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

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

drivers/misc/vmw_balloon.c

+44 −30
Original line number Diff line number Diff line
@@ -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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