torvalds/linux
3
0
Fork 0
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-03-22 07:27:12 +08:00
Code Issues Packages Projects Releases Wiki Activity

mshv: Handle insufficient contiguous memory hypervisor status

Browse Source 
The HV_STATUS_INSUFFICIENT_CONTIGUOUS_MEMORY status indicates that the
hypervisor lacks sufficient contiguous memory for its internal allocations.

When this status is encountered, allocate and deposit
HV_MAX_CONTIGUOUS_ALLOCATION_PAGES contiguous pages to the hypervisor.
HV_MAX_CONTIGUOUS_ALLOCATION_PAGES is defined in the hypervisor headers, a
deposit of this size will always satisfy the hypervisor's requirements.

Signed-off-by: Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>
Reviewed-by: Anirudh Rayabharam (Microsoft) <anirudh@anirudhrb.com>
Reviewed-by: Mukesh R <mrathor@linux.microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
This commit is contained in:
Stanislav Kinsburskii
2026-02-05 18:42:21 +00:00
committed by Wei Liu
parent ede54383e6
commit cf82dd5ea9
4 changed files with 8 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/hv/hv_common.c
View File

@@ -793,6 +793,7 @@ static const struct hv_status_info hv_status_infos[] = {
_STATUS_INFO(HV_STATUS_UNKNOWN_PROPERTY, -EIO),
_STATUS_INFO(HV_STATUS_PROPERTY_VALUE_OUT_OF_RANGE, -EIO),
_STATUS_INFO(HV_STATUS_INSUFFICIENT_MEMORY, -ENOMEM),
_STATUS_INFO(HV_STATUS_INSUFFICIENT_CONTIGUOUS_MEMORY, -ENOMEM),
_STATUS_INFO(HV_STATUS_INVALID_PARTITION_ID, -EINVAL),
_STATUS_INFO(HV_STATUS_INVALID_VP_INDEX, -EINVAL),
_STATUS_INFO(HV_STATUS_NOT_FOUND, -EIO),

4
drivers/hv/hv_proc.c
View File

@@ -118,6 +118,9 @@ int hv_deposit_memory_node(int node, u64 partition_id,
switch (hv_result(hv_status)) {
case HV_STATUS_INSUFFICIENT_MEMORY:
break;
case HV_STATUS_INSUFFICIENT_CONTIGUOUS_MEMORY:
num_pages = HV_MAX_CONTIGUOUS_ALLOCATION_PAGES;
break;
default:
hv_status_err(hv_status, "Unexpected!\n");
return -ENOMEM;
@@ -130,6 +133,7 @@ bool hv_result_needs_memory(u64 status)
{
switch (hv_result(status)) {
case HV_STATUS_INSUFFICIENT_MEMORY:
case HV_STATUS_INSUFFICIENT_CONTIGUOUS_MEMORY:
return true;
}
return false;

1
include/hyperv/hvgdk_mini.h
View File

@@ -38,6 +38,7 @@ struct hv_u128 {
#define HV_STATUS_INVALID_LP_INDEX 0x41
#define HV_STATUS_INVALID_REGISTER_VALUE 0x50
#define HV_STATUS_OPERATION_FAILED 0x71
#define HV_STATUS_INSUFFICIENT_CONTIGUOUS_MEMORY 0x75
#define HV_STATUS_TIME_OUT 0x78
#define HV_STATUS_CALL_PENDING 0x79
#define HV_STATUS_VTL_ALREADY_ENABLED 0x86

2
include/hyperv/hvhdk_mini.h
View File

@@ -7,6 +7,8 @@
#include "hvgdk_mini.h"
#define HV_MAX_CONTIGUOUS_ALLOCATION_PAGES 8
/*
* Doorbell connection_info flags.
*/