mirror of
https://github.com/torvalds/linux.git
synced 2024-11-10 14:11:52 +00:00
2ffd9e33ce
Hyper-V host can suggest us to use hypercall for doing remote TLB flush,
this is supposed to work faster than IPIs.
Implementation details: to do HvFlushVirtualAddress{Space,List} hypercalls
we need to put the input somewhere in memory and we don't really want to
have memory allocation on each call so we pre-allocate per cpu memory areas
on boot.
pv_ops patching is happening very early so we need to separate
hyperv_setup_mmu_ops() and hyper_alloc_mmu().
It is possible and easy to implement local TLB flushing too and there is
even a hint for that. However, I don't see a room for optimization on the
host side as both hypercall and native tlb flush will result in vmexit. The
hint is also not set on modern Hyper-V versions.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Stephen Hemminger <sthemmin@microsoft.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Jork Loeser <Jork.Loeser@microsoft.com>
Cc: K. Y. Srinivasan <kys@microsoft.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Simon Xiao <sixiao@microsoft.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: devel@linuxdriverproject.org
Link: http://lkml.kernel.org/r/20170802160921.21791-8-vkuznets@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
27 lines
649 B
Plaintext
27 lines
649 B
Plaintext
menu "Microsoft Hyper-V guest support"
|
|
|
|
config HYPERV
|
|
tristate "Microsoft Hyper-V client drivers"
|
|
depends on X86 && ACPI && PCI && X86_LOCAL_APIC && HYPERVISOR_GUEST
|
|
select PARAVIRT
|
|
help
|
|
Select this option to run Linux as a Hyper-V client operating
|
|
system.
|
|
|
|
config HYPERV_TSCPAGE
|
|
def_bool HYPERV && X86_64
|
|
|
|
config HYPERV_UTILS
|
|
tristate "Microsoft Hyper-V Utilities driver"
|
|
depends on HYPERV && CONNECTOR && NLS
|
|
help
|
|
Select this option to enable the Hyper-V Utilities.
|
|
|
|
config HYPERV_BALLOON
|
|
tristate "Microsoft Hyper-V Balloon driver"
|
|
depends on HYPERV
|
|
help
|
|
Select this option to enable Hyper-V Balloon driver.
|
|
|
|
endmenu
|