diff options
Diffstat (limited to 'arch/arm64/mm/proc.S')
| -rw-r--r-- | arch/arm64/mm/proc.S | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S index c2cb437821ca..2baeec419f62 100644 --- a/arch/arm64/mm/proc.S +++ b/arch/arm64/mm/proc.S @@ -199,7 +199,7 @@ SYM_FUNC_END(idmap_cpu_replace_ttbr1) #ifdef CONFIG_UNMAP_KERNEL_AT_EL0 -#define KPTI_NG_PTE_FLAGS (PTE_ATTRINDX(MT_NORMAL) | SWAPPER_PTE_FLAGS) +#define KPTI_NG_PTE_FLAGS (PTE_ATTRINDX(MT_NORMAL) | SWAPPER_PTE_FLAGS | PTE_WRITE) .pushsection ".idmap.text", "a" @@ -290,7 +290,7 @@ SYM_TYPED_FUNC_START(idmap_kpti_install_ng_mappings) isb mov temp_pte, x5 - mov pte_flags, #KPTI_NG_PTE_FLAGS + mov_q pte_flags, KPTI_NG_PTE_FLAGS /* Everybody is enjoying the idmap, so we can rewrite swapper. */ /* PGD */ @@ -454,6 +454,21 @@ SYM_FUNC_START(__cpu_setup) #endif /* CONFIG_ARM64_HW_AFDBM */ msr mair_el1, mair msr tcr_el1, tcr + + mrs_s x1, SYS_ID_AA64MMFR3_EL1 + ubfx x1, x1, #ID_AA64MMFR3_EL1_S1PIE_SHIFT, #4 + cbz x1, .Lskip_indirection + + mov_q x0, PIE_E0 + msr REG_PIRE0_EL1, x0 + mov_q x0, PIE_E1 + msr REG_PIR_EL1, x0 + + mov x0, TCR2_EL1x_PIE + msr REG_TCR2_EL1, x0 + +.Lskip_indirection: + /* * Prepare SCTLR */ |