| Message ID | 1610729929-188490-4-git-send-email-john.garry@huawei.com (mailing list archive) |
|---|---|
| State | RFC |
| Headers | show |
| Series | Fix arm64 crash for accessing unmapped IO port regions (reboot) | expand |
diff --git a/kernel/resource.c b/kernel/resource.c index 3ae2f56cc79d..d191c4d796c7 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -29,7 +29,7 @@ struct resource ioport_resource = { .name = "PCI IO", - .start = 0, + .start = IO_SPACE_BASE, .end = IO_SPACE_LIMIT, .flags = IORESOURCE_IO, };
Make IO space base address to be configurable through IO_SPACE_BASE. This will allow architectures which do not natively support IO ports - like arm64 - to harden against legacy ISA-based drivers which use hardcoded addresses to access IO ports. Any attempts for these drivers to request a resource region will now fail for architectures with set IO_SPACE_BASE above legacy ISA IO port region (0xffff). Signed-off-by: John Garry <john.garry@huawei.com> --- kernel/resource.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)