linux-kernel - [RFC PATCH v2 27/35] ACPICA: Add new MADT GICC flags fields [code first?]

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Message-Id: <20230913163823.7880-28-james.morse@arm.com>
Date:   Wed, 13 Sep 2023 16:38:15 +0000
From:   James Morse <james.morse@....com>
To:     linux-pm@...r.kernel.org, loongarch@...ts.linux.dev,
        linux-acpi@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-riscv@...ts.infradead.org, kvmarm@...ts.linux.dev
Cc:     x86@...nel.org, Salil Mehta <salil.mehta@...wei.com>,
        Russell King <linux@...linux.org.uk>,
        Jean-Philippe Brucker <jean-philippe@...aro.org>,
        jianyong.wu@....com, justin.he@....com
Subject: [RFC PATCH v2 27/35] ACPICA: Add new MADT GICC flags fields [code first?]

Add the new flag field to the MADT's GICC structure.

'Online Capable' indicates a disabled CPU can be enabled later.

Signed-off-by: James Morse <james.morse@....com>
---
This patch probably needs to go via the upstream acpica project,
but is included here so the feature can be testd.
---
 include/acpi/actbl2.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
index 3751ae69432f..c433a079d8e1 100644
--- a/include/acpi/actbl2.h
+++ b/include/acpi/actbl2.h
@@ -1046,6 +1046,7 @@ struct acpi_madt_generic_interrupt {
 /* ACPI_MADT_ENABLED                    (1)      Processor is usable if set */
 #define ACPI_MADT_PERFORMANCE_IRQ_MODE  (1<<1)	/* 01: Performance Interrupt Mode */
 #define ACPI_MADT_VGIC_IRQ_MODE         (1<<2)	/* 02: VGIC Maintenance Interrupt mode */
+#define ACPI_MADT_GICC_CPU_CAPABLE      (1<<3)	/* 03: CPU is online capable */
 
 /* 12: Generic Distributor (ACPI 5.0 + ACPI 6.0 changes) */
 
-- 
2.39.2