++) { |
| 400 | va = batch->vaddr[i]; |
| 401 | pte = batch->pte[i]; |
| 402 | pte_iterate_hashed_subpages(pte, psize, va, index, shift) { |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 403 | hash = hpt_hash(va, shift, ssize); |
Paul Mackerras | f03e64f | 2007-02-06 21:10:31 +1100 | [diff] [blame] | 404 | hidx = __rpte_to_hidx(pte, index); |
| 405 | if (hidx & _PTEIDX_SECONDARY) |
| 406 | hash = ~hash; |
| 407 | slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; |
| 408 | slot += hidx & _PTEIDX_GROUP_IX; |
Paul Mackerras | 12e86f9 | 2007-02-08 15:02:35 +1100 | [diff] [blame] | 409 | if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) { |
| 410 | pSeries_lpar_hpte_invalidate(slot, va, psize, |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 411 | ssize, local); |
Paul Mackerras | 12e86f9 | 2007-02-08 15:02:35 +1100 | [diff] [blame] | 412 | } else { |
| 413 | param[pix] = HBR_REQUEST | HBR_AVPN | slot; |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 414 | param[pix+1] = hpte_encode_avpn(va, psize, |
| 415 | ssize); |
Paul Mackerras | 12e86f9 | 2007-02-08 15:02:35 +1100 | [diff] [blame] | 416 | pix += 2; |
| 417 | if (pix == 8) { |
| 418 | rc = plpar_hcall9(H_BULK_REMOVE, param, |
Paul Mackerras | f03e64f | 2007-02-06 21:10:31 +1100 | [diff] [blame] | 419 | param[0], param[1], param[2], |
| 420 | param[3], param[4], param[5], |
| 421 | param[6], param[7]); |
Paul Mackerras | 12e86f9 | 2007-02-08 15:02:35 +1100 | [diff] [blame] | 422 | BUG_ON(rc != H_SUCCESS); |
| 423 | pix = 0; |
| 424 | } |
Paul Mackerras | f03e64f | 2007-02-06 21:10:31 +1100 | [diff] [blame] | 425 | } |
| 426 | } pte_iterate_hashed_end(); |
| 427 | } |
| 428 | if (pix) { |
| 429 | param[pix] = HBR_END; |
| 430 | rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1], |
| 431 | param[2], param[3], param[4], param[5], |
| 432 | param[6], param[7]); |
| 433 | BUG_ON(rc != H_SUCCESS); |
| 434 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | |
| 436 | if (lock_tlbie) |
| 437 | spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags); |
| 438 | } |
| 439 | |
Will Schmidt | 4e89a2d | 2010-09-28 15:33:12 +0000 | [diff] [blame] | 440 | static int __init disable_bulk_remove(char *str) |
| 441 | { |
| 442 | if (strcmp(str, "off") == 0 && |
| 443 | firmware_has_feature(FW_FEATURE_BULK_REMOVE)) { |
| 444 | printk(KERN_INFO "Disabling BULK_REMOVE firmware feature"); |
| 445 | powerpc_firmware_features &= ~FW_FEATURE_BULK_REMOVE; |
| 446 | } |
| 447 | return 1; |
| 448 | } |
| 449 | |
| 450 | __setup("bulk_remove=", disable_bulk_remove); |
| 451 | |
Michael Ellerman | 7d0daae | 2006-06-23 18:16:38 +1000 | [diff] [blame] | 452 | void __init hpte_init_lpar(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | { |
| 454 | ppc_md.hpte_invalidate = pSeries_lpar_hpte_invalidate; |
| 455 | ppc_md.hpte_updatepp = pSeries_lpar_hpte_updatepp; |
| 456 | ppc_md.hpte_updateboltedpp = pSeries_lpar_hpte_updateboltedpp; |
| 457 | ppc_md.hpte_insert = pSeries_lpar_hpte_insert; |
| 458 | ppc_md.hpte_remove = pSeries_lpar_hpte_remove; |
Badari Pulavarty | f8c8803 | 2008-01-29 09:19:24 +1100 | [diff] [blame] | 459 | ppc_md.hpte_removebolted = pSeries_lpar_hpte_removebolted; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | ppc_md.flush_hash_range = pSeries_lpar_flush_hash_range; |
