[Qemu-devel] [PATCH] linux-user: Report AArch64 FP16 support via hwcap bits

[Peter Maydell]

Set the appropriate Linux hwcap bits to tell the guest binary if we
have implemented half-precision floating point support.

Signed-off-by: Peter Maydell <address@hidden>
---
This is intended to go after Alex's FP16 stuff since it
uses the ARM_FEATURE_V8_FP16 bit that defines.
There is as yet no kernel definition of an AArch32 hwcap
bit to report FP16.

Based-on: <address@hidden>

 linux-user/elfload.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index 8bb9a2c3e8..80f1b32fbe 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -551,6 +551,8 @@ static uint32_t get_elf_hwcap(void)
     GET_FEATURE(ARM_FEATURE_V8_SM3, ARM_HWCAP_A64_SM3);
     GET_FEATURE(ARM_FEATURE_V8_SM4, ARM_HWCAP_A64_SM4);
     GET_FEATURE(ARM_FEATURE_V8_SHA512, ARM_HWCAP_A64_SHA512);
+    GET_FEATURE(ARM_FEATURE_V8_FP16,
+                ARM_HWCAP_A64_FPHP | ARM_HWCAP_A64_ASIMDHP);
 #undef GET_FEATURE
 
     return hwcaps;
-- 
2.16.2