linux-kernel - [PATCH v10 03/24] RISC-V: Add defines for the SBI message proxy extension

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250818040920.272664-4-apatel@ventanamicro.com>
Date: Mon, 18 Aug 2025 09:38:59 +0530
From: Anup Patel <apatel@...tanamicro.com>
To: Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Jassi Brar <jassisinghbrar@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Rafael J . Wysocki" <rafael@...nel.org>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	Uwe Kleine-König <ukleinek@...nel.org>
Cc: Palmer Dabbelt <palmer@...belt.com>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Alexandre Ghiti <alex@...ti.fr>,
	Len Brown <lenb@...nel.org>,
	Sunil V L <sunilvl@...tanamicro.com>,
	Rahul Pathak <rpathak@...tanamicro.com>,
	Leyfoon Tan <leyfoon.tan@...rfivetech.com>,
	Atish Patra <atish.patra@...ux.dev>,
	Andrew Jones <ajones@...tanamicro.com>,
	Samuel Holland <samuel.holland@...ive.com>,
	Anup Patel <anup@...infault.org>,
	linux-clk@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-acpi@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Anup Patel <apatel@...tanamicro.com>,
	Atish Patra <atishp@...osinc.com>
Subject: [PATCH v10 03/24] RISC-V: Add defines for the SBI message proxy extension

Add defines for the new SBI message proxy extension which is part
of the SBI v3.0 specification.

Reviewed-by: Atish Patra <atishp@...osinc.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Co-developed-by: Rahul Pathak <rpathak@...tanamicro.com>
Signed-off-by: Rahul Pathak <rpathak@...tanamicro.com>
Signed-off-by: Anup Patel <apatel@...tanamicro.com>
---
 arch/riscv/include/asm/sbi.h | 62 ++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)

diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
index 341e74238aa0..c19e5c7383a6 100644
--- a/arch/riscv/include/asm/sbi.h
+++ b/arch/riscv/include/asm/sbi.h
@@ -36,6 +36,7 @@ enum sbi_ext_id {
 	SBI_EXT_STA = 0x535441,
 	SBI_EXT_NACL = 0x4E41434C,
 	SBI_EXT_FWFT = 0x46574654,
+	SBI_EXT_MPXY = 0x4D505859,
 
 	/* Experimentals extensions must lie within this range */
 	SBI_EXT_EXPERIMENTAL_START = 0x08000000,
@@ -430,6 +431,67 @@ enum sbi_fwft_feature_t {
 
 #define SBI_FWFT_SET_FLAG_LOCK			BIT(0)
 
+enum sbi_ext_mpxy_fid {
+	SBI_EXT_MPXY_GET_SHMEM_SIZE,
+	SBI_EXT_MPXY_SET_SHMEM,
+	SBI_EXT_MPXY_GET_CHANNEL_IDS,
+	SBI_EXT_MPXY_READ_ATTRS,
+	SBI_EXT_MPXY_WRITE_ATTRS,
+	SBI_EXT_MPXY_SEND_MSG_WITH_RESP,
+	SBI_EXT_MPXY_SEND_MSG_WITHOUT_RESP,
+	SBI_EXT_MPXY_GET_NOTIFICATION_EVENTS,
+};
+
+enum sbi_mpxy_attribute_id {
+	/* Standard channel attributes managed by MPXY framework */
+	SBI_MPXY_ATTR_MSG_PROT_ID		= 0x00000000,
+	SBI_MPXY_ATTR_MSG_PROT_VER		= 0x00000001,
+	SBI_MPXY_ATTR_MSG_MAX_LEN		= 0x00000002,
+	SBI_MPXY_ATTR_MSG_SEND_TIMEOUT		= 0x00000003,
+	SBI_MPXY_ATTR_MSG_COMPLETION_TIMEOUT	= 0x00000004,
+	SBI_MPXY_ATTR_CHANNEL_CAPABILITY	= 0x00000005,
+	SBI_MPXY_ATTR_SSE_EVENT_ID		= 0x00000006,
+	SBI_MPXY_ATTR_MSI_CONTROL		= 0x00000007,
+	SBI_MPXY_ATTR_MSI_ADDR_LO		= 0x00000008,
+	SBI_MPXY_ATTR_MSI_ADDR_HI		= 0x00000009,
+	SBI_MPXY_ATTR_MSI_DATA			= 0x0000000A,
+	SBI_MPXY_ATTR_EVENTS_STATE_CONTROL	= 0x0000000B,
+	SBI_MPXY_ATTR_STD_ATTR_MAX_IDX,
+	/*
+	 * Message protocol specific attributes, managed by
+	 * the message protocol specification.
+	 */
+	SBI_MPXY_ATTR_MSGPROTO_ATTR_START	= 0x80000000,
+	SBI_MPXY_ATTR_MSGPROTO_ATTR_END		= 0xffffffff
+};
+
+/* Possible values of MSG_PROT_ID attribute as-per SBI v3.0 (or higher) */
+enum sbi_mpxy_msgproto_id {
+	SBI_MPXY_MSGPROTO_RPMI_ID = 0x0,
+};
+
+/* RPMI message protocol specific MPXY attributes */
+enum sbi_mpxy_rpmi_attribute_id {
+	SBI_MPXY_RPMI_ATTR_SERVICEGROUP_ID = SBI_MPXY_ATTR_MSGPROTO_ATTR_START,
+	SBI_MPXY_RPMI_ATTR_SERVICEGROUP_VERSION,
+	SBI_MPXY_RPMI_ATTR_IMPL_ID,
+	SBI_MPXY_RPMI_ATTR_IMPL_VERSION,
+	SBI_MPXY_RPMI_ATTR_MAX_ID
+};
+
+/* Encoding of MSG_PROT_VER attribute */
+#define SBI_MPXY_MSG_PROT_VER_MAJOR(__ver)	upper_16_bits(__ver)
+#define SBI_MPXY_MSG_PROT_VER_MINOR(__ver)	lower_16_bits(__ver)
+#define SBI_MPXY_MSG_PROT_MKVER(__maj, __min)	(((u32)(__maj) << 16) | (u16)(__min))
+
+/* Capabilities available through CHANNEL_CAPABILITY attribute */
+#define SBI_MPXY_CHAN_CAP_MSI			BIT(0)
+#define SBI_MPXY_CHAN_CAP_SSE			BIT(1)
+#define SBI_MPXY_CHAN_CAP_EVENTS_STATE		BIT(2)
+#define SBI_MPXY_CHAN_CAP_SEND_WITH_RESP	BIT(3)
+#define SBI_MPXY_CHAN_CAP_SEND_WITHOUT_RESP	BIT(4)
+#define SBI_MPXY_CHAN_CAP_GET_NOTIFICATIONS	BIT(5)
+
 /* SBI spec version fields */
 #define SBI_SPEC_VERSION_DEFAULT	0x1
 #define SBI_SPEC_VERSION_MAJOR_SHIFT	24
-- 
2.43.0