linux-kernel - [PATCH AUTOSEL 4.14 29/33] x86/hyperv: Set pv

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Date:   Sat, 26 Oct 2019 09:21:06 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Andrea Parri <parri.andrea@...il.com>,
        Michael Kelley <mikelley@...rosoft.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Wei Liu <wei.liu@...nel.org>,
        YueHaibing <yuehaibing@...wei.com>,
        Sasha Levin <sashal@...nel.org>, linux-hyperv@...r.kernel.org
Subject: [PATCH AUTOSEL 4.14 29/33] x86/hyperv: Set pv_info.name to "Hyper-V"

From: Andrea Parri <parri.andrea@...il.com>

[ Upstream commit f7c0f50f1857c1cf013466fcea4dc98d116bf456 ]

Michael reported that the x86/hyperv initialization code prints the
following dmesg when running in a VM on Hyper-V:

  [    0.000738] Booting paravirtualized kernel on bare hardware

Let the x86/hyperv initialization code set pv_info.name to "Hyper-V" so
dmesg reports correctly:

  [    0.000172] Booting paravirtualized kernel on Hyper-V

[ tglx: Folded build fix provided by Yue ]

Reported-by: Michael Kelley <mikelley@...rosoft.com>
Signed-off-by: Andrea Parri <parri.andrea@...il.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Reviewed-by: Wei Liu <wei.liu@...nel.org>
Reviewed-by: Michael Kelley <mikelley@...rosoft.com>
Cc: YueHaibing <yuehaibing@...wei.com>
Link: https://lkml.kernel.org/r/20191015103502.13156-1-parri.andrea@gmail.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/x86/kernel/cpu/mshyperv.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index c0201b11e9e2a..4e7adccf812d4 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -171,6 +171,10 @@ static void __init ms_hyperv_init_platform(void)
 	int hv_host_info_ecx;
 	int hv_host_info_edx;
 
+#ifdef CONFIG_PARAVIRT
+	pv_info.name = "Hyper-V";
+#endif
+
 	/*
 	 * Extract the features and hints
 	 */
-- 
2.20.1