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Date: Mon, 28 Apr 2014 03:02:12 +0000
From: "Zheng, Lv" <lv.zheng@...el.com>
To: "Rafael J. Wysocki" <rjw@...ysocki.net>
CC: "Wysocki, Rafael J" <rafael.j.wysocki@...el.com>,
"Brown, Len" <len.brown@...el.com>, Lv Zheng <zetalog@...il.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
"Luck, Tony" <tony.luck@...el.com>,
"Yu, Fenghua" <fenghua.yu@...el.com>,
"linux-ia64@...r.kernel.org" <linux-ia64@...r.kernel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
"H. Peter Anvin" <hpa@...or.com>, "x86@...nel.org" <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>.
Hi, Rafael
> From: linux-acpi-owner@...r.kernel.org [mailto:linux-acpi-owner@...r.kernel.org] On Behalf Of Rafael J. Wysocki
> Sent: Monday, April 28, 2014 5:37 AM
> To: Zheng, Lv
>
> 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.
This patch doesn't provide a rename.
Currently, <asm/acpi.h> includes:
1. arch specific ACPI stuff
2. arch specific ACPICA stuff
This patch moves "2" to a separate file <asm/acenv.h>, thus no renaming happens here.
Thanks and best regards
-Lv
>
> > 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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