Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (34 commits)
  powerpc: Wireup new syscalls
  Move update_mmu_cache() declaration from tlbflush.h to pgtable.h
  powerpc/pseries: Remove kmalloc call in handling writes to lparcfg
  powerpc/pseries: Update arch vector to indicate support for CMO
  ibmvfc: Add support for collaborative memory overcommit
  ibmvscsi: driver enablement for CMO
  ibmveth: enable driver for CMO
  ibmveth: Automatically enable larger rx buffer pools for larger mtu
  powerpc/pseries: Verify CMO memory entitlement updates with virtual I/O
  powerpc/pseries: vio bus support for CMO
  powerpc/pseries: iommu enablement for CMO
  powerpc/pseries: Add CMO paging statistics
  powerpc/pseries: Add collaborative memory manager
  powerpc/pseries: Utilities to set firmware page state
  powerpc/pseries: Enable CMO feature during platform setup
  powerpc/pseries: Split retrieval of processor entitlement data into a helper routine
  powerpc/pseries: Add memory entitlement capabilities to /proc/ppc64/lparcfg
  powerpc/pseries: Split processor entitlement retrieval and gathering to helper routines
  powerpc/pseries: Remove extraneous error reporting for hcall failures in lparcfg
  powerpc: Fix compile error with binutils 2.15
  ...

Fixed up conflict in arch/powerpc/platforms/52xx/Kconfig manually.

1 files changed, 260 insertions, 126 deletions

diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c
index 827a5726a035..9f856a0c3e38 100644
--- a/arch/powerpc/kernel/lparcfg.c
+++ b/arch/powerpc/kernel/lparcfg.c
@@ -34,8 +34,9 @@
 #include <asm/time.h>
 #include <asm/prom.h>
 #include <asm/vdso_datapage.h>
+#include <asm/vio.h>
 
-#define MODULE_VERS "1.7"
+#define MODULE_VERS "1.8"
 #define MODULE_NAME "lparcfg"
 
 /* #define LPARCFG_DEBUG */
@@ -129,32 +130,46 @@ static int iseries_lparcfg_data(struct seq_file *m, void *v)
 /*
  * Methods used to fetch LPAR data when running on a pSeries platform.
  */
-static void log_plpar_hcall_return(unsigned long rc, char *tag)
+/**
+ * h_get_mpp
+ * H_GET_MPP hcall returns info in 7 parms
+ */
+int h_get_mpp(struct hvcall_mpp_data *mpp_data)
 {
-        switch(rc) {
-        case 0:
-                return;
-        case H_HARDWARE:
-                printk(KERN_INFO "plpar-hcall (%s) "
-                                "Hardware fault\n", tag);
-                return;
-        case H_FUNCTION:
-                printk(KERN_INFO "plpar-hcall (%s) "
-                                "Function not allowed\n", tag);
-                return;
-        case H_AUTHORITY:
-                printk(KERN_INFO "plpar-hcall (%s) "
-                                "Not authorized to this function\n", tag);
-                return;
-        case H_PARAMETER:
-                printk(KERN_INFO "plpar-hcall (%s) "
-                                "Bad parameter(s)\n",tag);
-                return;
-        default:
-                printk(KERN_INFO "plpar-hcall (%s) "
-                                "Unexpected rc(0x%lx)\n", tag, rc);
-        }
+        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);
+
+struct hvcall_ppp_data {
+        u64     entitlement;
+        u64     unallocated_entitlement;
+        u16     group_num;
+        u16     pool_num;
+        u8      capped;
+        u8      weight;
+        u8      unallocated_weight;
+        u16     active_procs_in_pool;
+        u16     active_system_procs;
+};
 
 /*
  * H_GET_PPP hcall returns info in 4 parms.
@@ -176,27 +191,30 @@ static void log_plpar_hcall_return(unsigned long rc, char *tag)
  *              XXXX - Active processors in Physical Processor Pool.
  *                  XXXX  - Processors active on platform.
  */
-static unsigned int h_get_ppp(unsigned long *entitled,
-                              unsigned long *unallocated,
-                              unsigned long *aggregation,
-                              unsigned long *resource)
+static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data)
 {
         unsigned long rc;
         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 
         rc = plpar_hcall(H_GET_PPP, retbuf);
 
-        *entitled = retbuf[0];
-        *unallocated = retbuf[1];
-        *aggregation = retbuf[2];
-        *resource = retbuf[3];
+        ppp_data->entitlement = retbuf[0];
+        ppp_data->unallocated_entitlement = retbuf[1];
+
+        ppp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff;
+        ppp_data->pool_num = retbuf[2] & 0xffff;
 
