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linux/arch/x86
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Thomas Gleixner 8eeda5fb59 x86/mm: Fix PTI for i386 some more 
commit c48b5a4cf3 upstream.

So it turns out that we have to do two passes of
pti_clone_entry_text(), once before initcalls, such that device and
late initcalls can use user-mode-helper / modprobe and once after
free_initmem() / mark_readonly().

Now obviously mark_readonly() can cause PMD splits, and
pti_clone_pgtable() doesn't like that much.

Allow the late clone to split PMDs so that pagetables stay in sync.

[peterz: Changelog and comments]
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lkml.kernel.org/r/20240806184843.GX37996@noisy.programming.kicks-ass.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2024-09-12 11:11:45 +02:00
..
boot x86/boot: Don't add the EFI stub to targets, again 2024-06-21 14:38:37 +02:00
coco x86/tdx: Fix data leak in mmio_read() 2024-09-12 11:11:25 +02:00
configs - The first, cleanup part of the microcode loader reorg tglx has been 2023-08-28 15:55:20 -07:00
crypto crypto: x86/sha512-avx2 - add missing vzeroupper 2024-06-12 11:11:32 +02:00
entry x86/bhi: Avoid warning in #DB handler due to BHI mitigation 2024-07-18 13:21:27 +02:00
events perf/x86/intel: Limit the period on Haswell 2024-09-12 11:11:25 +02:00
hyperv x86/hyperv: Use per cpu initial stack for vtl context 2024-03-26 18:20:06 -04:00
ia32 x86/signal/32: Merge native and compat 32-bit signal code 2022-10-19 09:58:49 +02:00
include x86/fpu: Avoid writing LBR bit to IA32_XSS unless supported 2024-09-12 11:11:28 +02:00
kernel x86/apic: Make x2apic_disable() work correctly 2024-09-12 11:11:28 +02:00
kvm KVM: SVM: Don't advertise Bus Lock Detect to guest if SVM support is missing 2024-09-12 11:11:24 +02:00
lib x86/kmsan: Fix hook for unaligned accesses 2024-09-12 11:11:29 +02:00
math-emu x86/fpu: Include asm/fpu/regset.h 2023-05-18 11:56:18 -07:00
mm x86/mm: Fix PTI for i386 some more 2024-09-12 11:11:45 +02:00
net Revert "bpf: Take return from set_memory_rox() into account with bpf_jit_binary_lock_ro()" 2024-07-09 11:44:29 +02:00
pci x86/pci/xen: Fix PCIBIOS_* return code handling 2024-08-03 08:53:21 +02:00
platform x86/platform/iosf_mbi: Convert PCIBIOS_* return codes to errnos 2024-08-03 08:53:21 +02:00
power mm/treewide: replace pud_large() with pud_leaf() 2024-04-10 16:35:46 +02:00
purgatory x86/purgatory: Switch to the position-independent small code model 2024-06-12 11:11:43 +02:00
ras treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
realmode x86/realmode: Make stack lock work in trampoline_compat() 2023-05-30 14:11:47 +02:00
tools x86/boot: Ignore relocations in .notes sections in walk_relocs() too 2024-06-12 11:11:36 +02:00
um um: Fix the -Wmissing-prototypes warning for get_thread_reg 2024-06-12 11:12:42 +02:00
video Merge drm/drm-next into drm-misc-next 2023-07-24 15:44:47 +02:00
virt/vmx/tdx x86/tdx: Provide common base for SEAMCALL and TDCALL C wrappers 2022-04-07 08:27:50 -07:00
xen x86/xen: Convert comma to semicolon 2024-08-03 08:53:33 +02:00
.gitignore x86/purgatory: Omit use of bin2c 2022-07-25 10:32:32 +02:00
Kbuild x86/cc: Move arch/x86/{kernel/cc_platform.c => coco/core.c} 2022-02-23 18:25:58 +01:00
Kconfig cpu: Ignore "mitigations" kernel parameter if CPU_MITIGATIONS=n 2024-06-12 11:11:24 +02:00
Kconfig.assembler x86/kconfig: Add as-instr64 macro to properly evaluate AS_WRUSS 2024-08-03 08:53:21 +02:00
Kconfig.cpu x86/Kconfig: Transmeta Crusoe is CPU family 5, not 6 2024-02-23 09:25:10 +01:00
Kconfig.debug x86/kconfig: Select ARCH_WANT_FRAME_POINTERS again when UNWINDER_FRAME_POINTER=y 2024-06-12 11:12:46 +02:00
Makefile kbuild: unify vdso_install rules 2024-06-12 11:12:32 +02:00
Makefile.postlink x86/build: Avoid relocation information in final vmlinux 2023-06-14 19:54:40 +02:00
Makefile.um um: Only disable SSE on clang to work around old GCC bugs 2023-04-04 09:57:05 +02:00
Makefile_32.cpu x86/build: Do not add -falign flags unconditionally for clang 2021-09-19 10:35:53 +09:00