linux-kernel - [RFC PATCH v3 1/6] psci: Export psci_ops.conduit symbol as modules will use it.

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Message-Id: <20190918080716.64242-2-jianyong.wu@arm.com>
Date:   Wed, 18 Sep 2019 04:07:11 -0400
From:   Jianyong Wu <jianyong.wu@....com>
To:     netdev@...r.kernel.org, yangbo.lu@....com, john.stultz@...aro.org,
        tglx@...utronix.de, pbonzini@...hat.com,
        sean.j.christopherson@...el.com, maz@...nel.org,
        richardcochran@...il.com, Mark.Rutland@....com,
        Will.Deacon@....com, suzuki.poulose@....com
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Steve.Capper@....com, Kaly.Xin@....com, justin.he@....com,
        jianyong.wu@....com, nd@....com,
        linux-arm-kernel@...ts.infradead.org
Subject: [RFC PATCH v3 1/6] psci: Export psci_ops.conduit symbol as modules will use it.

If arm_smccc_1_1_invoke used in modules, psci_ops.conduit should
be export.

Signed-off-by: Jianyong Wu <jianyong.wu@....com>
---
 drivers/firmware/psci/psci.c | 6 ++++++
 include/linux/arm-smccc.h    | 2 +-
 include/linux/psci.h         | 1 +
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c
index f82ccd39a913..35c4eaab1451 100644
--- a/drivers/firmware/psci/psci.c
+++ b/drivers/firmware/psci/psci.c
@@ -212,6 +212,12 @@ static unsigned long psci_migrate_info_up_cpu(void)
 			      0, 0, 0);
 }
 
+enum psci_conduit psci_get_conduit(void)
+{
+	return psci_ops.conduit;
+}
+EXPORT_SYMBOL(psci_get_conduit);
+
 static void set_conduit(enum psci_conduit conduit)
 {
 	switch (conduit) {
diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h
index 552cbd49abe8..a6e4d3e3d10a 100644
--- a/include/linux/arm-smccc.h
+++ b/include/linux/arm-smccc.h
@@ -357,7 +357,7 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1,
  * The return value also provides the conduit that was used.
  */
 #define arm_smccc_1_1_invoke(...) ({					\
-		int method = psci_ops.conduit;				\
+		int method = psci_get_conduit();			\
 		switch (method) {					\
 		case PSCI_CONDUIT_HVC:					\
 			arm_smccc_1_1_hvc(__VA_ARGS__);			\
diff --git a/include/linux/psci.h b/include/linux/psci.h
index a8a15613c157..e5cedc986049 100644
--- a/include/linux/psci.h
+++ b/include/linux/psci.h
@@ -42,6 +42,7 @@ struct psci_operations {
 	enum smccc_version smccc_version;
 };
 
+extern enum psci_conduit psci_get_conduit(void);
 extern struct psci_operations psci_ops;
 
 #if defined(CONFIG_ARM_PSCI_FW)
-- 
2.17.1