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Merge commit 'upstream-x86-entry' into WIP.x86/mm

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Pull in a minimal set of v4.15 entry code changes, for a base for the MM isolation patches.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar
2017-12-01 10:32:48 +01:00
parent 1784f9144b 1e4c4f610f
commit 0fd2e9c53d
55 changed files with 577 additions and 359 deletions
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8
arch/x86/kernel/process.c
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@@ -49,7 +49,13 @@
*/
__visible DEFINE_PER_CPU_SHARED_ALIGNED(struct tss_struct, cpu_tss) = {
.x86_tss = {
.sp0 = TOP_OF_INIT_STACK,
/*
* .sp0 is only used when entering ring 0 from a lower
* privilege level. Since the init task never runs anything
* but ring 0 code, there is no need for a valid value here.
* Poison it.
*/
.sp0 = (1UL << (BITS_PER_LONG-1)) + 1,
#ifdef CONFIG_X86_32
.ss0 = __KERNEL_DS,
.ss1 = __KERNEL_CS,