-        log_plpar_hcall_return(rc, "H_GET_PPP");
+        ppp_data->capped = (retbuf[3] >> 6 * 8) & 0x01;
+        ppp_data->weight = (retbuf[3] >> 5 * 8) & 0xff;
+        ppp_data->unallocated_weight = (retbuf[3] >> 4 * 8) & 0xff;
+        ppp_data->active_procs_in_pool = (retbuf[3] >> 2 * 8) & 0xffff;
+        ppp_data->active_system_procs = retbuf[3] & 0xffff;
 
         return rc;
 }
 
-static void h_pic(unsigned long *pool_idle_time, unsigned long *num_procs)
+static unsigned h_pic(unsigned long *pool_idle_time,
+                      unsigned long *num_procs)
 {
         unsigned long rc;
         unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
@@ -206,8 +224,87 @@ static void h_pic(unsigned long *pool_idle_time, unsigned long *num_procs)
         *pool_idle_time = retbuf[0];
         *num_procs = retbuf[1];
 
-        if (rc != H_AUTHORITY)
-                log_plpar_hcall_return(rc, "H_PIC");
+        return rc;
+}
+
+/*
+ * parse_ppp_data
+ * Parse out the data returned from h_get_ppp and h_pic
+ */
+static void parse_ppp_data(struct seq_file *m)
+{
+        struct hvcall_ppp_data ppp_data;
+        int rc;
+
+        rc = h_get_ppp(&ppp_data);
+        if (rc)
+                return;
+
+        seq_printf(m, "partition_entitled_capacity=%ld\n",
+                   ppp_data.entitlement);
+        seq_printf(m, "group=%d\n", ppp_data.group_num);
+        seq_printf(m, "system_active_processors=%d\n",
+                   ppp_data.active_system_procs);
+
+        /* pool related entries are apropriate for shared configs */
+        if (lppaca[0].shared_proc) {
+                unsigned long pool_idle_time, pool_procs;
+
+                seq_printf(m, "pool=%d\n", ppp_data.pool_num);
+
+                /* report pool_capacity in percentage */
+                seq_printf(m, "pool_capacity=%d\n",
+                           ppp_data.active_procs_in_pool * 100);
+
+                h_pic(&pool_idle_time, &pool_procs);
+                seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time);
+                seq_printf(m, "pool_num_procs=%ld\n", pool_procs);
+        }
+
+        seq_printf(m, "unallocated_capacity_weight=%d\n",
+                   ppp_data.unallocated_weight);
+        seq_printf(m, "capacity_weight=%d\n", ppp_data.weight);
+        seq_printf(m, "capped=%d\n", ppp_data.capped);
+        seq_printf(m, "unallocated_capacity=%ld\n",
+                   ppp_data.unallocated_entitlement);
+}
+
+/**
+ * parse_mpp_data
+ * Parse out data returned from h_get_mpp
+ */
+static void parse_mpp_data(struct seq_file *m)
+{
+        struct hvcall_mpp_data mpp_data;
+        int rc;
+
+        rc = h_get_mpp(&mpp_data);
+        if (rc)
+                return;
+
+        seq_printf(m, "entitled_memory=%ld\n", mpp_data.entitled_mem);
+
+        if (mpp_data.mapped_mem != -1)
+                seq_printf(m, "mapped_entitled_memory=%ld\n",
+                           mpp_data.mapped_mem);
+
+        seq_printf(m, "entitled_memory_group_number=%d\n", mpp_data.group_num);
+        seq_printf(m, "entitled_memory_pool_number=%d\n", mpp_data.pool_num);
+
+        seq_printf(m, "entitled_memory_weight=%d\n", mpp_data.mem_weight);
+        seq_printf(m, "unallocated_entitled_memory_weight=%d\n",
+                   mpp_data.unallocated_mem_weight);
+        seq_printf(m, "unallocated_io_mapping_entitlement=%ld\n",
+                   mpp_data.unallocated_entitlement);
+
+        if (mpp_data.pool_size != -1)
+                seq_printf(m, "entitled_memory_pool_size=%ld bytes\n",
+                           mpp_data.pool_size);
+
+        seq_printf(m, "entitled_memory_loan_request=%ld\n",
+                   mpp_data.loan_request);
+
+        seq_printf(m, "backing_memory=%ld bytes\n", mpp_data.backing_mem);
 }
 
 #define SPLPAR_CHARACTERISTICS_TOKEN 20
@@ -313,6 +410,25 @@ static int lparcfg_count_active_processors(void)
         return count;
 }
 
