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Re: [PATCH v3 2/9] xen/asm-generic: Introduce generic acpi.h
- To: Shawn Anastasio <sanastasio@xxxxxxxxxxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 25 Mar 2024 16:19:33 +0100
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- Cc: tpearson@xxxxxxxxxxxxxxxxxxxxx, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Mon, 25 Mar 2024 15:19:43 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 14.03.2024 23:15, Shawn Anastasio wrote:
> Introduce a generic acpi.h header that provides the required definitions
> to allow files including xen/acpi.h to be compiled. The definitions were
> largely derived from the !CONFIG_ACPI parts of ARM's acpi.h.
As said a couple of times in discussion with Oleksii on his work towards
populating asm-generic/, I view a use like this as an abuse of this
asm-generic machinery. Instead imo said !CONFIG_ACPI parts from Arm's header
want moving to xen/acpi.h, eliminating the need for asm/acpi.h for
architectures / configurations not supporting ACPI. Much like was done
with e.g. xen/numa.h.
Jan
> --- a/xen/arch/ppc/include/asm/Makefile
> +++ b/xen/arch/ppc/include/asm/Makefile
> @@ -1,4 +1,5 @@
> # SPDX-License-Identifier: GPL-2.0-only
> +generic-y += acpi.h
> generic-y += altp2m.h
> generic-y += device.h
> generic-y += div64.h
> --- /dev/null
> +++ b/xen/include/asm-generic/acpi.h
> @@ -0,0 +1,20 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +#ifndef __ASM_GENERIC_ACPI_H
> +#define __ASM_GENERIC_ACPI_H
> +
> +#include <asm/page.h>
> +#include <xen/types.h>
> +
> +#ifdef CONFIG_ACPI
> +#error "asm-generic acpi.h can't be used with CONFIG_ACPI set"
> +#endif
> +
> +#define COMPILER_DEPENDENT_INT64 int64_t
> +#define COMPILER_DEPENDENT_UINT64 uint64_t
> +#define ACPI_MAP_MEM_ATTR PAGE_HYPERVISOR
> +
> +#define acpi_disabled (true)
> +#define disable_acpi()
> +#define enable_acpi()
> +
> +#endif /* __ASM_GENERIC_ACPI_H */
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