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[Qemu-devel] [Bug 616769] Re: interrupt problem x86_64

From: Thomas Huth
Subject: [Qemu-devel] [Bug 616769] Re: interrupt problem x86_64
Date: Mon, 07 Nov 2016 18:37:26 -0000

Which version of QEMU did you use when you encountered this problem? Can
you still reproduce this issue with the latest version of QEMU?

** Changed in: qemu
       Status: New => Incomplete

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  interrupt problem x86_64

Status in QEMU:

Bug description:
  I'm studing the x86_64 arch to port colinux to this new architecture.

  For who does not know, colinux is a port of linux that runs on windows 
NATIVELY. Colinux is
  1) a small windows driver
  2) a kernel patched
  3) some windows user-space application that talk with linux kernel (network, 
console, ...)

  I have written the more internal part of colinux, that is the code that 
switch between windows and linux.
  This is done saving and restore the machine state :
  1) CR3
  2) IDT
  3) registers

  The problem I see is that after the switch I see the reboot of my virtual 
  I would say that the new IDT and/or CR3 is not flushed.
  My code is written in asm/C so I can follow the code step by step.
  I can say exactly the instruction that is broken.

  All my code runs nicely on bochs.
  I don't have an x86_64 real PC.

  If someone wants to repair this bug .... I'm here.

  Paolo Minazzi

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