[RFC PATCH v3 03/15] arm64: mm: Enable overlays for all EL1 indirect permissions
From: Kevin Brodsky <hidden>
Date: 2025-02-03 10:19:53
Also in:
linux-hardening, linux-mm, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
In preparation of using POE inside the kernel, enable "Overlay applied" for all stage 1 base permissions in PIR_EL1. This ensures that the permissions set in POR_EL1 affect all kernel mappings. Signed-off-by: Kevin Brodsky <redacted> --- arch/arm64/include/asm/pgtable-prot.h | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/arch/arm64/include/asm/pgtable-prot.h b/arch/arm64/include/asm/pgtable-prot.h
index a95f1f77bb39..7c0c30460900 100644
--- a/arch/arm64/include/asm/pgtable-prot.h
+++ b/arch/arm64/include/asm/pgtable-prot.h@@ -181,13 +181,13 @@ static inline bool __pure lpa2_is_enabled(void) PIRx_ELx_PERM(pte_pi_index(_PAGE_GCS), PIE_NONE_O) | \ PIRx_ELx_PERM(pte_pi_index(_PAGE_GCS_RO), PIE_NONE_O) | \ PIRx_ELx_PERM(pte_pi_index(_PAGE_EXECONLY), PIE_NONE_O) | \ - PIRx_ELx_PERM(pte_pi_index(_PAGE_READONLY_EXEC), PIE_R) | \ - PIRx_ELx_PERM(pte_pi_index(_PAGE_SHARED_EXEC), PIE_RW) | \ - PIRx_ELx_PERM(pte_pi_index(_PAGE_READONLY), PIE_R) | \ - PIRx_ELx_PERM(pte_pi_index(_PAGE_SHARED), PIE_RW) | \ - PIRx_ELx_PERM(pte_pi_index(_PAGE_KERNEL_ROX), PIE_RX) | \ - PIRx_ELx_PERM(pte_pi_index(_PAGE_KERNEL_EXEC), PIE_RWX) | \ - PIRx_ELx_PERM(pte_pi_index(_PAGE_KERNEL_RO), PIE_R) | \ - PIRx_ELx_PERM(pte_pi_index(_PAGE_KERNEL), PIE_RW)) + PIRx_ELx_PERM(pte_pi_index(_PAGE_READONLY_EXEC), PIE_R_O) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_SHARED_EXEC), PIE_RW_O) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_READONLY), PIE_R_O) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_SHARED), PIE_RW_O) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_KERNEL_ROX), PIE_RX_O) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_KERNEL_EXEC), PIE_RWX_O) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_KERNEL_RO), PIE_R_O) | \ + PIRx_ELx_PERM(pte_pi_index(_PAGE_KERNEL), PIE_RW_O)) #endif /* __ASM_PGTABLE_PROT_H */
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2.47.0