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From: Mihai Carabas <mihai.carabas@oracle.com>
To: linux-arm-kernel@lists.infradead.org
Cc: kvm@vger.kernel.org, linux-pm@vger.kernel.org,
	linux-kernel@vger.kernel.org, catalin.marinas@arm.com,
	will@kernel.org, tglx@linutronix.de, mingo@redhat.com,
	bp@alien8.de, x86@kernel.org, hpa@zytor.com, pbonzini@redhat.com,
	wanpengli@tencent.com, vkuznets@redhat.com, rafael@kernel.org,
	daniel.lezcano@linaro.org, akpm@linux-foundation.org,
	pmladek@suse.com, peterz@infradead.org, dianders@chromium.org,
	npiggin@gmail.com, rick.p.edgecombe@intel.com,
	joao.m.martins@oracle.com, juerg.haefliger@canonical.com,
	mic@digikod.net, mihai.carabas@oracle.com, arnd@arndb.de,
	ankur.a.arora@oracle.com
Subject: [PATCH 6/7] cpuidle-haltpoll: ARM64 support
Date: Mon, 20 Nov 2023 16:01:37 +0200	[thread overview]
Message-ID: <1700488898-12431-7-git-send-email-mihai.carabas@oracle.com> (raw)
In-Reply-To: <1700488898-12431-1-git-send-email-mihai.carabas@oracle.com>

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

To test whether it's a guest or not for the default cases, the haltpoll
driver uses the kvm_para* helpers to find out if it's a guest or not.

ARM64 doesn't have or defined any of these, so it remains disabled on
the default. Although it allows to be force-loaded.

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Mihai Carabas <mihai.carabas@oracle.com>
---
 drivers/cpuidle/Kconfig | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/cpuidle/Kconfig b/drivers/cpuidle/Kconfig
index cac5997dca50..067927eda466 100644
--- a/drivers/cpuidle/Kconfig
+++ b/drivers/cpuidle/Kconfig
@@ -35,7 +35,7 @@ config CPU_IDLE_GOV_TEO
 
 config CPU_IDLE_GOV_HALTPOLL
 	bool "Haltpoll governor (for virtualized systems)"
-	depends on KVM_GUEST
+	depends on (X86 && KVM_GUEST) || ARM64
 	help
 	  This governor implements haltpoll idle state selection, to be
 	  used in conjunction with the haltpoll cpuidle driver, allowing
@@ -73,7 +73,7 @@ endmenu
 
 config HALTPOLL_CPUIDLE
 	tristate "Halt poll cpuidle driver"
-	depends on X86 && KVM_GUEST
+	depends on (X86 && KVM_GUEST) || ARM64
 	select CPU_IDLE_GOV_HALTPOLL
 	default y
 	help
-- 
1.8.3.1


WARNING: multiple messages have this Message-ID (diff)
From: Mihai Carabas <mihai.carabas@oracle.com>
To: linux-arm-kernel@lists.infradead.org
Cc: kvm@vger.kernel.org, linux-pm@vger.kernel.org,
	linux-kernel@vger.kernel.org, catalin.marinas@arm.com,
	will@kernel.org, tglx@linutronix.de, mingo@redhat.com,
	bp@alien8.de, x86@kernel.org, hpa@zytor.com, pbonzini@redhat.com,
	wanpengli@tencent.com, vkuznets@redhat.com, rafael@kernel.org,
	daniel.lezcano@linaro.org, akpm@linux-foundation.org,
	pmladek@suse.com, peterz@infradead.org, dianders@chromium.org,
	npiggin@gmail.com, rick.p.edgecombe@intel.com,
	joao.m.martins@oracle.com, juerg.haefliger@canonical.com,
	mic@digikod.net, mihai.carabas@oracle.com, arnd@arndb.de,
	ankur.a.arora@oracle.com
Subject: [PATCH 6/7] cpuidle-haltpoll: ARM64 support
Date: Mon, 20 Nov 2023 16:01:37 +0200	[thread overview]
Message-ID: <1700488898-12431-7-git-send-email-mihai.carabas@oracle.com> (raw)
In-Reply-To: <1700488898-12431-1-git-send-email-mihai.carabas@oracle.com>

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

To test whether it's a guest or not for the default cases, the haltpoll
driver uses the kvm_para* helpers to find out if it's a guest or not.

ARM64 doesn't have or defined any of these, so it remains disabled on
the default. Although it allows to be force-loaded.

