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| author |   Mark Brown <broonie@kernel.org> | 2021-04-01 19:09:40 +0100 |
|---|---|---|
| committer |   Catalin Marinas <catalin.marinas@arm.com> | 2021-04-08 18:39:18 +0100 |
| commit | 31c00d2aeaa2da89361f5b64a64ca831433be5fc (patch) | |
| tree | ee5b9c2400bebe5d0182c971f140220107168876 /arch/arm64/include/asm/sysreg.h | |
| parent | arm64: Document requirements for fine grained traps at boot (diff) | |
| download | linux-dev-31c00d2aeaa2da89361f5b64a64ca831433be5fc.tar.xz linux-dev-31c00d2aeaa2da89361f5b64a64ca831433be5fc.zip | |
arm64: Disable fine grained traps on boot
The arm64 FEAT_FGT extension introduces a set of traps to EL2 for accesses
to small sets of registers and instructions from EL1 and EL0. Currently
Linux makes no use of this feature, ensure that it is not active at boot by
disabling the traps during EL2 setup.
Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210401180942.35815-3-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to '')
| -rw-r--r-- | arch/arm64/include/asm/sysreg.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h index d4a5fca984c3..b35468927363 100644 --- a/arch/arm64/include/asm/sysreg.h +++ b/arch/arm64/include/asm/sysreg.h @@ -475,9 +475,15 @@ #define SYS_PMCCFILTR_EL0 sys_reg(3, 3, 14, 15, 7) #define SYS_SCTLR_EL2 sys_reg(3, 4, 1, 0, 0) +#define SYS_HFGRTR_EL2 sys_reg(3, 4, 1, 1, 4) +#define SYS_HFGWTR_EL2 sys_reg(3, 4, 1, 1, 5) +#define SYS_HFGITR_EL2 sys_reg(3, 4, 1, 1, 6) #define SYS_ZCR_EL2 sys_reg(3, 4, 1, 2, 0) #define SYS_TRFCR_EL2 sys_reg(3, 4, 1, 2, 1) #define SYS_DACR32_EL2 sys_reg(3, 4, 3, 0, 0) +#define SYS_HDFGRTR_EL2 sys_reg(3, 4, 3, 1, 4) +#define SYS_HDFGWTR_EL2 sys_reg(3, 4, 3, 1, 5) +#define SYS_HAFGRTR_EL2 sys_reg(3, 4, 3, 1, 6) #define SYS_SPSR_EL2 sys_reg(3, 4, 4, 0, 0) #define SYS_ELR_EL2 sys_reg(3, 4, 4, 0, 1) #define SYS_IFSR32_EL2 sys_reg(3, 4, 5, 0, 1) |