[PULL,01/10] target/arm: report ARMv8-A FP support for AArch32 -cpu max
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Message ID 20190715134211.23063-2-peter.maydell@linaro.org
State New
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Series
  • [PULL,01/10] target/arm: report ARMv8-A FP support for AArch32 -cpu max
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Commit Message

Peter Maydell July 15, 2019, 1:42 p.m. UTC
From: Alex Bennée <alex.bennee@linaro.org>

When we converted to using feature bits in 602f6e42cfbf we missed out
the fact (dp && arm_dc_feature(s, ARM_FEATURE_V8)) was supported for
-cpu max configurations. This caused a regression in the GCC test
suite. Fix this by setting the appropriate bits in mvfr1.FPHP to
report ARMv8-A with FP support (but not ARMv8.2-FP16).

Fixes: https://bugs.launchpad.net/qemu/+bug/1836078
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190711103737.10017-1-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/cpu.c | 4 ++++
 1 file changed, 4 insertions(+)

Patch
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diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index e75a64a25a4..ad164a773b2 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -2452,6 +2452,10 @@  static void arm_max_initfn(Object *obj)
             t = FIELD_DP32(t, ID_ISAR6, SPECRES, 1);
             cpu->isar.id_isar6 = t;
 
+            t = cpu->isar.mvfr1;
+            t = FIELD_DP32(t, MVFR1, FPHP, 2);     /* v8.0 FP support */
+            cpu->isar.mvfr1 = t;
+
             t = cpu->isar.mvfr2;
             t = FIELD_DP32(t, MVFR2, SIMDMISC, 3); /* SIMD MaxNum */
             t = FIELD_DP32(t, MVFR2, FPMISC, 4);   /* FP MaxNum */