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[Qemu-devel] Re: [PATCH] temporary fix for on_vcpu
From: |
Jan Kiszka |
Subject: |
[Qemu-devel] Re: [PATCH] temporary fix for on_vcpu |
Date: |
Fri, 11 Sep 2009 17:56:08 +0200 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
Glauber Costa wrote:
> Recent changes made on_vcpu hit the abort() path, even with the IO thread
> disabled. This is because cpu_single_env is no longer set when we call this
> function. Although the correct fix is a little bit more complicated that that,
> the recent thread in which I proposed qemu_queue_work (which fixes that, btw),
> is likely to go on a quite different direction.
>
> So for the benefit of those using guest debugging, I'm proposing this simple
> fix in the interim.
>
> Signed-off-by: Glauber Costa <address@hidden>
> ---
> kvm-all.c | 4 ++++
> 1 files changed, 4 insertions(+), 0 deletions(-)
>
> diff --git a/kvm-all.c b/kvm-all.c
> index df4e849..2c24440 100644
> --- a/kvm-all.c
> +++ b/kvm-all.c
> @@ -902,11 +902,15 @@ void kvm_setup_guest_memory(void *start, size_t size)
> #ifdef KVM_CAP_SET_GUEST_DEBUG
> static void on_vcpu(CPUState *env, void (*func)(void *data), void *data)
> {
> +#ifdef CONFIG_IOTHREAD
> if (env == cpu_single_env) {
> func(data);
> return;
> }
> abort();
> +#else
> + func(data);
spaces++ :) But the workaround works.
> +#endif
> }
>
> struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *env,
Unless there is hope to fix kvm in iothread mode soon, we should issue a
warning or even disable kvm support in that setup. That is particularly
important for 0.11-stable.
Jan
--
Siemens AG, Corporate Technology, CT SE 2
Corporate Competence Center Embedded Linux