LoongArch: KVM: Fix PMU pass-through issue if VM exits to host finally

In function kvm_pre_enter_guest(), it prepares to enter guest and check
whether there are pending signals or events. And it wil

LoongArch: KVM: Fix PMU pass-through issue if VM exits to host finally

In function kvm_pre_enter_guest(), it prepares to enter guest and check
whether there are pending signals or events. And it will not enter guest
if there are, PMU pass-through preparation for guest should be cancelled
and host should own PMU hardware.

Cc: [email protected]
Fixes: f4e40ea9f78f ("LoongArch: KVM: Add PMU support for guest")
Signed-off-by: Bibo Mao <[email protected]>
Signed-off-by: Huacai Chen <[email protected]>

show more ...

LoongArch: KVM: Fully clear some CSRs when VM reboot

Some registers such as LOONGARCH_CSR_ESTAT and LOONGARCH_CSR_GINTC are
partly cleared with function _kvm_setcsr(). This comes from the hardware
s

LoongArch: KVM: Fully clear some CSRs when VM reboot

Some registers such as LOONGARCH_CSR_ESTAT and LOONGARCH_CSR_GINTC are
partly cleared with function _kvm_setcsr(). This comes from the hardware
specification, some bits are read only in VM mode, and however they can
be written in host mode. So they are partly cleared in VM mode, and can
be fully cleared in host mode.

These read only bits show pending interrupt or exception status. When VM
reset, the read-only bits should be cleared, otherwise vCPU will receive
unknown interrupts in boot stage.

Here registers LOONGARCH_CSR_ESTAT/LOONGARCH_CSR_GINTC are fully cleared
in ioctl KVM_REG_LOONGARCH_VCPU_RESET vCPU reset path.

Cc: [email protected]
Signed-off-by: Bibo Mao <[email protected]>
Signed-off-by: Huacai Chen <[email protected]>

show more ...

LoongArch: KVM: Fix multiple typos of KVM code

Fix multiple typos inside arch/loongarch/kvm.

Cc: [email protected]
Reviewed-by: Yuli Wang <[email protected]>
Reviewed-by: Bibo Mao <maobib

LoongArch: KVM: Fix multiple typos of KVM code

Fix multiple typos inside arch/loongarch/kvm.

Cc: [email protected]
Reviewed-by: Yuli Wang <[email protected]>
Reviewed-by: Bibo Mao <[email protected]>
Signed-off-by: Yulong Han <[email protected]>
Signed-off-by: Huacai Chen <[email protected]>

show more ...