From: "Filip Navara" <xnavara@volny.cz>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] VMport patch
Date: Sun, 20 Jan 2008 19:47:25 +0100 [thread overview]
Message-ID: <5b31733c0801201047o283aad77ndaae4ea23a1525d@mail.gmail.com> (raw)
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Hello,
the current version of QEMU emulates the VMware backdoor I/O port and it
works quite well. Unfortunately it doesn't emulate the VMware behavior of
ignoring the I/O permissions when accessing this special port. The attached
patch corrects it. It's important to ignore the permissions, so that user
mode VMware tools can communicate to the backdoor.
Best regards,
Filip Navara
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--- target-i386/helper.c 26 Jun 2007 08:35:18 -0000 1.84
+++ target-i386/helper.c 20 Jan 2008 18:33:33 -0000
@@ -486,7 +486,9 @@
static inline void check_io(int addr, int size)
{
int io_offset, val, mask;
-
+ /* VMware backdoor I/O port ignores priviledge control */
+ if (addr == 0x5658)
+ return;
/* TSS must be a valid 32 bit one */
if (!(env->tr.flags & DESC_P_MASK) ||
((env->tr.flags >> DESC_TYPE_SHIFT) & 0xf) != 9 ||
next reply other threads:[~2008-01-20 18:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-20 18:47 Filip Navara [this message]
2008-01-20 21:40 ` [Qemu-devel] VMport patch Anthony Liguori
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