From: Andrew Jones <drjo...@redhat.com> Sometimes we need to test access to system registers which are missing assembler mnemonics.
Signed-off-by: Andrew Jones <drjo...@redhat.com> Reviewed-by: Alexandru Elisei <alexandru.eli...@arm.com> --- lib/arm64/asm/sysreg.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/lib/arm64/asm/sysreg.h b/lib/arm64/asm/sysreg.h index a03830b..a45eebd 100644 --- a/lib/arm64/asm/sysreg.h +++ b/lib/arm64/asm/sysreg.h @@ -38,6 +38,17 @@ asm volatile("msr " xstr(r) ", %x0" : : "rZ" (__val)); \ } while (0) +#define read_sysreg_s(r) ({ \ + u64 __val; \ + asm volatile("mrs_s %0, " xstr(r) : "=r" (__val)); \ + __val; \ +}) + +#define write_sysreg_s(v, r) do { \ + u64 __val = (u64)v; \ + asm volatile("msr_s " xstr(r) ", %x0" : : "rZ" (__val));\ +} while (0) + asm( " .irp num,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30\n" " .equ .L__reg_num_x\\num, \\num\n" -- 2.20.1 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm