diff options
| author | Tianyu Lan | 2018-07-19 10:40:06 +0200 |
|---|---|---|
| committer | Paolo Bonzini | 2018-08-06 17:59:04 +0200 |
| commit | eb914cfe72f4c948b2318b1381f6d2e08d43b63c (patch) | |
| tree | 7fcb5c02989a8db5ddaf9c1a8ca7a4e9619408f0 /arch/x86/include | |
| parent | x86/kvm: Don't use pvqspinlock code if only 1 vCPU (diff) | |
| download | kernel-qcow2-linux-eb914cfe72f4c948b2318b1381f6d2e08d43b63c.tar.gz kernel-qcow2-linux-eb914cfe72f4c948b2318b1381f6d2e08d43b63c.tar.xz kernel-qcow2-linux-eb914cfe72f4c948b2318b1381f6d2e08d43b63c.zip | |
X86/Hyper-V: Add flush HvFlushGuestPhysicalAddressSpace hypercall support
Hyper-V supports a pv hypercall HvFlushGuestPhysicalAddressSpace to
flush nested VM address space mapping in l1 hypervisor and it's to
reduce overhead of flushing ept tlb among vcpus. This patch is to
implement it.
Signed-off-by: Lan Tianyu <Tianyu.Lan@microsoft.com>
Acked-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/hyperv-tlfs.h | 8 | ||||
| -rw-r--r-- | arch/x86/include/asm/mshyperv.h | 2 |
2 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h index b8c89265baf0..08e24f552030 100644 --- a/arch/x86/include/asm/hyperv-tlfs.h +++ b/arch/x86/include/asm/hyperv-tlfs.h @@ -309,6 +309,7 @@ struct ms_hyperv_tsc_page { #define HV_X64_MSR_REENLIGHTENMENT_CONTROL 0x40000106 /* Nested features (CPUID 0x4000000A) EAX */ +#define HV_X64_NESTED_GUEST_MAPPING_FLUSH BIT(18) #define HV_X64_NESTED_MSR_BITMAP BIT(19) struct hv_reenlightenment_control { @@ -350,6 +351,7 @@ struct hv_tsc_emulation_status { #define HVCALL_SEND_IPI_EX 0x0015 #define HVCALL_POST_MESSAGE 0x005c #define HVCALL_SIGNAL_EVENT 0x005d +#define HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_SPACE 0x00af #define HV_X64_MSR_VP_ASSIST_PAGE_ENABLE 0x00000001 #define HV_X64_MSR_VP_ASSIST_PAGE_ADDRESS_SHIFT 12 @@ -741,6 +743,12 @@ struct ipi_arg_ex { struct hv_vpset vp_set; }; +/* HvFlushGuestPhysicalAddressSpace hypercalls */ +struct hv_guest_mapping_flush { + u64 address_space; + u64 flags; +}; + /* HvFlushVirtualAddressSpace, HvFlushVirtualAddressList hypercalls */ struct hv_tlb_flush { u64 address_space; diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h index 5a7375ed5f7c..2519f5de1e57 100644 --- a/arch/x86/include/asm/mshyperv.h +++ b/arch/x86/include/asm/mshyperv.h @@ -305,6 +305,7 @@ void hyperv_reenlightenment_intr(struct pt_regs *regs); void set_hv_tscchange_cb(void (*cb)(void)); void clear_hv_tscchange_cb(void); void hyperv_stop_tsc_emulation(void); +int hyperv_flush_guest_mapping(u64 as); #ifdef CONFIG_X86_64 void hv_apic_init(void); @@ -324,6 +325,7 @@ static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) { return NULL; } +static inline int hyperv_flush_guest_mapping(u64 as) { return -1; } #endif /* CONFIG_HYPERV */ #ifdef CONFIG_HYPERV_TSCPAGE |