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Re: [Qemu-devel] [PATCH v7 08/17] intel_iommu: convert dbg macros to tra


From: Jason Wang
Subject: Re: [Qemu-devel] [PATCH v7 08/17] intel_iommu: convert dbg macros to trace for trans
Date: Wed, 8 Feb 2017 10:49:54 +0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.7.0



On 2017年02月07日 16:28, Peter Xu wrote:
Another patch to convert the DPRINTF() stuffs. This patch focuses on the
address translation path and caching.

Signed-off-by: Peter Xu <address@hidden>
---
  hw/i386/intel_iommu.c | 69 ++++++++++++++++++---------------------------------
  hw/i386/trace-events  | 10 ++++++++
  2 files changed, 34 insertions(+), 45 deletions(-)

Reviewed-by: Jason Wang <address@hidden>


diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 08e43b6..ad304f6 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -260,11 +260,9 @@ static void vtd_update_iotlb(IntelIOMMUState *s, uint16_t 
source_id,
      uint64_t *key = g_malloc(sizeof(*key));
      uint64_t gfn = vtd_get_iotlb_gfn(addr, level);
- VTD_DPRINTF(CACHE, "update iotlb sid 0x%"PRIx16 " iova 0x%"PRIx64
-                " slpte 0x%"PRIx64 " did 0x%"PRIx16, source_id, addr, slpte,
-                domain_id);
+    trace_vtd_iotlb_page_update(source_id, addr, slpte, domain_id);
      if (g_hash_table_size(s->iotlb) >= VTD_IOTLB_MAX_SIZE) {
-        VTD_DPRINTF(CACHE, "iotlb exceeds size limit, forced to reset");
+        trace_vtd_iotlb_reset("iotlb exceeds size limit");
          vtd_reset_iotlb(s);
      }
@@ -505,8 +503,7 @@ static int vtd_get_root_entry(IntelIOMMUState *s, uint8_t index, addr = s->root + index * sizeof(*re);
      if (dma_memory_read(&address_space_memory, addr, re, sizeof(*re))) {
-        VTD_DPRINTF(GENERAL, "error: fail to access root-entry at 0x%"PRIx64
-                    " + %"PRIu8, s->root, index);
+        trace_vtd_re_invalid(re->rsvd, re->val);
          re->val = 0;
          return -VTD_FR_ROOT_TABLE_INV;
      }
@@ -524,15 +521,10 @@ static int vtd_get_context_entry_from_root(VTDRootEntry 
*root, uint8_t index,
  {
      dma_addr_t addr;
- if (!vtd_root_entry_present(root)) {
-        VTD_DPRINTF(GENERAL, "error: root-entry is not present");
-        return -VTD_FR_ROOT_ENTRY_P;
-    }
+    /* we have checked that root entry is present */
      addr = (root->val & VTD_ROOT_ENTRY_CTP) + index * sizeof(*ce);
      if (dma_memory_read(&address_space_memory, addr, ce, sizeof(*ce))) {
-        VTD_DPRINTF(GENERAL, "error: fail to access context-entry at 0x%"PRIx64
-                    " + %"PRIu8,
-                    (uint64_t)(root->val & VTD_ROOT_ENTRY_CTP), index);
+        trace_vtd_re_invalid(root->rsvd, root->val);
          return -VTD_FR_CONTEXT_TABLE_INV;
      }
      ce->lo = le64_to_cpu(ce->lo);
@@ -704,12 +696,11 @@ static int vtd_dev_to_context_entry(IntelIOMMUState *s, 
uint8_t bus_num,
      }
if (!vtd_root_entry_present(&re)) {
-        VTD_DPRINTF(GENERAL, "error: root-entry #%"PRIu8 " is not present",
-                    bus_num);
+        /* Not error - it's okay we don't have root entry. */
+        trace_vtd_re_not_present(bus_num);
          return -VTD_FR_ROOT_ENTRY_P;
      } else if (re.rsvd || (re.val & VTD_ROOT_ENTRY_RSVD)) {
-        VTD_DPRINTF(GENERAL, "error: non-zero reserved field in root-entry "
-                    "hi 0x%"PRIx64 " lo 0x%"PRIx64, re.rsvd, re.val);
+        trace_vtd_re_invalid(re.rsvd, re.val);
          return -VTD_FR_ROOT_ENTRY_RSVD;
      }
@@ -719,22 +710,17 @@ static int vtd_dev_to_context_entry(IntelIOMMUState *s, uint8_t bus_num,