+static void pseries_cmo_data(struct seq_file *m)
+{
+        int cpu;
+        unsigned long cmo_faults = 0;
+        unsigned long cmo_fault_time = 0;
+
+        if (!firmware_has_feature(FW_FEATURE_CMO))
+                return;
+
+        for_each_possible_cpu(cpu) {
+                cmo_faults += lppaca[cpu].cmo_faults;
+                cmo_fault_time += lppaca[cpu].cmo_fault_time;
+        }
+
+        seq_printf(m, "cmo_faults=%lu\n", cmo_faults);
+        seq_printf(m, "cmo_fault_time_usec=%lu\n",
+                   cmo_fault_time / tb_ticks_per_usec);
+}
+
 static int pseries_lparcfg_data(struct seq_file *m, void *v)
 {
         int partition_potential_processors;
@@ -334,60 +450,13 @@ static int pseries_lparcfg_data(struct seq_file *m, void *v)
         partition_active_processors = lparcfg_count_active_processors();
 
         if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
-                unsigned long h_entitled, h_unallocated;
-                unsigned long h_aggregation, h_resource;
-                unsigned long pool_idle_time, pool_procs;
-                unsigned long purr;
-
-                h_get_ppp(&h_entitled, &h_unallocated, &h_aggregation,
-                          &h_resource);
-
-                seq_printf(m, "R4=0x%lx\n", h_entitled);
-                seq_printf(m, "R5=0x%lx\n", h_unallocated);
-                seq_printf(m, "R6=0x%lx\n", h_aggregation);
-                seq_printf(m, "R7=0x%lx\n", h_resource);
-
-                purr = get_purr();
-
                 /* this call handles the ibm,get-system-parameter contents */
                 parse_system_parameter_string(m);
+                parse_ppp_data(m);
+                parse_mpp_data(m);
+                pseries_cmo_data(m);
 
-                seq_printf(m, "partition_entitled_capacity=%ld\n", h_entitled);
-
-                seq_printf(m, "group=%ld\n", (h_aggregation >> 2 * 8) & 0xffff);
-
-                seq_printf(m, "system_active_processors=%ld\n",
-                           (h_resource >> 0 * 8) & 0xffff);
-
-                /* pool related entries are apropriate for shared configs */
-                if (lppaca[0].shared_proc) {
-
-                        h_pic(&pool_idle_time, &pool_procs);
-
-                        seq_printf(m, "pool=%ld\n",
-                                   (h_aggregation >> 0 * 8) & 0xffff);
-
-                        /* report pool_capacity in percentage */
-                        seq_printf(m, "pool_capacity=%ld\n",
-                                   ((h_resource >> 2 * 8) & 0xffff) * 100);
-
-                        seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time);
-
-                        seq_printf(m, "pool_num_procs=%ld\n", pool_procs);
-                }
-
-                seq_printf(m, "unallocated_capacity_weight=%ld\n",
-                           (h_resource >> 4 * 8) & 0xFF);
-
-                seq_printf(m, "capacity_weight=%ld\n",
-                           (h_resource >> 5 * 8) & 0xFF);
-
-                seq_printf(m, "capped=%ld\n", (h_resource >> 6 * 8) & 0x01);
-
-                seq_printf(m, "unallocated_capacity=%ld\n", h_unallocated);
-
-                seq_printf(m, "purr=%ld\n", purr);
-
+                seq_printf(m, "purr=%ld\n", get_purr());
         } else {                /* non SPLPAR case */
 
                 seq_printf(m, "system_active_processors=%d\n",
@@ -414,6 +483,83 @@ static int pseries_lparcfg_data(struct seq_file *m, void *v)
         return 0;
 }
 
