diff options
Diffstat (limited to 'arch/powerpc/platforms/pseries/lpar.c')
| -rw-r--r-- | arch/powerpc/platforms/pseries/lpar.c | 857 |
1 files changed, 543 insertions, 314 deletions
diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c index ab0c6dd6ec9..b02af9ef3ff 100644 --- a/arch/powerpc/platforms/pseries/lpar.c +++ b/arch/powerpc/platforms/pseries/lpar.c @@ -19,295 +19,129 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ -#undef DEBUG_LOW +/* Enables debugging of low-level hash table routines - careful! */ +#undef DEBUG -#include <linux/config.h> #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/ppcdebug.h> #include <asm/iommu.h> #include <asm/tlbflush.h> #include <asm/tlb.h> #include <asm/prom.h> -#include <asm/abs_addr.h> #include <asm/cputable.h> +#include <asm/udbg.h> +#include <asm/smp.h> +#include <asm/trace.h> +#include <asm/firmware.h> +#include <asm/plpar_wrappers.h> -#include "plpar_wrappers.h" +#include "pseries.h" + +/* 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 -#ifdef DEBUG_LOW -#define DBG_LOW(fmt...) do { udbg_printf(fmt); } while(0) -#else -#define DBG_LOW(fmt...) do { } while(0) -#endif -/* in pSeries_hvCall.S */ +/* in hvCall.S */ EXPORT_SYMBOL(plpar_hcall); -EXPORT_SYMBOL(plpar_hcall_4out); +EXPORT_SYMBOL(plpar_hcall9); EXPORT_SYMBOL(plpar_hcall_norets); -EXPORT_SYMBOL(plpar_hcall_8arg_2ret); extern void pSeries_find_serial_port(void); - -int vtermno; /* virtual terminal# for udbg */ - -#define __ALIGNED__ __attribute__((__aligned__(sizeof(long)))) -static void udbg_hvsi_putc(unsigned char c) +void vpa_init(int cpu) { - /* packet's seqno isn't used anyways */ - uint8_t packet[] __ALIGNED__ = { 0xff, 5, 0, 0, c }; - int rc; - - if (c == '\n') - udbg_hvsi_putc('\r'); - - do { - rc = plpar_put_term_char(vtermno, sizeof(packet), packet); - } while (rc == H_Busy); -} - -static long hvsi_udbg_buf_len; -static uint8_t hvsi_udbg_buf[256]; + int hwcpu = get_hard_smp_processor_id(cpu); + unsigned long addr; + long ret; + struct paca_struct *pp; + struct dtl_entry *dtl; -static int udbg_hvsi_getc_poll(void) -{ - unsigned char ch; - int rc, i; - - if (hvsi_udbg_buf_len == 0) { - rc = plpar_get_term_char(vtermno, &hvsi_udbg_buf_len, hvsi_udbg_buf); - if (rc != H_Success || hvsi_udbg_buf[0] != 0xff) { - /* bad read or non-data packet */ - hvsi_udbg_buf_len = 0; - } else { - /* remove the packet header */ - for (i = 4; i < hvsi_udbg_buf_len; i++) - hvsi_udbg_buf[i-4] = hvsi_udbg_buf[i]; - hvsi_udbg_buf_len -= 4; - } - } + /* + * The spec says it "may be problematic" if CPU x registers the VPA of + * CPU y. We should never do that, but wail if we ever do. + */ + WARN_ON(cpu != smp_processor_id()); - if (hvsi_udbg_buf_len <= 0 || hvsi_udbg_buf_len > 256) { - /* no data ready */ - hvsi_udbg_buf_len = 0; - return -1; - } + if (cpu_has_feature(CPU_FTR_ALTIVEC)) + lppaca_of(cpu).vmxregs_in_use = 1; - ch = hvsi_udbg_buf[0]; - /* shift remaining data down */ - for (i = 1; i < hvsi_udbg_buf_len; i++) { - hvsi_udbg_buf[i-1] = hvsi_udbg_buf[i]; - } - hvsi_udbg_buf_len--; + if (cpu_has_feature(CPU_FTR_ARCH_207S)) + lppaca_of(cpu).ebb_regs_in_use = 1; - return ch; -} + addr = __pa(&lppaca_of(cpu)); + ret = register_vpa(hwcpu, addr); -static unsigned char udbg_hvsi_getc(void) -{ - int ch; - for (;;) { - ch = udbg_hvsi_getc_poll(); - if (ch == -1) { - /* This shouldn't be needed...but... */ - volatile unsigned long delay; - for (delay=0; delay < 2000000; delay++) - ; - } else { - return ch; - } + if (ret) { + pr_err("WARNING: VPA registration for cpu %d (hw %d) of area " + "%lx failed with %ld\n", cpu, hwcpu, addr, ret); + return; } -} - -static void udbg_putcLP(unsigned char c) -{ - char buf[16]; - unsigned long rc; - - if (c == '\n') - udbg_putcLP('\r'); - - buf[0] = c; - do { - rc = plpar_put_term_char(vtermno, 1, buf); - } while(rc == H_Busy); -} - -/* Buffered chars getc */ -static long inbuflen; -static long inbuf[2]; /* must be 2 longs */ - -static int udbg_getc_pollLP(void) -{ - /* The interface is tricky because it may return up to 16 chars. - * We save them statically for future calls to udbg_getc(). + /* + * PAPR says this feature is SLB-Buffer but firmware never + * reports that. All SPLPAR support SLB shadow buffer. */ - char ch, *buf = (char *)inbuf; - int i; - long rc; - if (inbuflen == 0) { - /* get some more chars. */ - inbuflen = 0; - rc = plpar_get_term_char(vtermno, &inbuflen, buf); - if (rc != H_Success) - inbuflen = 0; /* otherwise inbuflen is garbage */ - } - if (inbuflen <= 0 || inbuflen > 16) { - /* Catch error case as well as other oddities (corruption) */ - inbuflen = 0; - return -1; - } - ch = buf[0]; - for (i = 1; i < inbuflen; i++) /* shuffle them down. */ - buf[i-1] = buf[i]; - inbuflen--; - return ch; -} - -static unsigned char udbg_getcLP(void) -{ - int ch; - for (;;) { - ch = udbg_getc_pollLP(); - if (ch == -1) { - /* This shouldn't be needed...but... */ - volatile unsigned long delay; - for (delay=0; delay < 2000000; delay++) - ; - } else { - return ch; - } - } -} - -/* call this from early_init() for a working debug console on - * vterm capable LPAR machines - */ -void udbg_init_debug_lpar(void) -{ - vtermno = 0; - udbg_putc = udbg_putcLP; - udbg_getc = udbg_getcLP; - udbg_getc_poll = udbg_getc_pollLP; -} - -/* returns 0 if couldn't find or use /chosen/stdout as console */ -int find_udbg_vterm(void) -{ - struct device_node *stdout_node; - u32 *termno; - char *name; - int found = 0; - - /* find the boot console from /chosen/stdout */ - if (!of_chosen) - return 0; - name = (char *)get_property(of_chosen, "linux,stdout-path", NULL); - if (name == NULL) - return 0; - stdout_node = of_find_node_by_path(name); - if (!stdout_node) - return 0; - - /* now we have the stdout node; figure out what type of device it is. */ - name = (char *)get_property(stdout_node, "name", NULL); - if (!name) { - printk(KERN_WARNING "stdout node missing 'name' property!\n"); - goto out; + addr = __pa(paca[cpu].slb_shadow_ptr); + 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); } - if (strncmp(name, "vty", 3) == 0) { - if (device_is_compatible(stdout_node, "hvterm1")) { - termno = (u32 *)get_property(stdout_node, "reg", NULL); - if (termno) { - vtermno = termno[0]; - udbg_putc = udbg_putcLP; - udbg_getc = udbg_getcLP; - udbg_getc_poll = udbg_getc_pollLP; - found = 1; - } - } else if (device_is_compatible(stdout_node, "hvterm-protocol")) { - termno = (u32 *)get_property(stdout_node, "reg", NULL); - if (termno) { - vtermno = termno[0]; - udbg_putc = udbg_hvsi_putc; - udbg_getc = udbg_hvsi_getc; - udbg_getc_poll = udbg_hvsi_getc_poll; - found = 1; - } - } - } else if (strncmp(name, "serial", 6)) { - /* XXX fix ISA serial console */ - printk(KERN_WARNING "serial stdout on LPAR ('%s')! " - "can't print udbg messages\n", - stdout_node->full_name); - } else { - printk(KERN_WARNING "don't know how to print to stdout '%s'\n", - stdout_node->full_name); + /* + * 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 = cpu_to_be32(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; } - -out: - of_node_put(stdout_node); - return found; -} - -void vpa_init(int cpu) -{ - int hwcpu = get_hard_smp_processor_id(cpu); - unsigned long vpa = __pa(&paca[cpu].lppaca); - long ret; - - if (cpu_has_feature(CPU_FTR_ALTIVEC)) - paca[cpu].lppaca.vmxregs_in_use = 1; - - ret = register_vpa(hwcpu, vpa); - - if (ret) - printk(KERN_ERR "WARNING: vpa_init: VPA registration for " - "cpu %d (hw %d) of area %lx returns %ld\n", - cpu, hwcpu, vpa, ret); } -long pSeries_lpar_hpte_insert(unsigned long hpte_group, - unsigned long va, unsigned long pa, - unsigned long rflags, unsigned long vflags, - int psize) +static long pSeries_lpar_hpte_insert(unsigned long hpte_group, + unsigned long vpn, unsigned long pa, + unsigned long rflags, unsigned long vflags, + int psize, int apsize, int ssize) { unsigned long lpar_rc; unsigned long flags; unsigned long slot; unsigned long hpte_v, hpte_r; - unsigned long dummy0, dummy1; if (!