linux-kernel - Re: [PATCH v4 7/7] ACPI / x86: introduce acpi_os

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 14 Dec 2015 15:28:19 -0800
From:	Andy Lutomirski <luto@...capital.net>
To:	Lv Zheng <lv.zheng@...el.com>
Cc:	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Len Brown <len.brown@...el.com>,
	Andy Lutomirski <luto@...nel.org>,
	Lv Zheng <zetalog@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linux ACPI <linux-acpi@...r.kernel.org>,
	Chen Yu <yu.c.chen@...el.com>
Subject: Re: [PATCH v4 7/7] ACPI / x86: introduce acpi_os_readable() support

On Wed, Dec 2, 2015 at 6:43 PM, Lv Zheng <lv.zheng@...el.com> wrote:
> From: Chen Yu <yu.c.chen@...el.com>
>
> This patch implements acpi_os_readable(). The function is used by ACPICA
> AML debugger to validate user specified pointers for dumping the memory as
> ACPICA descriptor objects.
>
> Signed-off-by: Chen Yu <yu.c.chen@...el.com>
> Tested-by: Lv Zheng <lv.zheng@...el.com>
> Signed-off-by: Lv Zheng <lv.zheng@...el.com>
> ---
>  arch/x86/Kconfig                  |    1 +
>  arch/x86/include/asm/acenv.h      |    1 +
>  arch/x86/kernel/acpi/boot.c       |   44 +++++++++++++++++++++++++++++++++++++
>  drivers/acpi/Kconfig              |    3 +++
>  drivers/acpi/osl.c                |   12 ++++++++++
>  include/acpi/platform/aclinux.h   |    1 -
>  include/acpi/platform/aclinuxex.h |    5 -----
>  7 files changed, 61 insertions(+), 6 deletions(-)
>
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index db3622f..6593b6a 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -19,6 +19,7 @@ config X86
>         def_bool y
>         select ACPI_LEGACY_TABLES_LOOKUP        if ACPI
>         select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI
> +       select ACPI_MEMORY_ACCESS_CHECK_SUPPORT if ACPI
>         select ANON_INODES
>         select ARCH_CLOCKSOURCE_DATA
>         select ARCH_DISCARD_MEMBLOCK
> diff --git a/arch/x86/include/asm/acenv.h b/arch/x86/include/asm/acenv.h
> index 1b010a8..a2a2849 100644
> --- a/arch/x86/include/asm/acenv.h
> +++ b/arch/x86/include/asm/acenv.h
> @@ -20,6 +20,7 @@
>
>  int __acpi_acquire_global_lock(unsigned int *lock);
>  int __acpi_release_global_lock(unsigned int *lock);
> +bool __acpi_memory_readable(void *pointer, size_t length);
>
>  #define ACPI_ACQUIRE_GLOBAL_LOCK(facs, Acq) \
>         ((Acq) = __acpi_acquire_global_lock(&facs->global_lock))
> diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
> index e759076..4a5e22e 100644
> --- a/arch/x86/kernel/acpi/boot.c
> +++ b/arch/x86/kernel/acpi/boot.c
> @@ -1699,6 +1699,50 @@ int __acpi_release_global_lock(unsigned int *lock)
>         return old & 0x1;
>  }
>
> +bool __acpi_memory_readable(void *pointer, size_t length)
> +{
> +       unsigned long obj_start, obj_end;
> +       unsigned long start_pfn, end_pfn;

What does "readable" mean in this context?

--Andy
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/