+static ssize_t update_ppp(u64 *entitlement, u8 *weight)
+{
+        struct hvcall_ppp_data ppp_data;
+        u8 new_weight;
+        u64 new_entitled;
+        ssize_t retval;
+
+        /* Get our current parameters */
+        retval = h_get_ppp(&ppp_data);
+        if (retval)
+                return retval;
+
+        if (entitlement) {
+                new_weight = ppp_data.weight;
+                new_entitled = *entitlement;
+        } else if (weight) {
+                new_weight = *weight;
+                new_entitled = ppp_data.entitlement;
+        } else
+                return -EINVAL;
+
+        pr_debug("%s: current_entitled = %lu, current_weight = %u\n",
+                 __FUNCTION__, ppp_data.entitlement, ppp_data.weight);
+
+        pr_debug("%s: new_entitled = %lu, new_weight = %u\n",
+                 __FUNCTION__, new_entitled, new_weight);
+
+        retval = plpar_hcall_norets(H_SET_PPP, new_entitled, new_weight);
+        return retval;
+}
+
+/**
+ * update_mpp
+ *
+ * Update the memory entitlement and weight for the partition.  Caller must
+ * specify either a new entitlement or weight, not both, to be updated
+ * since the h_set_mpp call takes both entitlement and weight as parameters.
+ */
+static ssize_t update_mpp(u64 *entitlement, u8 *weight)
+{
+        struct hvcall_mpp_data mpp_data;
+        u64 new_entitled;
+        u8 new_weight;
+        ssize_t rc;
+
+        if (entitlement) {
+                /* Check with vio to ensure the new memory entitlement
+                 * can be handled.
+                 */
+                rc = vio_cmo_entitlement_update(*entitlement);
+                if (rc)
+                        return rc;
+        }
+
+        rc = h_get_mpp(&mpp_data);
+        if (rc)
+                return rc;
+
+        if (entitlement) {
+                new_weight = mpp_data.mem_weight;
+                new_entitled = *entitlement;
+        } else if (weight) {
+                new_weight = *weight;
+                new_entitled = mpp_data.entitled_mem;
+        } else
+                return -EINVAL;
+
+        pr_debug("%s: current_entitled = %lu, current_weight = %u\n",
+                 __FUNCTION__, mpp_data.entitled_mem, mpp_data.mem_weight);
+
+        pr_debug("%s: new_entitled = %lu, new_weight = %u\n",
+                 __FUNCTION__, new_entitled, new_weight);
+
+        rc = plpar_hcall_norets(H_SET_MPP, new_entitled, new_weight);
+        return rc;
+}
+
 /*
  * Interface for changing system parameters (variable capacity weight
  * and entitled capacity).  Format of input is "param_name=value";
@@ -427,35 +573,27 @@ static int pseries_lparcfg_data(struct seq_file *m, void *v)
 static ssize_t lparcfg_write(struct file *file, const char __user * buf,
                              size_t count, loff_t * off)
 {
-        char *kbuf;
+        int kbuf_sz = 64;
+        char kbuf[kbuf_sz];
         char *tmp;
         u64 new_entitled, *new_entitled_ptr = &new_entitled;
         u8 new_weight, *new_weight_ptr = &new_weight;
-
-        unsigned long current_entitled; /* parameters for h_get_ppp */
-        unsigned long dummy;
-        unsigned long resource;
-        u8 current_weight;
-
-        ssize_t retval = -ENOMEM;
+        ssize_t retval;
 
         if (!firmware_has_feature(FW_FEATURE_SPLPAR) ||
                         firmware_has_feature(FW_FEATURE_ISERIES))
                 return -EINVAL;
 
-        kbuf = kmalloc(count, GFP_KERNEL);
-        if (!kbuf)
-                goto out;
+        if (count > kbuf_sz)
+                return -EINVAL;
 
-        retval = -EFAULT;
         if (copy_from_user(kbuf, buf, count))
-                goto out;
+                return -EFAULT;
 
-        retval = -EINVAL;
         kbuf[count - 1] = '\0';
         tmp = strchr(kbuf, '=');
         if (!tmp)
-                goto out;
+                return -EINVAL;
 
         *tmp++ = '\0';
 
@@ -463,34 +601,32 @@ static ssize_t lparcfg_write(struct file *file, const char __user * buf,
                 char *endp;
                 *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
                 if (endp == tmp)
-                        goto out;
-                new_weight_ptr = &current_weight;
+                        return -EINVAL;
+
+                retval = update_ppp(new_entitled_ptr, NULL);
         } else if (!strcmp(kbuf, "capacity_weight")) {
                 char *endp;
                 *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
                 if (endp == tmp)
-                        goto out;
-                new_entitled_ptr = &current_entitled;
-        } else
-                goto out;
-
-        /* Get our current parameters */
-        retval = h_get_ppp(&current_entitled, &dummy, &dummy, &resource);
-        if (retval) {
-                retval = -EIO;
-                goto out;
-        }
-
-        current_weight = (resource >> 5 * 8) & 0xFF;
+                        return -EINVAL;
 
-        pr_debug("%s: current_entitled = %lu, current_weight = %u\n",
-                 __func__, current_entitled, current_weight);
+                retval = update_ppp(NULL, new_weight_ptr);
+        } else if (!strcmp(kbuf, "entitled_memory")) {
+                char *endp;
+                *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
+                if (endp == tmp)
+                        return -EINVAL;
 
-        pr_debug("%s: new_entitled = %lu, new_weight = %u\n",
-                 __func__, *new_entitled_ptr, *new_weight_ptr);
+                retval = update_mpp(new_entitled_ptr, NULL);
+        } else if (!strcmp(kbuf, "entitled_memory_weight")) {
+                char *endp;
+                *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
+                if (endp == tmp)
+                        return -EINVAL;
 
-        retval = plpar_hcall_norets(H_SET_PPP, *new_entitled_ptr,
-                                    *new_weight_ptr);
+                retval = update_mpp(NULL, new_weight_ptr);
+        } else
+                return -EINVAL;
 
         if (retval == H_SUCCESS || retval == H_CONSTRAINED) {
                 retval = count;
@@ -506,8 +642,6 @@ static ssize_t lparcfg_write(struct file *file, const char __user * buf,
                 retval = -EIO;
         }
 
-out:
-        kfree(kbuf);
         return retval;
 }