52 lines
1.9 KiB
Diff
52 lines
1.9 KiB
Diff
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From 37aab238363c8242aa76853396c4f272b5508bca Mon Sep 17 00:00:00 2001
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From: Salil Mehta <salil.mehta@huawei.com>
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Date: Mon, 8 Jun 2020 15:25:35 +0100
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Subject: [PATCH] arm/acpi: Enable ACPI support for vcpu hotplug
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ACPI is required to interface QEMU with the guest. Roughly falls into below
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cases,
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1. Convey the possible vcpus config at the machine init time to the guest
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using various DSDT tables like MADT etc.
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2. Convey vcpu hotplug events to guest(using GED)
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3. Assist in evaluation of various ACPI methods(like _EVT, _STA, _OST, _EJ0,
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_MAT etc.)
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4. Provides ACPI cpu hotplug state and 12 Byte memory mapped cpu hotplug
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control register interface to the OSPM/guest corresponding to each possible
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vcpu. The register interface consists of various R/W fields and their
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handling operations. These are called when ever register fields or memory
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regions are accessed(i.e. read or written) by OSPM when ever it evaluates
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various ACPI methods.
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Note: lot of this framework code is inherited from the changes already done for
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x86 but still some minor changes are required to make it compatible with
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ARM64.)
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This patch enables the ACPI support for virtual cpu hotplug. ACPI changes
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required will follow in subsequent patches.
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Co-developed-by: Salil Mehta <salil.mehta@huawei.com>
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Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
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Co-developed-by: Keqian Zhu <zhukeqian1@huawei.com>
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Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
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Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
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---
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hw/arm/Kconfig | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
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index 3ada335a24..c0a7d0bd58 100644
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--- a/hw/arm/Kconfig
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+++ b/hw/arm/Kconfig
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@@ -29,6 +29,7 @@ config ARM_VIRT
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select ACPI_HW_REDUCED
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select ACPI_APEI
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select ACPI_VIOT
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+ select ACPI_CPU_HOTPLUG
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select VIRTIO_MEM_SUPPORTED
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select ACPI_CXL
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select ACPI_HMAT
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--
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2.27.0
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