diff options
| author | Suraj Jitindar Singh <sjitindarsingh@gmail.com> | 2019-11-28 14:46:54 +0100 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2019-12-17 10:39:48 +1100 |
| commit | 5d62725b2fefd59abf7225d620f7092fd34b8e11 (patch) | |
| tree | ea19cd6b909fdbadccafe83f993120d096668aed /include/hw | |
| parent | 2661f6ab2ba1694d7c19efdd622378817cb874ea (diff) | |
target/ppc: Implement the VTB for HV access
The virtual timebase register (VTB) is a 64-bit register which
increments at the same rate as the timebase register, present on POWER8
and later processors.
The register is able to be read/written by the hypervisor and read by
the supervisor. All other accesses are illegal.
Currently the VTB is just an alias for the timebase (TB) register.
Implement the VTB so that is can be read/written independent of the TB.
Make use of the existing method for accessing timebase facilities where
by the compensation is stored and used to compute the value on reads/is
updated on writes.
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
[ clg: rebased on current ppc tree ]
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20191128134700.16091-2-clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'include/hw')
| -rw-r--r-- | include/hw/ppc/ppc.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/hw/ppc/ppc.h b/include/hw/ppc/ppc.h index 89e1dd065a..d7a95608f6 100644 --- a/include/hw/ppc/ppc.h +++ b/include/hw/ppc/ppc.h @@ -24,6 +24,7 @@ struct ppc_tb_t { /* Time base management */ int64_t tb_offset; /* Compensation */ int64_t atb_offset; /* Compensation */ + int64_t vtb_offset; uint32_t tb_freq; /* TB frequency */ /* Decrementer management */ uint64_t decr_next; /* Tick for next decr interrupt */ |