iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

VMware balloon: Add support for balloon capabilities.

Browse Source 
In order to extend the balloon protocol, the hypervisor and the guest
driver need to agree on a set of supported functionality to use.

Signed-off-by: Xavier Deguillard <xdeguillard@vmware.com>
Acked-by: Dmitry Torokhov <dtor@vmware.com>
Signed-off-by: Philip P. Moltmann <moltmann@vmware.com>
Acked-by: Andy King <acking@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Xavier Deguillard 2015-06-12 11:43:23 -07:00 committed by Greg Kroah-Hartman
parent ef0f8f1129
commit eb79100fe6
1 changed files with 43 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

72
drivers/misc/vmw_balloon.c
View File

@ -46,7 +46,7 @@
MODULE_AUTHOR("VMware, Inc.");
MODULE_DESCRIPTION("VMware Memory Control (Balloon) Driver");
MODULE_VERSION("1.2.2.0-k");
MODULE_VERSION("1.3.0.0-k");
MODULE_ALIAS("dmi:*:svnVMware*:*");
MODULE_ALIAS("vmware_vmmemctl");
MODULE_LICENSE("GPL");
@ -110,9 +110,18 @@ MODULE_LICENSE("GPL");
*/
#define VMW_BALLOON_HV_PORT 0x5670
#define VMW_BALLOON_HV_MAGIC 0x456c6d6f
#define VMW_BALLOON_PROTOCOL_VERSION 2
#define VMW_BALLOON_GUEST_ID 1 /* Linux */
enum vmwballoon_capabilities {
/*
* Bit 0 is reserved and not associated to any capability.
*/
VMW_BALLOON_BASIC_CMDS = (1 << 1),
VMW_BALLOON_BATCHED_CMDS = (1 << 2)
};
#define VMW_BALLOON_CAPABILITIES (VMW_BALLOON_BASIC_CMDS)
#define VMW_BALLOON_CMD_START 0
#define VMW_BALLOON_CMD_GET_TARGET 1
#define VMW_BALLOON_CMD_LOCK 2
@ -120,32 +129,36 @@ MODULE_LICENSE("GPL");
#define VMW_BALLOON_CMD_GUEST_ID 4
/* error codes */
#define VMW_BALLOON_SUCCESS 0
#define VMW_BALLOON_FAILURE -1
#define VMW_BALLOON_ERROR_CMD_INVALID 1
#define VMW_BALLOON_ERROR_PPN_INVALID 2
#define VMW_BALLOON_ERROR_PPN_LOCKED 3
#define VMW_BALLOON_ERROR_PPN_UNLOCKED 4
#define VMW_BALLOON_ERROR_PPN_PINNED 5
#define VMW_BALLOON_ERROR_PPN_NOTNEEDED 6
#define VMW_BALLOON_ERROR_RESET 7
#define VMW_BALLOON_ERROR_BUSY 8
#define VMW_BALLOON_SUCCESS 0
#define VMW_BALLOON_FAILURE -1
#define VMW_BALLOON_ERROR_CMD_INVALID 1
#define VMW_BALLOON_ERROR_PPN_INVALID 2
#define VMW_BALLOON_ERROR_PPN_LOCKED 3
#define VMW_BALLOON_ERROR_PPN_UNLOCKED 4
#define VMW_BALLOON_ERROR_PPN_PINNED 5
#define VMW_BALLOON_ERROR_PPN_NOTNEEDED 6
#define VMW_BALLOON_ERROR_RESET 7
#define VMW_BALLOON_ERROR_BUSY 8
#define VMWARE_BALLOON_CMD(cmd, data, result) \
({ \
unsigned long __stat, __dummy1, __dummy2; \
__asm__ __volatile__ ("inl %%dx" : \
"=a"(__stat), \
"=c"(__dummy1), \
"=d"(__dummy2), \
"=b"(result) : \
"0"(VMW_BALLOON_HV_MAGIC), \
"1"(VMW_BALLOON_CMD_##cmd), \
"2"(VMW_BALLOON_HV_PORT), \
"3"(data) : \
"memory"); \
result &= -1UL; \
__stat & -1UL; \
#define VMW_BALLOON_SUCCESS_WITH_CAPABILITIES (0x03000000)
#define VMWARE_BALLOON_CMD(cmd, data, result) \
({ \
unsigned long __status, __dummy1, __dummy2; \
__asm__ __volatile__ ("inl %%dx" : \
"=a"(__status), \
"=c"(__dummy1), \
"=d"(__dummy2), \
"=b"(result) : \
"0"(VMW_BALLOON_HV_MAGIC), \
"1"(VMW_BALLOON_CMD_##cmd), \
"2"(VMW_BALLOON_HV_PORT), \
"3"(data) : \
"memory"); \
if (VMW_BALLOON_CMD_##cmd == VMW_BALLOON_CMD_START) \
result = __dummy1; \
result &= -1UL; \
__status & -1UL; \
})
#ifdef CONFIG_DEBUG_FS
@ -223,11 +236,12 @@ static struct vmballoon balloon;
*/
static bool vmballoon_send_start(struct vmballoon *b)
{
unsigned long status, dummy;
unsigned long status, capabilities;
STATS_INC(b->stats.start);
status = VMWARE_BALLOON_CMD(START, VMW_BALLOON_PROTOCOL_VERSION, dummy);
status = VMWARE_BALLOON_CMD(START, VMW_BALLOON_CAPABILITIES,
capabilities);
if (status == VMW_BALLOON_SUCCESS)
return true;