diff options
| author | Marc Zyngier <marc.zyngier@arm.com> | 2018-09-27 19:15:32 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2018-10-01 15:36:01 +0300 |
| commit | 50de013d22e4e112d7b0778a0e7d032f16c46778 (patch) | |
| tree | 58bcb8f04ccd27b425c6dd86b3aae1e440d7c121 /arch/arm64/include/asm | |
| parent | 2a8905e18c55d5576d7a53da495b4de0cfcbc459 (diff) | |
| download | linux-50de013d22e4e112d7b0778a0e7d032f16c46778.tar.xz | |
arm64: compat: Add CNTVCT trap handler
Since people seem to make a point in breaking the userspace visible
counter, we have no choice but to trap the access. We already do this
for 64bit userspace, but this is lacking for compat. Let's provide
the required handler.
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm')
| -rw-r--r-- | arch/arm64/include/asm/esr.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/esr.h b/arch/arm64/include/asm/esr.h index 56d32e5557a5..5548712ce6e5 100644 --- a/arch/arm64/include/asm/esr.h +++ b/arch/arm64/include/asm/esr.h @@ -315,6 +315,9 @@ ESR_ELx_CP15_64_ISS_CRM_MASK | \ ESR_ELx_CP15_64_ISS_DIR_MASK) +#define ESR_ELx_CP15_64_ISS_SYS_CNTVCT (ESR_ELx_CP15_64_ISS_SYS_VAL(1, 14) | \ + ESR_ELx_CP15_64_ISS_DIR_READ) + #ifndef __ASSEMBLY__ #include <asm/types.h> |