[PATCH] arm64: paravirt: remove conduit check in has_pv_steal_clock

From: Usama Arif <usama.arif@bytedance.com>
To: linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org,
	virtualization@lists.linux-foundation.org, linux@armlinux.org.uk,
	yezengruan@huawei.com, catalin.marinas@arm.com, will@kernel.org,
	maz@kernel.org, steven.price@arm.com, mark.rutland@arm.com
Cc: fam.zheng@bytedance.com, liangma@liangbit.com,
	punit.agrawal@bytedance.com,
	Usama Arif <usama.arif@bytedance.com>
Subject: [PATCH] arm64: paravirt: remove conduit check in has_pv_steal_clock
Date: Fri,  4 Nov 2022 06:16:59 +0000	[thread overview]
Message-ID: <20221104061659.4116508-1-usama.arif@bytedance.com> (raw)

arm_smccc_1_1_invoke() which is called later on in the function
will return failure if there's no conduit (or pre-SMCCC 1.1),
hence the check is unnecessary.

Suggested-by: Steven Price <steven.price@arm.com>
Signed-off-by: Usama Arif <usama.arif@bytedance.com>
---
 arch/arm64/kernel/paravirt.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/arch/arm64/kernel/paravirt.c b/arch/arm64/kernel/paravirt.c
index 57c7c211f8c7..aa718d6a9274 100644
--- a/arch/arm64/kernel/paravirt.c
+++ b/arch/arm64/kernel/paravirt.c
@@ -141,10 +141,6 @@ static bool __init has_pv_steal_clock(void)
 {
 	struct arm_smccc_res res;
 
-	/* To detect the presence of PV time support we require SMCCC 1.1+ */
-	if (arm_smccc_1_1_get_conduit() == SMCCC_CONDUIT_NONE)
-		return false;
-
 	arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_FEATURES_FUNC_ID,
 			     ARM_SMCCC_HV_PV_TIME_FEATURES, &res);
 
-- 
2.25.1

