Re: Windows XP internal Power error

ignazio.cassano@xxxxxxxxxxxxxxxxxxx wrote:
> Good moorning, I changed the -boot option in 'c' but when my Windows Xp boot
> to complete the installation I got the following errors:
>
> unhandled vm exit:  0x80000022
> rax 0000000000000800 rbx 00000000ffdff120 rcx 00000000c0000080 rdx 
> 0000000000000000
> rsi 0000000000000000 rdi 00000000c0000080 rsp 0000000080548de8 rbp 
> 0000000080548e3c
> r8  0000000000000000 r9  0000000000000000 r10 0000000000000000 r11 
> 0000000000000000
> r12 0000000000000000 r13 0000000000000000 r14 0000000000000000 r15 
> 0000000000000000
> rip 00000000804fee82 rflags 00000006
>
>
>   

A laptop came back from service yesterday and started exhibiting the 
same problem.  Turns out some Intel processors don't support the nx 
feature, which qemu reports as present.

I committed the attached patch to kvm/qemu.  It should fix the problem.


--
error compiling committee.c: too many arguments to function

Index: trunk/qemu/qemu-kvm.c
===================================================================
--- trunk/qemu/qemu-kvm.c       (revision 4183)
+++ trunk/qemu/qemu-kvm.c       (revision 4184)
@@ -440,7 +440,7 @@
     *rcx = env->regs[R_ECX];
     *rbx = env->regs[R_EBX];
     *rax = env->regs[R_EAX];
-    // don't report long mode/syscall if no native support
+    // don't report long mode/syscall/nx if no native support
     if (eax == 0x80000001) {
        unsigned long h_eax = eax, h_edx;
 
@@ -460,6 +460,9 @@
        // syscall
        if ((h_edx & 0x00000800) == 0)
            *rdx &= ~0x00000800ull;
+       // nx
+       if ((h_edx & 0x00100000) == 0)
+           *rdx &= ~0x00100000ull;
     }
     env = saved_env;
     return 0;
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