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powerpc/powernv: Defer OPAL exception handler registration

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Currently, the OPAL exception vectors are registered before the feature
fixups are processed. This means that the now-firmware-owned vectors
will likely be overwritten by the kernel.

This change moves the exception registration code to an early initcall,
rather than at machine_init time.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Jeremy Kerr 2013-05-01 22:31:50 +00:00 committed by Benjamin Herrenschmidt
parent 73d2fb758e
commit c4463b3738
1 changed files with 13 additions and 2 deletions
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15
arch/powerpc/platforms/powernv/opal.c
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@ -34,7 +34,6 @@ int __init early_init_dt_scan_opal(unsigned long node,
{
const void *basep, *entryp;
unsigned long basesz, entrysz;
u64 glue;
if (depth != 1 || strcmp(uname, "ibm,opal") != 0)
return 0;
@ -61,6 +60,16 @@ int __init early_init_dt_scan_opal(unsigned long node,
printk("OPAL V1 detected !\n");
}
return 1;
}
static int __init opal_register_exception_handlers(void)
{
u64 glue;
if (!(powerpc_firmware_features & FW_FEATURE_OPAL))
return -ENODEV;
/* Hookup some exception handlers. We use the fwnmi area at 0x7000
* to provide the glue space to OPAL
*/
@ -74,9 +83,11 @@ int __init early_init_dt_scan_opal(unsigned long node,
glue += 128;
opal_register_exception_handler(OPAL_SOFTPATCH_HANDLER, 0, glue);
return 1;
return 0;
}
early_initcall(opal_register_exception_handlers);
int opal_get_chars(uint32_t vtermno, char *buf, int count)
{
s64 len, rc;