Janakarajan Natarajan 454de1e7d9 x86/asm: Fix MWAITX C-state hint value ...

As per "AMD64 Architecture Programmer's Manual Volume 3: General-Purpose
and System Instructions", MWAITX EAX[7:4]+1 specifies the optional hint
of the optimized C-state. For C0 state, EAX[7:4] should be set to 0xf.

Currently, a value of 0xf is set for EAX[3:0] instead of EAX[7:4]. Fix
this by changing MWAITX_DISABLE_CSTATES from 0xf to 0xf0.

This hasn't had any implications so far because setting reserved bits in
EAX is simply ignored by the CPU.

 [ bp: Fixup comment in delay_mwaitx() and massage. ]

Signed-off-by: Janakarajan Natarajan <Janakarajan.Natarajan@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Frederic Weisbecker <frederic@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "x86@kernel.org" <x86@kernel.org>
Cc: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20191007190011.4859-1-Janakarajan.Natarajan@amd.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2019-10-08 13:25:24 +02:00

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.gitignore

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atomic64_32.c

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atomic64_386_32.S

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atomic64_cx8_32.S

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2019-05-30 11:26:32 -07:00

cache-smp.c

smp: Remove smp_call_function() and on_each_cpu() return values

2019-06-23 14:26:26 +02:00

checksum_32.S

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clear_page_64.S

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cmdline.c

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cmpxchg8b_emu.S

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cmpxchg16b_emu.S

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2019-06-05 17:37:17 +02:00

copy_page_64.S

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copy_user_64.S

x86/asm: Make some functions local labels

2019-09-06 10:41:11 +02:00

cpu.c

x86/lib/cpu: Address missing prototypes warning

2019-08-08 08:25:53 +02:00

csum-copy_64.S

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csum-partial_64.c

x86/lib: Fix indentation issue, remove extra tab

2019-03-21 12:24:38 +01:00

csum-wrappers_64.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 223

2019-05-30 11:29:55 -07:00

delay.c

x86/asm: Fix MWAITX C-state hint value

2019-10-08 13:25:24 +02:00

error-inject.c

x86/asm: Mark all top level asm statements as .text

2019-04-19 17:46:55 +02:00

getuser.S

x86/asm: Make some functions local labels

2019-09-06 10:41:11 +02:00

hweight.S

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inat.c

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2019-05-30 11:26:35 -07:00

insn-eval.c

x86/insn-eval: Fix use-after-free access to LDT entry

2019-06-07 11:11:06 -07:00

insn.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156

2019-05-30 11:26:35 -07:00

iomap_copy_64.S

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 504

2019-06-19 17:09:56 +02:00

iomem.c

x86: explicitly align IO accesses in memcpy_{to,from}io

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kaslr.c

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Makefile

Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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memcpy_32.c

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memcpy_64.S

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memmove_64.S

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memset_64.S

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misc.c

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mmx_32.c

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msr-reg-export.c

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msr-reg.S

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msr-smp.c

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msr.c

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putuser.S

x86/asm: Make some functions local labels

2019-09-06 10:41:11 +02:00

retpoline.S

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string_32.c

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strstr_32.c

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usercopy_32.c

docs/core-api/mm: fix user memory accessors formatting

2019-03-05 21:07:20 -08:00

usercopy_64.c

x86/uaccess: Don't leak AC flag into fentry from mcsafe_handle_tail()

2019-07-18 21:01:05 +02:00

usercopy.c

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x86-opcode-map.txt

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