Commit 946f4b86 authored by Michael Kelley's avatar Michael Kelley Committed by Wei Liu
Browse files

Drivers: hv: vmbus: Handle auto EOI quirk inline 



On x86/x64, Hyper-V provides a flag to indicate auto EOI functionality,
but it doesn't on ARM64. Handle this quirk inline instead of calling
into code under arch/x86 (and coming, under arch/arm64).

No functional change.

Signed-off-by: default avatarMichael Kelley <mikelley@microsoft.com>
Reviewed-by: default avatarBoqun Feng <boqun.feng@gmail.com>
Link: https://lore.kernel.org/r/1614721102-2241-6-git-send-email-mikelley@microsoft.com


Signed-off-by: default avatarWei Liu <wei.liu@kernel.org>
parent b548a774

arch/x86/include/asm/mshyperv.h

+0 −3
Original line number Diff line number Diff line
@@ -27,9 +27,6 @@ static inline u64 hv_get_register(unsigned int reg) 
	return value;

}



#define hv_recommend_using_aeoi() \

	(!(ms_hyperv.hints & HV_DEPRECATING_AEOI_RECOMMENDED))



#define hv_set_clocksource_vdso(val) \

	((val).vdso_clock_mode = VDSO_CLOCKMODE_HVCLOCK)

#define hv_enable_vdso_clocksource() \

drivers/hv/hv.c

+11 −1
Original line number Diff line number Diff line
@@ -219,7 +219,17 @@ void hv_synic_enable_regs(unsigned int cpu) 


	shared_sint.vector = hv_get_vector();

	shared_sint.masked = false;

	shared_sint.auto_eoi = hv_recommend_using_aeoi();



	/*

	 * On architectures where Hyper-V doesn't support AEOI (e.g., ARM64),

	 * it doesn't provide a recommendation flag and AEOI must be disabled.

	 */

#ifdef HV_DEPRECATING_AEOI_RECOMMENDED

	shared_sint.auto_eoi =

			!(ms_hyperv.hints & HV_DEPRECATING_AEOI_RECOMMENDED);

#else

	shared_sint.auto_eoi = 0;

#endif

	hv_set_register(HV_REGISTER_SINT0 + VMBUS_MESSAGE_SINT,

				shared_sint.as_uint64);