linux-kernel - Re: [PATCH v2 1/7] iommu/io-pgtable: Introduce dynamic io-pgtable fmt registration

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]

Message-ID: <65b5382c-c7a9-0f18-96da-fe49e92e3b00@linaro.org>
Date:   Wed, 23 Dec 2020 17:38:19 +0200
From:   Georgi Djakov <georgi.djakov@...aro.org>
To:     "Isaac J. Manjarres" <isaacm@...eaurora.org>,
        iommu@...ts.linux-foundation.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        freedreno@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-arm-msm@...r.kernel.org
Cc:     will@...nel.org, joro@...tes.org, pdaly@...eaurora.org,
        pratikp@...eaurora.org, kernel-team@...roid.com,
        robin.murphy@....com
Subject: Re: [PATCH v2 1/7] iommu/io-pgtable: Introduce dynamic io-pgtable fmt
 registration

Hi Isaac,

On 22.12.20 2:44, Isaac J. Manjarres wrote:
> The io-pgtable code constructs an array of init functions for each
> page table format at compile time. This is not ideal, as this
> increases the footprint of the io-pgtable code, as well as prevents
> io-pgtable formats from being built as kernel modules.
> 
> In preparation for modularizing the io-pgtable formats, switch to a
> dynamic registration scheme, where each io-pgtable format can register
> their init functions with the io-pgtable code at boot or module
> insertion time.
> 
> Signed-off-by: Isaac J. Manjarres <isaacm@...eaurora.org>
> ---
>   drivers/iommu/io-pgtable-arm-v7s.c | 34 +++++++++++++-
>   drivers/iommu/io-pgtable-arm.c     | 90 ++++++++++++++++++++++++++----------
>   drivers/iommu/io-pgtable.c         | 94 ++++++++++++++++++++++++++++++++------
>   include/linux/io-pgtable.h         | 51 +++++++++++++--------
>   4 files changed, 209 insertions(+), 60 deletions(-)
> 
> diff --git a/drivers/iommu/io-pgtable-arm-v7s.c b/drivers/iommu/io-pgtable-arm-v7s.c
> index 1d92ac9..89aad2f 100644
> --- a/drivers/iommu/io-pgtable-arm-v7s.c
> +++ b/drivers/iommu/io-pgtable-arm-v7s.c
> @@ -28,6 +28,7 @@
[..]
> +static int __init arm_lpae_init(void)
> +{
> +	int ret, i;
> +
> +	for (i = 0; i < ARRAY_SIZE(io_pgtable_arm_lpae_init_fns); i++) {
> +		ret = io_pgtable_ops_register(&io_pgtable_arm_lpae_init_fns[i]);
> +		if (ret < 0) {
> +			pr_err("Failed to register ARM LPAE fmt: %d\n");

I guess we want to print the format here?

Thanks,
Georgi