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
| ||
|
Message-ID: <20240906114151.519028-3-jvetter@kalrayinc.com> Date: Fri, 6 Sep 2024 13:41:49 +0200 From: Julian Vetter <jvetter@...rayinc.com> To: Arnd Bergmann <arnd@...db.de>, Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, Guo Ren <guoren@...nel.org>, Huacai Chen <chenhuacai@...nel.org>, WANG Xuerui <kernel@...0n.name>, Andrew Morton <akpm@...ux-foundation.org> Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, linux-csky@...r.kernel.org, loongarch@...ts.linux.dev, Yann Sionneau <ysionneau@...rayinc.com>, Julian Vetter <jvetter@...rayinc.com> Subject: [PATCH 2/4] Activate GENERIC_IO for the arm64 architecture Use the generic __memcpy_{from,to}io and __memset_io for the arm64 processor architecture. Reviewed-by: Yann Sionneau <ysionneau@...rayinc.com> Signed-off-by: Julian Vetter <jvetter@...rayinc.com> --- arch/arm64/Kconfig | 1 + arch/arm64/kernel/io.c | 87 ------------------------------------------ 2 files changed, 1 insertion(+), 87 deletions(-) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index a2f8ff354ca6..3e5647597a03 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -140,6 +140,7 @@ config ARM64 select GENERIC_CPU_VULNERABILITIES select GENERIC_EARLY_IOREMAP select GENERIC_IDLE_POLL_SETUP + select GENERIC_IO select GENERIC_IOREMAP select GENERIC_IRQ_IPI select GENERIC_IRQ_PROBE diff --git a/arch/arm64/kernel/io.c b/arch/arm64/kernel/io.c index ef48089fbfe1..fe86ada23c7d 100644 --- a/arch/arm64/kernel/io.c +++ b/arch/arm64/kernel/io.c @@ -9,34 +9,6 @@ #include <linux/types.h> #include <linux/io.h> -/* - * Copy data from IO memory space to "real" memory space. - */ -void __memcpy_fromio(void *to, const volatile void __iomem *from, size_t count) -{ - while (count && !IS_ALIGNED((unsigned long)from, 8)) { - *(u8 *)to = __raw_readb(from); - from++; - to++; - count--; - } - - while (count >= 8) { - *(u64 *)to = __raw_readq(from); - from += 8; - to += 8; - count -= 8; - } - - while (count) { - *(u8 *)to = __raw_readb(from); - from++; - to++; - count--; - } -} -EXPORT_SYMBOL(__memcpy_fromio); - /* * This generates a memcpy that works on a from/to address which is aligned to * bits. Count is in terms of the number of bits sized quantities to copy. It @@ -78,62 +50,3 @@ void __iowrite32_copy_full(void __iomem *to, const void *from, size_t count) dgh(); } EXPORT_SYMBOL(__iowrite32_copy_full); - -/* - * Copy data from "real" memory space to IO memory space. - */ -void __memcpy_toio(volatile void __iomem *to, const void *from, size_t count) -{ - while (count && !IS_ALIGNED((unsigned long)to, 8)) { - __raw_writeb(*(u8 *)from, to); - from++; - to++; - count--; - } - - while (count >= 8) { - __raw_writeq(*(u64 *)from, to); - from += 8; - to += 8; - count -= 8; - } - - while (count) { - __raw_writeb(*(u8 *)from, to); - from++; - to++; - count--; - } -} -EXPORT_SYMBOL(__memcpy_toio); - -/* - * "memset" on IO memory space. - */ -void __memset_io(volatile void __iomem *dst, int c, size_t count) -{ - u64 qc = (u8)c; - - qc |= qc << 8; - qc |= qc << 16; - qc |= qc << 32; - - while (count && !IS_ALIGNED((unsigned long)dst, 8)) { - __raw_writeb(c, dst); - dst++; - count--; - } - - while (count >= 8) { - __raw_writeq(qc, dst); - dst += 8; - count -= 8; - } - - while (count) { - __raw_writeb(c, dst); - dst++; - count--; - } -} -EXPORT_SYMBOL(__memset_io); -- 2.34.1
Powered by blists - more mailing lists