linux-kernel - [PATCH 1/8] riscv: move riscv_noncoherent

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Message-Id: <20221006070818.3616-2-jszhang@kernel.org>
Date:   Thu,  6 Oct 2022 15:08:11 +0800
From:   Jisheng Zhang <jszhang@...nel.org>
To:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>
Cc:     linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/8] riscv: move riscv_noncoherent_supported() out of ZICBOM probe

It's a bit wired to call riscv_noncoherent_supported() once when
insmod a module. Move the calling out of feature patch func.

Signed-off-by: Jisheng Zhang <jszhang@...nel.org>
---
 arch/riscv/kernel/cpufeature.c | 7 +------
 arch/riscv/kernel/setup.c      | 4 ++++
 2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c
index 3b5583db9d80..03611b3ef45e 100644
--- a/arch/riscv/kernel/cpufeature.c
+++ b/arch/riscv/kernel/cpufeature.c
@@ -272,12 +272,7 @@ static bool __init_or_module cpufeature_probe_zicbom(unsigned int stage)
 	case RISCV_ALTERNATIVES_EARLY_BOOT:
 		return false;
 	default:
-		if (riscv_isa_extension_available(NULL, ZICBOM)) {
-			riscv_noncoherent_supported();
-			return true;
-		} else {
-			return false;
-		}
+		return riscv_isa_extension_available(NULL, ZICBOM);
 	}
 #endif
 
diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
index 2dfc463b86bb..1a055c3f5d9d 100644
--- a/arch/riscv/kernel/setup.c
+++ b/arch/riscv/kernel/setup.c
@@ -299,6 +299,10 @@ void __init setup_arch(char **cmdline_p)
 	riscv_init_cbom_blocksize();
 	riscv_fill_hwcap();
 	apply_boot_alternatives();
+#ifdef CONFIG_RISCV_DMA_NONCOHERENT
+	if (riscv_isa_extension_available(NULL, ZICBOM))
+		riscv_noncoherent_supported();
+#endif
 }
 
 static int __init topology_init(void)
-- 
2.37.2