As per the latest privilege specification v1.13[1], the sscofpmf
only reserves first 8 bits of hpmeventX. Update the corresponding
masks accordingly.

[1]https://github.com/riscv/riscv-isa-manual/issues/1578

Signed-off-by: Atish Patra <atishp@rivosinc.com>
---
 target/riscv/cpu_bits.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
index 7e3f629356ba..a7b8bcbd0148 100644
--- a/target/riscv/cpu_bits.h
+++ b/target/riscv/cpu_bits.h
@@ -938,8 +938,8 @@ typedef enum RISCVException {
                                             MHPMEVENTH_BIT_VSINH | \
                                             MHPMEVENTH_BIT_VUINH)
 
-#define MHPMEVENT_SSCOF_MASK               _ULL(0xFFFF000000000000)
-#define MHPMEVENT_IDX_MASK                 0xFFFFF
+#define MHPMEVENT_SSCOF_MASK               0xFF00000000000000ULL
+#define MHPMEVENT_IDX_MASK                 (~MHPMEVENT_SSCOF_MASK)
 #define MHPMEVENT_SSCOF_RESVD              16
 
 /* JVT CSR bits */

-- 
2.34.1