| 461 | ppc_md.hpte_clear_all = pSeries_lpar_hptab_clear; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | } |
Robert Jennings | 14f966e | 2009-04-15 05:55:32 +0000 | [diff] [blame] | 463 | |
| 464 | #ifdef CONFIG_PPC_SMLPAR |
| 465 | #define CMO_FREE_HINT_DEFAULT 1 |
| 466 | static int cmo_free_hint_flag = CMO_FREE_HINT_DEFAULT; |
| 467 | |
| 468 | static int __init cmo_free_hint(char *str) |
| 469 | { |
| 470 | char *parm; |
| 471 | parm = strstrip(str); |
| 472 | |
| 473 | if (strcasecmp(parm, "no") == 0 || strcasecmp(parm, "off") == 0) { |
| 474 | printk(KERN_INFO "cmo_free_hint: CMO free page hinting is not active.\n"); |
| 475 | cmo_free_hint_flag = 0; |
| 476 | return 1; |
| 477 | } |
| 478 | |
| 479 | cmo_free_hint_flag = 1; |
| 480 | printk(KERN_INFO "cmo_free_hint: CMO free page hinting is active.\n"); |
| 481 | |
| 482 | if (strcasecmp(parm, "yes") == 0 || strcasecmp(parm, "on") == 0) |
| 483 | return 1; |
| 484 | |
| 485 | return 0; |
| 486 | } |
| 487 | |
| 488 | __setup("cmo_free_hint=", cmo_free_hint); |
| 489 | |
| 490 | static void pSeries_set_page_state(struct page *page, int order, |
| 491 | unsigned long state) |
| 492 | { |
| 493 | int i, j; |
| 494 | unsigned long cmo_page_sz, addr; |
| 495 | |
| 496 | cmo_page_sz = cmo_get_page_size(); |
| 497 | addr = __pa((unsigned long)page_address(page)); |
| 498 | |
| 499 | for (i = 0; i < (1 << order); i++, addr += PAGE_SIZE) { |
| 500 | for (j = 0; j < PAGE_SIZE; j += cmo_page_sz) |
| 501 | plpar_hcall_norets(H_PAGE_INIT, state, addr + j, 0); |
| 502 | } |
| 503 | } |
| 504 | |
| 505 | void arch_free_page(struct page *page, int order) |
| 506 | { |
| 507 | if (!cmo_free_hint_flag || !firmware_has_feature(FW_FEATURE_CMO)) |
| 508 | return; |
| 509 | |
| 510 | pSeries_set_page_state(page, order, H_PAGE_SET_UNUSED); |
| 511 | } |
| 512 | EXPORT_SYMBOL(arch_free_page); |
| 513 | |
| 514 | #endif |
Anton Blanchard | c8cd093 | 2009-10-26 18:50:29 +0000 | [diff] [blame] | 515 | |
| 516 | #ifdef CONFIG_TRACEPOINTS |
| 517 | /* |
| 518 | * We optimise our hcall path by placing hcall_tracepoint_refcount |
| 519 | * directly in the TOC so we can check if the hcall tracepoints are |
| 520 | * enabled via a single load. |
| 521 | */ |
| 522 | |
| 523 | /* NB: reg/unreg are called while guarded with the tracepoints_mutex */ |
| 524 | extern long hcall_tracepoint_refcount; |
| 525 | |
Anton Blanchard | 57cdfdf | 2010-10-21 00:52:12 +0000 | [diff] [blame] | 526 | /* |
| 527 | * Since the tracing code might execute hcalls we need to guard against |
| 528 | * recursion. One example of this are spinlocks calling H_YIELD on |
| 529 | * shared processor partitions. |
| 530 | */ |
| 531 | static DEFINE_PER_CPU(unsigned int, hcall_trace_depth); |
| 532 | |
Anton Blanchard | c8cd093 | 2009-10-26 18:50:29 +0000 | [diff] [blame] | 533 | void hcall_tracepoint_regfunc(void) |
| 534 | { |
| 535 | hcall_tracepoint_refcount++; |
| 536 | } |
| 537 | |
| 538 | void hcall_tracepoint_unregfunc(void) |
| 539 | { |
| 540 | hcall_tracepoint_refcount--; |
| 541 | } |
| 542 | |
Anton Blanchard | 6f26353 | 2009-10-26 18:51:09 +0000 | [diff] [blame] | 543 | void __trace_hcall_entry(unsigned long opcode, unsigned long *args) |