(vflags & HPTE_V_BOLTED)) - DBG_LOW("hpte_insert(group=%lx, va=%016lx, pa=%016lx, " - "rflags=%lx, vflags=%lx, psize=%d)\n", - hpte_group, va, pa, rflags, vflags, psize); + pr_devel("hpte_insert(group=%lx, vpn=%016lx, " + "pa=%016lx, rflags=%lx, vflags=%lx, psize=%d)\n", + hpte_group, vpn, pa, rflags, vflags, psize); - hpte_v = hpte_encode_v(va, psize) | vflags | HPTE_V_VALID; - hpte_r = hpte_encode_r(pa, psize) | rflags; + hpte_v = hpte_encode_v(vpn, psize, apsize, ssize) | vflags | HPTE_V_VALID; + hpte_r = hpte_encode_r(pa, psize, apsize) | rflags; if (!(vflags & HPTE_V_BOLTED)) - DBG_LOW(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r); - -#if 1 - { - int i; - for (i=0;i<8;i++) { - unsigned long w0, w1; - plpar_pte_read(0, hpte_group, &w0, &w1); - BUG_ON (HPTE_V_COMPARE(hpte_v, w0) - && (w0 & HPTE_V_VALID)); - } - } -#endif + pr_devel(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r); /* Now fill in the actual HPTE */ /* Set CEC cookie to 0 */ @@ -318,14 +152,16 @@ long pSeries_lpar_hpte_insert(unsigned long hpte_group, flags = 0; /* Make pHyp happy */ - if (rflags & (_PAGE_GUARDED|_PAGE_NO_CACHE)) - hpte_r &= ~_PAGE_COHERENT; + if ((rflags & _PAGE_NO_CACHE) && !(rflags & _PAGE_WRITETHRU)) + hpte_r &= ~HPTE_R_M; + + if (firmware_has_feature(FW_FEATURE_XCMO) && !(hpte_r & HPTE_R_N)) + flags |= H_COALESCE_CAND; - lpar_rc = plpar_hcall(H_ENTER, flags, hpte_group, hpte_v, - hpte_r, &slot, &dummy0, &dummy1); - if (unlikely(lpar_rc == H_PTEG_Full)) { + 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)) - DBG_LOW(" full\n"); + pr_devel(" full\n"); return -1; } @@ -334,13 +170,13 @@ long pSeries_lpar_hpte_insert(unsigned long hpte_group, * 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 (unlikely(lpar_rc != H_SUCCESS)) { if (!(vflags & HPTE_V_BOLTED)) - DBG_LOW(" lpar err %d\n", lpar_rc); + pr_devel(" lpar err %ld\n", lpar_rc); return -2; } if (!(vflags & HPTE_V_BOLTED)) - DBG_LOW(" -> slot: %d\n", slot & 7); + pr_devel(" -> slot: %lu\n", slot & 7); /* Because of iSeries, we have to pass down the secondary * bucket bit here as well @@ -365,9 +201,15 @@ static long pSeries_lpar_hpte_remove(unsigned long hpte_group) /* 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) + if (lpar_rc == H_SUCCESS) return i; - BUG_ON(lpar_rc != H_Not_Found); + + /* + * The test for adjunct partition is performed before the + * ANDCOND test. H_RESOURCE may be returned, so we need to + * check for that as well. + */ + BUG_ON(lpar_rc != H_NOT_FOUND && lpar_rc != H_RESOURCE); slot_offset++; slot_offset &= 0x7; @@ -380,12 +222,47 @@ static void pSeries_lpar_hptab_clear(void) { unsigned long size_bytes = 1UL << ppc64_pft_size; unsigned long hpte_count = size_bytes >> 4; - unsigned long dummy1, dummy2; - int i; + 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)); + } + } - /* TODO: Use bulk call */ - for (i = 0; i < hpte_count; i++) - plpar_pte_remove(0, i, 0, &dummy1, &dummy2); +#ifdef __LITTLE_ENDIAN__ + /* Reset exceptions to big endian */ + if (firmware_has_feature(FW_FEATURE_SET_MODE)) { + long rc; + + rc = pseries_big_endian_exceptions(); + /* + * At this point it is unlikely panic() will get anything + * out to the user, but at least this will stop us from + * continuing on further and creating an even more + * difficult to debug situation. + */ + if (rc) + panic("Could not enable big endian