linux-kernel - [PATCH] x86/hyper-v: add "polling" bit to hv_synic

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Date:   Sun, 22 Dec 2019 23:34:04 +0000
From:   Wei Liu <wei.liu@...nel.org>
To:     linux-hyperv@...r.kernel.org
Cc:     sashal@...nel.org, kys@...rosoft.com, haiyangz@...rosoft.com,
        sthemmin@...rosoft.com, x86@...nel.org, mikelley@...rosoft.com,
        linux-kernel@...r.kernel.org, Wei Liu <wei.liu@...nel.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@...nel.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