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[Qemu-devel] [PATCH v2 for 4.1] target/arm: report ARMv8-A FP support fo
From: |
Alex Bennée |
Subject: |
[Qemu-devel] [PATCH v2 for 4.1] target/arm: report ARMv8-A FP support for AArch32 -cpu max |
Date: |
Thu, 11 Jul 2019 11:37:37 +0100 |
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 <address@hidden>
Reviewed-by: Richard Henderson <address@hidden>
---
target/arm/cpu.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index e75a64a25a..ad164a773b 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 */
--
2.20.1
- [Qemu-devel] [PATCH v2 for 4.1] target/arm: report ARMv8-A FP support for AArch32 -cpu max,
Alex Bennée <=