linux-kernel - [PATCH 09/14] loongarch/paravirt: use common code for paravirt_steal

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Message-ID: <20250911063433.13783-10-jgross@suse.com>
Date: Thu, 11 Sep 2025 08:34:28 +0200
From: Juergen Gross <jgross@...e.com>
To: linux-kernel@...r.kernel.org,
	loongarch@...ts.linux.dev,
	virtualization@...ts.linux.dev,
	x86@...nel.org
Cc: Juergen Gross <jgross@...e.com>,
	Huacai Chen <chenhuacai@...nel.org>,
	WANG Xuerui <kernel@...0n.name>,
	Ajay Kaher <ajay.kaher@...adcom.com>,
	Alexey Makhalov <alexey.makhalov@...adcom.com>,
	Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>
Subject: [PATCH 09/14] loongarch/paravirt: use common code for paravirt_steal_clock()

Remove the arch specific variant of paravirt_steal_clock() and use
the common one instead.

Signed-off-by: Juergen Gross <jgross@...e.com>
---
 arch/loongarch/Kconfig                |  1 +
 arch/loongarch/include/asm/paravirt.h | 10 ----------
 arch/loongarch/kernel/paravirt.c      |  7 -------
 3 files changed, 1 insertion(+), 17 deletions(-)

diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
index f0abc38c40ac..06bebad41c6f 100644
--- a/arch/loongarch/Kconfig
+++ b/arch/loongarch/Kconfig
@@ -678,6 +678,7 @@ source "kernel/livepatch/Kconfig"
 config PARAVIRT
 	bool "Enable paravirtualization code"
 	depends on AS_HAS_LVZ_EXTENSION
+	select HAVE_PV_STEAL_CLOCK_GEN
 	help
 	  This changes the kernel so it can modify itself when it is run
 	  under a hypervisor, potentially improving performance significantly
diff --git a/arch/loongarch/include/asm/paravirt.h b/arch/loongarch/include/asm/paravirt.h
index d219ea0d98ac..0111f0ad5f73 100644
--- a/arch/loongarch/include/asm/paravirt.h
+++ b/arch/loongarch/include/asm/paravirt.h
@@ -4,16 +4,6 @@
 
 #ifdef CONFIG_PARAVIRT
 
-#include <linux/static_call_types.h>
-
-u64 dummy_steal_clock(int cpu);
-DECLARE_STATIC_CALL(pv_steal_clock, dummy_steal_clock);
-
-static inline u64 paravirt_steal_clock(int cpu)
-{
-	return static_call(pv_steal_clock)(cpu);
-}
-
 int __init pv_ipi_init(void);
 int __init pv_time_init(void);
 int __init pv_spinlock_init(void);
diff --git a/arch/loongarch/kernel/paravirt.c b/arch/loongarch/kernel/paravirt.c
index 8caaa94fed1a..c5e526098c0b 100644
--- a/arch/loongarch/kernel/paravirt.c
+++ b/arch/loongarch/kernel/paravirt.c
@@ -13,13 +13,6 @@ static int has_steal_clock;
 static DEFINE_PER_CPU(struct kvm_steal_time, steal_time) __aligned(64);
 DEFINE_STATIC_KEY_FALSE(virt_spin_lock_key);
 
-static u64 native_steal_clock(int cpu)
-{
-	return 0;
-}
-
-DEFINE_STATIC_CALL(pv_steal_clock, native_steal_clock);
-
 static bool steal_acc = true;
 
 static int __init parse_no_stealacc(char *arg)
-- 
2.51.0