mirror of https://gitee.com/openkylin/linux.git
Merge branch 'x86-hyperv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 hyperv updates from Thomas Gleixner: "A set of commits to enable APIC enlightenment when running as a guest on Microsoft HyperV. This accelerates the APIC access with paravirtualization techniques, which are called enlightenments on Hyper-V" * 'x86-hyperv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/Hyper-V/hv_apic: Build the Hyper-V APIC conditionally x86/Hyper-V/hv_apic: Include asm/apic.h X86/Hyper-V: Consolidate the allocation of the hypercall input page X86/Hyper-V: Consolidate code for converting cpumask to vpset X86/Hyper-V: Enhanced IPI enlightenment X86/Hyper-V: Enable IPI enlightenments X86/Hyper-V: Enlighten APIC access
This commit is contained in:
Linus Torvalds
commit
716a685fdb
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|
@ -1 +1,2 @@
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obj-y := hv_init.o mmu.o
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obj-y := hv_init.o mmu.o
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obj-$(CONFIG_X86_64) += hv_apic.o
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|
|
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@ -0,0 +1,256 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Hyper-V specific APIC code.
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*
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* Copyright (C) 2018, Microsoft, Inc.
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*
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* Author : K. Y. Srinivasan <kys@microsoft.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
|
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* by the Free Software Foundation.
|
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*
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* This program is distributed in the hope that it will be useful, but
|
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* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
|
||||
* NON INFRINGEMENT. See the GNU General Public License for more
|
||||
* details.
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*
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*/
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#include <linux/types.h>
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#include <linux/version.h>
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#include <linux/vmalloc.h>
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#include <linux/mm.h>
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#include <linux/clockchips.h>
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#include <linux/hyperv.h>
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#include <linux/slab.h>
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#include <linux/cpuhotplug.h>
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#include <asm/hypervisor.h>
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#include <asm/mshyperv.h>
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#include <asm/apic.h>
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static struct apic orig_apic;
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static u64 hv_apic_icr_read(void)
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{
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u64 reg_val;
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rdmsrl(HV_X64_MSR_ICR, reg_val);
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return reg_val;
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}
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static void hv_apic_icr_write(u32 low, u32 id)
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{
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u64 reg_val;
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reg_val = SET_APIC_DEST_FIELD(id);
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reg_val = reg_val << 32;
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reg_val |= low;
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wrmsrl(HV_X64_MSR_ICR, reg_val);
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}
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static u32 hv_apic_read(u32 reg)
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{
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u32 reg_val, hi;
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switch (reg) {
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case APIC_EOI:
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rdmsr(HV_X64_MSR_EOI, reg_val, hi);
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return reg_val;
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case APIC_TASKPRI:
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rdmsr(HV_X64_MSR_TPR, reg_val, hi);
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return reg_val;
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|
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default:
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return native_apic_mem_read(reg);
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}
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}
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|
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static void hv_apic_write(u32 reg, u32 val)
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{
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switch (reg) {
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case APIC_EOI:
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wrmsr(HV_X64_MSR_EOI, val, 0);
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break;
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case APIC_TASKPRI:
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wrmsr(HV_X64_MSR_TPR, val, 0);
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break;
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default:
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native_apic_mem_write(reg, val);
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}
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}
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|
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static void hv_apic_eoi_write(u32 reg, u32 val)
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{
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wrmsr(HV_X64_MSR_EOI, val, 0);
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}
|
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|
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/*
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* IPI implementation on Hyper-V.
