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authorGuo Ren <guoren@linux.alibaba.com>2020-03-28 19:14:37 +0800
committerGuo Ren <guoren@linux.alibaba.com>2020-04-03 12:40:07 +0800
commitaefd9461d34a1b0a2acad0750c43216c1c27b9d4 (patch)
tree5758db614e0a99fc098daa1433d400196e690704 /arch/csky/abiv1/inc
parent8f6bb793b2be82f1f73bfb416486f156f70b4314 (diff)
downloadlinux-sh-aefd9461d34a1b0a2acad0750c43216c1c27b9d4.tar.gz
csky: Fixup cpu speculative execution to IO area
For the memory size ( > 512MB, < 1GB), the MSA setting is: - SSEG0: PHY_START , PHY_START + 512MB - SSEG1: PHY_START + 512MB, PHY_START + 1GB But the real memory is no more than 1GB, there is a gap between the end size of memory and border of 1GB. CPU could speculatively execute to that gap and if the gap of the bus couldn't respond to the CPU request, then the crash will happen. Now make the setting with: - SSEG0: PHY_START , PHY_START + 512MB (no change) - SSEG1: Disabled (We use highmem to use the memory of 512MB~1GB) We also deprecated zhole_szie[] settings, it's only used by arm style CPUs. All memory gap should use Reserved setting of dts in csky system. Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Diffstat (limited to 'arch/csky/abiv1/inc')
-rw-r--r--arch/csky/abiv1/inc/abi/entry.h5
1 files changed, 1 insertions, 4 deletions
diff --git a/arch/csky/abiv1/inc/abi/entry.h b/arch/csky/abiv1/inc/abi/entry.h
index f35a9f3315ee..5056ebb902d1 100644
--- a/arch/csky/abiv1/inc/abi/entry.h
+++ b/arch/csky/abiv1/inc/abi/entry.h
@@ -172,10 +172,7 @@
addi r6, 0xe
cpwcr r6, cpcr30
- lsri r6, 28
- addi r6, 2
- lsli r6, 28
- addi r6, 0xe
+ movi r6, 0
cpwcr r6, cpcr31
.endm