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From: Atish Patra <atish.patra@wdc.com>
To: linux-kernel@vger.kernel.org
Cc: Albert Ou <aou@eecs.berkeley.edu>,
	Kees Cook <keescook@chromium.org>,
	Anup Patel <anup@brainfault.org>,
	linux-riscv@lists.infradead.org,
	Atish Patra <atish.patra@wdc.com>,
	Guo Ren <guoren@linux.alibaba.com>,
	Palmer Dabbelt <palmer@dabbelt.com>, Zong Li <zong.li@sifive.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Greentime Hu <greentime.hu@sifive.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Borislav Petkov <bp@suse.de>,
	Michel Lespinasse <walken@google.com>,
	Ard Biesheuvel <ardb@kernel.org>
Subject: [PATCH 2/5] RISC-V: Initialize SBI early
Date: Fri,  9 Oct 2020 14:13:41 -0700	[thread overview]
Message-ID: <20201009211344.2358688-3-atish.patra@wdc.com> (raw)
In-Reply-To: <20201009211344.2358688-1-atish.patra@wdc.com>

Currently, SBI is initialized towards the end of arch setup. This prevents
the set memory operations to be invoked earlier as it requires a full tlb
flush.

Initialize SBI as early as possible.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
---
 arch/riscv/kernel/setup.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
index 1db17f37736e..a5cac440aadf 100644
--- a/arch/riscv/kernel/setup.c
+++ b/arch/riscv/kernel/setup.c
@@ -90,6 +90,9 @@ void __init setup_arch(char **cmdline_p)
 		pr_err("No DTB found in kernel mappings\n");
 #endif
 
+#if IS_ENABLED(CONFIG_RISCV_SBI)
+	sbi_init();
+#endif
 #ifdef CONFIG_SWIOTLB
 	swiotlb_init(1);
 #endif
@@ -98,10 +101,6 @@ void __init setup_arch(char **cmdline_p)
 	kasan_init();
 #endif
 
-#if IS_ENABLED(CONFIG_RISCV_SBI)
-	sbi_init();
-#endif
-
 #ifdef CONFIG_SMP
 	setup_smp();
 #endif
-- 
2.25.1


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  parent reply	other threads:[~2020-10-09 21:14 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-09 21:13 [PATCH 0/5] Improve kernel section protections Atish Patra
2020-10-09 21:13 ` [PATCH 1/5] RISC-V: Move __start_kernel to .head.text Atish Patra
2020-10-09 21:13 ` Atish Patra [this message]
2020-10-09 21:13 ` [PATCH 3/5] RISC-V: Enforce protections for kernel sections early Atish Patra
2020-10-09 21:13 ` [PATCH 4/5] RISC-V: Protect .init.text & .init.data Atish Patra
2020-10-12 13:14   ` Greentime Hu
2020-10-12 23:26     ` Atish Patra
2020-10-13  1:28       ` Atish Patra
2020-10-13  3:08         ` Greentime Hu
2020-10-13 22:25           ` Atish Patra
2020-10-14  1:20             ` Jim Wilson
2020-10-14  5:24               ` Atish Patra
2020-10-16 18:24                 ` Atish Patra
2020-10-22  1:31                   ` Atish Patra
2020-10-22  5:03                     ` Anup Patel
2020-10-22  7:22                       ` Anup Patel
2020-10-22 17:13                         ` Atish Patra
2020-10-09 21:13 ` [PATCH 5/5] RISC-V: Move dynamic relocation section under __init Atish Patra

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