Commit cf82dd5e authored by Stanislav Kinsburskii's avatar Stanislav Kinsburskii Committed by Wei Liu
Browse files

mshv: Handle insufficient contiguous memory hypervisor status 



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: default avatarStanislav Kinsburskii <skinsburskii@linux.microsoft.com>
Reviewed-by: default avatarAnirudh Rayabharam (Microsoft) <anirudh@anirudhrb.com>
Reviewed-by: default avatarMukesh R <mrathor@linux.microsoft.com>
Signed-off-by: default avatarWei Liu <wei.liu@kernel.org>
parent ede54383

drivers/hv/hv_common.c

+1 −0
Original line number Diff line number Diff line
@@ -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),

drivers/hv/hv_proc.c

+4 −0
Original line number Diff line number Diff line
@@ -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;

include/hyperv/hvgdk_mini.h

+1 −0
Original line number Diff line number Diff line
@@ -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

include/hyperv/hvhdk_mini.h

+2 −0
Original line number Diff line number Diff line
@@ -7,6 +7,8 @@ 


#include "hvgdk_mini.h"



#define HV_MAX_CONTIGUOUS_ALLOCATION_PAGES	8



/*

 * Doorbell connection_info flags.

 */