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x86/hvm/vmx: Trace traps and realmode exits
Add some more tracing to vmexits that don't currently have trace information: * VMX realmode emulation * Various VMX traps * Fast-pathed APIC accesses Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com> Committed-by: Keir Fraser <keir@xen.org>
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George Dunlap committed
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@@ -2217,6 +2217,7 @@ static int vmx_handle_eoi_write(void)
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{
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update_guest_eip(); /* Safe: APIC data write */
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vlapic_EOI_set(vcpu_vlapic(current));
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HVMTRACE_0D(VLAPIC);
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return 1;
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}
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@@ -2324,6 +2325,7 @@ asmlinkage void vmx_vmexit_handler(struct cpu_user_regs *regs)
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{
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perfc_incr(realmode_exits);
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v->arch.hvm_vmx.vmx_emulate = 1;
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HVMTRACE_0D(REALMODE_EMULATE);
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return;
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}
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case EXIT_REASON_EXTERNAL_INTERRUPT:
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@@ -2343,6 +2345,7 @@ asmlinkage void vmx_vmexit_handler(struct cpu_user_regs *regs)
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default:
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v->arch.hvm_vmx.vmx_emulate = 1;
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perfc_incr(realmode_exits);
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HVMTRACE_0D(REALMODE_EMULATE);
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return;
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}
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}
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@@ -2386,6 +2389,7 @@ asmlinkage void vmx_vmexit_handler(struct cpu_user_regs *regs)
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* Table 23-1, "Exit Qualification for Debug Exceptions").
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*/
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exit_qualification = __vmread(EXIT_QUALIFICATION);
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HVMTRACE_1D(TRAP_DEBUG, exit_qualification);
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write_debugreg(6, exit_qualification | 0xffff0ff0);
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if ( !v->domain->debugger_attached || cpu_has_monitor_trap_flag )
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goto exit_and_crash;
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@@ -2393,6 +2397,7 @@ asmlinkage void vmx_vmexit_handler(struct cpu_user_regs *regs)
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break;
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case TRAP_int3:
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{
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HVMTRACE_1D(TRAP, vector);
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if ( v->domain->debugger_attached )
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{
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update_guest_eip(); /* Safe: INT3 */
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@@ -2415,6 +2420,7 @@ asmlinkage void vmx_vmexit_handler(struct cpu_user_regs *regs)
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goto exit_and_crash;
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}
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case TRAP_no_device:
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HVMTRACE_1D(TRAP, vector);
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vmx_fpu_dirty_intercept();
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break;
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case TRAP_page_fault:
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@@ -2455,9 +2461,11 @@ asmlinkage void vmx_vmexit_handler(struct cpu_user_regs *regs)
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/* Already handled above. */
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break;
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case TRAP_invalid_op:
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HVMTRACE_1D(TRAP, vector);
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vmx_vmexit_ud_intercept(regs);
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break;
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default:
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HVMTRACE_1D(TRAP, vector);
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goto exit_and_crash;
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}
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break;
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@@ -50,6 +50,10 @@
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#define DO_TRC_HVM_CLTS DEFAULT_HVM_MISC
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#define DO_TRC_HVM_LMSW DEFAULT_HVM_MISC
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#define DO_TRC_HVM_LMSW64 DEFAULT_HVM_MISC
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#define DO_TRC_HVM_REALMODE_EMULATE DEFAULT_HVM_MISC
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#define DO_TRC_HVM_TRAP DEFAULT_HVM_MISC
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#define DO_TRC_HVM_TRAP_DEBUG DEFAULT_HVM_MISC
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#define DO_TRC_HVM_VLAPIC DEFAULT_HVM_MISC
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#ifdef __x86_64__
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@@ -164,6 +164,10 @@
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#define TRC_HVM_RDTSC (TRC_HVM_HANDLER + 0x1a)
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#define TRC_HVM_INTR_WINDOW (TRC_HVM_HANDLER + 0x20)
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#define TRC_HVM_NPF (TRC_HVM_HANDLER + 0x21)
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#define TRC_HVM_REALMODE_EMULATE (TRC_HVM_HANDLER + 0x22)
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#define TRC_HVM_TRAP (TRC_HVM_HANDLER + 0x23)
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#define TRC_HVM_TRAP_DEBUG (TRC_HVM_HANDLER + 0x24)
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#define TRC_HVM_VLAPIC (TRC_HVM_HANDLER + 0x25)
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#define TRC_HVM_IOPORT_WRITE (TRC_HVM_HANDLER + 0x216)
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#define TRC_HVM_IOMEM_WRITE (TRC_HVM_HANDLER + 0x217)
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