| cdc118f8 | 12-Sep-2024 |
Bibo Mao <maobibo@loongson.cn> |
LoongArch: KVM: Enable paravirt feature control from VMM
Export kernel paravirt features to user space, so that VMM can control
each single paravirt feature. By default paravirt features will be the
LoongArch: KVM: Enable paravirt feature control from VMM
Export kernel paravirt features to user space, so that VMM can control
each single paravirt feature. By default paravirt features will be the
same with kvm supported features if VMM does not set it.
Also a new feature KVM_FEATURE_VIRT_EXTIOI is added which can be set
from user space. This feature indicates that the virt EIOINTC can route
interrupts to 256 vCPUs, rather than 4 vCPUs like with real HW.
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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| f4e40ea9 | 12-Sep-2024 |
Song Gao <gaosong@loongson.cn> |
LoongArch: KVM: Add PMU support for guest
On LoongArch, the host and guest have their own PMU CSRs registers and
they share PMU hardware resources. A set of PMU CSRs consists of a CTRL
register and
LoongArch: KVM: Add PMU support for guest
On LoongArch, the host and guest have their own PMU CSRs registers and
they share PMU hardware resources. A set of PMU CSRs consists of a CTRL
register and a CNTR register. We can set which PMU CSRs are used by the
guest by writing to the GCFG register [24:26] bits.
On KVM side:
- Save the host PMU CSRs into structure kvm_context.
- If the host supports the PMU feature.
- When entering guest mode, save the host PMU CSRs and restore the guest PMU CSRs.
- When exiting guest mode, save the guest PMU CSRs and restore the host PMU CSRs.
Reviewed-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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| acc7f20d | 11-Sep-2024 |
Bibo Mao <maobibo@loongson.cn> |
LoongArch: KVM: Add vm migration support for LBT registers
Every vcpu has separate LBT registers. And there are four scr registers,
one flags and ftop register for LBT extension. When VM migrates, V
LoongArch: KVM: Add vm migration support for LBT registers
Every vcpu has separate LBT registers. And there are four scr registers,
one flags and ftop register for LBT extension. When VM migrates, VMM
needs to get LBT registers for every vcpu.
Here macro KVM_REG_LOONGARCH_LBT is added for new vcpu lbt register type,
the following macro is added to get/put LBT registers.
KVM_REG_LOONGARCH_LBT_SCR0
KVM_REG_LOONGARCH_LBT_SCR1
KVM_REG_LOONGARCH_LBT_SCR2
KVM_REG_LOONGARCH_LBT_SCR3
KVM_REG_LOONGARCH_LBT_EFLAGS
KVM_REG_LOONGARCH_LBT_FTOP
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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