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Re: [PATCH v6 02/19] i386: invert hyperv_spinlock_attempts setting logic
From: |
Eduardo Habkost |
Subject: |
Re: [PATCH v6 02/19] i386: invert hyperv_spinlock_attempts setting logic with hv_passthrough |
Date: |
Fri, 30 Apr 2021 19:09:20 -0400 |
On Thu, Apr 22, 2021 at 06:11:13PM +0200, Vitaly Kuznetsov wrote:
> There is no need to have this special case: like all other Hyper-V
> enlightenments we can just use kernel's supplied value in hv_passthrough
> mode.
Worth documenting this behaviour at docs/hyperv.txt? I was
expecting all properties set explicitly to override
hv-passthrough.
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
>
> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
> ---
> target/i386/kvm/kvm.c | 6 +-----
> 1 file changed, 1 insertion(+), 5 deletions(-)
>
> diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c
> index ab073a5e9c44..afd173514da1 100644
> --- a/target/i386/kvm/kvm.c
> +++ b/target/i386/kvm/kvm.c
> @@ -1256,11 +1256,7 @@ static int hyperv_handle_properties(CPUState *cs,
> c = cpuid_find_entry(cpuid, HV_CPUID_ENLIGHTMENT_INFO, 0);
> if (c) {
> env->features[FEAT_HV_RECOMM_EAX] = c->eax;
> -
> - /* hv-spinlocks may have been overriden */
> - if (cpu->hyperv_spinlock_attempts !=
> HYPERV_SPINLOCK_NEVER_NOTIFY) {
> - c->ebx = cpu->hyperv_spinlock_attempts;
> - }
> + cpu->hyperv_spinlock_attempts = c->ebx;
> }
> c = cpuid_find_entry(cpuid, HV_CPUID_NESTED_FEATURES, 0);
> if (c) {
> --
> 2.30.2
>
--
Eduardo
- [PATCH v6 00/19] i386: KVM: expand Hyper-V features early, Vitaly Kuznetsov, 2021/04/22
- [PATCH v6 01/19] i386: keep hyperv_vendor string up-to-date, Vitaly Kuznetsov, 2021/04/22
- [PATCH v6 03/19] i386: always fill Hyper-V CPUID feature leaves from X86CPU data, Vitaly Kuznetsov, 2021/04/22
- [PATCH v6 02/19] i386: invert hyperv_spinlock_attempts setting logic with hv_passthrough, Vitaly Kuznetsov, 2021/04/22
- Re: [PATCH v6 02/19] i386: invert hyperv_spinlock_attempts setting logic with hv_passthrough,
Eduardo Habkost <=
- [PATCH v6 04/19] i386: stop using env->features[] for filling Hyper-V CPUIDs, Vitaly Kuznetsov, 2021/04/22
- [PATCH v6 06/19] i386: introduce hv_cpuid_get_host(), Vitaly Kuznetsov, 2021/04/22
- [PATCH v6 05/19] i386: introduce hyperv_feature_supported(), Vitaly Kuznetsov, 2021/04/22
- [PATCH v6 07/19] i386: drop FEAT_HYPERV feature leaves, Vitaly Kuznetsov, 2021/04/22
- [PATCH v6 08/19] i386: introduce hv_cpuid_cache, Vitaly Kuznetsov, 2021/04/22
- [PATCH v6 11/19] i386: switch hyperv_expand_features() to using error_setg(), Vitaly Kuznetsov, 2021/04/22
- [PATCH v6 09/19] i386: split hyperv_handle_properties() into hyperv_expand_features()/hyperv_fill_cpuids(), Vitaly Kuznetsov, 2021/04/22
- [PATCH v6 17/19] i386: HV_HYPERCALL_AVAILABLE privilege bit is always needed, Vitaly Kuznetsov, 2021/04/22
- [PATCH v6 10/19] i386: move eVMCS enablement to hyperv_init_vcpu(), Vitaly Kuznetsov, 2021/04/22