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| author |   Vitaly Kuznetsov <vkuznets@redhat.com> | 2018-03-20 15:02:08 +0100 |
|---|---|---|
| committer |   Radim Krčmář <rkrcmar@redhat.com> | 2018-03-28 22:47:06 +0200 |
| commit | a46d15cc1ae5af905afac2af4cc0c188c2eb59b0 (patch) | |
| tree | 583e833789b6b1e72a6ecbad409227d9b42c1289 /arch/x86/include/asm/mshyperv.h | |
| parent | x86/kvm: rename HV_X64_MSR_APIC_ASSIST_PAGE to HV_X64_MSR_VP_ASSIST_PAGE (diff) | |
| download | wireguard-linux-a46d15cc1ae5af905afac2af4cc0c188c2eb59b0.tar.xz wireguard-linux-a46d15cc1ae5af905afac2af4cc0c188c2eb59b0.zip | |
x86/hyper-v: allocate and use Virtual Processor Assist Pages
Virtual Processor Assist Pages usage allows us to do optimized EOI
processing for APIC, enable Enlightened VMCS support in KVM and more.
struct hv_vp_assist_page is defined according to the Hyper-V TLFS v5.0b.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | arch/x86/include/asm/mshyperv.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h index 38cfbe9a5794..3f162353f180 100644 --- a/arch/x86/include/asm/mshyperv.h +++ b/arch/x86/include/asm/mshyperv.h @@ -218,6 +218,15 @@ static inline u64 hv_do_rep_hypercall(u16 code, u16 rep_count, u16 varhead_size, */ extern u32 *hv_vp_index; extern u32 hv_max_vp_index; +extern struct hv_vp_assist_page **hv_vp_assist_page; + +static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) +{ + if (!hv_vp_assist_page) + return NULL; + + return hv_vp_assist_page[cpu]; +} /** * hv_cpu_number_to_vp_number() - Map CPU to VP. @@ -254,6 +263,10 @@ static inline void hyperv_setup_mmu_ops(void) {} static inline void set_hv_tscchange_cb(void (*cb)(void)) {} static inline void clear_hv_tscchange_cb(void) {} static inline void hyperv_stop_tsc_emulation(void) {}; +static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu) +{ + return NULL; +} #endif /* CONFIG_HYPERV */ #ifdef CONFIG_HYPERV_TSCPAGE |