From: Paolo Bonzini <pbonzini@redhat.com>
To: Andrea Arcangeli <aarcange@redhat.com>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>,
Sean Christopherson <sean.j.christopherson@intel.com>
Subject: Re: [PATCH 03/13] kvm: monolithic: fixup x86-32 build
Date: Tue, 5 Nov 2019 11:37:47 +0100 [thread overview]
Message-ID: <678358c1-0621-3d2a-186e-b60742b2a286@redhat.com> (raw)
In-Reply-To: <6ed4a5cd-38b1-04f8-e3d5-3327a1bd5d87@redhat.com>
On 05/11/19 11:04, Paolo Bonzini wrote:
> On 04/11/19 23:59, Andrea Arcangeli wrote:
>> kvm_x86_set_hv_timer and kvm_x86_cancel_hv_timer needs to be defined
>> to succeed the 32bit kernel build, but they can't be called.
>>
>> Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
>> ---
>> arch/x86/kvm/vmx/vmx.c | 11 +++++++++++
>> 1 file changed, 11 insertions(+)
>>
>> diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
>> index bd17ad61f7e3..1a58ae38c8f2 100644
>> --- a/arch/x86/kvm/vmx/vmx.c
>> +++ b/arch/x86/kvm/vmx/vmx.c
>> @@ -7195,6 +7195,17 @@ void kvm_x86_cancel_hv_timer(struct kvm_vcpu *vcpu)
>> {
>> to_vmx(vcpu)->hv_deadline_tsc = -1;
>> }
>> +#else
>> +int kvm_x86_set_hv_timer(struct kvm_vcpu *vcpu, u64 guest_deadline_tsc,
>> + bool *expired)
>> +{
>> + BUG();
>> +}
>> +
>> +void kvm_x86_cancel_hv_timer(struct kvm_vcpu *vcpu)
>> +{
>> + BUG();
>> +}
>> #endif
>>
>> void kvm_x86_sched_in(struct kvm_vcpu *vcpu, int cpu)
>>
>
> I'll check for how long this has been broken. It may be the proof that
> we can actually drop 32-bit KVM support.
Ah no, I was confused because this series is not bisectable (in addition
to doing two things at a same time, namely the monolithic kvm.ko and the
retpoline eliminations).
I have picked up the patches that are independent of the monolithic
kvm.ko work or can be considered bugfixes.
For the rest, please do this before posting again:
- ensure that everything is bisectable
- look into how to remove the modpost warnings. A simple (though
somewhat ugly) way is to keep a kvm.ko module that includes common
virt/kvm/ code as well as, for x86 only, page_track.o. A few functions,
such as kvm_mmu_gfn_disallow_lpage and kvm_mmu_gfn_allow_lpage, would
have to be moved into mmu.h, but that's not a big deal.
- provide at least some examples of replacing the NULL kvm_x86_ops
checks with error codes in the function (or just early "return"s). I
can help with the others, but remember that for the patch to be merged,
kvm_x86_ops must be removed completely.
Thanks,
Paolo
next prev parent reply other threads:[~2019-11-05 10:37 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-04 22:59 [PATCH 00/13] KVM monolithic v3 Andrea Arcangeli
2019-11-04 22:59 ` [PATCH 01/13] KVM: monolithic: x86: remove kvm.ko Andrea Arcangeli
2019-11-04 22:59 ` [PATCH 02/13] KVM: monolithic: x86: convert the kvm_x86_ops and kvm_pmu_ops methods to external functions Andrea Arcangeli
2019-11-04 22:59 ` [PATCH 03/13] kvm: monolithic: fixup x86-32 build Andrea Arcangeli
2019-11-05 10:04 ` Paolo Bonzini
2019-11-05 10:37 ` Paolo Bonzini [this message]
2019-11-05 13:54 ` Andrea Arcangeli
2019-11-05 14:09 ` Paolo Bonzini
2019-11-05 14:56 ` Andrea Arcangeli
2019-11-05 15:10 ` Paolo Bonzini
2019-11-08 13:56 ` Jessica Yu
2019-11-08 19:51 ` Paolo Bonzini
2019-11-08 20:01 ` Andrea Arcangeli
2019-11-08 21:02 ` Paolo Bonzini
2019-11-08 21:26 ` Andrea Arcangeli
2019-11-08 23:10 ` Paolo Bonzini
2019-11-09 3:30 ` Masahiro Yamada
2019-11-04 22:59 ` [PATCH 04/13] KVM: monolithic: x86: handle the request_immediate_exit variation Andrea Arcangeli
2019-11-04 22:59 ` [PATCH 05/13] KVM: monolithic: add more section prefixes Andrea Arcangeli
2019-11-05 10:16 ` Paolo Bonzini
2019-11-04 22:59 ` [PATCH 06/13] KVM: monolithic: x86: remove __exit section prefix from machine_unsetup Andrea Arcangeli
2019-11-05 10:16 ` Paolo Bonzini
2019-11-04 22:59 ` [PATCH 07/13] KVM: monolithic: x86: remove __init section prefix from kvm_x86_cpu_has_kvm_support Andrea Arcangeli
2019-11-05 10:16 ` Paolo Bonzini
2019-11-04 22:59 ` [PATCH 08/13] KVM: monolithic: remove exports Andrea Arcangeli
2019-11-04 22:59 ` [PATCH 09/13] KVM: monolithic: x86: drop the kvm_pmu_ops structure Andrea Arcangeli
2019-11-04 22:59 ` [PATCH 10/13] KVM: x86: optimize more exit handlers in vmx.c Andrea Arcangeli
2019-11-05 10:20 ` Paolo Bonzini
2019-11-04 22:59 ` [PATCH 11/13] KVM: retpolines: x86: eliminate retpoline from vmx.c exit handlers Andrea Arcangeli
2019-11-05 10:20 ` Paolo Bonzini
2019-11-04 23:00 ` [PATCH 12/13] KVM: retpolines: x86: eliminate retpoline from svm.c " Andrea Arcangeli
2019-11-05 10:21 ` Paolo Bonzini
2019-11-04 23:00 ` [PATCH 13/13] x86: retpolines: eliminate retpoline from msr event handlers Andrea Arcangeli
2019-11-05 10:21 ` Paolo Bonzini
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