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Commit 6c248aad authored Mar 14, 2017 by K. Y. Srinivasan Committed by Greg Kroah-Hartman Mar 17, 2017

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: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 4539673a

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

+5 −0

Original line number	Original line	Diff line number	Diff line
	@@ -147,6 +147,11 @@
	*/		*/
	#define HV_X64_RELAXED_TIMING_RECOMMENDED (1 << 5)		#define HV_X64_RELAXED_TIMING_RECOMMENDED (1 << 5)

			/*
			* Virtual APIC support
			*/
			#define HV_X64_DEPRECATING_AEOI_RECOMMENDED (1 << 9)

	/*		/*
	* Crash notification flag.		* Crash notification flag.
	*/		*/

drivers/hv/hv.c

+4 −1

Original line number	Original line	Diff line number	Diff line
	@@ -254,6 +254,9 @@ int hv_synic_init(unsigned int cpu)
	shared_sint.as_uint64 = 0;		shared_sint.as_uint64 = 0;
	shared_sint.vector = HYPERVISOR_CALLBACK_VECTOR;		shared_sint.vector = HYPERVISOR_CALLBACK_VECTOR;
	shared_sint.masked = false;		shared_sint.masked = false;
			if (ms_hyperv.hints & HV_X64_DEPRECATING_AEOI_RECOMMENDED)
			shared_sint.auto_eoi = false;
			else
	shared_sint.auto_eoi = true;		shared_sint.auto_eoi = true;

	hv_set_synint_state(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT,		hv_set_synint_state(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT,