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Guo Ren e907a0d09b csky: Fixup cpu speculative execution to IO area
[ Upstream commit aefd9461d34a1b0a2acad0750c43216c1c27b9d4 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-04-23 10:36:38 +02:00
arch csky: Fixup cpu speculative execution to IO area 2020-04-23 10:36:38 +02:00
block block, bfq: invoke flush_idle_tree after reparent_active_queues in pd_offline 2020-04-23 10:36:26 +02:00
certs
crypto
Documentation arm64: tegra: Fix Tegra194 PCIe compatible string 2020-04-23 10:36:30 +02:00
drivers x86: ACPI: fix CPU hotplug deadlock 2020-04-23 10:36:38 +02:00
fs cifs: Allocate encryption header through kmalloc 2020-04-23 10:36:36 +02:00
include x86: ACPI: fix CPU hotplug deadlock 2020-04-23 10:36:38 +02:00
init
ipc
kernel dma-coherent: fix integer overflow in the reserved-memory dma allocation 2020-04-23 10:36:30 +02:00
lib
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net xsk: Add missing check on user supplied headroom size 2020-04-23 10:36:21 +02:00
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Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.