linux-kernel - [PATCH 9/9] riscv: Add Ventana unaligned access table entries

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250207161939.46139-20-ajones@ventanamicro.com>
Date: Fri,  7 Feb 2025 17:19:49 +0100
From: Andrew Jones <ajones@...tanamicro.com>
To: linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Cc: paul.walmsley@...ive.com,
	palmer@...belt.com,
	charlie@...osinc.com,
	jesse@...osinc.com,
	Anup Patel <apatel@...tanamicro.com>
Subject: [PATCH 9/9] riscv: Add Ventana unaligned access table entries

Ventana harts always have fast unaligned access speeds, so skip the
unnecessary probing.

Signed-off-by: Andrew Jones <ajones@...tanamicro.com>
---
 arch/riscv/include/asm/vendorid_list.h     | 1 +
 arch/riscv/kernel/unaligned_access_speed.c | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/arch/riscv/include/asm/vendorid_list.h b/arch/riscv/include/asm/vendorid_list.h
index a5150cdf34d8..8dd55a847893 100644
--- a/arch/riscv/include/asm/vendorid_list.h
+++ b/arch/riscv/include/asm/vendorid_list.h
@@ -9,5 +9,6 @@
 #define MICROCHIP_VENDOR_ID	0x029
 #define SIFIVE_VENDOR_ID	0x489
 #define THEAD_VENDOR_ID		0x5b7
+#define VENTANA_VENDOR_ID	0x61f
 
 #endif
diff --git a/arch/riscv/kernel/unaligned_access_speed.c b/arch/riscv/kernel/unaligned_access_speed.c
index bd6db4c42daf..ff9905274c60 100644
--- a/arch/riscv/kernel/unaligned_access_speed.c
+++ b/arch/riscv/kernel/unaligned_access_speed.c
@@ -14,6 +14,7 @@
 #include <asm/hwprobe.h>
 #include <asm/sbi.h>
 #include <asm/vector.h>
+#include <asm/vendorid_list.h>
 
 #include "copy-unaligned.h"
 
@@ -251,6 +252,7 @@ struct unaligned_access_table_entry {
 };
 
 static struct unaligned_access_table_entry unaligned_access_table_entries[] = {
+	{ LEVEL_VENDOR, VENTANA_VENDOR_ID, 0, 0, RISCV_HWPROBE_MISALIGNED_SCALAR_FAST },
 };
 
 /*
@@ -460,6 +462,7 @@ static int __init vec_check_unaligned_access_speed_all_cpus(void *unused __alway
 #endif
 
 static struct unaligned_access_table_entry vec_unaligned_access_table_entries[] = {
+	{ LEVEL_VENDOR, VENTANA_VENDOR_ID, 0, 0, RISCV_HWPROBE_MISALIGNED_VECTOR_FAST },
 };
 
 static bool check_vector_unaligned_access_table(void)
-- 
2.48.1