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Differential D55218 Diff 171768 sys/amd64/amd64/pmap.c

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sys/amd64/amd64/pmap.c

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extern const char la57_trampoline[]; extern const char la57_trampoline[];
static void static void
pmap_bootstrap_la57(vm_paddr_t *firstaddr) pmap_bootstrap_la57(vm_paddr_t *firstaddr)
{ {
void (*la57_tramp)(uint64_t pml5); void (*la57_tramp)(uint64_t pml5);
pml5_entry_t *pt; pml5_entry_t *pt;
uint64_t cr4;
if ((cpu_stdext_feature2 & CPUID_STDEXT2_LA57) == 0) if ((cpu_stdext_feature2 & CPUID_STDEXT2_LA57) == 0)
return; return;
la57 = 1; la57 = 1;
TUNABLE_INT_FETCH("vm.pmap.la57", &la57); TUNABLE_INT_FETCH("vm.pmap.la57", &la57);
if (!la57) if (!la57)
return; return;
KPML5phys = allocpages(firstaddr, 1); KPML5phys = allocpages(firstaddr, 1);
KPML4phys = rcr3() & 0xfffff000; /* pml4 from loader must be < 4G */ KPML4phys = rcr3() & 0xfffff000; /* pml4 from loader must be < 4G */
pt = (pml5_entry_t *)KPML5phys; pt = (pml5_entry_t *)KPML5phys;
pt[0] = KPML4phys | X86_PG_V | X86_PG_RW | X86_PG_A | X86_PG_M; pt[0] = KPML4phys | X86_PG_V | X86_PG_RW | X86_PG_A | X86_PG_M;
pt[NPML4EPG - 1] = KPML4phys | X86_PG_V | X86_PG_RW | X86_PG_A | pt[NPML4EPG - 1] = KPML4phys | X86_PG_V | X86_PG_RW | X86_PG_A |
X86_PG_M; X86_PG_M;
la57_tramp = (void (*)(uint64_t))((uintptr_t)la57_trampoline - la57_tramp = (void (*)(uint64_t))((uintptr_t)la57_trampoline -
KERNSTART + amd64_loadaddr()); KERNSTART + amd64_loadaddr());
printf("Calling la57 trampoline at %p, KPML5phys %#lx ...", printf("Calling la57 trampoline at %p, KPML5phys %#lx ...",
la57_tramp, KPML5phys); la57_tramp, KPML5phys);
if (lass_enabled) {
cr4 = rcr4();
load_cr4(cr4 & ~CR4_LASS);
}
la57_tramp(KPML5phys); la57_tramp(KPML5phys);
printf(" alive in la57 mode\n"); printf(" alive in la57 mode\n");
if (lass_enabled) {
cr4 = rcr4();
load_cr4(cr4 | CR4_LASS);
}
} }
static void static void
create_pagetables(vm_paddr_t *firstaddr) create_pagetables(vm_paddr_t *firstaddr)
{ {
pd_entry_t *pd_p; pd_entry_t *pd_p;
pdp_entry_t *pdp_p; pdp_entry_t *pdp_p;
pml4_entry_t *p4_p, *p4d_p; pml4_entry_t *p4_p, *p4d_p;
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