Loongson Binary Translation (LBT) is used to accelerate binary
translation. LBT feature is added in kvm mode, not supported in TCG
mode since it is not emulated.
Here lbt=on/off property is added to parse command line to
enable/disable lbt feature. Also fix registers relative lbt are saved
and restored during migration.
---
v4 ... v5:
1. Define structure element eflags in structure LoongArchBT as
uint32_t; in kernel eflags is defined as u64, however with
ptrace and gdb interface it is defined u32, here defined as
uint32_t to keep consistent from user view.
2. sync patch with latest qemu version.
v3 ... v4:
1. Verify and enable LBT feature in function kvm_arch_init_vcpu()
rather than loongarch_cpu_post_init(), since LBT feature is only
effective in kvm mode and function kvm_feature_supported() can be
defined as static.
2. Define structure element ftop in structure LoongArchBT as uint32_t
to keep consist with kernel and real HW.
v2 ... v3:
1. Property lbt is added only if kvm is enabled
2. Use feature variable lbt with OnOffAuto type, rather than feature
bitmap flags default_features and forced_features
v1 ... v2:
1. Add LBT register saving and restoring in vmstate
2. Add two pseudo feature flags: default_features and forced_features
---
Bibo Mao (2):
target/loongarch: Add loongson binary translation feature
target/loongarch: Implement lbt registers save/restore function
target/loongarch/cpu.c | 24 ++++++
target/loongarch/cpu.h | 18 ++++
target/loongarch/kvm/kvm.c | 119 +++++++++++++++++++++++++-
target/loongarch/loongarch-qmp-cmds.c | 2 +-
target/loongarch/machine.c | 24 ++++++
5 files changed, 185 insertions(+), 2 deletions(-)
base-commit: 3b14a767eaca3df5534a162851f04787b363670e
--
2.39.3
