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| author | Jan Kiszka <jan.kiszka@siemens.com> | 2013-09-02 18:43:30 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2013-09-05 18:11:43 +0200 |
| commit | 3bb28b7208b349e7a1b326e3c6ef9efac1d462bf (patch) | |
| tree | 8235f8e0b7c426f1cda7ae4e98de47709491ce27 /include/exec/ioport.h | |
| parent | 88266249701032211c1d7449460d063fbc01bf12 (diff) | |
| download | qemu-3bb28b7208b349e7a1b326e3c6ef9efac1d462bf.tar.gz | |
memory: Provide separate handling of unassigned io ports accesses
Accesses to unassigned io ports shall return -1 on read and be ignored
on write. Ensure these properties via dedicated ops, decoupling us from
the memory core's handling of unassigned accesses.
Cc: qemu-stable@nongnu.org
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include/exec/ioport.h')
| -rw-r--r-- | include/exec/ioport.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/exec/ioport.h b/include/exec/ioport.h index bdd4e964eb..b3848be684 100644 --- a/include/exec/ioport.h +++ b/include/exec/ioport.h @@ -45,6 +45,10 @@ typedef struct MemoryRegionPortio { #define PORTIO_END_OF_LIST() { } +#ifndef CONFIG_USER_ONLY +extern const MemoryRegionOps unassigned_io_ops; +#endif + void cpu_outb(pio_addr_t addr, uint8_t val); void cpu_outw(pio_addr_t addr, uint16_t val); void cpu_outl(pio_addr_t addr, uint32_t val); |