[PATCH] mm: rectify a page bad reason

Hi When I was doing some memory-related projects, it always reported error "nonzero mapcount", but its judgment condition was that _mapcount was not equal to -1, so I felt the original string was a bit inappropriate, so I tried to update it. Signed-off-by: Rongwei Wang --- mm/page_a

Re: [PATCH 0/3] arm64:msr: Add MSR driver

> On Dec 3, 2020, at 7:45 PM, Marc Zyngier wrote: > > On 2020-12-03 11:25, Rongwei Wang wrote: >>> 2020年12月3日 下午4:35，Marc Zyngier 写道： > > [...] > >>> But what does it mean to change random system registers while the kernel >>> itself is using t

Re: [PATCH 0/3] arm64:msr: Add MSR driver

> 2020年12月3日 下午4:35，Marc Zyngier 写道： > > On 2020-12-03 05:45, Rongwei Wang wrote: >>> 2020年12月1日 下午11:37，Marc Zyngier 写道： >>> On 2020-12-01 14:25, wangrongwei wrote: >>>>> 2020年12月1日 下午4:12，Marc Zyngier 写道： >>>>> On 2020-12-01 03:09,

Re: [PATCH 0/3] arm64:msr: Add MSR driver

registers. > reason for userspace to ever access privileged system registers, and > the fact that x86 has such feature isn't a good justification. > >M. > -- > Jazz is not dead. It just smells funny… Sorry for the delayed response. Regards, Rongwei Wang.

Re: [PATCH 0/3] arm64:msr: Add MSR driver

> 2020年12月1日 下午11:25，Borislav Petkov 写道： > > On Tue, Dec 01, 2020 at 11:17:39PM +0800, Rongwei Wang wrote: >> In ARM, the system registers can only be accessed through msr and mrs, >> so the problem created by MSR driver (depend on rdmsr and wrmsr) in >> x86 is not

Re: [PATCH 0/3] arm64:msr: Add MSR driver

. In addition, we want cross-platform compatabilities, and fill these gaps in the ARM. > > -- > Regards/Gruss, >Boris. > > https://people.kernel.org/tglx/notes-about-netiquette Regards, Rongwei Wang.

[PATCH 1/3] arm64:insn: Export symbols for MSR ARM driver

register_undef_hook and unregister_undef_hook to handle the low probability undefined exception which triggered only by MSR-ARM driver. Signed-off-by: Rongwei Wang --- arch/arm64/kernel/insn.c | 2 ++ arch/arm64/kernel/traps.c | 2 ++ 2 files changed, 4 insertions(+) diff --git a/arch/arm64

[PATCH 0/3] arm64:msr: Add MSR driver

: 409 Readable registers: 196 The above is a test of more than 600 system registers, and no system exception occurred Rongwei Wang (3): arm64:insn: Export the symbol to modify code text arm64:msr: Introduce MSR ARM driver arm64:msr: Enable MSR ARM driver arch/arm64/Kconfig | 9

[PATCH 3/3] arm64:msr: Enable MSR ARM driver

By default, MSR-ARM is compiled as a module. Signed-off-by: Rongwei Wang --- arch/arm64/configs/defconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig index 5cfe3cf..952cf6a 100644 --- a/arch/arm64/configs/defconfig +++ b/arch

[PATCH 2/3] arm64:msr: Introduce MSR ARM driver

: Rongwei Wang --- arch/arm64/Kconfig | 9 + arch/arm64/include/asm/msr_arm.h | 75 arch/arm64/kernel/Makefile | 3 +- arch/arm64/kernel/msr_arm.c | 399 +++ arch/arm64/kernel/msr_smp.c | 249 5