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fb: do WC in shared mappings instead of private

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Matheus
2026-07-17 16:48:03 -03:00
parent 7ab18babf4
commit 6f0596b00f
1 changed files with 2 additions and 2 deletions
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kernel-src/io/fb.c
+2 -2
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@@ -144,7 +144,7 @@ static int mmap(int minor, void *addr, uintmax_t offset, int flags) {
if (flags & V_FFLAGS_SHARED) { if (flags & V_FFLAGS_SHARED) {
// make sure offset is ALWAYS page aligned when doing a shared mapping // make sure offset is ALWAYS page aligned when doing a shared mapping
__assert((offset % PAGE_SIZE) == 0); __assert((offset % PAGE_SIZE) == 0);
return arch_mmu_map(current_mm_context()->pagetable, FROM_HHDM((void *)((uintptr_t)fbs[minor]->address + offset)), addr, mm_vnode_flags_to_mmu_flags(flags)) ? 0 : ENOMEM; return arch_mmu_map(current_mm_context()->pagetable, FROM_HHDM((void *)((uintptr_t)fbs[minor]->address + offset)), addr, mm_vnode_flags_to_mmu_flags(flags) | ARCH_MMU_FLAGS_WC) ? 0 : ENOMEM;
} else { } else {
size_t size = offset + PAGE_SIZE < end ? PAGE_SIZE : end - offset; size_t size = offset + PAGE_SIZE < end ? PAGE_SIZE : end - offset;
paddr = mm_alloc_page(MEMORY_SECTION_DEFAULT); paddr = mm_alloc_page(MEMORY_SECTION_DEFAULT);
@@ -153,7 +153,7 @@ static int mmap(int minor, void *addr, uintmax_t offset, int flags) {
memcpy(MAKE_HHDM(paddr), (void *)((uintptr_t)fbs[minor]->address + offset), size); memcpy(MAKE_HHDM(paddr), (void *)((uintptr_t)fbs[minor]->address + offset), size);
if (arch_mmu_map(current_mm_context()->pagetable, paddr, addr, mm_vnode_flags_to_mmu_flags(flags) | ARCH_MMU_FLAGS_WC) == false) { if (arch_mmu_map(current_mm_context()->pagetable, paddr, addr, mm_vnode_flags_to_mmu_flags(flags)) == false) {
mm_release_page(paddr); mm_release_page(paddr);
return ENOMEM; return ENOMEM;
} }