exceptions"); + } +#endif } /* @@ -396,28 +273,29 @@ static void pSeries_lpar_hptab_clear(void) */ static long pSeries_lpar_hpte_updatepp(unsigned long slot, unsigned long newpp, - unsigned long va, - int psize, int local) + unsigned long vpn, + int psize, int apsize, + int ssize, int local) { unsigned long lpar_rc; unsigned long flags = (newpp & 7) | H_AVPN; unsigned long want_v; - want_v = hpte_encode_v(va, psize); + want_v = hpte_encode_avpn(vpn, psize, ssize); - DBG_LOW(" update: avpnv=%016lx, hash=%016lx, f=%x, psize: %d ... ", - want_v & HPTE_V_AVPN, slot, flags, psize); + 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 & HPTE_V_AVPN); + lpar_rc = plpar_pte_protect(flags, slot, want_v); - if (lpar_rc == H_Not_Found) { - DBG_LOW("not found !\n"); + if (lpar_rc == H_NOT_FOUND) { + pr_devel("not found !\n"); return -1; } - DBG_LOW("ok\n"); + pr_devel("ok\n"); - BUG_ON(lpar_rc != H_Success); + BUG_ON(lpar_rc != H_SUCCESS); return 0; } @@ -436,37 +314,30 @@ static unsigned long pSeries_lpar_hpte_getword0(unsigned long slot) lpar_rc = plpar_pte_read(flags, slot, &dword0, &dummy_word1); - BUG_ON(lpar_rc != H_Success); + BUG_ON(lpar_rc != H_SUCCESS); return dword0; } -static long pSeries_lpar_hpte_find(unsigned long va, int psize) +static long pSeries_lpar_hpte_find(unsigned long vpn, int psize, int ssize) { unsigned long hash; - unsigned long i, j; + unsigned long i; long slot; unsigned long want_v, hpte_v; - hash = hpt_hash(va, mmu_psize_defs[psize].shift); - want_v = hpte_encode_v(va, psize); + hash = hpt_hash(vpn, mmu_psize_defs[psize].shift, ssize); + want_v = hpte_encode_avpn(vpn, psize, ssize); - for (j = 0; j < 2; j++) { - 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_v & HPTE_V_SECONDARY) == j)) { - /* HPTE matches */ - if (j) - slot = -slot; - return slot; - } - ++slot; - } - hash = ~hash; + /* 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; @@ -474,72 +345,430 @@ static long pSeries_lpar_hpte_find(unsigned long va, int psize) static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp, unsigned long ea, - int psize) + int psize, int ssize) { - unsigned long lpar_rc, slot, vsid, va, flags; + unsigned long vpn; + unsigned long lpar_rc, slot, vsid, flags; - vsid = get_kernel_vsid(ea); - va = (vsid << 28) | (ea & 0x0fffffff); + vsid = get_kernel_vsid(ea, ssize); + vpn = hpt_vpn(ea, vsid, ssize); - slot = pSeries_lpar_hpte_find(va, psize); + slot = pSeries_lpar_hpte_find(vpn, psize, ssize); BUG_ON(slot == -1); flags = newpp & 7; lpar_rc = plpar_pte_protect(flags, slot, 0); - BUG_ON(lpar_rc != H_Success); + BUG_ON(lpar_rc != H_SUCCESS); } -static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long va, - int psize, int local) +static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long vpn, + int psize, int apsize, + int ssize, int local) { unsigned long want_v; unsigned long lpar_rc; unsigned long dummy1, dummy2; - DBG_LOW(" inval : slot=%lx, va=%016lx, psize: %d, local: %d", - slot, va, psize, local); + pr_devel(" inval : slot=%lx, vpn=%016lx, psize: %d, local: %d\n", + slot, vpn, psize, local); - want_v = hpte_encode_v(va, psize); - lpar_rc = plpar_pte_remove(H_AVPN, slot, want_v & HPTE_V_AVPN, - &dummy1, &dummy2); - if (lpar_rc == H_Not_Found) + want_v = hpte_encode_avpn(vpn, psize, ssize); + lpar_rc = plpar_pte_remove(H_AVPN, slot, want_v, &dummy1, &dummy2); + if (lpar_rc == H_NOT_FOUND) return; - BUG_ON(lpar_rc != H_Success); + BUG_ON(lpar_rc != H_SUCCESS); +} + +/* + * Limit iterations holding pSeries_lpar_tlbie_lock to 3. We also need + * to make sure that we avoid bouncing the hypervisor tlbie lock. + */ +#define PPC64_HUGE_HPTE_BATCH 12 + +static void __pSeries_lpar_hugepage_invalidate(unsigned long *slot, + unsigned long *vpn, int count, + int psize, int ssize) +{ + unsigned long