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Date: Sun, 27 Apr 2014 23:36:48 +0200
From: "Rafael J. Wysocki" <rjw@...ysocki.net>
To: Lv Zheng <lv.zheng@...el.com>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
Len Brown <len.brown@...el.com>, Lv Zheng <zetalog@...il.com>,
linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
Tony Luck <tony.luck@...el.com>,
Fenghua Yu <fenghua.yu@...el.com>, linux-ia64@...r.kernel.org,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org
Subject: Re: [PATCH v2 3/5] ACPICA: Add <asm/acenv.h> to remove mis-ordered inclusion of <asm/acpi.h> from <acpi/platform/aclinux.h>.
On Wednesday, April 23, 2014 02:54:06 PM Lv Zheng wrote:
> There is a mis-order inclusion for <asm/acpi.h>.
>
> As we will enforce including <linux/acpi.h> for all Linux ACPI users, we
> can find the inclusion order is as follows:
>
> <linux/acpi.h>
> <acpi/acpi.h>
> <acpi/platform/acenv.h>
> (acenv.h before including aclinux.h)
> <acpi/platform/aclinux.h>
> ...........................................................................
> (aclinux.h before including asm/acpi.h)
> <asm/acpi.h> @Redundant@
> (ACPICA specific stuff)
> ...........................................................................
> ...........................................................................
> (Linux ACPI specific stuff) ? - - - - - - - - - - - - +
> (aclinux.h after including asm/acpi.h) @Invisible@ |
> (acenv.h after including aclinux.h) @Invisible@ |
> other ACPICA headers @Invisible@ |
> ............................................................|..............
> <acpi/acpi_bus.h> |
> <acpi/acpi_drivers.h> |
> <asm/acpi.h> (Excluded) |
> (Linux ACPI specific stuff) ! <- - - - - - - - - - - - - +
>
> NOTE that, in ACPICA, <acpi/platform/acenv.h> is more like Kconfig
> generated <generated/autoconf.h> for Linux, it is meant to be included
> before including any ACPICA code.
>
> In the above figure, there is a question mark for "Linux ACPI specific
> stuff" in <asm/acpi.h> which should be included after including all other
> ACPICA header files. Thus they really need to be moved to the position
> marked with exclaimation mark or the definitions in the blocks marked with
> "@Invisible@" will be invisible to such architecture specific "Linux ACPI
> specific stuff" header blocks. This leaves 2 issues:
> 1. All environmental definitions in these blocks should have a copy in the
> area marked with "@Redundant@" if they are required by the "Linux ACPI
> specific stuff".
> 2. We cannot use any ACPICA defined types in <asm/acpi.h>.
>
> This patch splits architecture specific ACPICA stuff from <asm/acpi.h> to
> fix this issue.
>
> Signed-off-by: Lv Zheng <lv.zheng@...el.com>
> Cc: Tony Luck <tony.luck@...el.com>
> Cc: Fenghua Yu <fenghua.yu@...el.com>
> Cc: linux-ia64@...r.kernel.org
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: "H. Peter Anvin" <hpa@...or.com>
> Cc: x86@...nel.org
> ---
> arch/ia64/include/asm/acenv.h | 71 +++++++++++++++++++++++++++++++++++++++
> arch/ia64/include/asm/acpi.h | 50 ---------------------------
> arch/x86/include/asm/acenv.h | 65 +++++++++++++++++++++++++++++++++++
> arch/x86/include/asm/acpi.h | 45 -------------------------
> include/acpi/platform/aclinux.h | 2 +-
Please rename the files first (in a separate patch) and then modify the
renamed ones. That will make changes much easier to follow.
