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From: Ankur Arora <ankur.a.arora@oracle.com>
To: linux-pm@vger.kernel.org, kvm@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org
Cc: catalin.marinas@arm.com, will@kernel.org, x86@kernel.org,
	pbonzini@redhat.com, vkuznets@redhat.com, rafael@kernel.org,
	daniel.lezcano@linaro.org, peterz@infradead.org, arnd@arndb.de,
	lenb@kernel.org, mark.rutland@arm.com, harisokn@amazon.com,
	mtosatti@redhat.com, sudeep.holla@arm.com, cl@gentwo.org,
	maz@kernel.org, misono.tomohiro@fujitsu.com, maobibo@loongson.cn,
	zhenglifeng1@huawei.com, joao.m.martins@oracle.com,
	boris.ostrovsky@oracle.com, konrad.wilk@oracle.com
Subject: [PATCH v10 08/11] governors/haltpoll: drop kvm_para_available() check
Date: Tue, 18 Feb 2025 13:33:34 -0800	[thread overview]
Message-ID: <20250218213337.377987-9-ankur.a.arora@oracle.com> (raw)
In-Reply-To: <20250218213337.377987-1-ankur.a.arora@oracle.com>

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

The haltpoll governor is selected either by the cpuidle-haltpoll
driver, or explicitly by the user.
In particular, it is never selected by default since it has the lowest
rating of all governors (menu=20, teo=19, ladder=10/25, haltpoll=9).

So, we can safely forgo the kvm_para_available() check. This also
allows cpuidle-haltpoll to be tested on baremetal.

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Mihai Carabas <mihai.carabas@oracle.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Signed-off-by: Ankur Arora <ankur.a.arora@oracle.com>
---
 drivers/cpuidle/governors/haltpoll.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/cpuidle/governors/haltpoll.c b/drivers/cpuidle/governors/haltpoll.c
index 663b7f164d20..c8752f793e61 100644
--- a/drivers/cpuidle/governors/haltpoll.c
+++ b/drivers/cpuidle/governors/haltpoll.c
@@ -18,7 +18,6 @@
 #include <linux/tick.h>
 #include <linux/sched.h>
 #include <linux/module.h>
-#include <linux/kvm_para.h>
 #include <trace/events/power.h>
 
 static unsigned int guest_halt_poll_ns __read_mostly = 200000;
@@ -148,10 +147,7 @@ static struct cpuidle_governor haltpoll_governor = {
 
 static int __init init_haltpoll(void)
 {
-	if (kvm_para_available())
-		return cpuidle_register_governor(&haltpoll_governor);
-
-	return 0;
+	return cpuidle_register_governor(&haltpoll_governor);
 }
 
 postcore_initcall(init_haltpoll);
-- 
2.43.5


  parent reply	other threads:[~2025-02-18 21:34 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-02-18 21:33 [PATCH v10 00/11] arm64: support poll_idle() Ankur Arora
2025-02-18 21:33 ` [PATCH v10 01/11] cpuidle/poll_state: poll via smp_cond_load_relaxed_timewait() Ankur Arora
2025-05-13  5:29   ` Ankur Arora
2025-02-18 21:33 ` [PATCH v10 02/11] cpuidle: rename ARCH_HAS_CPU_RELAX to ARCH_HAS_OPTIMIZED_POLL Ankur Arora
2025-02-18 21:33 ` [PATCH v10 03/11] Kconfig: move ARCH_HAS_OPTIMIZED_POLL to arch/Kconfig Ankur Arora
2025-02-18 21:33 ` [PATCH v10 04/11] arm64: define TIF_POLLING_NRFLAG Ankur Arora
2025-02-18 21:33 ` [PATCH v10 05/11] arm64: add support for poll_idle() Ankur Arora
2025-02-18 21:33 ` [PATCH v10 06/11] ACPI: processor_idle: Support polling state for LPI Ankur Arora
2025-02-18 21:33 ` [PATCH v10 07/11] cpuidle-haltpoll: define arch_haltpoll_want() Ankur Arora
2025-02-18 21:33 ` Ankur Arora [this message]
2025-02-24 16:57   ` [PATCH v10 08/11] governors/haltpoll: drop kvm_para_available() check Christoph Lameter (Ampere)
2025-02-25 19:06     ` Ankur Arora
2025-02-18 21:33 ` [PATCH v10 09/11] cpuidle-haltpoll: condition on ARCH_CPUIDLE_HALTPOLL Ankur Arora
2025-02-18 21:33 ` [PATCH v10 10/11] arm64: idle: export arch_cpu_idle() Ankur Arora
2025-04-11  3:32   ` Shuai Xue
2025-04-11 17:42     ` Okanovic, Haris
2025-04-11 20:57     ` Ankur Arora
2025-04-14  2:01       ` Shuai Xue
2025-04-14  3:46         ` Ankur Arora
2025-04-14  7:43           ` Shuai Xue
2025-04-15  6:24             ` Ankur Arora
2025-02-18 21:33 ` [PATCH v10 11/11] arm64: support cpuidle-haltpoll Ankur Arora
2025-05-13  5:23 ` [PATCH v10 00/11] arm64: support poll_idle() Ankur Arora

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