param[8]; + int i = 0, pix = 0, rc; + unsigned long flags = 0; + int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE); + + if (lock_tlbie) + spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags); + + for (i = 0; i < count; i++) { + + if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) { + pSeries_lpar_hpte_invalidate(slot[i], vpn[i], psize, 0, + ssize, 0); + } else { + param[pix] = HBR_REQUEST | HBR_AVPN | slot[i]; + param[pix+1] = hpte_encode_avpn(vpn[i], psize, ssize); + pix += 2; + if (pix == 8) { + rc = plpar_hcall9(H_BULK_REMOVE, param, + param[0], param[1], param[2], + param[3], param[4], param[5], + param[6], param[7]); + BUG_ON(rc != H_SUCCESS); + pix = 0; + } + } + } + if (pix) { + param[pix] = HBR_END; + rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1], + param[2], param[3], param[4], param[5], + param[6], param[7]); + BUG_ON(rc != H_SUCCESS); + } + + if (lock_tlbie) + spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags); +} + +static void pSeries_lpar_hugepage_invalidate(struct mm_struct *mm, + unsigned char *hpte_slot_array, + unsigned long addr, int psize) +{ + int ssize = 0, i, index = 0; + unsigned long s_addr = addr; + unsigned int max_hpte_count, valid; + unsigned long vpn_array[PPC64_HUGE_HPTE_BATCH]; + unsigned long slot_array[PPC64_HUGE_HPTE_BATCH]; + unsigned long shift, hidx, vpn = 0, vsid, hash, slot; + + shift = mmu_psize_defs[psize].shift; + max_hpte_count = 1U << (PMD_SHIFT - shift); + + for (i = 0; i < max_hpte_count; i++) { + valid = hpte_valid(hpte_slot_array, i); + if (!valid) + continue; + hidx = hpte_hash_index(hpte_slot_array, i); + + /* get the vpn */ + addr = s_addr + (i * (1ul << shift)); + if (!is_kernel_addr(addr)) { + ssize = user_segment_size(addr); + vsid = get_vsid(mm->context.id, addr, ssize); + WARN_ON(vsid == 0); + } else { + vsid = get_kernel_vsid(addr, mmu_kernel_ssize); + ssize = mmu_kernel_ssize; + } + + vpn = hpt_vpn(addr, vsid, ssize); + hash = hpt_hash(vpn, shift, ssize); + if (hidx & _PTEIDX_SECONDARY) + hash = ~hash; + + slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; + slot += hidx & _PTEIDX_GROUP_IX; + + slot_array[index] = slot; + vpn_array[index] = vpn; + if (index == PPC64_HUGE_HPTE_BATCH - 1) { + /* + * Now do a bluk invalidate + */ + __pSeries_lpar_hugepage_invalidate(slot_array, + vpn_array, + PPC64_HUGE_HPTE_BATCH, + psize, ssize); + index = 0; + } else + index++; + } + if (index) + __pSeries_lpar_hugepage_invalidate(slot_array, vpn_array, + index, psize, ssize); +} + +static void 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); + BUG_ON(slot == -1); + /* + * lpar doesn't use the passed actual page size + */ + pSeries_lpar_hpte_invalidate(slot, vpn, psize, 0, ssize, 0); } /* * Take a spinlock around flushes to avoid bouncing the hypervisor tlbie * lock. */ -void pSeries_lpar_flush_hash_range(unsigned long number, int local) +static void pSeries_lpar_flush_hash_range(unsigned long number, int local) { - int i; + unsigned long vpn; + unsigned long i, pix, rc; unsigned long flags = 0; struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch); - int lock_tlbie = !cpu_has_feature(CPU_FTR_LOCKLESS_TLBIE); + int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE); + unsigned long param[9]; + 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); - for (i = 0; i < number; i++) - flush_hash_page(batch->vaddr[i], batch->pte[i], - batch->psize, local); + 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); } -void hpte_init_lpar(void) +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; + ppc_md.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 (!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] & 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]; - htab_finish_init(); + return rc; } |