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7278a8fb8d
linux/arch/s390
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Sven Schnelle 7278a8fb8d s390: Mark psw in __load_psw_mask() as __unitialized 
Without __unitialized, the following code is generated when
INIT_STACK_ALL_ZERO is enabled:

86: d7 0f f0 a0 f0 a0     xc      160(16,%r15), 160(%r15)
8c: e3 40 f0 a0 00 24     stg     %r4, 160(%r15)
92: c0 10 00 00 00 08     larl    %r1, 0xa2
98: e3 10 f0 a8 00 24     stg     %r1, 168(%r15)
9e: b2 b2 f0 a0           lpswe   160(%r15)

The xc is not adding any security because psw is fully initialized
with the following instructions. Add __unitialized to the psw
definitiation to avoid the superfluous clearing of psw.

Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
2024-05-14 13:37:08 +02:00
..
appldata S390: Remove now superfluous sentinel elem from ctl_table arrays 2023-10-10 15:22:02 -07:00
boot s390: Compile kernel with -fPIC and link with -no-pie 2024-04-29 17:33:30 +02:00
configs s390/mm: provide simple ARCH_HAS_DEBUG_VIRTUAL support 2024-03-13 09:23:49 +01:00
crypto s390/paes: Reestablish retry loop in paes 2024-05-01 11:52:54 +02:00
hypfs s390/hypfs_sprp: remove unneeded DMA zone allocation 2024-02-09 13:58:14 +01:00
include s390: Mark psw in __load_psw_mask() as __unitialized 2024-05-14 13:37:08 +02:00
kernel s390/vtime: Use get_cpu_timer() 2024-05-14 13:37:07 +02:00
kvm - Store AP Query Configuration Information in a static buffer 2024-05-13 08:33:52 -07:00
lib s390/expoline: Make modules use kernel expolines 2024-04-17 13:38:03 +02:00
mm - Store AP Query Configuration Information in a static buffer 2024-05-13 08:33:52 -07:00
net s390/bpf: Fix bpf_plt pointer arithmetic 2024-03-19 22:52:43 -07:00
pci s390/pci: Drop unneeded reference to CONFIG_DMI 2024-04-29 17:33:30 +02:00
purgatory s390 updates for 6.5 merge window part 2 2023-07-06 13:18:30 -07:00
tools s390/boot: Rework deployment of the kernel image 2024-04-17 13:38:02 +02:00
Kbuild - An extensive rework of kexec and crash Kconfig from Eric DeVolder 2023-08-29 14:53:51 -07:00
Kconfig s390: Compile kernel with -fPIC and link with -no-pie 2024-04-29 17:33:30 +02:00
Kconfig.debug s390/Kconfig.debug: fix indentation 2022-06-01 12:03:15 +02:00
Makefile s390: Compile kernel with -fPIC and link with -no-pie 2024-04-29 17:33:30 +02:00