#include <linux/device.h>
#include <linux/io.h>
#include <linux/uaccess.h>
+#include <linux/security.h>
#include <asm/pgtable.h>
#include "gru.h"
#include "grutables.h"
return 1;
}
+static int gru_vtop(struct gru_thread_state *gts, unsigned long vaddr,
+ int write, int atomic, unsigned long *gpa, int *pageshift)
+{
+ struct mm_struct *mm = gts->ts_mm;
+ struct vm_area_struct *vma;
+ unsigned long paddr;
+ int ret, ps;
+
+ vma = find_vma(mm, vaddr);
+ if (!vma)
+ goto inval;
+
+ /*
+ * Atomic lookup is faster & usually works even if called in non-atomic
+ * context.
+ */
+ rmb(); /* Must/check ms_range_active before loading PTEs */
+ ret = atomic_pte_lookup(vma, vaddr, write, &paddr, &ps);
+ if (ret) {
+ if (atomic)
+ goto upm;
+ if (non_atomic_pte_lookup(vma, vaddr, write, &paddr, &ps))
+ goto inval;
+ }
+ if (is_gru_paddr(paddr))
+ goto inval;
+ paddr = paddr & ~((1UL << ps) - 1);
+ *gpa = uv_soc_phys_ram_to_gpa(paddr);
+ *pageshift = ps;
+ return 0;
+
+inval:
+ return -1;
+upm:
+ return -2;
+}
+
+
/*
* Drop a TLB entry into the GRU. The fault is described by info in an TFH.
* Input:
struct gru_tlb_fault_handle *tfh,
unsigned long __user *cb)
{
- struct mm_struct *mm = gts->ts_mm;
- struct vm_area_struct *vma;
- int pageshift, asid, write, ret;
- unsigned long paddr, gpa, vaddr;
+ int pageshift = 0, asid, write, ret, atomic = !cb;
+ unsigned long gpa = 0, vaddr = 0;
/*
* NOTE: The GRU contains magic hardware that eliminates races between
if (atomic_read(>s->ts_gms->ms_range_active))
goto failactive;
- vma = find_vma(mm, vaddr);
- if (!vma)
+ ret = gru_vtop(gts, vaddr, write, atomic, &gpa, &pageshift);
+ if (ret == -1)
goto failinval;
+ if (ret == -2)
+ goto failupm;
- /*
- * Atomic lookup is faster & usually works even if called in non-atomic
- * context.
- */
- rmb(); /* Must/check ms_range_active before loading PTEs */
- ret = atomic_pte_lookup(vma, vaddr, write, &paddr, &pageshift);
- if (ret) {
- if (!cb)
+ if (!(gts->ts_sizeavail & GRU_SIZEAVAIL(pageshift))) {
+ gts->ts_sizeavail |= GRU_SIZEAVAIL(pageshift);
+ if (atomic || !gru_update_cch(gts, 0)) {
+ gts->ts_force_cch_reload = 1;
goto failupm;
- if (non_atomic_pte_lookup(vma, vaddr, write, &paddr,
- &pageshift))
- goto failinval;
+ }
}
- if (is_gru_paddr(paddr))
- goto failinval;
-
- paddr = paddr & ~((1UL << pageshift) - 1);
- gpa = uv_soc_phys_ram_to_gpa(paddr);
gru_cb_set_istatus_active(cb);
tfh_write_restart(tfh, gpa, GAA_RAM, vaddr, asid, write,
GRU_PAGESIZE(pageshift));
failfmm:
/* FMM state on UPM call */
+ gru_flush_cache(tfh);
STAT(tlb_dropin_fail_fmm);
gru_dbg(grudev, "FAILED fmm tfh: 0x%p, state %d\n", tfh, tfh->state);
return 0;
up_read(>s->ts_mm->mmap_sem);
} else {
tfh_user_polling_mode(tfh);
+ STAT(intr_mm_lock_failed);
}
}
return IRQ_HANDLED;
if (!gts)
return -EINVAL;
- if (ucbnum >= gts->ts_cbr_au_count * GRU_CBR_AU_SIZE) {
- ret = -EINVAL;
+ if (ucbnum >= gts->ts_cbr_au_count * GRU_CBR_AU_SIZE)
goto exit;
- }
/*
* If force_unload is set, the UPM TLB fault is phony. The task
* unload the context. The task will page fault and assign a new
* context.
*/
+ if (gts->ts_tgid_owner == current->tgid && gts->ts_blade >= 0 &&
+ gts->ts_blade != uv_numa_blade_id()) {
+ STAT(call_os_offnode_reference);
+ gts->ts_force_unload = 1;
+ }
+
+ /*
+ * CCH may contain stale data if ts_force_cch_reload is set.
+ */
+ if (gts->ts_gru && gts->ts_force_cch_reload) {
+ gru_update_cch(gts, 0);
+ gts->ts_force_cch_reload = 0;
+ }
+
ret = -EAGAIN;
cbrnum = thread_cbr_number(gts, ucbnum);
if (gts->ts_force_unload) {
if (!gts)
return -EINVAL;
- if (gts->ts_gru) {
- ucbnum = get_cb_number((void *)excdet.cb);
+ ucbnum = get_cb_number((void *)excdet.cb);
+ if (ucbnum >= gts->ts_cbr_au_count * GRU_CBR_AU_SIZE) {
+ ret = -EINVAL;
+ } else if (gts->ts_gru) {
cbrnum = thread_cbr_number(gts, ucbnum);
cbe = get_cbe_by_index(gts->ts_gru, cbrnum);
- prefetchw(cbe); /* Harmless on hardware, required for emulator */
+ prefetchw(cbe);/* Harmless on hardware, required for emulator */
excdet.opc = cbe->opccpy;
excdet.exopc = cbe->exopccpy;
excdet.ecause = cbe->ecause;
/*
* User request to unload a context. Content is saved for possible reload.
*/
+static int gru_unload_all_contexts(void)
+{
+ struct gru_thread_state *gts;
+ struct gru_state *gru;
+ int gid, ctxnum;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ foreach_gid(gid) {
+ gru = GID_TO_GRU(gid);
+ spin_lock(&gru->gs_lock);
+ for (ctxnum = 0; ctxnum < GRU_NUM_CCH; ctxnum++) {
+ gts = gru->gs_gts[ctxnum];
+ if (gts && mutex_trylock(>s->ts_ctxlock)) {
+ spin_unlock(&gru->gs_lock);
+ gru_unload_context(gts, 1);
+ gru_unlock_gts(gts);
+ spin_lock(&gru->gs_lock);
+ }
+ }
+ spin_unlock(&gru->gs_lock);
+ }
+ return 0;
+}
+
int gru_user_unload_context(unsigned long arg)
{
struct gru_thread_state *gts;
gru_dbg(grudev, "gseg 0x%lx\n", req.gseg);
+ if (!req.gseg)
+ return gru_unload_all_contexts();
+
gts = gru_find_lock_gts(req.gseg);
if (!gts)
return -EINVAL;
if (!gts)
return -EINVAL;
- gru_flush_tlb_range(gts->ts_gms, req.vaddr, req.vaddr + req.len);
+ gru_flush_tlb_range(gts->ts_gms, req.vaddr, req.len);
gru_unlock_gts(gts);
return 0;
projects / linux-2.6-omap-h63xx.git / blobdiff