xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

X86/Hyper-V: Add flush HvFlushGuestPhysicalAddressSpace hypercall support

Browse Source 
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>
This commit is contained in:
Tianyu Lan
2018-07-19 08:40:06 +00:00
committed by Paolo Bonzini
parent 3553ae5690
commit eb914cfe72
4 changed files with 64 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
arch/x86/include/asm/hyperv-tlfs.h
View File

@@ -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;