linux-kernel - Re: [v2 PATCH 2/4] x86/kvm: Add definitions for virtual suspend time injection

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Date:   Fri, 13 Aug 2021 11:36:22 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Hikaru Nishida <hikalium@...omium.org>
Cc:     linux-kernel@...r.kernel.org, dme@....org, tglx@...utronix.de,
        mlevitsk@...hat.com, suleiman@...gle.com,
        Andy Lutomirski <luto@...nel.org>,
        Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        John Stultz <john.stultz@...aro.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Steve Wahl <steve.wahl@....com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>, kvm@...r.kernel.org,
        x86@...nel.org
Subject: Re: [v2 PATCH 2/4] x86/kvm: Add definitions for virtual suspend time
 injection

On Fri, Aug 06, 2021 at 07:07:08PM +0900, Hikaru Nishida wrote:
> Add definitions of MSR, KVM_FEATURE bit, IRQ and a structure called
> kvm_suspend_time that are used by later patchs to support the
> virtual suspend time injection mechanism.
> 
> Signed-off-by: Hikaru Nishida <hikalium@...omium.org>
> ---
> 

This patch series assumes that kvm is supported on all architectures and builds.
Where it isn't, it results in widespread compile errors such as ...

> diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
> index 8a364aa9881a..233ceb6cce1f 100644
> --- a/kernel/time/timekeeping.c
> +++ b/kernel/time/timekeeping.c
> @@ -22,6 +22,7 @@
>  #include <linux/pvclock_gtod.h>
>  #include <linux/compiler.h>
>  #include <linux/audit.h>
> +#include <linux/kvm_host.h>
>  
   In file included from kernel/time/timekeeping.c:25:
   In file included from include/linux/kvm_host.h:32:
>> include/uapi/linux/kvm.h:14:10: fatal error: 'asm/kvm.h' file not found
   #include <asm/kvm.h>
            ^~~~~~~~~~~

Guenter