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Anup Patel c695724868
target/riscv: Emulate TIME CSRs for privileged mode 
Currently, TIME CSRs are emulated only for user-only mode. This
patch add TIME CSRs emulation for privileged mode.

For privileged mode, the TIME CSRs will return value provided
by rdtime callback which is registered by QEMU machine/platform
emulation (i.e. CLINT emulation). If rdtime callback is not
available then the monitor (i.e. OpenSBI) will trap-n-emulate
TIME CSRs in software.

We see 25+% performance improvement in hackbench numbers when
TIME CSRs are not trap-n-emulated.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2020-02-27 13:46:36 -08:00
..
alpha
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arm
target/arm: Set MVFR0.FPSP for ARMv5 cpus
2020-02-21 16:07:03 +00:00
cris
cpu: Use cpu_class_set_parent_reset()
2020-01-24 20:59:06 +01:00
hppa
target/hppa: Allow, but diagnose, LDCW aligned only mod 4
2020-01-27 10:49:51 -08:00
i386
Merge branch 'exec_rw_const_v4' of https://github.com/philmd/qemu into HEAD
2020-02-25 13:41:48 +01:00
lm32
cpu: Use cpu_class_set_parent_reset()
2020-01-24 20:59:06 +01:00
m68k
cpu: Use cpu_class_set_parent_reset()
2020-01-24 20:59:06 +01:00
microblaze
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
mips
target/mips: Separate FPU-related helpers into their own file
2020-02-04 08:53:54 +01:00
moxie
cpu: Use cpu_class_set_parent_reset()
2020-01-24 20:59:06 +01:00
nios2
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
openrisc
cpu: Use cpu_class_set_parent_reset()
2020-01-24 20:59:06 +01:00
ppc
target/ppc/cpu.h: Clean up comments in the struct CPUPPCState definition
2020-02-21 09:15:04 +11:00
riscv
target/riscv: Emulate TIME CSRs for privileged mode
2020-02-27 13:46:36 -08:00
s390x
Let cpu_[physical]_memory() calls pass a boolean 'is_write' argument
2020-02-20 14:47:08 +01:00
sh4
cpu: Use cpu_class_set_parent_reset()
2020-01-24 20:59:06 +01:00
sparc
qdev: set properties with device_class_set_props()
2020-01-24 20:59:15 +01:00
tilegx
cpu: Use cpu_class_set_parent_reset()
2020-01-24 20:59:06 +01:00
tricore
cpu: Use cpu_class_set_parent_reset()
2020-01-24 20:59:06 +01:00
unicore32
…
xtensa
cpu: Use cpu_class_set_parent_reset()
2020-01-24 20:59:06 +01:00