Commit eb79100f authored by Xavier Deguillard's avatar Xavier Deguillard Committed by Greg Kroah-Hartman

VMware balloon: Add support for balloon capabilities.

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: default avatarXavier Deguillard <xdeguillard@vmware.com>
Acked-by: default avatarDmitry Torokhov <dtor@vmware.com>
Signed-off-by: default avatarPhilip P. Moltmann <moltmann@vmware.com>
Acked-by: default avatarAndy King <acking@vmware.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ef0f8f11
......@@ -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
......@@ -131,11 +140,13 @@ MODULE_LICENSE("GPL");
#define VMW_BALLOON_ERROR_RESET 7
#define VMW_BALLOON_ERROR_BUSY 8
#define VMW_BALLOON_SUCCESS_WITH_CAPABILITIES (0x03000000)
#define VMWARE_BALLOON_CMD(cmd, data, result) \
({ \
unsigned long __stat, __dummy1, __dummy2; \
unsigned long __status, __dummy1, __dummy2; \
__asm__ __volatile__ ("inl %%dx" : \
"=a"(__stat), \
"=a"(__status), \
"=c"(__dummy1), \
"=d"(__dummy2), \
"=b"(result) : \
......@@ -144,8 +155,10 @@ MODULE_LICENSE("GPL");
"2"(VMW_BALLOON_HV_PORT), \
"3"(data) : \
"memory"); \
if (VMW_BALLOON_CMD_##cmd == VMW_BALLOON_CMD_START) \
result = __dummy1; \
result &= -1UL; \
__stat & -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;
......
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