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| author | Luca Dariz <luca@orpolo.org> | 2023-02-12 18:03:10 +0100 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2023-02-12 18:20:51 +0100 |
| commit | b0d39e2ffda3cdd67d81022f40b2a73518fda6d0 (patch) | |
| tree | 4088d235a55d66546fc6b3920833c31390742c70 | |
| parent | 56b484236e2b8185416576472b54cd1e4ed133ea (diff) | |
| download | gnumach-b0d39e2ffda3cdd67d81022f40b2a73518fda6d0.tar.gz gnumach-b0d39e2ffda3cdd67d81022f40b2a73518fda6d0.tar.bz2 gnumach-b0d39e2ffda3cdd67d81022f40b2a73518fda6d0.zip | |
add L4 kmem cache for x86_64
* i386/intel/pmap.c: allocate the L4 page table from a dedicate kmem
cache instead of the generic kernel map.
Also improve readability of nested ifdef's.
Message-Id: <20230212170313.1501404-4-luca@orpolo.org>
| -rw-r--r-- | i386/intel/pmap.c | 34 |
1 files changed, 19 insertions, 15 deletions
diff --git a/i386/intel/pmap.c b/i386/intel/pmap.c index ccbb03fc..1f1176c4 100644 --- a/i386/intel/pmap.c +++ b/i386/intel/pmap.c @@ -397,13 +397,14 @@ boolean_t cpu_update_needed[NCPUS]; struct pmap kernel_pmap_store; pmap_t kernel_pmap; -struct kmem_cache pmap_cache; /* cache of pmap structures */ -struct kmem_cache pd_cache; /* cache of page directories */ +struct kmem_cache pmap_cache; /* cache of pmap structures */ +struct kmem_cache pd_cache; /* cache of page directories */ #if PAE -struct kmem_cache pdpt_cache; /* cache of page - directory pointer - tables */ -#endif +struct kmem_cache pdpt_cache; /* cache of page directory pointer tables */ +#ifdef __x86_64__ +struct kmem_cache l4_cache; /* cache of L4 tables */ +#endif /* __x86_64__ */ +#endif /* PAE */ boolean_t pmap_debug = FALSE; /* flag for debugging prints */ @@ -1046,7 +1047,12 @@ void pmap_init(void) kmem_cache_init(&pdpt_cache, "pdpt", INTEL_PGBYTES, INTEL_PGBYTES, NULL, KMEM_CACHE_PHYSMEM); -#endif +#ifdef __x86_64__ + kmem_cache_init(&l4_cache, "L4", + INTEL_PGBYTES, INTEL_PGBYTES, NULL, + KMEM_CACHE_PHYSMEM); +#endif /* __x86_64__ */ +#endif /* PAE */ s = (vm_size_t) sizeof(struct pv_entry); kmem_cache_init(&pv_list_cache, "pv_entry", s, 0, NULL, 0); @@ -1287,10 +1293,8 @@ pmap_t pmap_create(vm_size_t size) ); } #ifdef __x86_64__ - // FIXME: use kmem_cache_alloc instead - if (kmem_alloc_wired(kernel_map, - (vm_offset_t *)&p->l4base, INTEL_PGBYTES) - != KERN_SUCCESS) + p->l4base = (pt_entry_t *) kmem_cache_alloc(&l4_cache); + if (p->l4base == NULL) panic("pmap_create"); memset(p->l4base, 0, INTEL_PGBYTES); WRITE_PTE(&p->l4base[0], pa_to_pte(kvtophys((vm_offset_t) p->pdpbase)) | INTEL_PTE_VALID | INTEL_PTE_WRITE | INTEL_PTE_USER); @@ -1426,16 +1430,16 @@ void pmap_destroy(pmap_t p) pmap_set_page_readwrite(p->l4base); pmap_set_page_readwrite(p->user_l4base); pmap_set_page_readwrite(p->user_pdpbase); -#endif +#endif /* __x86_64__ */ pmap_set_page_readwrite(p->pdpbase); #endif /* MACH_PV_PAGETABLES */ #ifdef __x86_64__ - kmem_free(kernel_map, (vm_offset_t)p->l4base, INTEL_PGBYTES); + kmem_cache_free(&l4_cache, (vm_offset_t) p->l4base); #ifdef MACH_PV_PAGETABLES kmem_free(kernel_map, (vm_offset_t)p->user_l4base, INTEL_PGBYTES); kmem_free(kernel_map, (vm_offset_t)p->user_pdpbase, INTEL_PGBYTES); -#endif -#endif +#endif /* MACH_PV_PAGETABLES */ +#endif /* __x86_64__ */ kmem_cache_free(&pdpt_cache, (vm_offset_t) p->pdpbase); #endif /* PAE */ kmem_cache_free(&pmap_cache, (vm_offset_t) p); |