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system/physmem: handle hugetlb correctly in qemu_ram_remap()

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The list of hwpoison pages used to remap the memory on reset
is based on the backend real page size.
To correctly handle hugetlb, we must mmap(MAP_FIXED) a complete
hugetlb page; hugetlb pages cannot be partially mapped.

Signed-off-by: William Roche <william.roche@oracle.com>
Co-developed-by: David Hildenbrand <david@redhat.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Link: https://lore.kernel.org/r/20250211212707.302391-2-william.roche@oracle.com
Signed-off-by: Peter Xu <peterx@redhat.com>
This commit is contained in:
William Roche 2025-02-11 21:27:05 +00:00 • committed by Peter Xu
parent 1cceedd772
commit c1cda1c5f8
3 changed files with 31 additions and 11 deletions
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2
include/exec/cpu-common.h
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@ -67,7 +67,7 @@ typedef uintptr_t ram_addr_t;
/* memory API */
void qemu_ram_remap(ram_addr_t addr, ram_addr_t length);
void qemu_ram_remap(ram_addr_t addr);
/* This should not be used by devices. */
ram_addr_t qemu_ram_addr_from_host(void *ptr);
ram_addr_t qemu_ram_addr_from_host_nofail(void *ptr);