linux-kernel - [PATCH v3 3/5] LoongArch: BPF: Add EXECMEM

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Message-Id: <20250709055029.723243-4-duanchenghao@kylinos.cn>
Date: Wed,  9 Jul 2025 13:50:27 +0800
From: Chenghao Duan <duanchenghao@...inos.cn>
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Subject: [PATCH v3 3/5] LoongArch: BPF: Add EXECMEM_BPF memory to execmem subsystem

The bpf_jit_alloc_exec function serves as the core mechanism for BPF
memory allocation, invoking execmem_alloc(EXECMEM_BPF, size) to
allocate memory. This change explicitly designates the allocation space
for EXECMEM_BPF.

Signed-off-by: Chenghao Duan <duanchenghao@...inos.cn>
---
 arch/loongarch/mm/init.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/loongarch/mm/init.c b/arch/loongarch/mm/init.c
index c3e4586a7..07cedd9ee 100644
--- a/arch/loongarch/mm/init.c
+++ b/arch/loongarch/mm/init.c
@@ -239,6 +239,12 @@ struct execmem_info __init *execmem_arch_setup(void)
 				.pgprot	= PAGE_KERNEL,
 				.alignment = 1,
 			},
+			[EXECMEM_BPF] = {
+				.start	= VMALLOC_START,
+				.end	= VMALLOC_END,
+				.pgprot	= PAGE_KERNEL,
+				.alignment = PAGE_SIZE,
+			},
 		},
 	};
 
-- 
2.43.0