> 5 files changed, 137 insertions(+), 96 deletions(-)
> create mode 100644 arch/ia64/include/asm/acenv.h
> create mode 100644 arch/x86/include/asm/acenv.h
>
> diff --git a/arch/ia64/include/asm/acenv.h b/arch/ia64/include/asm/acenv.h
> new file mode 100644
> index 0000000..e0896eb
> --- /dev/null
> +++ b/arch/ia64/include/asm/acenv.h
> @@ -0,0 +1,71 @@
> +/*
> + * IA64 specific ACPICA environments and implementation
> + *
> + * Copyright (C) 2014, Intel Corporation
> + * Author: Lv Zheng <lv.zheng@...el.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +#ifndef _ASM_IA64_ACENV_H
> +#define _ASM_IA64_ACENV_H
> +
> +#include <asm/intrinsics.h>
> +
> +#define COMPILER_DEPENDENT_INT64 long
> +#define COMPILER_DEPENDENT_UINT64 unsigned long
> +
> +/*
> + * Calling conventions:
> + *
> + * ACPI_SYSTEM_XFACE - Interfaces to host OS (handlers, threads)
> + * ACPI_EXTERNAL_XFACE - External ACPI interfaces
> + * ACPI_INTERNAL_XFACE - Internal ACPI interfaces
> + * ACPI_INTERNAL_VAR_XFACE - Internal variable-parameter list interfaces
> + */
> +#define ACPI_SYSTEM_XFACE
> +#define ACPI_EXTERNAL_XFACE
> +#define ACPI_INTERNAL_XFACE
> +#define ACPI_INTERNAL_VAR_XFACE
> +
> +/* Asm macros */
> +
> +#define ACPI_FLUSH_CPU_CACHE()
> +
> +#ifdef CONFIG_ACPI
> +
> +static inline int
> +ia64_acpi_acquire_global_lock(unsigned int *lock)
> +{
> + unsigned int old, new, val;
> + do {
> + old = *lock;
> + new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
> + val = ia64_cmpxchg4_acq(lock, new, old);
> + } while (unlikely (val != old));
> + return (new < 3) ? -1 : 0;
> +}
> +
> +static inline int
> +ia64_acpi_release_global_lock(unsigned int *lock)
> +{
> + unsigned int old, new, val;
> + do {
> + old = *lock;
> + new = old & ~0x3;
> + val = ia64_cmpxchg4_acq(lock, new, old);
> + } while (unlikely (val != old));
> + return old & 0x1;
> +}
> +
> +#define ACPI_ACQUIRE_GLOBAL_LOCK(facs, Acq) \
> + ((Acq) = ia64_acpi_acquire_global_lock(&facs->global_lock))
> +
> +#define ACPI_RELEASE_GLOBAL_LOCK(facs, Acq) \
> + ((Acq) = ia64_acpi_release_global_lock(&facs->global_lock))
> +
> +#endif
> +
> +#endif /* _ASM_IA64_ACENV_H */
> diff --git a/arch/ia64/include/asm/acpi.h b/arch/ia64/include/asm/acpi.h
> index d651102..b0ddcfd 100644
> --- a/arch/ia64/include/asm/acpi.h
> +++ b/arch/ia64/include/asm/acpi.h
> @@ -34,56 +34,6 @@
> #include <linux/numa.h>
> #include <asm/numa.h>
>
> -#define COMPILER_DEPENDENT_INT64 long
> -#define COMPILER_DEPENDENT_UINT64 unsigned long
> -
> -/*
> - * Calling conventions:
> - *
> - * ACPI_SYSTEM_XFACE - Interfaces to host OS (handlers, threads)
> - * ACPI_EXTERNAL_XFACE - External ACPI interfaces
> - * ACPI_INTERNAL_XFACE - Internal ACPI interfaces
> - * ACPI_INTERNAL_VAR_XFACE - Internal variable-parameter list interfaces
> - */
> -#define ACPI_SYSTEM_XFACE
> -#define ACPI_EXTERNAL_XFACE
> -#define ACPI_INTERNAL_XFACE
> -#define ACPI_INTERNAL_VAR_XFACE
> -
> -/* Asm macros */
> -
> -#define ACPI_FLUSH_CPU_CACHE()
> -
> -static inline int
> -ia64_acpi_acquire_global_lock (unsigned int *lock)
> -{
> - unsigned int old, new, val;
> - do {
> - old = *lock;
> - new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
> - val = ia64_cmpxchg4_acq(lock, new, old);
> - } while (unlikely (val != old));
> - return (new < 3) ? -1 : 0;
> -}
> -
> -static inline int
> -ia64_acpi_release_global_lock (unsigned int *lock)
> -{
> - unsigned int old, new, val;
> - do {
> - old = *lock;
> - new = old & ~0x3;
> - val = ia64_cmpxchg4_acq(lock, new, old);
> - } while (unlikely (val != old));
> - return old & 0x1;
> -}
> -
> -#define ACPI_ACQUIRE_GLOBAL_LOCK(facs, Acq) \
> - ((Acq) = ia64_acpi_acquire_global_lock(&facs->global_lock))
> -
> -#define ACPI_RELEASE_GLOBAL_LOCK(facs, Acq) \
> - ((Acq) = ia64_acpi_release_global_lock(&facs->global_lock))
> -
> #ifdef CONFIG_ACPI
> #define acpi_disabled 0 /* ACPI always enabled on IA64 */
> #define acpi_noirq 0 /* ACPI always enabled on IA64 */
> diff --git a/arch/x86/include/asm/acenv.h b/arch/x86/include/asm/acenv.h
