linux-kernel - [RFC PATCH v3 1/5] firmware/psci: Add definitions for PSCI v1.3 specification (ALPHA)

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Date: Tue, 19 Mar 2024 12:59:02 +0000
From: David Woodhouse <dwmw2@...radead.org>
To: linux-arm-kernel@...ts.infradead.org,
	kvm@...r.kernel.org
Cc: Paolo Bonzini <pbonzini@...hat.com>,
	Jonathan Corbet <corbet@....net>,
	Marc Zyngier <maz@...nel.org>,
	Oliver Upton <oliver.upton@...ux.dev>,
	James Morse <james.morse@....com>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Zenghui Yu <yuzenghui@...wei.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Len Brown <len.brown@...el.com>,
	Pavel Machek <pavel@....cz>,
	David Woodhouse <dwmw@...zon.co.uk>,
	Mostafa Saleh <smostafa@...gle.com>,
	Jean-Philippe Brucker <jean-philippe@...aro.org>,
	linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	kvmarm@...ts.linux.dev,
	linux-pm@...r.kernel.org
Subject: [RFC PATCH v3 1/5] firmware/psci: Add definitions for PSCI v1.3 specification (ALPHA)

From: David Woodhouse <dwmw@...zon.co.uk>

The v1.3 PSCI spec (https://developer.arm.com/documentation/den0022) adds
SYSTEM_OFF2, CLEAN_INV_MEMREGION and CLEAN_INV_MEMREGION_ATTRIBUTES
functions. Add definitions for them and their parameters, along with the
new TIMEOUT, RATE_LIMITED and BUSY error values.

Signed-off-by: David Woodhouse <dwmw@...zon.co.uk>
---
 include/uapi/linux/psci.h | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/include/uapi/linux/psci.h b/include/uapi/linux/psci.h
index 42a40ad3fb62..082ed689fdaf 100644
--- a/include/uapi/linux/psci.h
+++ b/include/uapi/linux/psci.h
@@ -59,6 +59,8 @@
 #define PSCI_1_1_FN_SYSTEM_RESET2		PSCI_0_2_FN(18)
 #define PSCI_1_1_FN_MEM_PROTECT			PSCI_0_2_FN(19)
 #define PSCI_1_1_FN_MEM_PROTECT_CHECK_RANGE	PSCI_0_2_FN(20)
+#define PSCI_1_3_FN_SYSTEM_OFF2			PSCI_0_2_FN(21)
+#define PSCI_1_3_FN_CLEAN_INV_MEMREGION_ATTRIBUTES PSCI_0_2_FN(23)
 
 #define PSCI_1_0_FN64_CPU_DEFAULT_SUSPEND	PSCI_0_2_FN64(12)
 #define PSCI_1_0_FN64_NODE_HW_STATE		PSCI_0_2_FN64(13)
@@ -68,6 +70,8 @@
 
 #define PSCI_1_1_FN64_SYSTEM_RESET2		PSCI_0_2_FN64(18)
 #define PSCI_1_1_FN64_MEM_PROTECT_CHECK_RANGE	PSCI_0_2_FN64(20)
+#define PSCI_1_3_FN64_SYSTEM_OFF2		PSCI_0_2_FN64(21)
+#define PSCI_1_3_FN64_CLEAN_INV_MEMREGION	PSCI_0_2_FN64(22)
 
 /* PSCI v0.2 power state encoding for CPU_SUSPEND function */
 #define PSCI_0_2_POWER_STATE_ID_MASK		0xffff
@@ -100,6 +104,19 @@
 #define PSCI_1_1_RESET_TYPE_SYSTEM_WARM_RESET	0
 #define PSCI_1_1_RESET_TYPE_VENDOR_START	0x80000000U
 
+/* PSCI v1.3 hibernate type for SYSTEM_OFF2 */
+#define PSCI_1_3_HIBERNATE_TYPE_OFF		0
+
+/* PSCI v1.3 flags for CLEAN_INV_MEMREGION */
+#define PSCI_1_3_CLEAN_INV_MEMREGION_FLAG_DRY_RUN	BIT(0)
+
+/* PSCI v1.3 attributes for CLEAN_INV_MEMREGION_ATTRIBUTES */
+#define PSCI_1_3_CLEAN_INV_MEMREGION_ATTR_OP_TYPE	0
+#define PSCI_1_3_CLEAN_INV_MEMREGION_ATTR_CPU_RDVZ	1
+#define PSCI_1_3_CLEAN_INV_MEMREGION_ATTR_LATENCY	2
+#define PSCI_1_3_CLEAN_INV_MEMREGION_ATTR_RATE_LIMIT	3
+#define PSCI_1_3_CLEAN_INV_MEMREGION_ATTR_TIMEOUT	4
+
 /* PSCI version decoding (independent of PSCI version) */
 #define PSCI_VERSION_MAJOR_SHIFT		16
 #define PSCI_VERSION_MINOR_MASK			\
@@ -133,5 +150,8 @@
 #define PSCI_RET_NOT_PRESENT			-7
 #define PSCI_RET_DISABLED			-8
 #define PSCI_RET_INVALID_ADDRESS		-9
+#define PSCI_RET_TIMEOUT			-10
+#define PSCI_RET_RATE_LIMITED			-11
+#define PSCI_RET_BUSY				-12
 
 #endif /* _UAPI_LINUX_PSCI_H */
-- 
2.44.0