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SubjectRE: [PATCH] x86/hyper-v: add "polling" bit to hv_synic_sint
Date
From: Wei Liu <wei.liu@kernel.org> Sent: Sunday, December 22, 2019 3:34 PM
> To: linux-hyperv@vger.kernel.org
> Cc: sashal@kernel.org; KY Srinivasan <kys@microsoft.com>; Haiyang Zhang
> <haiyangz@microsoft.com>; Stephen Hemminger <sthemmin@microsoft.com>;
> x86@kernel.org; Michael Kelley <mikelley@microsoft.com>; linux-kernel@vger.kernel.org;
> Wei Liu <wei.liu@kernel.org>
> Subject: [PATCH] x86/hyper-v: add "polling" bit to hv_synic_sint
>
> That bit is documented in TLFS 5.0c as follows:
>
> Setting the polling bit will have the effect of unmasking an
> interrupt source, except that an actual interrupt is not generated.
>
> Signed-off-by: Wei Liu <wei.liu@kernel.org>
> ---
> arch/x86/include/asm/hyperv-tlfs.h | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
> index 5f10f7f2098d..92abc1e42bfc 100644
> --- a/arch/x86/include/asm/hyperv-tlfs.h
> +++ b/arch/x86/include/asm/hyperv-tlfs.h
> @@ -809,7 +809,8 @@ union hv_synic_sint {
> u64 reserved1:8;
> u64 masked:1;
> u64 auto_eoi:1;
> - u64 reserved2:46;
> + u64 polling:1;
> + u64 reserved2:45;
> } __packed;
> };
>
> --
> 2.20.1

Reviewed-by: Michael Kelley <mikelley@microsoft.com>

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