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Make sure SSE is enabled

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bzt 2021-07-23 00:19:51 +02:00
parent bfb6ad022c
commit 1d5cec5fb2
1 changed files with 9 additions and 0 deletions
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9
uefi/crt_x86_64.c
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@ -180,6 +180,15 @@ int uefi_init (
#else
(void)i;
#endif
/* make sure SSE is enabled, because some say there are buggy firmware in the wild not doing that */
__asm__ __volatile__ (
" movq %cr0, %rax\n"
" andb $0xF1, %al\n"
" movq %rax, %cr0\n"
" movq %cr4, %rax\n"
" orw $3 << 9, %ax\n"
" mov %rax, %cr4\n"
);
/* save EFI pointers and loaded image into globals */
IM = image;
ST = systab;