Re: [PATCH v8 2/2] lib: checksum: Use aligned accesses for ip_fast_csum and csum_ipv6_magic tests

[John David Anglin]

On 2024-02-14 8:58 p.m., Guenter Roeck wrote:
> Specifically: Yes, the carry/borrow bits should be restored. Question is
> if the Linux kernel's interrupt handler doesn't restore the carry bits
> or if the problem is on the qemu side.
The carry/borrow bits in the PSW should be saved and restored by the save_specials
and rest_specials macros.  They are defined in arch/parisc/include/asm/assembly.h.

However, it appears the tophys macro might clobber the carry bits before they
are saved in intr_save.

Dave

--
John David Anglin  dave.anglin@xxxxxxxx