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[kvm-unit-tests,02/10] arm64: fix get_"sysreg32" and make MPIDR 64bit

Message ID 1463385444-12916-3-git-send-email-drjones@redhat.com
State Superseded
Headers show

Commit Message

Andrew Jones May 16, 2016, 7:57 a.m. UTC 
mrs is always 64bit, so we should always use a 64bit register.
Sometimes we'll only want to return the lower 32, but not for
MPIDR, as that does define fields in the upper 32.

Signed-off-by: Andrew Jones <drjones@redhat.com>

---
 lib/arm64/asm/processor.h | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

-- 
2.4.11
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Patch

diff --git a/lib/arm64/asm/processor.h b/lib/arm64/asm/processor.h
index 84d5c7ce752b0..9a208ff729b7e 100644
--- a/lib/arm64/asm/processor.h
+++ b/lib/arm64/asm/processor.h
@@ -66,14 +66,17 @@  static inline unsigned long current_level(void)
 	return el & 0xc;
 }
 
-#define DEFINE_GET_SYSREG32(reg)				\
-static inline unsigned int get_##reg(void)			\
+#define DEFINE_GET_SYSREG(reg, type)				\
+static inline type get_##reg(void)				\
 {								\
-	unsigned int reg;					\
-	asm volatile("mrs %0, " #reg "_el1" : "=r" (reg));	\
-	return reg;						\
+	unsigned long r;					\
+	asm volatile("mrs %0, " #reg "_el1" : "=r" (r));	\
+	return (type)r;						\
 }
-DEFINE_GET_SYSREG32(mpidr)
+#define DEFINE_GET_SYSREG32(reg) DEFINE_GET_SYSREG(reg, unsigned int)
+#define DEFINE_GET_SYSREG64(reg) DEFINE_GET_SYSREG(reg, unsigned long)
+
+DEFINE_GET_SYSREG64(mpidr)
 
 /* Only support Aff0 for now, gicv2 only */
 #define mpidr_to_cpu(mpidr) ((int)((mpidr) & 0xff))