From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Chen Yu <yu.c.chen@intel.com>
Cc: linux-acpi@vger.kernel.org,
"Rafael J. Wysocki" <rafael@kernel.org>,
Ard Biesheuvel <ardb@kernel.org>, Len Brown <lenb@kernel.org>,
Ashok Raj <ashok.raj@intel.com>,
Andy Shevchenko <andriy.shevchenko@intel.com>,
Mike Rapoport <rppt@kernel.org>, Aubrey Li <aubrey.li@intel.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v6 1/4] efi: Introduce EFI_FIRMWARE_MANAGEMENT_CAPSULE_HEADER and corresponding structures
Date: Mon, 25 Oct 2021 08:44:00 +0200 [thread overview]
Message-ID: <YXZSMCaODRPw0Zlj@kroah.com> (raw)
In-Reply-To: <1cd3161bf51de99990fd5ee2dc896b4defef4f38.1635140590.git.yu.c.chen@intel.com>
On Mon, Oct 25, 2021 at 02:25:04PM +0800, Chen Yu wrote:
> Platform Firmware Runtime Update image starts with UEFI headers, and the
> headers are defined in UEFI specification, but some of them have not been
> defined in the kernel yet.
>
> For example, the header layout of a capsule file looks like this:
>
> EFI_CAPSULE_HEADER
> EFI_FIRMWARE_MANAGEMENT_CAPSULE_HEADER
> EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER
> EFI_FIRMWARE_IMAGE_AUTHENTICATION
>
> These structures would be used by the Platform Firmware Runtime Update
> driver to parse the format of capsule file to verify if the corresponding
> version number is valid. The EFI_CAPSULE_HEADER has been defined in the
> kernel, however the rest are not, thus introduce corresponding UEFI
> structures accordingly. Besides, EFI_FIRMWARE_MANAGEMENT_CAPSULE_HEADER
> and EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER need not be aligned and
> so the corresponding data types should be packed.
>
> Signed-off-by: Chen Yu <yu.c.chen@intel.com>
> ---
> v6: No change since v5.
> v5: No change since v4.
> v4: Revise the commit log to make it more clear. (Rafael J. Wysocki)
> ---
> include/linux/efi.h | 50 +++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 50 insertions(+)
>
> diff --git a/include/linux/efi.h b/include/linux/efi.h
> index 6b5d36babfcc..19ff834e1388 100644
> --- a/include/linux/efi.h
> +++ b/include/linux/efi.h
> @@ -148,6 +148,56 @@ typedef struct {
> u32 imagesize;
> } efi_capsule_header_t;
>
> +#pragma pack(1)
Why is this pragma suddenly needed now in this file?
If you really need this for a specific structure, use the "__packed"
attribute please.
thanks,
greg k-h
next prev parent reply other threads:[~2021-10-25 6:44 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-25 6:24 [PATCH v6 0/4] Introduce Platform Firmware Runtime Update and Telemetry drivers Chen Yu
2021-10-25 6:25 ` [PATCH v6 1/4] efi: Introduce EFI_FIRMWARE_MANAGEMENT_CAPSULE_HEADER and corresponding structures Chen Yu
2021-10-25 6:44 ` Greg Kroah-Hartman [this message]
2021-10-25 11:45 ` Chen Yu
2021-10-25 12:02 ` Greg Kroah-Hartman
2021-10-25 12:47 ` Chen Yu
2021-10-25 13:11 ` Ard Biesheuvel
2021-10-25 14:10 ` Chen Yu
2021-10-25 6:25 ` [PATCH v6 2/4] drivers/acpi: Introduce Platform Firmware Runtime Update device driver Chen Yu
2021-10-25 6:47 ` Greg Kroah-Hartman
2021-10-25 14:11 ` Chen Yu
2021-10-25 14:59 ` Greg Kroah-Hartman
2021-10-25 6:25 ` [PATCH v6 3/4] drivers/acpi: Introduce Platform Firmware Runtime Update Telemetry Chen Yu
2021-10-25 6:48 ` Greg Kroah-Hartman
2021-10-25 6:25 ` [PATCH v6 4/4] tools: Introduce power/acpi/pfru/pfru Chen Yu
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