mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-26 00:25:33 +07:00
60cfce4c4f
This patch is to add hyperv_nested_flush_guest_mapping support to trace hvFlushGuestPhysicalAddressSpace hypercall. 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>
57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
/*
|
|
* Hyper-V nested virtualization code.
|
|
*
|
|
* Copyright (C) 2018, Microsoft, Inc.
|
|
*
|
|
* Author : Lan Tianyu <Tianyu.Lan@microsoft.com>
|
|
*/
|
|
|
|
|
|
#include <linux/types.h>
|
|
#include <asm/hyperv-tlfs.h>
|
|
#include <asm/mshyperv.h>
|
|
#include <asm/tlbflush.h>
|
|
|
|
#include <asm/trace/hyperv.h>
|
|
|
|
int hyperv_flush_guest_mapping(u64 as)
|
|
{
|
|
struct hv_guest_mapping_flush **flush_pcpu;
|
|
struct hv_guest_mapping_flush *flush;
|
|
u64 status;
|
|
unsigned long flags;
|
|
int ret = -ENOTSUPP;
|
|
|
|
if (!hv_hypercall_pg)
|
|
goto fault;
|
|
|
|
local_irq_save(flags);
|
|
|
|
flush_pcpu = (struct hv_guest_mapping_flush **)
|
|
this_cpu_ptr(hyperv_pcpu_input_arg);
|
|
|
|
flush = *flush_pcpu;
|
|
|
|
if (unlikely(!flush)) {
|
|
local_irq_restore(flags);
|
|
goto fault;
|
|
}
|
|
|
|
flush->address_space = as;
|
|
flush->flags = 0;
|
|
|
|
status = hv_do_hypercall(HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_SPACE,
|
|
flush, NULL);
|
|
local_irq_restore(flags);
|
|
|
|
if (!(status & HV_HYPERCALL_RESULT_MASK))
|
|
ret = 0;
|
|
|
|
fault:
|
|
trace_hyperv_nested_flush_guest_mapping(as, ret);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(hyperv_flush_guest_mapping);
|