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amd64 la57_trampoline: turn off global pages and PCID before turning off paging

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(cherry picked from commit 1be58e67eb24024bc808357771579d396679ecb0)
This commit is contained in:
Konstantin Belousov 2024-09-12 05:42:23 +03:00
parent 3f79c8c46f
commit cdcaf2e073
1 changed files with 7 additions and 0 deletions
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7
sys/amd64/amd64/locore.S
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@ -94,6 +94,8 @@ ENTRY(la57_trampoline)
movq %rsp,%r11
movq %rbx,%r10
movq %rbp,%r9
movq %cr4,%r8
orl $CR4_LA57,%r8d
leaq la57_trampoline_end(%rip),%rsp
movq %cr0,%rbp
@ -110,6 +112,10 @@ ENTRY(la57_trampoline)
l1: movl $(3<<3),%eax
movl %eax,%ss
movl %cr4,%eax
andl $~(CR4_PGE | CR4_PCIDE),%eax
movl %eax,%cr4
movl %ebp,%eax
andl $~CR0_PG,%eax
movl %eax,%cr0
@ -140,6 +146,7 @@ l1: movl $(3<<3),%eax
l2: movq %r11,%rsp
movq %r10,%rbx
movq %r9,%rbp
movq %r8,%cr4
retq
.p2align 4,0
ENTRY(la57_trampoline_gdt_desc)