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| author | Andrew Jones <drjones@redhat.com> | 2020-04-03 09:13:15 +0200 |
|---|---|---|
| committer | Andrew Jones <drjones@redhat.com> | 2020-04-03 09:49:57 +0200 |
| commit | c7ca23ce3f571449a58dd8ef86c953e865f9c3f1 (patch) | |
| tree | 9f3e44b0cbd2c157af0dae433b3f739f0c825f28 | |
| parent | 56145eb8f7f6aa66b26e1d1232a5f3dfa7cdd058 (diff) | |
| download | kvm-unit-tests-c7ca23ce3f571449a58dd8ef86c953e865f9c3f1.tar.gz | |
arm64: Provide read/write_sysreg_s
Sometimes we need to test access to system registers which are
missing assembler mnemonics.
Signed-off-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com>
| -rw-r--r-- | lib/arm64/asm/sysreg.h | 11 |
1 files changed, 11 insertions, 0 deletions
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" |