| Message ID | 20191206172724.947-2-eric.auger@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | KVM: arm64: PMUv3 Event Counter Tests | expand |
Hi, On 12/6/19 5:27 PM, Eric Auger wrote: > From: Andrew Jones <drjones@redhat.com> > > Sometimes we need to test access to system registers which are > missing assembler mnemonics. > > Signed-off-by: Andrew Jones <drjones@redhat.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" That's exactly the code that I wrote for my EL2 series :) Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com> Thanks, Alex
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"