[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH] i386: Support "-cpu host" on TCG too
From: |
Cornelia Huck |
Subject: |
Re: [Qemu-devel] [PATCH] i386: Support "-cpu host" on TCG too |
Date: |
Thu, 19 Jan 2017 15:52:50 +0100 |
On Tue, 17 Jan 2017 18:43:40 +0100
David Hildenbrand <address@hidden> wrote:
> Uncompiled and untested.
@Jason: have you given this a try?
> @Conny and Christian, feel free to pick up and modify if this makes
> sense
>
> From 4a2af1ca47421b68eb7677cd91af350dd9be4e0e Mon Sep 17 00:00:00 2001
> From: David Hildenbrand <address@hidden>
> Date: Tue, 17 Jan 2017 18:34:45 +0100
> Subject: [PATCH] s390x/cpumodel: allow the "host" model also for tcg
>
> Let's also allow the host model for tcg, therefore meaning
> "enable all features supported by the selected accelerator in the current
> host".
>
> Signed-off-by: David Hildenbrand <address@hidden>
> ---
> qapi-schema.json | 4 ++--
> target/s390x/cpu-qom.h | 1 -
> target/s390x/cpu_models.c | 34 ++++++++--------------------------
> 3 files changed, 10 insertions(+), 29 deletions(-)
(...)
> -#ifdef CONFIG_KVM
> static void s390_host_cpu_model_initfn(Object *obj)
> {
> + S390CPUModel *max_model;
> S390CPU *cpu = S390_CPU(obj);
> Error *err = NULL;
>
> - if (!kvm_enabled() || !kvm_s390_cpu_models_supported()) {
> + if (kvm_enabled() && !kvm_s390_cpu_models_supported()) {
> return;
> }
>
> - cpu->model = g_malloc0(sizeof(*cpu->model));
> - kvm_s390_get_host_cpu_model(cpu->model, &err);
> - if (err) {
> + max_model = get_max_cpu_model(&err);
> + if (err || !max_model) {
I think checking for !max_model is enough.
> error_report_err(err);
> - g_free(cpu->model);
> /* fallback to unsupported cpu models */
> - cpu->model = NULL;
> + return;
> }
> + /* copy the host model so it can be modified */
> + cpu->model = g_memdup(max_model, sizeof(*cpu->model));
> }
> -#endif
(...)
This gives us the same as before on kvm and z900 for tcg, so this seems
reasonable to me.
Re: [Qemu-devel] [PATCH] i386: Support "-cpu host" on TCG too, David Hildenbrand, 2017/01/17
- Re: [Qemu-devel] [PATCH] i386: Support "-cpu host" on TCG too,
Cornelia Huck <=
Re: [Qemu-devel] [PATCH] i386: Support "-cpu host" on TCG too, Daniel P. Berrange, 2017/01/19