Palmer Dabbelt 05942f780a Merge patch series "riscv: Fix set_memory_XX() and set_direct_map_XX()" ... Alexandre Ghiti <alexghiti@rivosinc.com> says: Those 2 patches fix the set_memory_XX() and set_direct_map_XX() APIs, which in turn fix STRICT_KERNEL_RWX and memfd_secret(). Those were broken since the permission changes were not applied to the linear mapping because the linear mapping is mapped using hugepages and walk_page_range_novma() does not split such mappings. To fix that, patch 1 disables PGD mappings in the linear mapping as it is hard to propagate changes at this level in *all* the page tables, this has the downside of disabling PMD mapping for sv32 and PUD (1GB) mapping for sv39 in the linear mapping (for specific kernels, we could add a Kconfig to enable ARCH_HAS_SET_DIRECT_MAP and STRICT_KERNEL_RWX if needed, I'm pretty sure we'll discuss that). patch 2 implements the split of the huge linear mappings so that walk_page_range_novma() can properly apply the permissions. The whole split is protected with mmap_sem in write mode, but I'm wondering if that's enough, any opinion on that is appreciated. * b4-shazam-merge: riscv: Fix set_memory_XX() and set_direct_map_XX() by splitting huge linear mappings riscv: Don't use PGD entries for the linear mapping Link: https://lore.kernel.org/r/20231108075930.7157-1-alexghiti@rivosinc.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>		2023-11-08 07:08:35 -08:00
..
boot	riscv: boot: Fix creation of loader.bin	2023-11-06 09:39:26 -08:00
configs	riscv: defconfig : add CONFIG_MMC_DW for starfive	2023-11-05 09:04:54 -08:00
errata	Merge patch series "Add non-coherent DMA support for AX45MP"	2023-09-08 11:24:34 -07:00
include	RISC-V: Probe misaligned access speed in parallel	2023-11-07 15:13:47 -08:00
kernel	RISC-V: Probe misaligned access speed in parallel	2023-11-07 15:13:47 -08:00
kvm	KVM/riscv changes for 6.6	2023-08-31 13:25:55 -04:00
lib	riscv: Use SYM_*() assembly macros instead of deprecated ones	2023-11-06 09:42:47 -08:00
mm	Merge patch series "riscv: Fix set_memory_XX() and set_direct_map_XX()"	2023-11-08 07:08:35 -08:00
net	bpf, riscv: use prog pack allocator in the BPF JIT	2023-09-06 06:26:07 -07:00
purgatory	riscv: Use SYM_*() assembly macros instead of deprecated ones	2023-11-06 09:42:47 -08:00
tools	riscv: Check relocations at compile time	2023-04-19 07:46:32 -07:00
Kbuild	kexec: rename ARCH_HAS_KEXEC_PURGATORY	2023-08-18 10:18:54 -07:00
Kconfig	riscv: select ARCH_PROC_KCORE_TEXT	2023-11-06 16:25:45 -08:00
Kconfig.debug	riscv: Add tests for riscv module loading	2023-11-07 14:59:32 -08:00
Kconfig.errata	riscv: Kconfig.errata: Add dependency for RISCV_SBI in ERRATA_ANDES config	2023-09-08 11:25:28 -07:00
Kconfig.socs	RISC-V: make ARCH_THEAD preclude XIP_KERNEL	2023-07-05 22:21:23 +02:00
Makefile	riscv: Implement Shadow Call Stack	2023-10-27 14:43:08 -07:00
Makefile.postlink	riscv: Use --emit-relocs in order to move .rela.dyn in init	2023-04-19 07:46:33 -07:00