      }
if (!vtd_context_entry_present(ce)) {
-        VTD_DPRINTF(GENERAL,
-                    "error: context-entry #%"PRIu8 "(bus #%"PRIu8 ") "
-                    "is not present", devfn, bus_num);
+        /* Not error - it's okay we don't have context entry. */
+        trace_vtd_ce_not_present(bus_num, devfn);
          return -VTD_FR_CONTEXT_ENTRY_P;
      } else if ((ce->hi & VTD_CONTEXT_ENTRY_RSVD_HI) ||
                 (ce->lo & VTD_CONTEXT_ENTRY_RSVD_LO)) {
-        VTD_DPRINTF(GENERAL,
-                    "error: non-zero reserved field in context-entry "
-                    "hi 0x%"PRIx64 " lo 0x%"PRIx64, ce->hi, ce->lo);
+        trace_vtd_ce_invalid(ce->hi, ce->lo);
          return -VTD_FR_CONTEXT_ENTRY_RSVD;
      }
      /* Check if the programming of context-entry is valid */
      if (!vtd_is_level_supported(s, vtd_get_level_from_context_entry(ce))) {
-        VTD_DPRINTF(GENERAL, "error: unsupported Address Width value in "
-                    "context-entry hi 0x%"PRIx64 " lo 0x%"PRIx64,
-                    ce->hi, ce->lo);
+        trace_vtd_ce_invalid(ce->hi, ce->lo);
          return -VTD_FR_CONTEXT_ENTRY_INV;
      } else {
          switch (ce->lo & VTD_CONTEXT_ENTRY_TT) {
@@ -743,9 +729,7 @@ static int vtd_dev_to_context_entry(IntelIOMMUState *s, 
uint8_t bus_num,
          case VTD_CONTEXT_TT_DEV_IOTLB:
              break;
          default:
-            VTD_DPRINTF(GENERAL, "error: unsupported Translation Type in "
-                        "context-entry hi 0x%"PRIx64 " lo 0x%"PRIx64,
-                        ce->hi, ce->lo);
+            trace_vtd_ce_invalid(ce->hi, ce->lo);
              return -VTD_FR_CONTEXT_ENTRY_INV;
          }
      }
@@ -825,9 +809,8 @@ static void vtd_do_iommu_translate(VTDAddressSpace *vtd_as, 
PCIBus *bus,
      /* Try to fetch slpte form IOTLB */
      iotlb_entry = vtd_lookup_iotlb(s, source_id, addr);
      if (iotlb_entry) {
-        VTD_DPRINTF(CACHE, "hit iotlb sid 0x%"PRIx16 " iova 0x%"PRIx64
-                    " slpte 0x%"PRIx64 " did 0x%"PRIx16, source_id, addr,
-                    iotlb_entry->slpte, iotlb_entry->domain_id);
+        trace_vtd_iotlb_page_hit(source_id, addr, iotlb_entry->slpte,
+                                 iotlb_entry->domain_id);
          slpte = iotlb_entry->slpte;
          reads = iotlb_entry->read_flags;
          writes = iotlb_entry->write_flags;
@@ -836,10 +819,9 @@ static void vtd_do_iommu_translate(VTDAddressSpace 
*vtd_as, PCIBus *bus,
      }
      /* Try to fetch context-entry from cache first */
      if (cc_entry->context_cache_gen == s->context_cache_gen) {
-        VTD_DPRINTF(CACHE, "hit context-cache bus %d devfn %d "
-                    "(hi %"PRIx64 " lo %"PRIx64 " gen %"PRIu32 ")",
-                    bus_num, devfn, cc_entry->context_entry.hi,
-                    cc_entry->context_entry.lo, cc_entry->context_cache_gen);
+        trace_vtd_iotlb_cc_hit(bus_num, devfn, cc_entry->context_entry.hi,
+                               cc_entry->context_entry.lo,
+                               cc_entry->context_cache_gen);
          ce = cc_entry->context_entry;
          is_fpd_set = ce.lo & VTD_CONTEXT_ENTRY_FPD;
      } else {
@@ -848,19 +830,16 @@ static void vtd_do_iommu_translate(VTDAddressSpace 
*vtd_as, PCIBus *bus,
          if (ret_fr) {
              ret_fr = -ret_fr;
              if (is_fpd_set && vtd_is_qualified_fault(ret_fr)) {
-                VTD_DPRINTF(FLOG, "fault processing is disabled for DMA "
-                            "requests through this context-entry "
