linux-kernel - [PATCH 06/32] ACPICA: Add support for ASPT table in disassembler

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Message-ID: <1953193.PYKUYFuaPT@kreacher>
Date:   Wed, 05 Apr 2023 15:36:51 +0200
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Linux ACPI <linux-acpi@...r.kernel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Bob Moore <robert.moore@...el.com>
Subject: [PATCH 06/32] ACPICA: Add support for ASPT table in disassembler

From: Jeremi Piotrowski <jpiotrowski@...ux.microsoft.com>

ACPICA commit 6771f8b758299bd383bab145d5fd36ec229b2d70

ASPT is the AMD Secure Processor table, found in Hyper-V VMs when SNP
isolation is exposed to the VM and in some high-end AMD servers. This
commit adds support for rev 1 of the ASPT spec in the disassembler.

Link: https://github.com/acpica/acpica/commit/6771f8b7
Signed-off-by: Bob Moore <robert.moore@...el.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
 include/acpi/actbl1.h | 46 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/include/acpi/actbl1.h b/include/acpi/actbl1.h
index 81b9e794424d..b5e011da5271 100644
--- a/include/acpi/actbl1.h
+++ b/include/acpi/actbl1.h
@@ -26,6 +26,7 @@
  */
 #define ACPI_SIG_AEST           "AEST"	/* Arm Error Source Table */
 #define ACPI_SIG_ASF            "ASF!"	/* Alert Standard Format table */
+#define ACPI_SIG_ASPT           "ASPT"	/* AMD Secure Processor Table */
 #define ACPI_SIG_BERT           "BERT"	/* Boot Error Record Table */
 #define ACPI_SIG_BGRT           "BGRT"	/* Boot Graphics Resource Table */
 #define ACPI_SIG_BOOT           "BOOT"	/* Simple Boot Flag Table */
@@ -109,6 +110,51 @@ struct acpi_whea_header {
 	u64 mask;		/* Bitmask required for this register instruction */
 };
 
+/* https://docs.microsoft.com/en-us/windows-hardware/drivers/ddi/acpitabl/ns-acpitabl-aspt_table */
+#define ASPT_REVISION_ID 0x01
+struct acpi_table_aspt {
+	struct acpi_table_header header;
+	u32 num_entries;
+};
+
+struct acpi_aspt_header {
+	u16 type;
+	u16 length;
+};
+
+enum acpi_aspt_type {
+	ACPI_ASPT_TYPE_GLOBAL_REGS = 0,
+	ACPI_ASPT_TYPE_SEV_MBOX_REGS = 1,
+	ACPI_ASPT_TYPE_ACPI_MBOX_REGS = 2,
+};
+
+/* 0: ASPT Global Registers */
+struct acpi_aspt_global_regs {
+	struct acpi_aspt_header header;
+	u32 reserved;
+	u64 feature_reg_addr;
+	u64 irq_en_reg_addr;
+	u64 irq_st_reg_addr;
+};
+
+/* 1: ASPT SEV Mailbox Registers */
+struct acpi_aspt_sev_mbox_regs {
+	struct acpi_aspt_header header;
+	u8 mbox_irq_id;
+	u8 reserved[3];
+	u64 cmd_resp_reg_addr;
+	u64 cmd_buf_lo_reg_addr;
+	u64 cmd_buf_hi_reg_addr;
+};
+
+/* 2: ASPT ACPI Mailbox Registers */
+struct acpi_aspt_acpi_mbox_regs {
+	struct acpi_aspt_header header;
+	u32 reserved1;
+	u64 cmd_resp_reg_addr;
+	u64 reserved2[2];
+};
+
 /*******************************************************************************
  *
  * ASF - Alert Standard Format table (Signature "ASF!")
-- 
2.35.3