From: Mark Brown broonie@kernel.org
mainline inclusion from mainline-v5.19-rc1 commit e6a6b34f97efe3ded077b31f4370b4c1206c9e56 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8EC9K CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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The macros we define for the bitfields within sysregs have very regular names, especially once we switch to automatic generation of those macros. Take advantage of this to define wrappers around FIELD_PREP() allowing us to simplify setting values in fields either numerically
SYS_FIELD_PREP(SCTLR_EL1, TCF0, 0x0)
or using the values of enumerations within the fields
SYS_FIELD_PREP_ENUM(SCTLR_EL1, TCF0, ASYMM)
Suggested-by: Mark Rutland mark.rutland@arm.com Signed-off-by: Mark Brown broonie@kernel.org Link: https://lore.kernel.org/r/20220503170233.507788-2-broonie@kernel.org Signed-off-by: Catalin Marinas catalin.marinas@arm.com Signed-off-by: Junhao He hejunhao3@huawei.com --- arch/arm64/include/asm/sysreg.h | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h index 7aded7acdd06..81c517b115e6 100644 --- a/arch/arm64/include/asm/sysreg.h +++ b/arch/arm64/include/asm/sysreg.h @@ -1224,4 +1224,10 @@
#endif
+#define SYS_FIELD_PREP(reg, field, val) \ + FIELD_PREP(reg##_##field##_MASK, val) + +#define SYS_FIELD_PREP_ENUM(reg, field, val) \ + FIELD_PREP(reg##_##field##_MASK, reg##_##field##_##val) + #endif /* __ASM_SYSREG_H */