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Mihai Carabas <mihai.carabas@oracle.com>
---
 drivers/cpuidle/Kconfig | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/cpuidle/Kconfig b/drivers/cpuidle/Kconfig
index cac5997dca50..067927eda466 100644
--- a/drivers/cpuidle/Kconfig
+++ b/drivers/cpuidle/Kconfig
@@ -35,7 +35,7 @@ config CPU_IDLE_GOV_TEO
 
 config CPU_IDLE_GOV_HALTPOLL
 	bool "Haltpoll governor (for virtualized systems)"
-	depends on KVM_GUEST
+	depends on (X86 && KVM_GUEST) || ARM64
 	help
 	  This governor implements haltpoll idle state selection, to be
 	  used in conjunction with the haltpoll cpuidle driver, allowing
@@ -73,7 +73,7 @@ endmenu
 
 config HALTPOLL_CPUIDLE
 	tristate "Halt poll cpuidle driver"
-	depends on X86 && KVM_GUEST
+	depends on (X86 && KVM_GUEST) || ARM64
 	select CPU_IDLE_GOV_HALTPOLL
 	default y
 	help
-- 
1.8.3.1


_______________________________________________
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2023-11-20 15:16 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-11-20 14:01 [PATCH v2] Enable haltpoll for arm64 Mihai Carabas
2023-11-20 14:01 ` Mihai Carabas
2023-11-20 14:01 ` [PATCH 1/7] x86: Move ARCH_HAS_CPU_RELAX to arch Mihai Carabas
2023-11-20 14:01   ` Mihai Carabas
2023-11-27 14:44   ` Petr Mladek
2023-11-27 14:44     ` Petr Mladek
2023-11-28 14:09     ` Mihai Carabas
2023-11-28 14:09       ` Mihai Carabas
2023-11-20 14:01 ` [PATCH 2/7] x86/kvm: Move haltpoll_want() to be arch defined Mihai Carabas
2023-11-20 14:01   ` Mihai Carabas
2023-11-29 20:55   ` Rafael J. Wysocki
2023-11-29 20:55     ` Rafael J. Wysocki
2023-11-20 14:01 ` [PATCH 3/7] governors/haltpoll: Drop kvm_para_available() check Mihai Carabas
2023-11-20 14:01   ` Mihai Carabas
2023-11-20 14:01 ` [PATCH 4/7] arm64: Select ARCH_HAS_CPU_RELAX Mihai Carabas
2023-11-20 14:01   ` Mihai Carabas
2023-11-20 14:01 ` [PATCH 5/7] arm64: Define TIF_POLLING_NRFLAG Mihai Carabas
2023-11-20 14:01   ` Mihai Carabas
2023-11-20 14:01 ` Mihai Carabas [this message]
2023-11-20 14:01   ` [PATCH 6/7] cpuidle-haltpoll: ARM64 support Mihai Carabas
2023-11-20 14:01 ` [PATCH 7/7] cpuidle/poll_state: replace cpu_relax with smp_cond_load_relaxed Mihai Carabas
2023-11-20 14:01   ` Mihai Carabas
2023-11-22 20:51   ` Christoph Lameter
2023-11-22 20:51     ` Christoph Lameter
2023-11-22 21:33     ` Mihai Carabas
2023-11-22 21:33       ` Mihai Carabas
2023-11-27 20:17       ` Christoph Lameter (Ampere)
2023-11-27 20:17         ` Christoph Lameter (Ampere)
2023-12-01  6:59         ` Ankur Arora
2023-12-01  6:59           ` Ankur Arora
2023-12-11 11:46   ` Will Deacon
2023-12-11 11:46     ` Will Deacon
2024-01-28 21:22     ` Mihai Carabas
2024-01-28 21:22       ` Mihai Carabas
2024-01-29 18:15       ` Will Deacon
2024-01-29 18:15         ` Will Deacon
2024-02-05 12:28         ` Mihai Carabas
2024-02-05 12:28           ` Mihai Carabas
2024-02-05 19:33           ` Ankur Arora
2024-02-05 19:33             ` Ankur Arora
2024-01-17 21:19 ` [PATCH v2] Enable haltpoll for arm64 Christoph Lameter (Ampere)
2024-01-17 21:19   ` Christoph Lameter (Ampere)
2024-01-25 14:39 ` Mihai Carabas
2024-01-25 14:39   ` Mihai Carabas
2024-01-25 15:16   ` Rafael J. Wysocki
2024-01-25 15:16     ` Rafael J. Wysocki

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