diff options
| author | Peter Collingbourne <pcc@google.com> | 2021-03-19 06:10:52 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2021-04-13 19:31:44 +0300 |
| commit | 2f79d2fc391e4ba64df908b8c07dda6c3a907056 (patch) | |
| tree | c1825e80d5a12fe7d89772a64acde6abaf0f9c01 /arch/arm64/include/asm/processor.h | |
| parent | e80a76aa1a91018d919d2210366943f9bf17009e (diff) | |
| download | linux-2f79d2fc391e4ba64df908b8c07dda6c3a907056.tar.xz | |
arm64: mte: make the per-task SCTLR_EL1 field usable elsewhere
In an upcoming change we are going to introduce per-task SCTLR_EL1
bits for PAC. Move the existing per-task SCTLR_EL1 field out of the
MTE-specific code so that we will be able to use it from both the
PAC and MTE code paths and make the task switching code more efficient.
Signed-off-by: Peter Collingbourne <pcc@google.com>
Link: https://linux-review.googlesource.com/id/Ic65fac78a7926168fa68f9e8da591c9e04ff7278
Link: https://lore.kernel.org/r/13d725cb8e741950fb9d6e64b2cd9bd54ff7c3f9.1616123271.git.pcc@google.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/processor.h')
| -rw-r--r-- | arch/arm64/include/asm/processor.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h index ca2cd75d3286..80895bb30490 100644 --- a/arch/arm64/include/asm/processor.h +++ b/arch/arm64/include/asm/processor.h @@ -151,11 +151,13 @@ struct thread_struct { struct ptrauth_keys_kernel keys_kernel; #endif #ifdef CONFIG_ARM64_MTE - u64 sctlr_tcf0; u64 gcr_user_excl; #endif + u64 sctlr_user; }; +#define SCTLR_USER_MASK SCTLR_EL1_TCF0_MASK + static inline void arch_thread_struct_whitelist(unsigned long *offset, unsigned long *size) { @@ -247,6 +249,8 @@ extern void release_thread(struct task_struct *); unsigned long get_wchan(struct task_struct *p); +void set_task_sctlr_el1(u64 sctlr); + /* Thread switching */ extern struct task_struct *cpu_switch_to(struct task_struct *prev, struct task_struct *next); |