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[Qemu-devel] [Bug 1212402] Re: Enabling KVM with recent QEMU builds from
From: |
Julius Schwartzenberg |
Subject: |
[Qemu-devel] [Bug 1212402] Re: Enabling KVM with recent QEMU builds from GIT hang at boot on Ubuntu Precise AMD64 kernel 3.8.0 |
Date: |
Tue, 27 Aug 2013 19:04:59 -0000 |
It seems reverting this exact commit also works around the problem. I
have attached a patch against current head.
** Patch added: "Patch to revert problematic commit"
https://bugs.launchpad.net/qemu/+bug/1212402/+attachment/3790513/+files/0001-Revert-235e8982ad393e5611cb892df54881c872eea9e1.patch
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https://bugs.launchpad.net/bugs/1212402
Title:
Enabling KVM with recent QEMU builds from GIT hang at boot on Ubuntu
Precise AMD64 kernel 3.8.0
Status in QEMU:
New
Bug description:
When I compile QEMU from GIT and run it with
'./x86_64-softmmu/qemu-system-x86_64 -enable-kvm' it just hangs, the QEMU
screen stays black. (Everything else in the GTK UI is responsive though, I can
use the QEMU console as well.)
I'm running Ubuntu Precise with kernel 3.8.0-27-generic on an Intel Core2 Duo
P9500.
With bisecting, I found this commit caused the problem:
235e8982ad393e5611cb892df54881c872eea9e1 is the first bad commit
commit 235e8982ad393e5611cb892df54881c872eea9e1
Author: Jordan Justen <address@hidden>
Date: Wed May 29 01:27:26 2013 -0700
kvm: support using KVM_MEM_READONLY flag for regions
For readonly memory regions and rom devices in romd_mode,
we make use of the KVM_MEM_READONLY. A slot that uses
KVM_MEM_READONLY can be read from and code can execute from the
region, but writes will exit to qemu.
For rom devices with !romd_mode, we force the slot to be
removed so reads or writes to the region will exit to qemu.
(Note that a memory region in this state is not executable
within kvm.)
v7:
* Update for readable => romd_mode rename (5f9a5ea1)
Signed-off-by: Jordan Justen <address@hidden>
Reviewed-by: Xiao Guangrong <address@hidden> (v4)
Reviewed-by: Paolo Bonzini <address@hidden> (v5)
Message-id: address@hidden
Signed-off-by: Anthony Liguori <address@hidden>
:100644 100644 327ae12f08b9dddc796d753d8adfb1f70c78b2c1
8e7bbf8698f6bcaa5ae945ef86e7b51effde06fe M kvm-all.c
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