[PATCH v2 1/3] powerpc/pseries: define driver for Platform KeyStore

[Michael Ellerman]

Nathan Chancellor <nathan at kernel.org> writes:
> Hi all,
>
> On Sat, Jul 23, 2022 at 07:30:46AM -0400, Nayna Jain wrote:
>> PowerVM provides an isolated Platform Keystore(PKS) storage allocation
>> for each LPAR with individually managed access controls to store
>> sensitive information securely. It provides a new set of hypervisor
>> calls for Linux kernel to access PKS storage.
>> 
>> Define POWER LPAR Platform KeyStore(PLPKS) driver using H_CALL interface
>> to access PKS storage.
>> 
>> Signed-off-by: Nayna Jain <nayna at linux.ibm.com>
>
> This commit is now in mainline as commit 2454a7af0f2a ("powerpc/pseries:
> define driver for Platform KeyStore") and I just bisected a crash while
> boot testing Fedora's configuration [1] in QEMU to it. I initially
> noticed this in ClangBuiltLinux's CI but this doesn't appear to be clang
> specific since I can reproduce with GCC 12.2.1 from Fedora. I can
> reproduce with just powernv_defconfig + CONFIG_PPC_PSERIES=y +
> CONFIG_PSERIES_PLPKS=y. Our firmware and rootfs are available in our
> boot-utils repository [2].

Thanks, classic bug I should have spotted.

I didn't catch it in my testing because PLPKS isn't enabled in
our defconfigs.

Does your CI enable new options by default? Or are you booting
allyesconfig?

I'll send a fix.

cheers