[Qemu-devel] [PATCH RFC v4 08/20] intel_iommu: fix trace for addr translation

[Peter Xu <peterx@redhat.com>]

Another patch to convert the DPRINTF() stuffs. This patch focuses on the
address translation path and caching.

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 hw/i386/intel_iommu.c | 84 ++++++++++++++++++++-------------------------------
 hw/i386/trace-events  |  7 +++++
 2 files changed, 39 insertions(+), 52 deletions(-)

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 343a2ad..2c13b7b 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_err("Fail to access root-entry");
         re->val = 0;
         return -VTD_FR_ROOT_TABLE_INV;
     }
@@ -525,14 +522,12 @@ 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");
+        trace_vtd_err("Root-entry is not present");
         return -VTD_FR_ROOT_ENTRY_P;
     }
     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_err("Fail to access context-entry");
         return -VTD_FR_CONTEXT_TABLE_INV;
     }
     ce->lo = le64_to_cpu(ce->lo);
@@ -644,7 +639,7 @@ static int vtd_gpa_to_slpte(VTDContextEntry *ce, uint64_t iova, bool is_write,
      * in CAP_REG and AW in context-entry.
      */
     if (iova & ~((1ULL << MIN(ce_agaw, VTD_MGAW)) - 1)) {
-        VTD_DPRINTF(GENERAL, "error: iova 0x%"PRIx64 " exceeds limits", iova);
+        trace_vtd_err("IOVA exceeds limits");
         return -VTD_FR_ADDR_BEYOND_MGAW;
     }
 
@@ -656,9 +651,7 @@ static int vtd_gpa_to_slpte(VTDContextEntry *ce, uint64_t iova, bool is_write,
         slpte = vtd_get_slpte(addr, offset);
 
         if (slpte == (uint64_t)-1) {
-            VTD_DPRINTF(GENERAL, "error: fail to access second-level paging "
-                        "entry at level %"PRIu32 " for iova 0x%"PRIx64,
-                        level, iova);
+            trace_vtd_err("Fail to access second-level paging entry");
             if (level == vtd_get_level_from_context_entry(ce)) {
                 /* Invalid programming of context-entry */
                 return -VTD_FR_CONTEXT_ENTRY_INV;
@@ -669,15 +662,11 @@ static int vtd_gpa_to_slpte(VTDContextEntry *ce, uint64_t iova, bool is_write,
         *reads = (*reads) && (slpte & VTD_SL_R);
         *writes = (*writes) && (slpte & VTD_SL_W);
         if (!(slpte & access_right_check)) {
-            VTD_DPRINTF(GENERAL, "error: lack of %s permission for "
-                        "iova 0x%"PRIx64 " slpte 0x%"PRIx64,
-                        (is_write ? "write" : "read"), iova, slpte);
+            trace_vtd_err("Lack of permission for page");
             return is_write ? -VTD_FR_WRITE : -VTD_FR_READ;
         }
         if (vtd_slpte_nonzero_rsvd(slpte, level)) {
-            VTD_DPRINTF(GENERAL, "error: non-zero reserved field in second "
-                        "level paging entry level %"PRIu32 " slpte 0x%"PRIx64,
-                        level, slpte);
+            trace_vtd_err_nonzero_reserved("second level paging entry");
             return -VTD_FR_PAGING_ENTRY_RSVD;
         }
 
@@ -704,12 +693,11 @@ 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_err_nonzero_reserved("Root entry");
         return -VTD_FR_ROOT_ENTRY_RSVD;
     }
 
@@ -719,22 +707,17 @@ 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_err_nonzero_reserved("Context entry");
         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_err("Unsupported Address Width value in context-entry");
         return -VTD_FR_CONTEXT_ENTRY_INV;
     } else {
         switch (ce->lo & VTD_CONTEXT_ENTRY_TT) {
@@ -743,9 +726,7 @@ 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_err("Unsupported Translation Type in context-entry");
             return -VTD_FR_CONTEXT_ENTRY_INV;
         }
     }
@@ -825,9 +806,8 @@ 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 +816,9 @@ 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 +827,18 @@ 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_err("Fault processing is disabled for DMA "
+                              "requests through this context-entry "
+                              "(with FPD Set)");
             } 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 +848,9 @@ 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_err("Fault processing is disabled for DMA "
+                          "requests through this context-entry "
+                          "(with FPD Set)");
         } else {
             vtd_report_dmar_fault(s, source_id, addr, ret_fr, is_write);
         }
@@ -1031,6 +1010,7 @@ 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 eea3e84..a273980 100644
--- a/hw/i386/trace-events
+++ b/hw/i386/trace-events
@@ -24,6 +24,13 @@ 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_err_nonzero_reserved(const char *msg) "Non-zero reserved field in %s"
 vtd_err(const char *msg) "%s"
+vtd_re_not_present(uint8_t bus) "Root entry bus %"PRIu8" not present"
+vtd_ce_not_present(uint8_t bus, uint8_t devfn) "Context entry bus %"PRIu8" devfn %"PRIu8" not present"
+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)"
 
 # 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
-- 
2.7.4