-                            "(with FPD Set)");
+                trace_vtd_fault_disabled();
              } else {
                  vtd_report_dmar_fault(s, source_id, addr, ret_fr, is_write);
              }
              return;
          }
          /* Update context-cache */
-        VTD_DPRINTF(CACHE, "update context-cache bus %d devfn %d "
-                    "(hi %"PRIx64 " lo %"PRIx64 " gen %"PRIu32 "->%"PRIu32 ")",
-                    bus_num, devfn, ce.hi, ce.lo,
-                    cc_entry->context_cache_gen, s->context_cache_gen);
+        trace_vtd_iotlb_cc_update(bus_num, devfn, ce.hi, ce.lo,
+                                  cc_entry->context_cache_gen,
+                                  s->context_cache_gen);
          cc_entry->context_entry = ce;
          cc_entry->context_cache_gen = s->context_cache_gen;
      }
@@ -870,8 +849,7 @@ static void vtd_do_iommu_translate(VTDAddressSpace *vtd_as, 
PCIBus *bus,
      if (ret_fr) {
          ret_fr = -ret_fr;
          if (is_fpd_set && vtd_is_qualified_fault(ret_fr)) {
-            VTD_DPRINTF(FLOG, "fault processing is disabled for DMA requests "
-                        "through this context-entry (with FPD Set)");
+            trace_vtd_fault_disabled();
          } else {
              vtd_report_dmar_fault(s, source_id, addr, ret_fr, is_write);
          }
@@ -1031,6 +1009,7 @@ static uint64_t 
vtd_context_cache_invalidate(IntelIOMMUState *s, uint64_t val)
static void vtd_iotlb_global_invalidate(IntelIOMMUState *s)
  {
+    trace_vtd_iotlb_reset("global invalidation recved");
      vtd_reset_iotlb(s);
  }
diff --git a/hw/i386/trace-events b/hw/i386/trace-events
index 02aeaab..88ad5e4 100644
--- a/hw/i386/trace-events
+++ b/hw/i386/trace-events
@@ -20,6 +20,16 @@ vtd_inv_desc_wait_sw(uint64_t addr, uint32_t data) "wait 
invalidate status write
  vtd_inv_desc_wait_irq(const char *msg) "%s"
  vtd_inv_desc_wait_invalid(uint64_t hi, uint64_t lo) "invalid wait desc hi 
0x%"PRIx64" lo 0x%"PRIx64
  vtd_inv_desc_wait_write_fail(uint64_t hi, uint64_t lo) "write fail for wait desc hi 
0x%"PRIx64" lo 0x%"PRIx64
+vtd_re_not_present(uint8_t bus) "Root entry bus %"PRIu8" not present"
+vtd_re_invalid(uint64_t hi, uint64_t lo) "invalid root entry hi 0x%"PRIx64" lo 
0x%"PRIx64
+vtd_ce_not_present(uint8_t bus, uint8_t devfn) "Context entry bus %"PRIu8" devfn 
%"PRIu8" not present"
+vtd_ce_invalid(uint64_t hi, uint64_t lo) "invalid context entry hi 0x%"PRIx64" lo 
0x%"PRIx64
+vtd_iotlb_page_hit(uint16_t sid, uint64_t addr, uint64_t slpte, uint16_t domain) "IOTLB page hit sid 
0x%"PRIx16" iova 0x%"PRIx64" slpte 0x%"PRIx64" domain 0x%"PRIx16
+vtd_iotlb_page_update(uint16_t sid, uint64_t addr, uint64_t slpte, uint16_t domain) "IOTLB page update sid 
0x%"PRIx16" iova 0x%"PRIx64" slpte 0x%"PRIx64" domain 0x%"PRIx16
+vtd_iotlb_cc_hit(uint8_t bus, uint8_t devfn, uint64_t high, uint64_t low, uint32_t gen) "IOTLB context hit bus 
0x%"PRIx8" devfn 0x%"PRIx8" high 0x%"PRIx64" low 0x%"PRIx64" gen %"PRIu32
+vtd_iotlb_cc_update(uint8_t bus, uint8_t devfn, uint64_t high, uint64_t low, uint32_t gen1, uint32_t gen2) "IOTLB context update bus 
0x%"PRIx8" devfn 0x%"PRIx8" high 0x%"PRIx64" low 0x%"PRIx64" gen %"PRIu32" -> gen 
%"PRIu32
+vtd_iotlb_reset(const char *reason) "IOTLB reset (reason: %s)"
+vtd_fault_disabled(void) "Fault processing disabled for context entry"
# hw/i386/amd_iommu.c
  amdvi_evntlog_fail(uint64_t addr, uint32_t head) "error: fail to write at addr 
0x%"PRIx64" +  offset 0x%"PRIx32




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