On Sun, Apr 29, 2001 at 09:38:04PM +0200, Jamie Lokier wrote:
> Fwiw, modern x86 has global TLB entries too.
my x86-64 implementation is marking the tlb entry global of course (so
it's not flushed during context switch):
#define __PAGE_KERNEL_VSYSCALL \
(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
#define MAKE_GLOBAL(x) __pgprot((x) | _PAGE_GLOBAL)
#define PAGE_KERNEL_VSYSCALL MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL)
static void __init map_vsyscall(void)
{
extern char __vsyscall_0;
unsigned long physaddr_page0 = (unsigned long) &__vsyscall_0 - __START_KERNEL_map;
__set_fixmap(VSYSCALL_FIRST_PAGE, physaddr_page0, PAGE_KERNEL_VSYSCALL);
}
Andrea
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This archive was generated by hypermail 2b29 : Mon Apr 30 2001 - 21:00:23 EST