> new file mode 100644
> index 0000000..6978584
> --- /dev/null
> +++ b/arch/x86/include/asm/acenv.h
> @@ -0,0 +1,65 @@
> +/*
> + * X86 specific ACPICA environments and implementation
> + *
> + * Copyright (C) 2014, Intel Corporation
> + * Author: Lv Zheng <lv.zheng@...el.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +#ifndef _ASM_X86_ACENV_H
> +#define _ASM_X86_ACENV_H
> +
> +#include <asm/special_insns.h>
> +
> +#define COMPILER_DEPENDENT_INT64 long long
> +#define COMPILER_DEPENDENT_UINT64 unsigned long long
> +
> +/*
> + * Calling conventions:
> + *
> + * ACPI_SYSTEM_XFACE - Interfaces to host OS (handlers, threads)
> + * ACPI_EXTERNAL_XFACE - External ACPI interfaces
> + * ACPI_INTERNAL_XFACE - Internal ACPI interfaces
> + * ACPI_INTERNAL_VAR_XFACE - Internal variable-parameter list interfaces
> + */
> +#define ACPI_SYSTEM_XFACE
> +#define ACPI_EXTERNAL_XFACE
> +#define ACPI_INTERNAL_XFACE
> +#define ACPI_INTERNAL_VAR_XFACE
> +
> +/* Asm macros */
> +
> +#define ACPI_FLUSH_CPU_CACHE() wbinvd()
> +
> +#ifdef CONFIG_ACPI
> +
> +int __acpi_acquire_global_lock(unsigned int *lock);
> +int __acpi_release_global_lock(unsigned int *lock);
> +
> +#define ACPI_ACQUIRE_GLOBAL_LOCK(facs, Acq) \
> + ((Acq) = __acpi_acquire_global_lock(&facs->global_lock))
> +
> +#define ACPI_RELEASE_GLOBAL_LOCK(facs, Acq) \
> + ((Acq) = __acpi_release_global_lock(&facs->global_lock))
> +
> +/*
> + * Math helper asm macros
> + */
> +#define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \
> + asm("divl %2;" \
> + : "=a"(q32), "=d"(r32) \
> + : "r"(d32), \
> + "0"(n_lo), "1"(n_hi))
> +
> +#define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \
> + asm("shrl $1,%2 ;" \
> + "rcrl $1,%3;" \
> + : "=r"(n_hi), "=r"(n_lo) \
> + : "0"(n_hi), "1"(n_lo))
> +
> +#endif
> +
> +#endif /* _ASM_X86_ACENV_H */
> diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h
> index c8c1e70..e06225e 100644
> --- a/arch/x86/include/asm/acpi.h
> +++ b/arch/x86/include/asm/acpi.h
> @@ -32,51 +32,6 @@
> #include <asm/mpspec.h>
> #include <asm/realmode.h>
>
> -#define COMPILER_DEPENDENT_INT64 long long
> -#define COMPILER_DEPENDENT_UINT64 unsigned long long
> -
> -/*
> - * Calling conventions:
> - *
> - * ACPI_SYSTEM_XFACE - Interfaces to host OS (handlers, threads)
> - * ACPI_EXTERNAL_XFACE - External ACPI interfaces
> - * ACPI_INTERNAL_XFACE - Internal ACPI interfaces
> - * ACPI_INTERNAL_VAR_XFACE - Internal variable-parameter list interfaces
> - */
> -#define ACPI_SYSTEM_XFACE
> -#define ACPI_EXTERNAL_XFACE
> -#define ACPI_INTERNAL_XFACE
> -#define ACPI_INTERNAL_VAR_XFACE
> -
> -/* Asm macros */
> -
> -#define ACPI_FLUSH_CPU_CACHE() wbinvd()
> -
> -int __acpi_acquire_global_lock(unsigned int *lock);
> -int __acpi_release_global_lock(unsigned int *lock);
> -
> -#define ACPI_ACQUIRE_GLOBAL_LOCK(facs, Acq) \
> - ((Acq) = __acpi_acquire_global_lock(&facs->global_lock))
> -
> -#define ACPI_RELEASE_GLOBAL_LOCK(facs, Acq) \
> - ((Acq) = __acpi_release_global_lock(&facs->global_lock))
> -
> -/*
> - * Math helper asm macros
> - */
> -#define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \
> - asm("divl %2;" \
> - : "=a"(q32), "=d"(r32) \
> - : "r"(d32), \
> - "0"(n_lo), "1"(n_hi))
> -
> -
> -#define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \
> - asm("shrl $1,%2 ;" \
> - "rcrl $1,%3;" \
> - : "=r"(n_hi), "=r"(n_lo) \
> - : "0"(n_hi), "1"(n_lo))
> -
> #ifdef CONFIG_ACPI
> extern int acpi_lapic;
> extern int acpi_ioapic;
> diff --git a/include/acpi/platform/aclinux.h b/include/acpi/platform/aclinux.h
> index a20f051..99d0546 100644
> --- a/include/acpi/platform/aclinux.h
> +++ b/include/acpi/platform/aclinux.h
> @@ -71,7 +71,7 @@
> #ifdef EXPORT_ACPI_INTERFACES
> #include <linux/export.h>
> #endif
> -#include <asm/acpi.h>
> +#include <asm/acenv.h>
>
> /* Host-dependent types and defines for in-kernel ACPICA */
>
>
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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