linux-kernel - Re: [PATCH] arch/x86/entry_fred: don't set up KVM IRQs if KVM is disabled

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Date: Thu, 15 Feb 2024 11:55:30 -0800
From: Sean Christopherson <seanjc@...gle.com>
To: Max Kellermann <max.kellermann@...os.com>
Cc: hpa@...or.com, x86@...nel.org, linux-kernel@...r.kernel.org, 
	Stephen Rothwell <sfr@...b.auug.org.au>, Paolo Bonzini <pbonzini@...hat.com>, kvm@...r.kernel.org
Subject: Re: [PATCH] arch/x86/entry_fred: don't set up KVM IRQs if KVM is disabled

+Paolo and Stephen

FYI, there's a build failure in -next due to a collision between kvm/next and
tip/x86/fred.  The above makes everything happy.

On Thu, Feb 15, 2024, Max Kellermann wrote:
> When KVM is disabled, the POSTED_INTR_* macros do not exist, and the
> build fails.
> 
> Fixes: 14619d912b65 ("x86/fred: FRED entry/exit and dispatch code")
> Signed-off-by: Max Kellermann <max.kellermann@...os.com>
> ---
>  arch/x86/entry/entry_fred.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/x86/entry/entry_fred.c b/arch/x86/entry/entry_fred.c
> index ac120cbdaaf2..660b7f7f9a79 100644
> --- a/arch/x86/entry/entry_fred.c
> +++ b/arch/x86/entry/entry_fred.c
> @@ -114,9 +114,11 @@ static idtentry_t sysvec_table[NR_SYSTEM_VECTORS] __ro_after_init = {
>  
>  	SYSVEC(IRQ_WORK_VECTOR,			irq_work),
>  
> +#if IS_ENABLED(CONFIG_KVM)
>  	SYSVEC(POSTED_INTR_VECTOR,		kvm_posted_intr_ipi),
>  	SYSVEC(POSTED_INTR_WAKEUP_VECTOR,	kvm_posted_intr_wakeup_ipi),
>  	SYSVEC(POSTED_INTR_NESTED_VECTOR,	kvm_posted_intr_nested_ipi),
> +#endif
>  };
>  
>  static bool fred_setup_done __initdata;
> -- 
> 2.39.2