Vitaly Kuznetsov 2ffd9e33ce x86/hyper-v: Use hypercall for remote TLB flush ...

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>

2017-08-10 20:16:44 +02:00

..

boot

x86/boot: Disable the address-of-packed-member compiler warning

2017-07-28 08:39:08 +02:00

configs

x86/defconfig: Remove stale, old Kconfig options

2017-07-20 10:28:19 +02:00

crypto

Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

2017-07-14 22:49:50 -07:00

entry

x86: irq: Define a global vector for nested posted interrupts

2017-07-26 18:57:45 +02:00

events

perf/x86/intel/uncore: Fix missing marker for skx_uncore_cha_extra_regs

2017-07-24 11:13:18 +02:00

hyperv

x86/hyper-v: Use hypercall for remote TLB flush

2017-08-10 20:16:44 +02:00

ia32

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>

2017-03-02 08:42:36 +01:00

include

x86/hyper-v: Use hypercall for remote TLB flush

2017-08-10 20:16:44 +02:00

kernel

x86/hyper-v: Use hypercall for remote TLB flush

2017-08-10 20:16:44 +02:00

kvm

KVM: nVMX: Fix interrupt window request with "Acknowledge interrupt on exit"

2017-08-03 15:38:11 +02:00

lguest

Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2017-05-01 20:51:12 -07:00

lib

include/linux/string.h: add the option of fortified string.h functions

2017-07-12 16:26:03 -07:00

math-emu

x86/fpu/math-emu: Avoid bogus -Wint-in-bool-context warning

2017-07-20 10:46:24 +02:00

mm

x86/mmap: properly account for stack randomization in mmap_base

2017-07-12 16:26:03 -07:00

net

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

2017-07-05 12:31:59 -07:00

oprofile

…

pci

x86/platform/intel-mid: Make IRQ allocation a bit more flexible

2017-07-25 11:21:03 +02:00

platform

x86/platform/intel-mid: Make 'bt_sfi_data' const

2017-08-10 14:24:32 +02:00

power

x86/boot/e820: Introduce the bootloader provided e820_table_firmware[] table

2017-07-05 10:09:02 +02:00

purgatory

kasan: do not sanitize kexec purgatory

2017-03-31 17:13:30 -07:00

ras

x86/mce: Merge mce_amd_inj into mce-inject

2017-06-14 07:32:07 +02:00

realmode

x86/boot/64: Rename init_level4_pgt and early_level4_pgt

2017-06-13 08:56:55 +02:00

tools

…

um

Merge branch 'for-linus-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml

2017-07-15 10:49:33 -07:00

video

…

xen

xen/x86: fix cpu hotplug

2017-07-23 08:13:11 +02:00

.gitignore

…

Kbuild

x86/hyper-v: Include hyperv/ only when CONFIG_HYPERV is set

2017-08-10 16:50:22 +02:00

Kconfig

include/linux/string.h: add the option of fortified string.h functions

2017-07-12 16:26:03 -07:00

Kconfig.cpu

…

Kconfig.debug

x86/platform: Add PCI dependency for PUNIT_ATOM_DEBUG

2017-07-20 10:46:24 +02:00

Makefile

Merge tag 'kbuild-v4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

2017-07-07 14:09:24 -07:00

Makefile_32.cpu

kbuild: remove cc-option-align

2017-06-25 12:43:00 +09:00

Makefile.um

…