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-rw-r--r--arch/x86/mm/init.c92
1 files changed, 35 insertions, 57 deletions
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 679893ea5e..eb503f53c3 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -7,6 +7,7 @@
#include <linux/swapops.h>
#include <linux/kmemleak.h>
#include <linux/sched/task.h>
+#include <linux/execmem.h>
#include <asm/set_memory.h>
#include <asm/cpu_device_id.h>
@@ -261,21 +262,17 @@ static void __init probe_page_size_mask(void)
}
}
-#define INTEL_MATCH(_model) { .vendor = X86_VENDOR_INTEL, \
- .family = 6, \
- .model = _model, \
- }
/*
* INVLPG may not properly flush Global entries
* on these CPUs when PCIDs are enabled.
*/
static const struct x86_cpu_id invlpg_miss_ids[] = {
- INTEL_MATCH(INTEL_FAM6_ALDERLAKE ),
- INTEL_MATCH(INTEL_FAM6_ALDERLAKE_L ),
- INTEL_MATCH(INTEL_FAM6_ATOM_GRACEMONT ),
- INTEL_MATCH(INTEL_FAM6_RAPTORLAKE ),
- INTEL_MATCH(INTEL_FAM6_RAPTORLAKE_P),
- INTEL_MATCH(INTEL_FAM6_RAPTORLAKE_S),
+ X86_MATCH_VFM(INTEL_ALDERLAKE, 0),
+ X86_MATCH_VFM(INTEL_ALDERLAKE_L, 0),
+ X86_MATCH_VFM(INTEL_ATOM_GRACEMONT, 0),
+ X86_MATCH_VFM(INTEL_RAPTORLAKE, 0),
+ X86_MATCH_VFM(INTEL_RAPTORLAKE_P, 0),
+ X86_MATCH_VFM(INTEL_RAPTORLAKE_S, 0),
{}
};
@@ -990,53 +987,6 @@ void __init free_initrd_mem(unsigned long start, unsigned long end)
}
#endif
-/*
- * Calculate the precise size of the DMA zone (first 16 MB of RAM),
- * and pass it to the MM layer - to help it set zone watermarks more
- * accurately.
- *
- * Done on 64-bit systems only for the time being, although 32-bit systems
- * might benefit from this as well.
- */
-void __init memblock_find_dma_reserve(void)
-{
-#ifdef CONFIG_X86_64
- u64 nr_pages = 0, nr_free_pages = 0;
- unsigned long start_pfn, end_pfn;
- phys_addr_t start_addr, end_addr;
- int i;
- u64 u;
-
- /*
- * Iterate over all memory ranges (free and reserved ones alike),
- * to calculate the total number of pages in the first 16 MB of RAM:
- */
- nr_pages = 0;
- for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, NULL) {
- start_pfn = min(start_pfn, MAX_DMA_PFN);
- end_pfn = min(end_pfn, MAX_DMA_PFN);
-
- nr_pages += end_pfn - start_pfn;
- }
-
- /*
- * Iterate over free memory ranges to calculate the number of free
- * pages in the DMA zone, while not counting potential partial
- * pages at the beginning or the end of the range:
- */
- nr_free_pages = 0;
- for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start_addr, &end_addr, NULL) {
- start_pfn = min_t(unsigned long, PFN_UP(start_addr), MAX_DMA_PFN);
- end_pfn = min_t(unsigned long, PFN_DOWN(end_addr), MAX_DMA_PFN);
-
- if (start_pfn < end_pfn)
- nr_free_pages += end_pfn - start_pfn;
- }
-
- set_dma_reserve(nr_pages - nr_free_pages);
-#endif
-}
-
void __init zone_sizes_init(void)
{
unsigned long max_zone_pfns[MAX_NR_ZONES];
@@ -1099,3 +1049,31 @@ unsigned long arch_max_swapfile_size(void)
return pages;
}
#endif
+
+#ifdef CONFIG_EXECMEM
+static struct execmem_info execmem_info __ro_after_init;
+
+struct execmem_info __init *execmem_arch_setup(void)
+{
+ unsigned long start, offset = 0;
+
+ if (kaslr_enabled())
+ offset = get_random_u32_inclusive(1, 1024) * PAGE_SIZE;
+
+ start = MODULES_VADDR + offset;
+
+ execmem_info = (struct execmem_info){
+ .ranges = {
+ [EXECMEM_DEFAULT] = {
+ .flags = EXECMEM_KASAN_SHADOW,
+ .start = start,
+ .end = MODULES_END,
+ .pgprot = PAGE_KERNEL,
+ .alignment = MODULE_ALIGN,
+ },
+ },
+ };
+
+ return &execmem_info;
+}
+#endif /* CONFIG_EXECMEM */