Changeset 62302 in vbox for trunk/src/VBox/VMM/include

Timestamp:

Jul 18, 2016 1:58:10 PM (9 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

108829

Message:

IEM,PGM: Got code TLB working in ring-3, execution is 3-4 times faster when active (still disabled of course).

File:

• trunk/src/VBox/VMM/include/IEMInternal.h (modified) (6 diffs)

trunk/src/VBox/VMM/include/IEMInternal.h

@@ -64 +64 @@
 #endif
 
+
+//#define IEM_WITH_CODE_TLB// - work in progress
 
 
@@ -310 +312 @@
     /** Pointer to the ring-3 mapping (possibly also valid in ring-0). */
 #ifdef VBOX_WITH_2X_4GB_ADDR_SPACE
-    R3PTRTYPE(uint8_t *)    pMappingR3;
+    R3PTRTYPE(uint8_t *)    pbMappingR3;
 #else
-    R3R0PTRTYPE(uint8_t *)  pMappingR3;
+    R3R0PTRTYPE(uint8_t *)  pbMappingR3;
 #endif
 #if HC_ARCH_BITS == 32
@@ -371 +373 @@
     /** TLB misses. */
     uint32_t            cTlbMisses;
+    /** Slow read path.  */
+    uint32_t            cTlbSlowReadPath;
+#if 0
     /** TLB misses because of tag mismatch. */
     uint32_t            cTlbMissesTag;
@@ -383 +388 @@
     /** TLB misses because no r3(/r0) mapping. */
     uint32_t            cTlbMissesMapping;
+#endif
     /** Alignment padding. */
-    uint32_t            au32Padding[3];
+    uint32_t            au32Padding[3+5];
 } IEMTLB;
 AssertCompileSizeAlignment(IEMTLB, 64);
@@ -448 +454 @@
      * This takes the CS segment limit into account. */
     uint16_t                cbInstrBufTotal;                                                                /* 0x24 */
-    /** Offset into pbInstrBuf of the first byte of the current instruction. */
-    uint16_t                offCurInstrStart;                                                               /* 0x26 */
+    /** Offset into pbInstrBuf of the first byte of the current instruction.
+     * Can be negative to efficiently handle cross page instructions. */
+    int16_t                 offCurInstrStart;                                                               /* 0x26 */
 
     /** The prefix mask (IEM_OP_PRF_XXX). */
@@ -722 +729 @@
 /** @def Gets the instruction length. */
 #ifdef IEM_WITH_CODE_TLB
-# define IEM_GET_INSTR_LEN(a_pVCpu)     ((a_pVCpu)->iem.s.offInstrNextByte - (uint32_t)(a_pVCpu)->iem.s.offCurInstrStart)
+# define IEM_GET_INSTR_LEN(a_pVCpu)     ((a_pVCpu)->iem.s.offInstrNextByte - (uint32_t)(int32_t)(a_pVCpu)->iem.s.offCurInstrStart)
 #else
 # define IEM_GET_INSTR_LEN(a_pVCpu)     ((a_pVCpu)->iem.s.offOpcode)