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softmmu/physmem: Fix qemu_ram_remap() to handle shared anonymous memory

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RAM_SHARED now also properly indicates shared anonymous memory. Let's check
that flag for anonymous memory as well, to restore the proper mapping.

Fixes: 06329ccecfa0 ("mem: add share parameter to memory-backend-ram")
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210406080126.24010-4-david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
David Hildenbrand 2021-04-06 10:01:26 +02:00 committed by Paolo Bonzini
parent cdfa56c551
commit dbb92eea38
1 changed files with 3 additions and 3 deletions
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6
softmmu/physmem.c
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@ -2243,13 +2243,13 @@ void qemu_ram_remap(ram_addr_t addr, ram_addr_t length)
abort(); abort();
} else { } else {
flags = MAP_FIXED; flags = MAP_FIXED;
flags |= block->flags & RAM_SHARED ?
MAP_SHARED : MAP_PRIVATE;
if (block->fd >= 0) { if (block->fd >= 0) {
flags |= (block->flags & RAM_SHARED ?
MAP_SHARED : MAP_PRIVATE);
area = mmap(vaddr, length, PROT_READ | PROT_WRITE, area = mmap(vaddr, length, PROT_READ | PROT_WRITE,
flags, block->fd, offset); flags, block->fd, offset);
} else { } else {
flags |= MAP_PRIVATE | MAP_ANONYMOUS; flags |= MAP_ANONYMOUS;
area = mmap(vaddr, length, PROT_READ | PROT_WRITE, area = mmap(vaddr, length, PROT_READ | PROT_WRITE,
flags, -1, 0); flags, -1, 0);
} }