|
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*/
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static bool __send_ipi_mask_ex(const struct cpumask *mask, int vector)
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{
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struct ipi_arg_ex **arg;
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struct ipi_arg_ex *ipi_arg;
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unsigned long flags;
|
||||
int nr_bank = 0;
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int ret = 1;
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|
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local_irq_save(flags);
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arg = (struct ipi_arg_ex **)this_cpu_ptr(hyperv_pcpu_input_arg);
|
||||
|
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ipi_arg = *arg;
|
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if (unlikely(!ipi_arg))
|
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goto ipi_mask_ex_done;
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|
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ipi_arg->vector = vector;
|
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ipi_arg->reserved = 0;
|
||||
ipi_arg->vp_set.valid_bank_mask = 0;
|
||||
|
||||
if (!cpumask_equal(mask, cpu_present_mask)) {
|
||||
ipi_arg->vp_set.format = HV_GENERIC_SET_SPARSE_4K;
|
||||
nr_bank = cpumask_to_vpset(&(ipi_arg->vp_set), mask);
|
||||
}
|
||||
if (!nr_bank)
|
||||
ipi_arg->vp_set.format = HV_GENERIC_SET_ALL;
|
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|
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ret = hv_do_rep_hypercall(HVCALL_SEND_IPI_EX, 0, nr_bank,
|
||||
ipi_arg, NULL);
|
||||
|
||||
ipi_mask_ex_done:
|
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local_irq_restore(flags);
|
||||
return ((ret == 0) ? true : false);
|
||||
}
|
||||
|
||||
static bool __send_ipi_mask(const struct cpumask *mask, int vector)
|
||||
{
|
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int cur_cpu, vcpu;
|
||||
struct ipi_arg_non_ex **arg;
|
||||
struct ipi_arg_non_ex *ipi_arg;
|
||||
int ret = 1;
|
||||
unsigned long flags;
|
||||
|
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if (cpumask_empty(mask))
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return true;
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|
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if (!hv_hypercall_pg)
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return false;
|
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|
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if ((vector < HV_IPI_LOW_VECTOR) || (vector > HV_IPI_HIGH_VECTOR))
|
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return false;
|
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|
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if ((ms_hyperv.hints & HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED))
|
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return __send_ipi_mask_ex(mask, vector);
|
||||
|
||||
local_irq_save(flags);
|
||||
arg = (struct ipi_arg_non_ex **)this_cpu_ptr(hyperv_pcpu_input_arg);
|
||||
|
||||
ipi_arg = *arg;
|
||||
if (unlikely(!ipi_arg))
|
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goto ipi_mask_done;
|
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|
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ipi_arg->vector = vector;
|
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ipi_arg->reserved = 0;
|
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ipi_arg->cpu_mask = 0;
|
||||
|
||||
for_each_cpu(cur_cpu, mask) {
|
||||
vcpu = hv_cpu_number_to_vp_number(cur_cpu);
|
||||
/*
|
||||
* This particular version of the IPI hypercall can
|
||||
* only target upto 64 CPUs.
|
||||
*/
|
||||
if (vcpu >= 64)
|
||||
goto ipi_mask_done;
|
||||
|
||||
__set_bit(vcpu, (unsigned long *)&ipi_arg->cpu_mask);
|
||||
}
|
||||
|
||||
ret = hv_do_hypercall(HVCALL_SEND_IPI, ipi_arg, NULL);
|
||||
|
||||
ipi_mask_done:
|
||||
local_irq_restore(flags);
|
||||
return ((ret == 0) ? true : false);
|
||||
}
|
||||
|
||||
static bool __send_ipi_one(int cpu, int vector)
|
||||
{
|
||||
struct cpumask mask = CPU_MASK_NONE;
|
||||
|
||||
cpumask_set_cpu(cpu, &mask);
|
||||
return __send_ipi_mask(&mask, vector);
|
||||
}
|
||||
|
||||
static void hv_send_ipi(int cpu, int vector)
|
||||
{
|
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if (!__send_ipi_one(cpu, vector))
|
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orig_apic.send_IPI(cpu, vector);
|
||||
}
|
||||
|
||||
static void hv_send_ipi_mask(const struct cpumask *mask, int vector)
|
||||
{
|
||||
if (!__send_ipi_mask(mask, vector))
|
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orig_apic.send_IPI_mask(mask, vector);
|
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}
