Heiko Carstens 33bd8d153c s390: Keep inittext section writable ... There is no added security by making the inittext section non-writable, however it does split part of the kernel mapping into 4K mappings instead of 1M mappings: ---[ Kernel Image Start ]--- 0x000003ffe0000000-0x000003ffe0e00000 14M PMD RO X 0x000003ffe0e00000-0x000003ffe0ec7000 796K PTE RO X 0x000003ffe0ec7000-0x000003ffe0f00000 228K PTE RO NX 0x000003ffe0f00000-0x000003ffe1300000 4M PMD RO NX 0x000003ffe1300000-0x000003ffe1353000 332K PTE RO NX 0x000003ffe1353000-0x000003ffe1400000 692K PTE RW NX 0x000003ffe1400000-0x000003ffe1500000 1M PMD RW NX 0x000003ffe1500000-0x000003ffe1700000 2M PTE RW NX <--- 0x000003ffe1700000-0x000003ffe1800000 1M PMD RW NX 0x000003ffe1800000-0x000003ffe187e000 504K PTE RW NX ---[ Kernel Image End ]--- Keep the inittext writable and enable instruction execution protection (aka noexec) later to prevent this. This also allows to use the generic free_initmem() implementation. ---[ Kernel Image Start ]--- 0x000003ffe0000000-0x000003ffe0e00000 14M PMD RO X 0x000003ffe0e00000-0x000003ffe0ec7000 796K PTE RO X 0x000003ffe0ec7000-0x000003ffe0f00000 228K PTE RO NX 0x000003ffe0f00000-0x000003ffe1300000 4M PMD RO NX 0x000003ffe1300000-0x000003ffe1353000 332K PTE RO NX 0x000003ffe1353000-0x000003ffe1400000 692K PTE RW NX 0x000003ffe1400000-0x000003ffe1800000 4M PMD RW NX <--- 0x000003ffe1800000-0x000003ffe187e000 504K PTE RW NX ---[ Kernel Image End ]--- Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>		2024-07-31 16:30:20 +02:00
..
appldata	sysctl: treewide: constify the ctl_table argument of proc_handlers	2024-07-24 20:59:29 +02:00
boot	more s390 updates for 6.11 merge window	2024-07-26 10:47:53 -07:00
configs	s390: Remove protvirt and kvm config guards for uv code	2024-07-23 16:02:33 +02:00
crypto	s390/crc32: Add missing MODULE_DESCRIPTION() macro	2024-06-28 14:52:30 +02:00
hypfs	s390/hypfs_diag: Diag204 busy loop	2024-07-10 19:50:45 +02:00
include	more s390 updates for 6.11 merge window	2024-07-26 10:47:53 -07:00
kernel	s390/vmlinux.lds.S: Move ro_after_init section behind rodata section	2024-07-31 16:30:20 +02:00
kvm	ARM:	2024-07-20 12:41:03 -07:00
lib	s390/alternatives: Rework to allow for callbacks	2024-07-23 16:02:31 +02:00
mm	s390: Keep inittext section writable	2024-07-31 16:30:20 +02:00
net	s390/bpf: Implement exceptions	2024-07-08 16:39:35 +02:00
pci	s390/pci: Allow allocation of more than 1 MSI interrupt	2024-07-23 15:54:58 +02:00
purgatory	Makefile: remove redundant tool coverage variables	2024-05-14 23:35:48 +09:00
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: Remove protvirt and kvm config guards for uv code	2024-07-23 16:02:33 +02:00
Kconfig.debug
Makefile	s390: use a larger stack for KMSAN	2024-07-03 19:30:24 -07:00