linux-kernel - [PATCH 2/7] x86: Move ARCH_HAS_CPU

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Message-Id: <1691581193-8416-3-git-send-email-mihai.carabas@oracle.com>
Date:   Wed,  9 Aug 2023 14:39:36 +0300
From:   Mihai Carabas <mihai.carabas@...cle.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Joao Martins <joao.m.martins@...cle.com>,
        Mihai Carabas <mihai.carabas@...cle.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        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>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Kees Cook <keescook@...omium.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Petr Mladek <pmladek@...e.com>,
        Ard Biesheuvel <ardb@...nel.org>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        Nicholas Piggin <npiggin@...il.com>,
        Juerg Haefliger <juerg.haefliger@...onical.com>,
        Mickaël Salaün <mic@...ikod.net>,
        Arnd Bergmann <arnd@...db.de>,
        Ankur Arora <ankur.a.arora@...cle.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        kvm@...r.kernel.org, linux-pm@...r.kernel.org
Subject: [PATCH 2/7] x86: Move ARCH_HAS_CPU_RELAX to arch

From: Joao Martins <joao.m.martins@...cle.com>

ARM64 is going to use it for haltpoll support (for poll-state)
so move the definition to be arch-agnostic and allow architectures
to override it.

Signed-off-by: Joao Martins <joao.m.martins@...cle.com>
Signed-off-by: Mihai Carabas <mihai.carabas@...cle.com>
---
 arch/Kconfig     | 3 +++
 arch/x86/Kconfig | 1 +
 2 files changed, 4 insertions(+)

diff --git a/arch/Kconfig b/arch/Kconfig
index aff2746c8af2..31bd138f406d 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -1371,6 +1371,9 @@ config RELR
 config ARCH_HAS_MEM_ENCRYPT
 	bool
 
+config ARCH_HAS_CPU_RELAX
+	bool
+
 config ARCH_HAS_CC_PLATFORM
 	bool
 
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 7422db409770..2eab3be6abbb 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -72,6 +72,7 @@ config X86
 	select ARCH_HAS_CACHE_LINE_SIZE
 	select ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION
 	select ARCH_HAS_CPU_FINALIZE_INIT
+	select ARCH_HAS_CPU_RELAX
 	select ARCH_HAS_CURRENT_STACK_POINTER
 	select ARCH_HAS_DEBUG_VIRTUAL
 	select ARCH_HAS_DEBUG_VM_PGTABLE	if !X86_PAE
-- 
1.8.3.1