diff options
| author | Peter Collingbourne <pcc@google.com> | 2021-07-27 13:52:55 -0700 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2021-07-28 18:33:19 +0100 |
| commit | 638982a03fbcdcda9bcb97b62ceec2d4a0f88162 (patch) | |
| tree | 1fc10cce5d4a9d38ffa914b82feeafd3bdc9d5ac /arch/arm64/kernel/mte.c | |
| parent | 42b6b10a54f0bf00397511fc6d5b8a296b405563 (diff) | |
arm64: mte: rename gcr_user_excl to mte_ctrl
We are going to use this field to store more data. To prepare for
that, rename it and change the users to rely on the bit position of
gcr_user_excl in mte_ctrl.
Link: https://linux-review.googlesource.com/id/Ie1fd18e480100655f5d22137f5b22f4f3a9f9e2e
Signed-off-by: Peter Collingbourne <pcc@google.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20210727205300.2554659-2-pcc@google.com
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/kernel/mte.c')
| -rw-r--r-- | arch/arm64/kernel/mte.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/arch/arm64/kernel/mte.c b/arch/arm64/kernel/mte.c index 36f51b0e438a..a5269558210c 100644 --- a/arch/arm64/kernel/mte.c +++ b/arch/arm64/kernel/mte.c @@ -195,7 +195,7 @@ void mte_check_tfsr_el1(void) static void set_gcr_el1_excl(u64 excl) { - current->thread.gcr_user_excl = excl; + current->thread.mte_ctrl = excl; /* * SYS_GCR_EL1 will be set to current->thread.gcr_user_excl value @@ -260,8 +260,8 @@ void mte_suspend_exit(void) long set_mte_ctrl(struct task_struct *task, unsigned long arg) { u64 sctlr = task->thread.sctlr_user & ~SCTLR_EL1_TCF0_MASK; - u64 gcr_excl = ~((arg & PR_MTE_TAG_MASK) >> PR_MTE_TAG_SHIFT) & - SYS_GCR_EL1_EXCL_MASK; + u64 mte_ctrl = (~((arg & PR_MTE_TAG_MASK) >> PR_MTE_TAG_SHIFT) & + SYS_GCR_EL1_EXCL_MASK) << MTE_CTRL_GCR_USER_EXCL_SHIFT; if (!system_supports_mte()) return 0; @@ -282,10 +282,10 @@ long set_mte_ctrl(struct task_struct *task, unsigned long arg) if (task != current) { task->thread.sctlr_user = sctlr; - task->thread.gcr_user_excl = gcr_excl; + task->thread.mte_ctrl = mte_ctrl; } else { set_task_sctlr_el1(sctlr); - set_gcr_el1_excl(gcr_excl); + set_gcr_el1_excl(mte_ctrl); } return 0; @@ -294,7 +294,9 @@ long set_mte_ctrl(struct task_struct *task, unsigned long arg) long get_mte_ctrl(struct task_struct *task) { unsigned long ret; - u64 incl = ~task->thread.gcr_user_excl & SYS_GCR_EL1_EXCL_MASK; + u64 mte_ctrl = task->thread.mte_ctrl; + u64 incl = (~mte_ctrl >> MTE_CTRL_GCR_USER_EXCL_SHIFT) & + SYS_GCR_EL1_EXCL_MASK; if (!system_supports_mte()) return 0; |