|
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|
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static void hv_send_ipi_mask_allbutself(const struct cpumask *mask, int vector)
|
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{
|
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unsigned int this_cpu = smp_processor_id();
|
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struct cpumask new_mask;
|
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const struct cpumask *local_mask;
|
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|
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cpumask_copy(&new_mask, mask);
|
||||
cpumask_clear_cpu(this_cpu, &new_mask);
|
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local_mask = &new_mask;
|
||||
if (!__send_ipi_mask(local_mask, vector))
|
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orig_apic.send_IPI_mask_allbutself(mask, vector);
|
||||
}
|
||||
|
||||
static void hv_send_ipi_allbutself(int vector)
|
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{
|
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hv_send_ipi_mask_allbutself(cpu_online_mask, vector);
|
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}
|
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|
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static void hv_send_ipi_all(int vector)
|
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{
|
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if (!__send_ipi_mask(cpu_online_mask, vector))
|
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orig_apic.send_IPI_all(vector);
|
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}
|
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|
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static void hv_send_ipi_self(int vector)
|
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{
|
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if (!__send_ipi_one(smp_processor_id(), vector))
|
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orig_apic.send_IPI_self(vector);
|
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}
|
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|
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void __init hv_apic_init(void)
|
||||
{
|
||||
if (ms_hyperv.hints & HV_X64_CLUSTER_IPI_RECOMMENDED) {
|
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if ((ms_hyperv.hints & HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED))
|
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pr_info("Hyper-V: Using ext hypercalls for IPI\n");
|
||||
else
|
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pr_info("Hyper-V: Using IPI hypercalls\n");
|
||||
/*
|
||||
* Set the IPI entry points.
|
||||
*/
|
||||
orig_apic = *apic;
|
||||
|
||||
apic->send_IPI = hv_send_ipi;
|
||||
apic->send_IPI_mask = hv_send_ipi_mask;
|
||||
apic->send_IPI_mask_allbutself = hv_send_ipi_mask_allbutself;
|
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apic->send_IPI_allbutself = hv_send_ipi_allbutself;
|
||||
apic->send_IPI_all = hv_send_ipi_all;
|
||||
apic->send_IPI_self = hv_send_ipi_self;
|
||||
}
|
||||
|
||||
if (ms_hyperv.hints & HV_X64_APIC_ACCESS_RECOMMENDED) {
|
||||
pr_info("Hyper-V: Using MSR based APIC access\n");
|
||||
apic_set_eoi_write(hv_apic_eoi_write);
|
||||
apic->read = hv_apic_read;
|
||||
apic->write = hv_apic_write;
|
||||
apic->icr_write = hv_apic_icr_write;
|
||||
apic->icr_read = hv_apic_icr_read;
|
||||
}
|
||||
}
|
||||
|
|
@ -91,12 +91,19 @@ EXPORT_SYMBOL_GPL(hv_vp_index);
|
|||
struct hv_vp_assist_page **hv_vp_assist_page;
|
||||
EXPORT_SYMBOL_GPL(hv_vp_assist_page);
|
||||
|
||||
void __percpu **hyperv_pcpu_input_arg;
|
||||
EXPORT_SYMBOL_GPL(hyperv_pcpu_input_arg);
|
||||
|
||||
u32 hv_max_vp_index;
|
||||
|
||||
static int hv_cpu_init(unsigned int cpu)
|
||||
{
|
||||
u64 msr_vp_index;
|
||||
struct hv_vp_assist_page **hvp = &hv_vp_assist_page[smp_processor_id()];
|
||||
void **input_arg;
|
||||
|
||||
input_arg = (void **)this_cpu_ptr(hyperv_pcpu_input_arg);
|
||||
*input_arg = page_address(alloc_page(GFP_KERNEL));
|
||||
|
||||
hv_get_vp_index(msr_vp_index);
|
||||
|
||||
|
|
@ -217,6 +224,16 @@ static int hv_cpu_die(unsigned int cpu)
|
|||
{
|
||||
struct hv_reenlightenment_control re_ctrl;
|
||||
unsigned int new_cpu;
|
||||
unsigned long flags;
|
||||
void **input_arg;
|
||||
void *input_pg = NULL;
|
||||
|
||||
local_irq_save(flags);
|
||||
input_arg = (void **)this_cpu_ptr(hyperv_pcpu_input_arg);
|
||||
input_pg = *input_arg;
|
||||
*input_arg = NULL;
|
||||
local_irq_restore(flags);
|
||||
free_page((unsigned long)input_pg);
|
||||
|
||||
if (hv_vp_assist_page && hv_vp_assist_page[cpu])
|
||||
wrmsrl(HV_X64_MSR_VP_ASSIST_PAGE, 0);
|
||||
|
|
@ -242,8 +259,9 @@ static int hv_cpu_die(unsigned int cpu)
|
|||
*
|
||||
* 1. Setup the hypercall page.
