From: Shawn Landden <shawn@git.icu>
Cc: Shawn Landden <shawn@git.icu>, Paul Mackerras <paulus@samba.org>,
linuxppc-dev@lists.ozlabs.org
Subject: [PATCH] powerpc: Allow may_use_simd() to function as feature detection
Date: Tue, 14 May 2019 09:49:18 -0300 [thread overview]
Message-ID: <20190514124918.22590-1-shawn@git.icu> (raw)
In-Reply-To: <20190513005104.20140-1-shawn@git.icu>
ARM does this, so we might as well too.
I am a bit confused however as CONFIG_ALTIVEC does not select
CONFIG_PPC_FPU. Would you ever have altivec without a fpu?
Signed-off-by: Shawn Landden <shawn@git.icu>
---
arch/powerpc/include/asm/simd.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/powerpc/include/asm/simd.h b/arch/powerpc/include/asm/simd.h
index 9b066d633..2fe26f258 100644
--- a/arch/powerpc/include/asm/simd.h
+++ b/arch/powerpc/include/asm/simd.h
@@ -7,4 +7,11 @@
* It's always ok in process context (ie "not interrupt")
* but it is sometimes ok even from an irq.
*/
+#ifdef CONFIG_PPC_FPU
extern bool may_use_simd(void);
+#else
+static inline bool may_use_simd(void)
+{
+ return false;
+}
+#endif
--
2.21.0.1020.gf2820cf01a
next prev parent reply other threads:[~2019-05-14 12:51 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-12 16:50 [PATCH] powerpc: add simd.h implementation specific to PowerPC Shawn Landden
2019-05-12 16:50 ` Shawn Landden
2019-05-13 0:51 ` [PATCH RESEND] " Shawn Landden
2019-05-13 0:51 ` Shawn Landden
2019-05-13 11:53 ` Michael Ellerman
2019-05-13 11:53 ` Michael Ellerman
2019-05-14 1:44 ` [PATCH 1/2] [PowerPC] Add simd.h implementation Shawn Landden
2019-05-14 1:44 ` [PATCH 2/2] [PowerPC] Allow use of SIMD in interrupts from kernel code Shawn Landden
2019-05-14 5:43 ` [PATCH 1/2] [PowerPC] Add simd.h implementation Benjamin Herrenschmidt
2019-05-14 15:44 ` Shawn Landden
2019-05-14 15:46 ` [v3 " Shawn Landden
2019-05-14 15:46 ` [v3 2/2] [PowerPC] Allow use of SIMD in interrupts from kernel code Shawn Landden
2019-05-15 1:03 ` kbuild test robot
2019-05-14 2:23 ` [v2 1/2] [PowerPC] Add simd.h implementation Shawn Landden
2019-05-14 2:23 ` [v2 2/2] [PowerPC] Allow use of SIMD in interrupts from kernel code Shawn Landden
2019-05-14 7:22 ` Russell Currey
2019-05-14 15:35 ` Shawn Landden
2019-05-14 12:49 ` Shawn Landden [this message]
2019-05-14 18:06 ` [PATCH] powerpc: Allow may_use_simd() to function as feature detection Segher Boessenkool
2019-05-14 19:00 ` Shawn Landden
2019-05-15 1:36 ` [PATCH 1/2] [PowerPC] Add simd.h implementation Shawn Landden
2019-05-15 1:37 ` [v4 PATCH " Shawn Landden
2019-05-15 1:37 ` [v4 PATCH 2/2] [PowerPC] Allow use of SIMD in interrupts from kernel code Shawn Landden
2019-05-15 6:27 ` [v4 PATCH 1/2] [PowerPC] Add simd.h implementation Christophe Leroy
2019-05-16 1:12 ` Shawn Landden
2019-05-18 16:04 ` [RESEND v4 " Shawn Landden
2019-05-18 16:04 ` [RESEND v4 PATCH 2/2] [PowerPC] Allow use of SIMD in interrupts from kernel code Shawn Landden
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