Commit 6c248aad authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
Browse files

Drivers: hv: Base autoeoi enablement based on hypervisor hints 



Don't enable auto-eoi if the hypervisor recommends otherwise. This will
enable vAPIC functionality if available.

Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 4539673a

arch/x86/include/uapi/asm/hyperv.h

+5 −0
Original line number Diff line number Diff line
@@ -147,6 +147,11 @@ 
 */

#define HV_X64_RELAXED_TIMING_RECOMMENDED	(1 << 5)



/*

 * Virtual APIC support

 */

#define HV_X64_DEPRECATING_AEOI_RECOMMENDED	(1 << 9)



/*

 * Crash notification flag.

 */

drivers/hv/hv.c

+4 −1
Original line number Diff line number Diff line
@@ -254,6 +254,9 @@ int hv_synic_init(unsigned int cpu) 
	shared_sint.as_uint64 = 0;

	shared_sint.vector = HYPERVISOR_CALLBACK_VECTOR;

	shared_sint.masked = false;

	if (ms_hyperv.hints & HV_X64_DEPRECATING_AEOI_RECOMMENDED)

		shared_sint.auto_eoi = false;

	else

		shared_sint.auto_eoi = true;



	hv_set_synint_state(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT,