[Xen-changelog] [xen master] VMX: replace plain numbers

[patchbot@xxxxxxx]

commit 1a661fe8f0a1a2df99d5328d06d1eef42ef117ac
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Fri Jan 23 15:05:08 2015 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Jan 23 15:05:08 2015 +0100

    VMX: replace plain numbers
    
    ... making the code better document itself. No functional change
    intended.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Acked-by: Kevin Tian <kevin.tian@xxxxxxxxx>
---
 xen/arch/x86/hvm/vmx/vmx.c        |   37 +++++++++++++++++++++++++------------
 xen/arch/x86/hvm/vmx/vvmx.c       |   18 ++++++++++--------
 xen/include/asm-x86/hvm/vmx/vmx.h |    4 +++-
 3 files changed, 38 insertions(+), 21 deletions(-)

diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index a5a59c4..8612601 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -1406,7 +1406,9 @@ static void __vmx_inject_exception(int trap, int type, 
int error_code)
      *   VM entry]", PRM Vol. 3, 22.6.1 (Interruptibility State).
      */
 
-    intr_fields = (INTR_INFO_VALID_MASK | (type<<8) | trap);
+    intr_fields = INTR_INFO_VALID_MASK |
+                  MASK_INSR(type, INTR_INFO_INTR_TYPE_MASK) |
+                  MASK_INSR(trap, INTR_INFO_VECTOR_MASK);
     if ( error_code != HVM_DELIVER_NO_ERROR_CODE ) {
         __vmwrite(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code);
         intr_fields |= INTR_INFO_DELIVER_CODE_MASK;
@@ -1430,7 +1432,9 @@ void vmx_inject_extint(int trap, uint8_t source)
                                      PIN_BASED_VM_EXEC_CONTROL);
         if ( pin_based_cntrl & PIN_BASED_EXT_INTR_MASK ) {
             nvmx_enqueue_n2_exceptions (v, 
-               INTR_INFO_VALID_MASK | (X86_EVENTTYPE_EXT_INTR<<8) | trap,
+               INTR_INFO_VALID_MASK |
+               MASK_INSR(X86_EVENTTYPE_EXT_INTR, INTR_INFO_INTR_TYPE_MASK) |
+               MASK_INSR(trap, INTR_INFO_VECTOR_MASK),
                HVM_DELIVER_NO_ERROR_CODE, source);
             return;
         }
@@ -1449,7 +1453,9 @@ void vmx_inject_nmi(void)
                                      PIN_BASED_VM_EXEC_CONTROL);
         if ( pin_based_cntrl & PIN_BASED_NMI_EXITING ) {
             nvmx_enqueue_n2_exceptions (v, 
-               INTR_INFO_VALID_MASK | (X86_EVENTTYPE_NMI<<8) | TRAP_nmi,
+               INTR_INFO_VALID_MASK |
+               MASK_INSR(X86_EVENTTYPE_NMI, INTR_INFO_INTR_TYPE_MASK) |
+               MASK_INSR(TRAP_nmi, INTR_INFO_VECTOR_MASK),
                HVM_DELIVER_NO_ERROR_CODE, hvm_intsrc_nmi);
             return;
         }
@@ -1487,7 +1493,7 @@ static void vmx_inject_trap(struct hvm_trap *trap)
         if ( guest_cpu_user_regs()->eflags & X86_EFLAGS_TF )
         {
             __restore_debug_registers(curr);
-            write_debugreg(6, read_debugreg(6) | 0x4000);
+            write_debugreg(6, read_debugreg(6) | DR_STEP);
         }
         if ( cpu_has_monitor_trap_flag )
             break;
@@ -1502,7 +1508,8 @@ static void vmx_inject_trap(struct hvm_trap *trap)
     }
 