|
||||
* 2. Register Hyper-V specific clocksource.
|
||||
* 3. Setup Hyper-V specific APIC entry points.
|
||||
*/
|
||||
void hyperv_init(void)
|
||||
void __init hyperv_init(void)
|
||||
{
|
||||
u64 guest_id, required_msrs;
|
||||
union hv_x64_msr_hypercall_contents hypercall_msr;
|
||||
|
|
@ -259,6 +277,16 @@ void hyperv_init(void)
|
|||
if ((ms_hyperv.features & required_msrs) != required_msrs)
|
||||
return;
|
||||
|
||||
/*
|
||||
* Allocate the per-CPU state for the hypercall input arg.
|
||||
* If this allocation fails, we will not be able to setup
|
||||
* (per-CPU) hypercall input page and thus this failure is
|
||||
* fatal on Hyper-V.
|
||||
*/
|
||||
hyperv_pcpu_input_arg = alloc_percpu(void *);
|
||||
|
||||
BUG_ON(hyperv_pcpu_input_arg == NULL);
|
||||
|
||||
/* Allocate percpu VP index */
|
||||
hv_vp_index = kmalloc_array(num_possible_cpus(), sizeof(*hv_vp_index),
|
||||
GFP_KERNEL);
|
||||
|
|
@ -296,7 +324,7 @@ void hyperv_init(void)
|
|||
hypercall_msr.guest_physical_address = vmalloc_to_pfn(hv_hypercall_pg);
|
||||
wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64);
|
||||
|
||||
hyper_alloc_mmu();
|
||||
hv_apic_init();
|
||||
|
||||
/*
|
||||
* Register Hyper-V specific clocksource.
|
||||
|
|
|
|||
|
|
@ -25,20 +25,13 @@ struct hv_flush_pcpu {
|
|||
struct hv_flush_pcpu_ex {
|
||||
u64 address_space;
|
||||
u64 flags;
|
||||
struct {
|
||||
u64 format;
|
||||
u64 valid_bank_mask;
|
||||
u64 bank_contents[];
|
||||
} hv_vp_set;
|
||||
struct hv_vpset hv_vp_set;
|
||||
u64 gva_list[];
|
||||
};
|
||||
|
||||
/* Each gva in gva_list encodes up to 4096 pages to flush */
|
||||
#define HV_TLB_FLUSH_UNIT (4096 * PAGE_SIZE)
|
||||
|
||||
static struct hv_flush_pcpu __percpu **pcpu_flush;
|
||||
|
||||
static struct hv_flush_pcpu_ex __percpu **pcpu_flush_ex;
|
||||
|
||||
/*
|
||||
* Fills in gva_list starting from offset. Returns the number of items added.
