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[Qemu-devel] Re: [PATCH 24/32] check wether kqemu is enabled in open cod
From: |
Glauber Costa |
Subject: |
[Qemu-devel] Re: [PATCH 24/32] check wether kqemu is enabled in open code |
Date: |
Thu, 23 Oct 2008 12:31:11 -0200 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
On Thu, Oct 23, 2008 at 09:23:18AM -0500, Anthony Liguori wrote:
> Glauber Costa wrote:
>> kqemu is still too much spread around. The proper fix
>> usually involves rethinking a bit of kqemu logic so for now,
>> just check whether or not kqemu is enabled. If the kqemu accelerator
>> is not present, consider it not. Otherwise, check env field.
>>
>> Signed-off-by: Glauber Costa <address@hidden>
>> ---
>> cpu-exec.c | 2 +-
>> kqemu.c | 21 +++++++++++++++++++++
>> kqemu.h | 3 +++
>> 3 files changed, 25 insertions(+), 1 deletions(-)
>>
>> diff --git a/cpu-exec.c b/cpu-exec.c
>> index 18908d5..b47cf43 100644
>> --- a/cpu-exec.c
>> +++ b/cpu-exec.c
>> @@ -599,7 +599,7 @@ int cpu_exec(CPUState *env1)
>> {
>> if (next_tb != 0 &&
>> #ifdef USE_KQEMU
>> - (env->kqemu_enabled != 2) &&
>> + (!kqemu_kernel_enabled(env)) &&
>> #endif
>> tb->page_addr[1] == -1) {
>> tb_add_jump((TranslationBlock *)(next_tb & ~3), next_tb
>> & 3, tb);
>> diff --git a/kqemu.c b/kqemu.c
>> index 16ebe7d..f99a4f1 100644
>> --- a/kqemu.c
>> +++ b/kqemu.c
>> @@ -126,6 +126,27 @@ static int is_cpuid_supported(void)
>> }
>> #endif
>>
>> +/* FIXME: Should not be needed, since ideally, QEMUAccel would avoid all
>> kqemu tests
>> + * altogether
>> + */
>> +int kqemu_is_enabled(CPUState *env)
>> +{
>> + if (strcasecmp(current_accel->name, "kqemu")) {
>> + return 0;
>> + }
>> +
>> + return env->kqemu_enabled;
>> +
>> +}
>> +
>> +int kqemu_kernel_enabled(CPUState *env)
>> +{
>> + if (strcasecmp(current_accel->name, "kqemu")) {
>> + return 0;
>> + }
>> + return env->kqemu_enabled == 2;
>> +}
>>
>
> Why is kqemu_enabled part of the vcpu state? Wouldn't it always be 0
> even if we weren't using the accelerator?
It's temporary, to keep things compiling/working. It's dropped in a later patch.
>
> Regards,
>
> Anthony Liguori
>
>> static void kqemu_update_cpuid(CPUState *env)
>> {
>> int critical_features_mask, features, ext_features, ext_features_mask;
>> diff --git a/kqemu.h b/kqemu.h
>> index cf14179..62ba1d9 100644
>> --- a/kqemu.h
>> +++ b/kqemu.h
>> @@ -157,6 +157,9 @@ struct kqemu_phys_mem {
>> #define KQEMU_SET_PHYS_MEM _IOW('q', 5, struct kqemu_phys_mem)
>> #endif
>>
>> +int kqemu_is_enabled(CPUState *env);
>> +int kqemu_kernel_enabled(CPUState *env);
>> +
>> typedef struct KQEMUCPUstate {
>> int kqemu_enabled;
>> int last_io_time;
>>
>
- [Qemu-devel] Re: [PATCH 22/32] add next_cpu_index, (continued)
[Qemu-devel] [PATCH 23/32] move cpu_get_time_fast to kqemu.c, Glauber Costa, 2008/10/23
[Qemu-devel] [PATCH 26/32] provide two accelerators for kqemu, Glauber Costa, 2008/10/23
[Qemu-devel] [PATCH 24/32] check wether kqemu is enabled in open code, Glauber Costa, 2008/10/23
[Qemu-devel] [PATCH 20/32] accel_trace_io, Glauber Costa, 2008/10/23
[Qemu-devel] [PATCH 27/32] arch-specific hooks for accelerator, Glauber Costa, 2008/10/23
[Qemu-devel] [PATCH 31/32] remove kqemu_is_ok tests., Glauber Costa, 2008/10/23