* [PATCH] random: inform about bootloader-provided randomness
@ 2019-10-05 11:36 Dominik Brodowski
2019-10-15 0:40 ` Will Deacon
0 siblings, 1 reply; 3+ messages in thread
From: Dominik Brodowski @ 2019-10-05 11:36 UTC (permalink / raw)
To: Ard Biesheuvel, Hsin-Yi Wang, Stephen Boyd, Rob Herring,
Theodore Ts'o, Will Deacon
Cc: linux-kernel
Inform how many bits of randomness were provided by the bootloader,
and whether we trust that input.
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Hsin-Yi Wang <hsinyi@chromium.org>
Cc: Stephen Boyd <swboyd@chromium.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Will Deacon <will@kernel.org>
diff --git a/drivers/char/random.c b/drivers/char/random.c
index de434feb873a..673375e05c0d 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -2515,6 +2515,10 @@ EXPORT_SYMBOL_GPL(add_hwgenerator_randomness);
*/
void add_bootloader_randomness(const void *buf, unsigned int size)
{
+ pr_notice("random: adding %u bits of %sbootloader-provided randomness",
+ size * 8,
+ IS_ENABLED(CONFIG_RANDOM_TRUST_BOOTLOADER) ? "trusted " : "");
+
if (IS_ENABLED(CONFIG_RANDOM_TRUST_BOOTLOADER))
add_hwgenerator_randomness(buf, size, size * 8);
else
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] random: inform about bootloader-provided randomness
2019-10-05 11:36 [PATCH] random: inform about bootloader-provided randomness Dominik Brodowski
@ 2019-10-15 0:40 ` Will Deacon
2019-10-15 9:44 ` Hsin-Yi Wang
0 siblings, 1 reply; 3+ messages in thread
From: Will Deacon @ 2019-10-15 0:40 UTC (permalink / raw)
To: Dominik Brodowski
Cc: Ard Biesheuvel, Hsin-Yi Wang, Stephen Boyd, Rob Herring,
Theodore Ts'o, linux-kernel
On Sat, Oct 05, 2019 at 01:36:32PM +0200, Dominik Brodowski wrote:
> Inform how many bits of randomness were provided by the bootloader,
> and whether we trust that input.
>
> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> Cc: Hsin-Yi Wang <hsinyi@chromium.org>
> Cc: Stephen Boyd <swboyd@chromium.org>
> Cc: Rob Herring <robh@kernel.org>
> Cc: Theodore Ts'o <tytso@mit.edu>
> Cc: Will Deacon <will@kernel.org>
>
> diff --git a/drivers/char/random.c b/drivers/char/random.c
> index de434feb873a..673375e05c0d 100644
> --- a/drivers/char/random.c
> +++ b/drivers/char/random.c
> @@ -2515,6 +2515,10 @@ EXPORT_SYMBOL_GPL(add_hwgenerator_randomness);
> */
> void add_bootloader_randomness(const void *buf, unsigned int size)
> {
> + pr_notice("random: adding %u bits of %sbootloader-provided randomness",
> + size * 8,
> + IS_ENABLED(CONFIG_RANDOM_TRUST_BOOTLOADER) ? "trusted " : "");
> +
> if (IS_ENABLED(CONFIG_RANDOM_TRUST_BOOTLOADER))
> add_hwgenerator_randomness(buf, size, size * 8);
> else
Looks fine to me:
Acked-by: Will Deacon <will@kernel.org>
Will
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] random: inform about bootloader-provided randomness
2019-10-15 0:40 ` Will Deacon
@ 2019-10-15 9:44 ` Hsin-Yi Wang
0 siblings, 0 replies; 3+ messages in thread
From: Hsin-Yi Wang @ 2019-10-15 9:44 UTC (permalink / raw)
To: Will Deacon
Cc: Dominik Brodowski, Ard Biesheuvel, Stephen Boyd, Rob Herring,
Theodore Ts'o, lkml
On Tue, Oct 15, 2019 at 8:40 AM Will Deacon <will@kernel.org> wrote:
>
> On Sat, Oct 05, 2019 at 01:36:32PM +0200, Dominik Brodowski wrote:
> > Inform how many bits of randomness were provided by the bootloader,
> > and whether we trust that input.
> >
> > Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
> > Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> > Cc: Hsin-Yi Wang <hsinyi@chromium.org>
> > Cc: Stephen Boyd <swboyd@chromium.org>
> > Cc: Rob Herring <robh@kernel.org>
> > Cc: Theodore Ts'o <tytso@mit.edu>
> > Cc: Will Deacon <will@kernel.org>
> >
> > diff --git a/drivers/char/random.c b/drivers/char/random.c
> > index de434feb873a..673375e05c0d 100644
> > --- a/drivers/char/random.c
> > +++ b/drivers/char/random.c
> > @@ -2515,6 +2515,10 @@ EXPORT_SYMBOL_GPL(add_hwgenerator_randomness);
> > */
> > void add_bootloader_randomness(const void *buf, unsigned int size)
> > {
> > + pr_notice("random: adding %u bits of %sbootloader-provided randomness",
> > + size * 8,
> > + IS_ENABLED(CONFIG_RANDOM_TRUST_BOOTLOADER) ? "trusted " : "");
> > +
> > if (IS_ENABLED(CONFIG_RANDOM_TRUST_BOOTLOADER))
> > add_hwgenerator_randomness(buf, size, size * 8);
> > else
>
> Looks fine to me:
>
> Acked-by: Will Deacon <will@kernel.org>
>
> Will
Thanks.
Acked-by: Hsin-Yi Wang <hsinyi@chromium.org>
^ permalink raw reply [flat|nested] 3+ messages in thread
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2019-10-05 11:36 [PATCH] random: inform about bootloader-provided randomness Dominik Brodowski
2019-10-15 0:40 ` Will Deacon
2019-10-15 9:44 ` Hsin-Yi Wang
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