|
||||
|
|
@ -70,41 +63,6 @@ static inline int fill_gva_list(u64 gva_list[], int offset,
|
|||
return gva_n - offset;
|
||||
}
|
||||
|
||||
/* Return the number of banks in the resulting vp_set */
|
||||
static inline int cpumask_to_vp_set(struct hv_flush_pcpu_ex *flush,
|
||||
const struct cpumask *cpus)
|
||||
{
|
||||
int cpu, vcpu, vcpu_bank, vcpu_offset, nr_bank = 1;
|
||||
|
||||
/* valid_bank_mask can represent up to 64 banks */
|
||||
if (hv_max_vp_index / 64 >= 64)
|
||||
return 0;
|
||||
|
||||
/*
|
||||
* Clear all banks up to the maximum possible bank as hv_flush_pcpu_ex
|
||||
* structs are not cleared between calls, we risk flushing unneeded
|
||||
* vCPUs otherwise.
|
||||
*/
|
||||
for (vcpu_bank = 0; vcpu_bank <= hv_max_vp_index / 64; vcpu_bank++)
|
||||
flush->hv_vp_set.bank_contents[vcpu_bank] = 0;
|
||||
|
||||
/*
|
||||
* Some banks may end up being empty but this is acceptable.
|
||||
*/
|
||||
for_each_cpu(cpu, cpus) {
|
||||
vcpu = hv_cpu_number_to_vp_number(cpu);
|
||||
vcpu_bank = vcpu / 64;
|
||||
vcpu_offset = vcpu % 64;
|
||||
__set_bit(vcpu_offset, (unsigned long *)
|
||||
&flush->hv_vp_set.bank_contents[vcpu_bank]);
|
||||
if (vcpu_bank >= nr_bank)
|
||||
nr_bank = vcpu_bank + 1;
|
||||
}
|
||||
flush->hv_vp_set.valid_bank_mask = GENMASK_ULL(nr_bank - 1, 0);
|
||||
|
||||
return nr_bank;
|
||||
}
|
||||
|
||||
static void hyperv_flush_tlb_others(const struct cpumask *cpus,
|
||||
const struct flush_tlb_info *info)
|
||||
{
|
||||
|
|
@ -116,7 +74,7 @@ static void hyperv_flush_tlb_others(const struct cpumask *cpus,
|
|||
|
||||
trace_hyperv_mmu_flush_tlb_others(cpus, info);
|
||||
|
||||
if (!pcpu_flush || !hv_hypercall_pg)
|
||||
if (!hv_hypercall_pg)
|
||||
goto do_native;
|
||||
|
||||
if (cpumask_empty(cpus))
|
||||
|
|
@ -124,10 +82,8 @@ static void hyperv_flush_tlb_others(const struct cpumask *cpus,
|
|||
|
||||
local_irq_save(flags);
|
||||
|
||||
flush_pcpu = this_cpu_ptr(pcpu_flush);
|
||||
|
||||
if (unlikely(!*flush_pcpu))
|
||||
*flush_pcpu = page_address(alloc_page(GFP_ATOMIC));
|
||||
flush_pcpu = (struct hv_flush_pcpu **)
|
||||
this_cpu_ptr(hyperv_pcpu_input_arg);
|
||||
|
||||
flush = *flush_pcpu;
|
||||
|
||||
|
|
@ -203,7 +159,7 @@ static void hyperv_flush_tlb_others_ex(const struct cpumask *cpus,
|
|||
|
||||
trace_hyperv_mmu_flush_tlb_others(cpus, info);
|
||||
|
||||
if (!pcpu_flush_ex || !hv_hypercall_pg)
|
||||
if (!hv_hypercall_pg)
|
||||
goto do_native;
|
||||
|
||||
if (cpumask_empty(cpus))
|
||||
|
|
@ -211,10 +167,8 @@ static void hyperv_flush_tlb_others_ex(const struct cpumask *cpus,
|
|||
|
||||
local_irq_save(flags);
|
||||
|
||||
flush_pcpu = this_cpu_ptr(pcpu_flush_ex);
|
||||
|
||||
if (unlikely(!*flush_pcpu))
|
||||
*flush_pcpu = page_address(alloc_page(GFP_ATOMIC));
|
||||
