[PATCH v12 01/29] arm64/sysreg: Define full value read/modify/write helpers

[Mark Brown]

We have read/modify write helpers for updating bitfields in sysregs if they
have changed but we do not have them for updating the whole register.
Define sysreg_cond_update() for that.

Signed-off-by: Mark Brown <broonie at kernel.org>
---
 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 7aa08d59d494..4b96449e0ffa 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -1235,6 +1235,12 @@
 		write_sysreg_s(__scs_new, sysreg);			\
 } while (0)
 
+#define sysreg_cond_update(sysreg, val) \
+	 sysreg_clear_set(sysreg, ~0UL, val)
+
+#define sysreg_cond_update_s(sysreg, val) \
+	 sysreg_clear_set_s(sysreg, ~0UL, val)
+
 #define write_sysreg_hcr(__val) do {					\
 	if (IS_ENABLED(CONFIG_AMPERE_ERRATUM_AC04_CPU_23) &&		\
 	   (!system_capabilities_finalized() ||				\

-- 
2.47.3