netdev - [RFC PATCH 2/2] mips: bpf: enable 32-bit eBPF JIT

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Message-Id: <20210720231036.3740924-3-johan.almbladh@anyfinetworks.com>
Date:   Wed, 21 Jul 2021 01:10:36 +0200
From:   Johan Almbladh <johan.almbladh@...finetworks.com>
To:     Tony.Ambardar@...il.com, ast@...nel.org, daniel@...earbox.net,
        andrii@...nel.org, tsbogend@...ha.franken.de, paulburton@...nel.org
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-mips@...r.kernel.org, ddaney@...iumnetworks.com,
        luke.r.nels@...il.com, fancer.lancer@...il.com, kafai@...com,
        songliubraving@...com, yhs@...com, john.fastabend@...il.com,
        kpsingh@...nel.org,
        Johan Almbladh <johan.almbladh@...finetworks.com>
Subject: [RFC PATCH 2/2] mips: bpf: enable 32-bit eBPF JIT

This patch enables the new 32-bit eBPF JIT for MIPS. It also disables
the old cBPF JIT to so cBPF programs are converted to use the new JIT.

Signed-off-by: Johan Almbladh <johan.almbladh@...finetworks.com>
---
 arch/mips/Kconfig | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index cee6087cd686..b87184bf18df 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -55,7 +55,6 @@ config MIPS
 	select HAVE_ARCH_TRACEHOOK
 	select HAVE_ARCH_TRANSPARENT_HUGEPAGE if CPU_SUPPORTS_HUGEPAGES
 	select HAVE_ASM_MODVERSIONS
-	select HAVE_CBPF_JIT if !64BIT && !CPU_MICROMIPS
 	select HAVE_CONTEXT_TRACKING
 	select HAVE_TIF_NOHZ
 	select HAVE_C_RECORDMCOUNT
@@ -63,7 +62,9 @@ config MIPS
 	select HAVE_DEBUG_STACKOVERFLOW
 	select HAVE_DMA_CONTIGUOUS
 	select HAVE_DYNAMIC_FTRACE
-	select HAVE_EBPF_JIT if 64BIT && !CPU_MICROMIPS && TARGET_ISA_REV >= 2
+	select HAVE_EBPF_JIT if ((32BIT && TARGET_ISA_REV <= 5) || \
+	                         (64BIT && TARGET_ISA_REV >= 2)) && \
+	                        !CPU_MICROMIPS
 	select HAVE_EXIT_THREAD
 	select HAVE_FAST_GUP
 	select HAVE_FTRACE_MCOUNT_RECORD
-- 
2.25.1