From: Usama Arif <usama.arif@bytedance.com>
Date: Fri, 4 Nov 2022 06:16:59 +0000 (+0000)
Subject: arm64: paravirt: remove conduit check in has_pv_steal_clock
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=1e55b44d9ecd42dee7106ce635ffd855183f5221;p=linux.git

arm64: paravirt: remove conduit check in has_pv_steal_clock

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>
Reviewed-by: Steven Price <steven.price@arm.com>
Link: https://lore.kernel.org/r/20221104061659.4116508-1-usama.arif@bytedance.com
Signed-off-by: Will Deacon <will@kernel.org>
---

diff --git a/arch/arm64/kernel/paravirt.c b/arch/arm64/kernel/paravirt.c
index 57c7c211f8c71..aa718d6a9274a 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);