[PATCH v3] hw/arm: Restrict APEI tables generation to the 'virt' machine

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

While APEI is a generic ACPI feature (usable by X86 and ARM64), only
the 'virt' machine uses it, by enabling the RAS Virtualization. See
commit 2afa8c8519: "hw/arm/virt: Introduce a RAS machine option").

Restrict the APEI tables generation code to the single user: the virt
machine. If another machine wants to use it, it simply has to 'select
ACPI_APEI' in its Kconfig.

Fixes: aa16508f1d ("ACPI: Build related register address fields via hardware error fw_cfg blob")
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Dongjiu Geng <gengdongjiu@huawei.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
v3: Rebased
v2: Reworded

Cc: Xiang Zheng <zhengxiang9@huawei.com>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 default-configs/devices/arm-softmmu.mak | 1 -
 hw/arm/Kconfig                          | 1 +
 2 files changed, 1 insertion(+), 1 deletion(-)

diff --git a/default-configs/devices/arm-softmmu.mak b/default-configs/devices/arm-softmmu.mak
index 9a94ebd0be..08a32123b4 100644
--- a/default-configs/devices/arm-softmmu.mak
+++ b/default-configs/devices/arm-softmmu.mak
@@ -43,4 +43,3 @@ CONFIG_FSL_IMX7=y
 CONFIG_FSL_IMX6UL=y
 CONFIG_SEMIHOSTING=y
 CONFIG_ALLWINNER_H3=y
-CONFIG_ACPI_APEI=y
diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
index f303c6bead..7d040827af 100644
--- a/hw/arm/Kconfig
+++ b/hw/arm/Kconfig
@@ -26,6 +26,7 @@ config ARM_VIRT
     select ACPI_MEMORY_HOTPLUG
     select ACPI_HW_REDUCED
     select ACPI_NVDIMM
+    select ACPI_APEI
 
 config CHEETAH
     bool
-- 
2.26.2