     if ( unlikely(intr_info & INTR_INFO_VALID_MASK) &&
-         (((intr_info >> 8) & 7) == X86_EVENTTYPE_HW_EXCEPTION) )
+         (MASK_EXTR(intr_info, INTR_INFO_INTR_TYPE_MASK) ==
+          X86_EVENTTYPE_HW_EXCEPTION) )
     {
         _trap.vector = hvm_combine_hw_exceptions(
             (uint8_t)intr_info, _trap.vector);
@@ -1517,7 +1524,9 @@ static void vmx_inject_trap(struct hvm_trap *trap)
          nvmx_intercepts_exception(curr, _trap.vector, _trap.error_code) )
     {
         nvmx_enqueue_n2_exceptions (curr, 
-            INTR_INFO_VALID_MASK | (_trap.type<<8) | _trap.vector,
+            INTR_INFO_VALID_MASK |
+            MASK_INSR(_trap.type, INTR_INFO_INTR_TYPE_MASK) |
+            MASK_INSR(_trap.vector, INTR_INFO_VECTOR_MASK),
             _trap.error_code, hvm_intsrc_none);
         return;
     }
@@ -1976,8 +1985,11 @@ static int vmx_cr_access(unsigned long 
exit_qualification)
     }
     case VMX_CONTROL_REG_ACCESS_TYPE_LMSW: {
         unsigned long value = curr->arch.hvm_vcpu.guest_cr[0];
-        /* LMSW can: (1) set bits 0-3; (2) clear bits 1-3. */
-        value = (value & ~0xe) | ((exit_qualification >> 16) & 0xf);
+
+        /* LMSW can (1) set PE; (2) set or clear MP, EM, and TS. */
+        value = (value & ~(X86_CR0_MP|X86_CR0_EM|X86_CR0_TS)) |
+                (VMX_CONTROL_REG_ACCESS_DATA(exit_qualification) &
+                 (X86_CR0_PE|X86_CR0_MP|X86_CR0_EM|X86_CR0_TS));
         HVMTRACE_LONG_1D(LMSW, value);
         return hvm_set_cr0(value);
     }
@@ -2803,7 +2815,7 @@ void vmx_vmexit_handler(struct cpu_user_regs *regs)
              */
             __vmread(EXIT_QUALIFICATION, &exit_qualification);
             HVMTRACE_1D(TRAP_DEBUG, exit_qualification);
-            write_debugreg(6, exit_qualification | 0xffff0ff0);
+            write_debugreg(6, exit_qualification | DR_STATUS_RESERVED_ONE);
             if ( !v->domain->debugger_attached || cpu_has_monitor_trap_flag )
                 goto exit_and_crash;
             domain_pause_for_debugger();
@@ -2872,8 +2884,8 @@ void vmx_vmexit_handler(struct cpu_user_regs *regs)
             hvm_inject_page_fault(regs->error_code, exit_qualification);
             break;
         case TRAP_nmi:
-            if ( (intr_info & INTR_INFO_INTR_TYPE_MASK) !=
-                 (X86_EVENTTYPE_NMI << 8) )
+            if ( MASK_EXTR(intr_info, INTR_INFO_INTR_TYPE_MASK) !=
+                 X86_EVENTTYPE_NMI )
                 goto exit_and_crash;
             HVMTRACE_0D(NMI);
             /* Already handled above. */
@@ -2924,7 +2936,8 @@ void vmx_vmexit_handler(struct cpu_user_regs *regs)
          *  - TSW is a vectored event due to a SW exception or SW interrupt.
          */
         inst_len = ((source != 3) ||        /* CALL, IRET, or JMP? */
-                    (idtv_info & (1u<<10))) /* IntrType > 3? */
+                    (MASK_EXTR(idtv_info, INTR_INFO_INTR_TYPE_MASK)
+                     > 3)) /* IntrType > 3? */
             ? get_instruction_length() /* Safe: SDM 3B 23.2.4 */ : 0;
         if ( (source == 3) && (idtv_info & INTR_INFO_DELIVER_CODE_MASK) )
             __vmread(IDT_VECTORING_ERROR_CODE, &ecode);
diff --git a/xen/arch/x86/hvm/vmx/vvmx.c b/xen/arch/x86/hvm/vmx/vvmx.c
index 91e6ae4..ac6e3b3 100644
--- a/xen/arch/x86/hvm/vmx/vvmx.c
+++ b/xen/arch/x86/hvm/vmx/vvmx.c
@@ -1272,7 +1272,7 @@ static void sync_exception_state(struct vcpu *v)
     if ( !(nvmx->intr.intr_info & INTR_INFO_VALID_MASK) )
         return;
 
-    switch ( (nvmx->intr.intr_info & INTR_INFO_INTR_TYPE_MASK) >> 8 )
+    switch ( MASK_EXTR(nvmx->intr.intr_info, INTR_INFO_INTR_TYPE_MASK) )
     {
     case X86_EVENTTYPE_EXT_INTR:
         /* rename exit_reason to EXTERNAL_INTERRUPT */
@@ -1327,10 +1327,10 @@ static void nvmx_update_apicv(struct vcpu *v)
         ppr = vlapic_set_ppr(vlapic);
         WARN_ON((ppr & 0xf0) != (vector & 0xf0));
 
-        status = vector << 8;
+        status = vector << VMX_GUEST_INTR_STATUS_SVI_OFFSET;
         rvi = vlapic_has_pending_irq(v);
         if ( rvi != -1 )
-            status |= rvi & 0xff;
+            status |= rvi & VMX_GUEST_INTR_STATUS_SUBFIELD_BITMASK;
 
         __vmwrite(GUEST_INTR_STATUS, status);
     }
@@ -2161,7 +2161,8 @@ int nvmx_n2_vmexit_handler(struct cpu_user_regs *regs,
     case EXIT_REASON_EXCEPTION_NMI:
     {
         unsigned long intr_info;
-        u32 valid_mask = (X86_EVENTTYPE_HW_EXCEPTION << 8) |
+        u32 valid_mask = MASK_INSR(X86_EVENTTYPE_HW_EXCEPTION,
+                                  INTR_INFO_INTR_TYPE_MASK) |
                          INTR_INFO_VALID_MASK;
         u64 exec_bitmap;
         int vector;
@@ -2350,8 +2351,8 @@ int nvmx_n2_vmexit_handler(struct cpu_user_regs *regs,
         u32 mask = 0;
 
         __vmread(EXIT_QUALIFICATION, &exit_qualification);
-        cr = exit_qualification & 0xf;
-        write = (exit_qualification >> 4) & 3;
+        cr = VMX_CONTROL_REG_ACCESS_NUM(exit_qualification);
+        write = VMX_CONTROL_REG_ACCESS_TYPE(exit_qualification);
         /* also according to guest exec_control */
         ctrl = __n2_exec_control(v);
 
@@ -2443,8 +2444,9 @@ int nvmx_n2_vmexit_handler(struct cpu_user_regs *regs,
                 u64 cr0_gh_mask = __get_vvmcs(nvcpu->nv_vvmcx, 
CR0_GUEST_HOST_MASK);
 
                 __vmread(CR0_READ_SHADOW, &old_val);
-                old_val &= 0xf;
-                val = (exit_qualification >> 16) & 0xf;
+                old_val &= X86_CR0_PE|X86_CR0_MP|X86_CR0_EM|X86_CR0_TS;
+                val = VMX_CONTROL_REG_ACCESS_DATA(exit_qualification) &
+                      (X86_CR0_PE|X86_CR0_MP|X86_CR0_EM|X86_CR0_TS);
                 changed_bits = old_val ^ val;
                 if ( changed_bits & cr0_gh_mask )
                     nvcpu->nv_vmexit_pending = 1;
diff --git a/xen/include/asm-x86/hvm/vmx/vmx.h 
b/xen/include/asm-x86/hvm/vmx/vmx.h
index c8bb548..91c5e18 100644
--- a/xen/include/asm-x86/hvm/vmx/vmx.h
+++ b/xen/include/asm-x86/hvm/vmx/vmx.h
@@ -207,8 +207,10 @@ static inline unsigned long pi_get_pir(struct pi_desc 
*pi_desc, int group)
 # define VMX_CONTROL_REG_ACCESS_TYPE_MOV_FROM_CR 1
 # define VMX_CONTROL_REG_ACCESS_TYPE_CLTS        2
 # define VMX_CONTROL_REG_ACCESS_TYPE_LMSW        3
- /* 10:8 - general purpose register operand */
+ /* 11:8 - general purpose register operand */
 #define VMX_CONTROL_REG_ACCESS_GPR(eq)  (((eq) >> 8) & 0xf)
+ /* 31:16 - LMSW source data */
+#define VMX_CONTROL_REG_ACCESS_DATA(eq)  ((uint32_t)(eq) >> 16)
 
 /*
  * Access Rights
--
generated by git-patchbot for /home/xen/git/xen.git#master

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