Attachment 249803 Details for Bug 278233 – bug fix: support non-contiguous memory in PHYS_IN_DMAP and VIRT_IN_DMAP

[patch] bug fix: support non-contiguous memory in PHYS_IN_DMAP and VIRT_IN_DMAP

file_278233.patch (text/plain), 3.71 KB, created by Zeev Zilberman on 2024-04-07 13:06:57 UTC

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Creator: Zeev Zilberman

Created: 2024-04-07 13:06:57 UTC

Size: 3.71 KB

patch

obsolete

>diff --git a/sys/arm64/arm64/pmap.c b/sys/arm64/arm64/pmap.c
>index ba72f1dac8d0..e44d07e25002 100644
>--- a/sys/arm64/arm64/pmap.c
>+++ b/sys/arm64/arm64/pmap.c
>@@ -342,6 +342,7 @@ struct pv_chunks_list __exclusive_cache_line pv_chunks[PMAP_MEMDOM];
> vm_paddr_t dmap_phys_base;     /* The start of the dmap region */
> vm_paddr_t dmap_phys_max;      /* The limit of the dmap region */
> vm_offset_t dmap_max_addr;     /* The virtual address limit of the dmap */
>+struct direct_map_desc dmap_desc[MAX_DMAP_ENTRIES];
> 
> extern pt_entry_t pagetable_l0_ttbr1[];
> 
>@@ -1156,6 +1157,7 @@ pmap_bootstrap_l3_page(struct pmap_bootstrap_state *state, int i)
> static void
> pmap_bootstrap_dmap(vm_paddr_t min_pa)
> {
>+       int dmap_desc_idx;
>        int i;
> 
>        dmap_phys_base = min_pa & ~L1_OFFSET;
>@@ -1166,6 +1168,12 @@ pmap_bootstrap_dmap(vm_paddr_t min_pa)
>                bs_state.pa = physmap[i] & ~L3_OFFSET;
>                bs_state.va = bs_state.pa - dmap_phys_base + DMAP_MIN_ADDRESS;
> 
>+               dmap_desc_idx = i / 2;
>+               dmap_desc[dmap_desc_idx].pa_start = bs_state.pa;
>+               dmap_desc[dmap_desc_idx].va_start = bs_state.va;
>+               dmap_desc[dmap_desc_idx].size = physmap[i + 1] - dmap_desc[dmap_desc_idx].pa_start;
>+               dmap_desc[dmap_desc_idx].flags = DMAP_FLAG_VALID;
>+
>                /* Create L3 mappings at the start of the region */
>                if ((bs_state.pa & L2_OFFSET) != 0)
>                        pmap_bootstrap_l3_page(&bs_state, i);
>diff --git a/sys/arm64/include/vmparam.h b/sys/arm64/include/vmparam.h
>index d5d4a5691f37..b2775482c6c6 100644
>--- a/sys/arm64/include/vmparam.h
>+++ b/sys/arm64/include/vmparam.h
>@@ -178,6 +178,21 @@
>  * VM_MIN_USER_ADDRESS and VM_MAX_USER_ADDRESS define the start and end of the
>  * user address space.
>  */
>+
>+#ifndef LOCORE
>+#define        DMAP_FLAG_VALID         (0x1)
>+
>+#define        MAX_DMAP_ENTRIES        64
>+struct direct_map_desc {
>+       uint64_t        pa_start;
>+       uint64_t        va_start;
>+       uint64_t        size;
>+       uint64_t        flags;
>+};
>+
>+extern struct direct_map_desc dmap_desc[];
>+#endif
>+
> #define        VM_MIN_ADDRESS          (0x0000000000000000UL)
> #define        VM_MAX_ADDRESS          (0xffffffffffffffffUL)
> 
>@@ -223,12 +238,41 @@
> #define        DMAP_MIN_PHYSADDR       (dmap_phys_base)
> #define        DMAP_MAX_PHYSADDR       (dmap_phys_max)
> 
>-/* True if pa is in the dmap range */
>-#define        PHYS_IN_DMAP(pa)        ((pa) >= DMAP_MIN_PHYSADDR && \
>-    (pa) < DMAP_MAX_PHYSADDR)
>-/* True if va is in the dmap range */
>-#define        VIRT_IN_DMAP(va)        ((va) >= DMAP_MIN_ADDRESS && \
>-    (va) < (dmap_max_addr))
>+#ifndef LOCORE
>+static inline int
>+PHYS_IN_DMAP(uint64_t pa)
>+{
>+       struct direct_map_desc *desc;
>+       int a;
>+
>+       for (a = 0; a < MAX_DMAP_ENTRIES; a++) {
>+               desc = &dmap_desc[a];
>+               if (desc->flags == DMAP_FLAG_VALID) {
>+                       if (pa >= desc->pa_start && pa <= desc->pa_start + desc->size)
>+                               return (1);
>+               }
>+       }
>+
>+       return (0);
>+}
>+
>+static inline int
>+VIRT_IN_DMAP(uint64_t va)
>+{
>+       struct direct_map_desc *desc;
>+       int a;
>+
>+       for (a = 0; a < MAX_DMAP_ENTRIES; a++) {
>+               desc = &dmap_desc[a];
>+               if (desc->flags == DMAP_FLAG_VALID) {
>+                       if (va >= desc->va_start && va <= desc->va_start + desc->size)
>+                               return (1);
>+               }
>+       }
>+
>+       return (0);
>+}
>+#endif
> 
> #define        PMAP_HAS_DMAP   1
> #define        PHYS_TO_DMAP(pa)                                                \

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Attachments on bug 278233: 249802 | 249803