From: george pee <georgepee@gmail.com>
Cc: george pee <georgepee@gmail.com>,
Russell King <linux@armlinux.org.uk>,
"Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>,
Catalin Marinas <catalin.marinas@arm.com>,
"Kirill A. Shutemov" <kirill.shtuemov@linux.intel.com>,
Austin Kim <austindh.kim@gmail.com>,
Ard Biesheuvel <ardb@kernel.org>, Mike Rapoport <rppt@kernel.org>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] Report support for optional ARMv8.2 half-precision floating point extension
Date: Thu, 1 Sep 2022 09:13:05 -0500 [thread overview]
Message-ID: <20220901141307.2361752-1-georgepee@gmail.com> (raw)
Report as fphp to be consistent with arm64
Signed-off-by: george pee <georgepee@gmail.com>
---
arch/arm/include/uapi/asm/hwcap.h | 1 +
arch/arm/kernel/setup.c | 1 +
arch/arm/vfp/vfpmodule.c | 2 ++
3 files changed, 4 insertions(+)
diff --git a/arch/arm/include/uapi/asm/hwcap.h b/arch/arm/include/uapi/asm/hwcap.h
index 990199d8b7c6..f975845ce5d3 100644
--- a/arch/arm/include/uapi/asm/hwcap.h
+++ b/arch/arm/include/uapi/asm/hwcap.h
@@ -28,6 +28,7 @@
#define HWCAP_IDIV (HWCAP_IDIVA | HWCAP_IDIVT)
#define HWCAP_LPAE (1 << 20)
#define HWCAP_EVTSTRM (1 << 21)
+#define HWCAP_FPHP (1 << 22)
/*
* HWCAP2 flags - for elf_hwcap2 (in kernel) and AT_HWCAP2
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 1e8a50a97edf..6694ced0552a 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -1249,6 +1249,7 @@ static const char *hwcap_str[] = {
"vfpd32",
"lpae",
"evtstrm",
+ "fphp",
NULL
};
diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
index 2cb355c1b5b7..cef8c64ce8bd 100644
--- a/arch/arm/vfp/vfpmodule.c
+++ b/arch/arm/vfp/vfpmodule.c
@@ -831,6 +831,8 @@ static int __init vfp_init(void)
if ((fmrx(MVFR1) & 0xf0000000) == 0x10000000)
elf_hwcap |= HWCAP_VFPv4;
+ if ((fmrx(MVFR1) & 0x0f000000) == 0x03000000)
+ elf_hwcap |= HWCAP_FPHP;
}
/* Extract the architecture version on pre-cpuid scheme */
} else {
--
2.37.3
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next reply other threads:[~2022-09-01 14:14 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-01 14:13 george pee [this message]
2022-09-09 11:39 ` [PATCH] Report support for optional ARMv8.2 half-precision floating point extension Catalin Marinas
2022-09-09 13:35 ` George Pee
2022-09-09 12:46 ` Robin Murphy
2022-09-09 13:34 ` George Pee
2022-09-09 14:07 ` Catalin Marinas
2022-09-09 14:57 ` George Pee
2022-09-09 15:05 ` Catalin Marinas
2022-09-12 13:05 ` Russell King (Oracle)
2022-09-12 18:09 ` George Pee
2022-09-09 14:17 ` Robin Murphy
2022-09-09 14:54 ` George Pee
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