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| author | Bibo Mao <maobibo@loongson.cn> | 2024-07-09 16:25:51 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2024-07-09 16:25:51 +0800 |
| commit | b4ba157044ea433a66126603ad7140e12dbc794b (patch) | |
| tree | 57e1e54b36213e391cea34a7aebc7a9883164b76 /arch/loongarch/include/asm/kvm_host.h | |
| parent | d7ad41a31d91abd01a4d9b040074d808899636ea (diff) | |
LoongArch: KVM: Add PV steal time support in host side
Add ParaVirt steal time feature in host side, VM can search supported
features provided by KVM hypervisor, a feature KVM_FEATURE_STEAL_TIME
is added here. Like x86, steal time structure is saved in guest memory,
one hypercall function KVM_HCALL_FUNC_NOTIFY is added to notify KVM to
enable this feature.
One CPU attr ioctl command KVM_LOONGARCH_VCPU_PVTIME_CTRL is added to
save and restore the base address of steal time structure when a VM is
migrated.
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/include/asm/kvm_host.h')
| -rw-r--r-- | arch/loongarch/include/asm/kvm_host.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/kvm_host.h b/arch/loongarch/include/asm/kvm_host.h index 309ce329b747..fe38f98eeff8 100644 --- a/arch/loongarch/include/asm/kvm_host.h +++ b/arch/loongarch/include/asm/kvm_host.h @@ -31,6 +31,7 @@ #define KVM_HALT_POLL_NS_DEFAULT 500000 #define KVM_REQ_TLB_FLUSH_GPA KVM_ARCH_REQ(0) +#define KVM_REQ_STEAL_UPDATE KVM_ARCH_REQ(1) #define KVM_GUESTDBG_SW_BP_MASK \ (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP) @@ -206,6 +207,13 @@ struct kvm_vcpu_arch { struct kvm_mp_state mp_state; /* cpucfg */ u32 cpucfg[KVM_MAX_CPUCFG_REGS]; + + /* paravirt steal time */ + struct { + u64 guest_addr; + u64 last_steal; + struct gfn_to_hva_cache cache; + } st; }; static inline unsigned long readl_sw_gcsr(struct loongarch_csrs *csr, int reg) |