From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Zihao Yu <yuzihao@ict.ac.cn>,
Anup Patel <anup@brainfault.org>,
Palmer Dabbelt <palmerdabbelt@google.com>,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.10 19/25] riscv,entry: fix misaligned base for excp_vect_table
Date: Thu, 15 Apr 2021 16:48:13 +0200 [thread overview]
Message-ID: <20210415144413.761162858@linuxfoundation.org> (raw)
In-Reply-To: <20210415144413.165663182@linuxfoundation.org>
From: Zihao Yu <yuzihao@ict.ac.cn>
[ Upstream commit ac8d0b901f0033b783156ab2dc1a0e73ec42409b ]
In RV64, the size of each entry in excp_vect_table is 8 bytes. If the
base of the table is not 8-byte aligned, loading an entry in the table
will raise a misaligned exception. Although such exception will be
handled by opensbi/bbl, this still causes performance degradation.
Signed-off-by: Zihao Yu <yuzihao@ict.ac.cn>
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/riscv/kernel/entry.S | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/riscv/kernel/entry.S b/arch/riscv/kernel/entry.S
index 744f3209c48d..76274a4a1d8e 100644
--- a/arch/riscv/kernel/entry.S
+++ b/arch/riscv/kernel/entry.S
@@ -447,6 +447,7 @@ ENDPROC(__switch_to)
#endif
.section ".rodata"
+ .align LGREG
/* Exception vector table */
ENTRY(excp_vect_table)
RISCV_PTR do_trap_insn_misaligned
--
2.30.2
next prev parent reply other threads:[~2021-04-15 15:12 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-15 14:47 [PATCH 5.10 00/25] 5.10.31-rc1 review Greg Kroah-Hartman
2021-04-15 14:47 ` [PATCH 5.10 01/25] interconnect: core: fix error return code of icc_link_destroy() Greg Kroah-Hartman
2021-04-15 14:47 ` [PATCH 5.10 02/25] gfs2: Flag a withdraw if init_threads() fails Greg Kroah-Hartman
2021-04-15 14:47 ` [PATCH 5.10 03/25] KVM: arm64: Hide system instruction access to Trace registers Greg Kroah-Hartman
2021-04-15 14:47 ` [PATCH 5.10 04/25] KVM: arm64: Disable guest access to trace filter controls Greg Kroah-Hartman
2021-04-15 14:47 ` [PATCH 5.10 05/25] drm/imx: imx-ldb: fix out of bounds array access warning Greg Kroah-Hartman
2021-04-15 14:48 ` [PATCH 5.10 06/25] gfs2: report "already frozen/thawed" errors Greg Kroah-Hartman
2021-04-15 14:48 ` [PATCH 5.10 07/25] ftrace: Check if pages were allocated before calling free_pages() Greg Kroah-Hartman
2021-04-15 14:48 ` [PATCH 5.10 08/25] tools/kvm_stat: Add restart delay Greg Kroah-Hartman
2021-04-15 14:48 ` [PATCH 5.10 09/25] drm/tegra: dc: Dont set PLL clock to 0Hz Greg Kroah-Hartman
2021-04-15 14:48 ` [PATCH 5.10 10/25] gpu: host1x: Use different lock classes for each client Greg Kroah-Hartman
2021-04-15 14:48 ` [PATCH 5.10 11/25] XArray: Fix splitting to non-zero orders Greg Kroah-Hartman
2021-04-15 14:48 ` [PATCH 5.10 12/25] radix tree test suite: Fix compilation Greg Kroah-Hartman
2021-04-15 15:12 ` Matthew Wilcox
2021-04-16 0:06 ` Sasha Levin
2021-04-15 14:48 ` [PATCH 5.10 13/25] block: only update parent bi_status when bio fail Greg Kroah-Hartman
2021-04-15 14:48 ` [PATCH 5.10 14/25] radix tree test suite: Register the main thread with the RCU library Greg Kroah-Hartman
2021-04-15 14:48 ` [PATCH 5.10 15/25] idr test suite: Take RCU read lock in idr_find_test_1 Greg Kroah-Hartman
2021-04-15 14:48 ` [PATCH 5.10 16/25] idr test suite: Create anchor before launching throbber Greg Kroah-Hartman
2021-04-15 14:48 ` [PATCH 5.10 17/25] null_blk: fix command timeout completion handling Greg Kroah-Hartman
2021-04-15 14:48 ` [PATCH 5.10 18/25] io_uring: dont mark S_ISBLK async work as unbounded Greg Kroah-Hartman
2021-04-15 14:48 ` Greg Kroah-Hartman [this message]
2021-04-15 14:48 ` [PATCH 5.10 20/25] block: dont ignore REQ_NOWAIT for direct IO Greg Kroah-Hartman
2021-04-15 14:48 ` [PATCH 5.10 21/25] netfilter: x_tables: fix compat match/target pad out-of-bound write Greg Kroah-Hartman
2021-04-15 14:48 ` [PATCH 5.10 22/25] perf map: Tighten snprintf() string precision to pass gcc check on some 32-bit arches Greg Kroah-Hartman
2021-04-15 14:48 ` [PATCH 5.10 23/25] net: sfp: relax bitrate-derived mode check Greg Kroah-Hartman
2021-04-15 14:48 ` [PATCH 5.10 24/25] net: sfp: cope with SFPs that set both LOS normal and LOS inverted Greg Kroah-Hartman
2021-04-15 14:48 ` [PATCH 5.10 25/25] xen/events: fix setting irq affinity Greg Kroah-Hartman
2021-04-15 19:11 ` [PATCH 5.10 00/25] 5.10.31-rc1 review Pavel Machek
2021-04-15 20:03 ` Andrei Rabusov
2021-04-15 22:42 ` Shuah Khan
2021-04-16 0:52 ` Florian Fainelli
2021-04-16 9:38 ` Naresh Kamboju
2021-04-16 19:57 ` Fox Chen
2021-04-16 20:07 ` Sudip Mukherjee
2021-04-17 1:01 ` Samuel Zou
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