This series implements Sstc extension[1] which was ratified recently. The first patch is a prepartory patches while PATCH 2 adds stimecmp support while PATCH 3 adds vstimecmp support. This series is based on on top of upstream commit (faee5441a038).
The series can also be found at https://github.com/atishp04/qemu/tree/sstc_v9 It is tested on RV32 & RV64 with latest OpenSBI & Linux kernel[2] patches. Changes from v8->v9: 1. Updated alignment of few lines. 2. Improved predicate functions for sstc. Changes from v7->v8: 1. Removed redundant blank lines. 2. Invoke smode & hmode predicate function from sstc related predicate functions. Changes from v6->v7: 1. Replaced g_malloc0 with g_new0. 2. Removed the over allocation for the timers. Changes from v5->v6: 1. Rebased on top of the latest HEAD commit. Changes from v4->v5: 1. Removed any ordering related flags and emulate the hardware more closely. Changes from v3->v4: 1. Added [v]stimecmp_wr_done to the corresponding vmstate strucuture. Changes from v2->v3: 1. Dropped generic migration code improvement patches. 2. Removed the order constraints while updating stimecmp/vstimecmp. Changes from v1->v2: 1. Rebased on the latest upstream commit. 2. Replaced PATCH 1 with another patch where mtimer/timecmp is moved from CPU to ACLINT. 3. Added ACLINT migration support. [1] https://drive.google.com/file/d/1m84Re2yK8m_vbW7TspvevCDR82MOBaSX/view [2] https://github.com/atishp04/linux/tree/sstc_v8 Atish Patra (3): hw/intc: Move mtimer/mtimecmp to aclint target/riscv: Add stimecmp support target/riscv: Add vstimecmp support hw/intc/riscv_aclint.c | 41 +++++--- hw/timer/ibex_timer.c | 18 ++-- include/hw/intc/riscv_aclint.h | 2 + include/hw/timer/ibex_timer.h | 2 + target/riscv/cpu.c | 9 ++ target/riscv/cpu.h | 11 ++- target/riscv/cpu_bits.h | 8 ++ target/riscv/cpu_helper.c | 11 ++- target/riscv/csr.c | 168 +++++++++++++++++++++++++++++++++ target/riscv/machine.c | 7 +- target/riscv/meson.build | 3 +- target/riscv/time_helper.c | 114 ++++++++++++++++++++++ target/riscv/time_helper.h | 30 ++++++ 13 files changed, 392 insertions(+), 32 deletions(-) create mode 100644 target/riscv/time_helper.c create mode 100644 target/riscv/time_helper.h -- 2.25.1