Anton Blanchard | c8cd093 | 2009-10-26 18:50:29 +0000 | [diff] [blame] | 544 | { |
Anton Blanchard | 57cdfdf | 2010-10-21 00:52:12 +0000 | [diff] [blame] | 545 | unsigned long flags; |
| 546 | unsigned int *depth; |
| 547 | |
| 548 | local_irq_save(flags); |
| 549 | |
| 550 | depth = &__get_cpu_var(hcall_trace_depth); |
| 551 | |
| 552 | if (*depth) |
| 553 | goto out; |
| 554 | |
| 555 | (*depth)++; |
Anton Blanchard | 6f26353 | 2009-10-26 18:51:09 +0000 | [diff] [blame] | 556 | trace_hcall_entry(opcode, args); |
Anton Blanchard | 57cdfdf | 2010-10-21 00:52:12 +0000 | [diff] [blame] | 557 | (*depth)--; |
| 558 | |
| 559 | out: |
| 560 | local_irq_restore(flags); |
Anton Blanchard | c8cd093 | 2009-10-26 18:50:29 +0000 | [diff] [blame] | 561 | } |
| 562 | |
Anton Blanchard | 6f26353 | 2009-10-26 18:51:09 +0000 | [diff] [blame] | 563 | void __trace_hcall_exit(long opcode, unsigned long retval, |
| 564 | unsigned long *retbuf) |
Anton Blanchard | c8cd093 | 2009-10-26 18:50:29 +0000 | [diff] [blame] | 565 | { |
Anton Blanchard | 57cdfdf | 2010-10-21 00:52:12 +0000 | [diff] [blame] | 566 | unsigned long flags; |
| 567 | unsigned int *depth; |
| 568 | |
| 569 | local_irq_save(flags); |
| 570 | |
| 571 | depth = &__get_cpu_var(hcall_trace_depth); |
| 572 | |
| 573 | if (*depth) |
| 574 | goto out; |
| 575 | |
| 576 | (*depth)++; |
Anton Blanchard | 6f26353 | 2009-10-26 18:51:09 +0000 | [diff] [blame] | 577 | trace_hcall_exit(opcode, retval, retbuf); |
Anton Blanchard | 57cdfdf | 2010-10-21 00:52:12 +0000 | [diff] [blame] | 578 | (*depth)--; |
| 579 | |
| 580 | out: |
| 581 | local_irq_restore(flags); |
Anton Blanchard | c8cd093 | 2009-10-26 18:50:29 +0000 | [diff] [blame] | 582 | } |
| 583 | #endif |
Brian King | 9ee820f | 2011-05-04 16:01:20 +1000 | [diff] [blame] | 584 | |
| 585 | /** |
| 586 | * h_get_mpp |
| 587 | * H_GET_MPP hcall returns info in 7 parms |
| 588 | */ |
| 589 | int h_get_mpp(struct hvcall_mpp_data *mpp_data) |
| 590 | { |
| 591 | int rc; |
| 592 | unsigned long retbuf[PLPAR_HCALL9_BUFSIZE]; |
| 593 | |
| 594 | rc = plpar_hcall9(H_GET_MPP, retbuf); |
| 595 | |
| 596 | mpp_data->entitled_mem = retbuf[0]; |
| 597 | mpp_data->mapped_mem = retbuf[1]; |
| 598 | |
| 599 | mpp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff; |
| 600 | mpp_data->pool_num = retbuf[2] & 0xffff; |
| 601 | |
| 602 | mpp_data->mem_weight = (retbuf[3] >> 7 * 8) & 0xff; |
| 603 | mpp_data->unallocated_mem_weight = (retbuf[3] >> 6 * 8) & 0xff; |
| 604 | mpp_data->unallocated_entitlement = retbuf[3] & 0xffffffffffff; |
| 605 | |
| 606 | mpp_data->pool_size = retbuf[4]; |
| 607 | mpp_data->loan_request = retbuf[5]; |
| 608 | mpp_data->backing_mem = retbuf[6]; |
| 609 | |
| 610 | return rc; |
| 611 | } |
| 612 | EXPORT_SYMBOL(h_get_mpp); |
| 613 | |
| 614 | int h_get_mpp_x(struct hvcall_mpp_x_data *mpp_x_data) |
| 615 | { |
| 616 | int rc; |
| 617 | unsigned long retbuf[PLPAR_HCALL9_BUFSIZE] = { 0 }; |
| 618 | |
| 619 | rc = plpar_hcall9(H_GET_MPP_X, retbuf); |
| 620 | |
| 621 | mpp_x_data->coalesced_bytes = retbuf[0]; |
| 622 | mpp_x_data->pool_coalesced_bytes = retbuf[1]; |
| 623 | mpp_x_data->pool_purr_cycles = retbuf[2]; |
| 624 | mpp_x_data->pool_spurr_cycles = retbuf[3]; |
| 625 | |
| 626 | return rc; |
| 627 | } |