flush_pcpu = (struct hv_flush_pcpu_ex **)
|
||||
this_cpu_ptr(hyperv_pcpu_input_arg);
|
||||
|
||||
flush = *flush_pcpu;
|
||||
|
||||
|
|
@ -239,8 +193,8 @@ static void hyperv_flush_tlb_others_ex(const struct cpumask *cpus,
|
|||
flush->hv_vp_set.valid_bank_mask = 0;
|
||||
|
||||
if (!cpumask_equal(cpus, cpu_present_mask)) {
|
||||
flush->hv_vp_set.format = HV_GENERIC_SET_SPARCE_4K;
|
||||
nr_bank = cpumask_to_vp_set(flush, cpus);
|
||||
flush->hv_vp_set.format = HV_GENERIC_SET_SPARSE_4K;
|
||||
nr_bank = cpumask_to_vpset(&(flush->hv_vp_set), cpus);
|
||||
}
|
||||
|
||||
if (!nr_bank) {
|
||||
|
|
@ -296,14 +250,3 @@ void hyperv_setup_mmu_ops(void)
|
|||
pv_mmu_ops.flush_tlb_others = hyperv_flush_tlb_others_ex;
|
||||
}
|
||||
}
|
||||
|
||||
void hyper_alloc_mmu(void)
|
||||
{
|
||||
if (!(ms_hyperv.hints & HV_X64_REMOTE_TLB_FLUSH_RECOMMENDED))
|
||||
return;
|
||||
|
||||
if (!(ms_hyperv.hints & HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED))
|
||||
pcpu_flush = alloc_percpu(struct hv_flush_pcpu *);
|
||||
else
|
||||
pcpu_flush_ex = alloc_percpu(struct hv_flush_pcpu_ex *);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -164,6 +164,11 @@
|
|||
*/
|
||||
#define HV_X64_DEPRECATING_AEOI_RECOMMENDED (1 << 9)
|
||||
|
||||
/*
|
||||
* Recommend using cluster IPI hypercalls.
|
||||
*/
|
||||
#define HV_X64_CLUSTER_IPI_RECOMMENDED (1 << 10)
|
||||
|
||||
/* Recommend using the newer ExProcessorMasks interface */
|
||||
#define HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED (1 << 11)
|
||||
|
||||
|
|
@ -329,12 +334,17 @@ struct hv_tsc_emulation_status {
|
|||
#define HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_MASK \
|
||||
(~((1ull << HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT) - 1))
|
||||
|
||||
#define HV_IPI_LOW_VECTOR 0x10
|
||||
#define HV_IPI_HIGH_VECTOR 0xff
|
||||
|
||||
/* Declare the various hypercall operations. */
|
||||
#define HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE 0x0002
|
||||
#define HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST 0x0003
|
||||
#define HVCALL_NOTIFY_LONG_SPIN_WAIT 0x0008
|
||||
#define HVCALL_SEND_IPI 0x000b
|
||||
#define HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX 0x0013
|
||||
#define HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX 0x0014
|
||||
#define HVCALL_SEND_IPI_EX 0x0015
|
||||
#define HVCALL_POST_MESSAGE 0x005c
|
||||
#define HVCALL_SIGNAL_EVENT 0x005d
|
||||
|
||||
|
|
@ -360,7 +370,7 @@ struct hv_tsc_emulation_status {
|
|||
#define HV_FLUSH_USE_EXTENDED_RANGE_FORMAT BIT(3)
|
||||
|
||||
enum HV_GENERIC_SET_FORMAT {
|
||||
HV_GENERIC_SET_SPARCE_4K,
|
||||
HV_GENERIC_SET_SPARSE_4K,
|
||||
HV_GENERIC_SET_ALL,
|
||||
};
|
||||
|
||||
|
|
@ -706,4 +716,22 @@ struct hv_enlightened_vmcs {
|
|||
#define HV_STIMER_AUTOENABLE (1ULL << 3)
