diff options
Diffstat (limited to 'arch/arm64/kernel/mte.c')
| -rw-r--r-- | arch/arm64/kernel/mte.c | 31 |
1 files changed, 0 insertions, 31 deletions
diff --git a/arch/arm64/kernel/mte.c b/arch/arm64/kernel/mte.c index 20a40e5a14fa..b538ff27a912 100644 --- a/arch/arm64/kernel/mte.c +++ b/arch/arm64/kernel/mte.c @@ -23,8 +23,6 @@ #include <asm/ptrace.h> #include <asm/sysreg.h> -u64 gcr_kernel_excl __ro_after_init; - static bool report_fault_once = true; static DEFINE_PER_CPU_READ_MOSTLY(u64, mte_tcf_preferred); @@ -104,26 +102,6 @@ int memcmp_pages(struct page *page1, struct page *page2) return ret; } -void mte_init_tags(u64 max_tag) -{ - static bool gcr_kernel_excl_initialized; - - if (!gcr_kernel_excl_initialized) { - /* - * The format of the tags in KASAN is 0xFF and in MTE is 0xF. - * This conversion extracts an MTE tag from a KASAN tag. - */ - u64 incl = GENMASK(FIELD_GET(MTE_TAG_MASK >> MTE_TAG_SHIFT, - max_tag), 0); - - gcr_kernel_excl = ~incl & SYS_GCR_EL1_EXCL_MASK; - gcr_kernel_excl_initialized = true; - } - - /* Enable the kernel exclude mask for random tags generation. */ - write_sysreg_s(SYS_GCR_EL1_RRND | gcr_kernel_excl, SYS_GCR_EL1); -} - static inline void __mte_enable_kernel(const char *mode, unsigned long tcf) { /* Enable MTE Sync Mode for EL1. */ @@ -262,15 +240,6 @@ void mte_suspend_enter(void) mte_check_tfsr_el1(); } -void mte_suspend_exit(void) -{ - if (!system_supports_mte()) - return; - - sysreg_clear_set_s(SYS_GCR_EL1, SYS_GCR_EL1_EXCL_MASK, gcr_kernel_excl); - isb(); -} - long set_mte_ctrl(struct task_struct *task, unsigned long arg) { u64 mte_ctrl = (~((arg & PR_MTE_TAG_MASK) >> PR_MTE_TAG_SHIFT) & |