linux-kernel - Re: [RFC 3/5] powerpc: kvm: drop 32-bit book3s

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Message-ID: <3a2fadc3-f594-492f-805a-148043436995@csgroup.eu>
Date: Fri, 13 Dec 2024 11:27:32 +0100
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Arnd Bergmann <arnd@...db.de>, Arnd Bergmann <arnd@...nel.org>,
 kvm@...r.kernel.org
Cc: Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
 Huacai Chen <chenhuacai@...nel.org>, Jiaxun Yang <jiaxun.yang@...goat.com>,
 Michael Ellerman <mpe@...erman.id.au>, Nicholas Piggin <npiggin@...il.com>,
 Naveen N Rao <naveen@...nel.org>, Madhavan Srinivasan <maddy@...ux.ibm.com>,
 Alexander Graf <graf@...zon.com>, Crystal Wood <crwood@...hat.com>,
 Anup Patel <anup@...infault.org>, Atish Patra <atishp@...shpatra.org>,
 Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt
 <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>,
 Sean Christopherson <seanjc@...gle.com>, Paolo Bonzini
 <pbonzini@...hat.com>, Thomas Gleixner <tglx@...utronix.de>,
 Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
 Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
 "H. Peter Anvin" <hpa@...or.com>, Vitaly Kuznetsov <vkuznets@...hat.com>,
 David Woodhouse <dwmw2@...radead.org>, Paul Durrant <paul@....org>,
 Marc Zyngier <maz@...nel.org>, linux-kernel@...r.kernel.org,
 linux-mips@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
 kvm-riscv@...ts.infradead.org, linux-riscv@...ts.infradead.org
Subject: Re: [RFC 3/5] powerpc: kvm: drop 32-bit book3s

Le 13/12/2024 à 11:04, Arnd Bergmann a écrit :
> diff --git a/arch/powerpc/kernel/head_32.h b/arch/powerpc/kernel/head_32.h
> index 9cba7dbf58dd..24e89dadc74d 100644
> --- a/arch/powerpc/kernel/head_32.h
> +++ b/arch/powerpc/kernel/head_32.h
> @@ -172,7 +172,6 @@ _ASM_NOKPROBE_SYMBOL(\name\()_virt)
>   #define	START_EXCEPTION(n, label)		\
>   	__HEAD;					\
>   	. = n;					\
> -	DO_KVM n;				\
>   label:
>   
>   #else

Then the complete macro should go away because both versions are now 
identical:

-#ifdef CONFIG_PPC_BOOK3S
-#define	START_EXCEPTION(n, label)		\
-	__HEAD;					\
-	. = n;					\
-label:
-
-#else
  #define	START_EXCEPTION(n, label)		\
  	__HEAD;					\
  	. = n;					\
  label:

-#endif