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firmware: fw_cfg register offsets on supported architectures only 

Refrain from defining default fw_cfg register offsets on
unsupported architectures -- throw an error instead. If
QEMU were to add fw_cfg support on additional architectures,
we should add them to the FW_CFG_SYSFS depends statement in
drivers/firmware/Kconfig, and provide default values for
register offsets in drivers/firmware/qemu_fw_cfg.c at that
time.

Suggested-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Gabriel Somlo <somlo@cmu.edu>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gabriel Somlo 2016-02-22 16:18:18 -05:00 committed by Greg Kroah-Hartman
parent f55532a0c0
commit 00411b7b1e
1 changed files with 1 additions and 3 deletions
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4
drivers/firmware/qemu_fw_cfg.c
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@ -109,9 +109,7 @@ static void fw_cfg_io_cleanup(void)
# define FW_CFG_CTRL_OFF 0x00
# define FW_CFG_DATA_OFF 0x01
# else
# warning "QEMU FW_CFG may not be available on this architecture!"
# define FW_CFG_CTRL_OFF 0x00
# define FW_CFG_DATA_OFF 0x01
# error "QEMU FW_CFG not available on this architecture!"
# endif
#endif