Linux kernel stable tree (mirror) https://git.radix-linux.su/kernel/linux.git/atom?h=v6.7 2023-06-19T07:36:28+00:00 2023-06-19T07:36:28+00:00 Benjamin Gray bgray@linux.ibm.com 2023-06-19T07:36:28+00:00 urn:sha1:a16e472c3546ba0b8a4be265c008d02ef6aed899 Add a utility 'lsdexcr' to print the current DEXCR status. Useful for quickly checking the status such as when debugging test failures or verifying the new default DEXCR does what you want (for userspace at least). Example output: # ./lsdexcr uDEXCR: 04000000 (NPHIE) HDEXCR: 00000000 Effective: 04000000 (NPHIE) SBHE (0): clear (Speculative branch hint enable) IBRTPD (3): clear (Indirect branch recurrent target ...) SRAPD (4): clear (Subroutine return address ...) NPHIE * (5): set (Non-privileged hash instruction enable) PHIE (6): clear (Privileged hash instruction enable) DEXCR[NPHIE] enabled: hashst/hashchk working Signed-off-by: Benjamin Gray <bgray@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230616034846.311705-12-bgray@linux.ibm.com 2023-06-19T07:36:28+00:00 Benjamin Gray bgray@linux.ibm.com 2023-06-19T07:36:27+00:00 urn:sha1:bdb07f35a52f40c461c7da06ddcbaca1950fb9e0 Test the kernel DEXCR[NPHIE] interface and hashchk exception handling. Introduces with it a DEXCR utils library for common DEXCR operations. Volatile is used to prevent the compiler optimising away the signal tests. Signed-off-by: Benjamin Gray <bgray@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230616034846.311705-11-bgray@linux.ibm.com