|
||||
#define HV_STIMER_SINT(config) (__u8)(((config) >> 16) & 0x0F)
|
||||
|
||||
struct ipi_arg_non_ex {
|
||||
u32 vector;
|
||||
u32 reserved;
|
||||
u64 cpu_mask;
|
||||
};
|
||||
|
||||
struct hv_vpset {
|
||||
u64 format;
|
||||
u64 valid_bank_mask;
|
||||
u64 bank_contents[];
|
||||
};
|
||||
|
||||
struct ipi_arg_ex {
|
||||
u32 vector;
|
||||
u32 reserved;
|
||||
struct hv_vpset vp_set;
|
||||
};
|
||||
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -122,6 +122,7 @@ static inline void hv_disable_stimer0_percpu_irq(int irq) {}
|
|||
#if IS_ENABLED(CONFIG_HYPERV)
|
||||
extern struct clocksource *hyperv_cs;
|
||||
extern void *hv_hypercall_pg;
|
||||
extern void __percpu **hyperv_pcpu_input_arg;
|
||||
|
||||
static inline u64 hv_do_hypercall(u64 control, void *input, void *output)
|
||||
{
|
||||
|
|
@ -258,9 +259,41 @@ static inline int hv_cpu_number_to_vp_number(int cpu_number)
|
|||
return hv_vp_index[cpu_number];
|
||||
}
|
||||
|
||||
void hyperv_init(void);
|
||||
static inline int cpumask_to_vpset(struct hv_vpset *vpset,
|
||||
const struct cpumask *cpus)
|
||||
{
|
||||
int cpu, vcpu, vcpu_bank, vcpu_offset, nr_bank = 1;
|
||||
|
||||
/* valid_bank_mask can represent up to 64 banks */
|
||||
if (hv_max_vp_index / 64 >= 64)
|
||||
return 0;
|
||||
|
||||
/*
|
||||
* Clear all banks up to the maximum possible bank as hv_flush_pcpu_ex
|
||||
* structs are not cleared between calls, we risk flushing unneeded
|
||||
* vCPUs otherwise.
|
||||
*/
|
||||
for (vcpu_bank = 0; vcpu_bank <= hv_max_vp_index / 64; vcpu_bank++)
|
||||
vpset->bank_contents[vcpu_bank] = 0;
|
||||
|
||||
/*
|
||||
* Some banks may end up being empty but this is acceptable.
|
||||
*/
|
||||
for_each_cpu(cpu, cpus) {
|
||||
vcpu = hv_cpu_number_to_vp_number(cpu);
|
||||
vcpu_bank = vcpu / 64;
|
||||
vcpu_offset = vcpu % 64;
|
||||
__set_bit(vcpu_offset, (unsigned long *)
|
||||
&vpset->bank_contents[vcpu_bank]);
|
||||
if (vcpu_bank >= nr_bank)
|
||||
nr_bank = vcpu_bank + 1;
|
||||
}
|
||||
vpset->valid_bank_mask = GENMASK_ULL(nr_bank - 1, 0);
|
||||
return nr_bank;
|
||||
}
|
||||
|
||||
void __init hyperv_init(void);
|
||||
void hyperv_setup_mmu_ops(void);
|
||||
void hyper_alloc_mmu(void);
|
||||
void hyperv_report_panic(struct pt_regs *regs, long err);
|
||||
bool hv_is_hyperv_initialized(void);
|
||||
void hyperv_cleanup(void);
|
||||
|
|
@ -269,6 +302,13 @@ 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);
|
||||
|
||||
#ifdef CONFIG_X86_64
|
||||
void hv_apic_init(void);
|
||||
#else
|
||||
static inline void hv_apic_init(void) {}
|
||||
#endif
|
||||
|
||||
#else /* CONFIG_HYPERV */
|
||||
static inline void hyperv_init(void) {}
|
||||
static inline bool hv_is_hyperv_initialized(void) { return false; }
|
||||
|
|
|
|||
Loading…
Reference in New Issue