[RFC PATCH 02/26] psci: Export configured PSCI function IDs

From: David Brazdil <dbrazdil@google.com>
To: kvmarm@lists.cs.columbia.edu
Cc: Mark Rutland <mark.rutland@arm.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	kernel-team@android.com,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Marc Zyngier <maz@kernel.org>,
	Quentin Perret <qperret@google.com>,
	linux-kernel@vger.kernel.org, James Morse <james.morse@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	Catalin Marinas <catalin.marinas@arm.com>,
	Tejun Heo <tj@kernel.org>, Dennis Zhou <dennis@kernel.org>,
	Christoph Lameter <cl@linux.com>,
	David Brazdil <dbrazdil@google.com>,
	Will Deacon <will@kernel.org>,
	Julien Thierry <julien.thierry.kdev@gmail.com>,
	Andrew Scull <ascull@google.com>
Subject: [RFC PATCH 02/26] psci: Export configured PSCI function IDs
Date: Wed,  4 Nov 2020 18:36:06 +0000	[thread overview]
Message-ID: <20201104183630.27513-3-dbrazdil@google.com> (raw)
In-Reply-To: <20201104183630.27513-1-dbrazdil@google.com>

Function IDs used by PSCI are configurable for v0.1 via DT/APCI. If the
host is using PSCI v0.1, KVM's PSCI proxy needs to use the same IDs.
Expose the array holding the information.

Signed-off-by: David Brazdil <dbrazdil@google.com>
---
 drivers/firmware/psci/psci.c | 10 +---------
 include/linux/psci.h         | 10 ++++++++++
 2 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c
index ff523bdbfe3f..ffcb88f60e21 100644
--- a/drivers/firmware/psci/psci.c
+++ b/drivers/firmware/psci/psci.c
@@ -60,15 +60,7 @@ typedef unsigned long (psci_fn)(unsigned long, unsigned long,
 				unsigned long, unsigned long);
 static psci_fn *invoke_psci_fn;
 
-enum psci_function {
-	PSCI_FN_CPU_SUSPEND,
-	PSCI_FN_CPU_ON,
-	PSCI_FN_CPU_OFF,
-	PSCI_FN_MIGRATE,
-	PSCI_FN_MAX,
-};
-
-static u32 psci_function_id[PSCI_FN_MAX];
+u32 psci_function_id[PSCI_FN_MAX];
 
 #define PSCI_0_2_POWER_STATE_MASK		\
 				(PSCI_0_2_POWER_STATE_ID_MASK | \
diff --git a/include/linux/psci.h b/include/linux/psci.h
index cb35b90d1746..877d844ee6d9 100644
--- a/include/linux/psci.h
+++ b/include/linux/psci.h
@@ -29,6 +29,16 @@ bool psci_has_osi_support(void);
  */
 extern int psci_driver_version;
 
+enum psci_function {
+	PSCI_FN_CPU_SUSPEND,
+	PSCI_FN_CPU_ON,
+	PSCI_FN_CPU_OFF,
+	PSCI_FN_MIGRATE,
+	PSCI_FN_MAX,
+};
+
+extern u32 psci_function_id[PSCI_FN_MAX];
+
 struct psci_operations {
 	u32 (*get_version)(void);
 	int (*cpu_suspend)(u32 state, unsigned long entry_point);
-- 
2.29.1.341.ge80a0c044ae-goog


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