We already define FIELD macros for ID_DFR0, so use them in the
one place where we're doing direct bit value manipulation.

Reviewed-by: Philippe Mathieu-Daudé <phi...@redhat.com>
Reviewed-by: Richard Henderson <richard.hender...@linaro.org>
Signed-off-by: Peter Maydell <peter.mayd...@linaro.org>
---
We have lots of this non-FIELD style in the code, of course;
I change this one purely because it otherwise looks a bit odd
sat next to the ID_AA64DFR0 line that was changed in the previous
patch...
---
 target/arm/cpu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 12bf9688007..1024f506c51 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -1719,7 +1719,7 @@ static void arm_cpu_realizefn(DeviceState *dev, Error 
**errp)
 #endif
     } else {
         cpu->id_aa64dfr0 = FIELD_DP64(cpu->id_aa64dfr0, ID_AA64DFR0, PMUVER, 
0);
-        cpu->id_dfr0 &= ~(0xf << 24);
+        cpu->id_dfr0 = FIELD_DP32(cpu->id_dfr0, ID_DFR0, PERFMON, 0);
         cpu->pmceid0 = 0;
         cpu->pmceid1 = 0;
     }
-- 
2.20.1


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