linux-kernel - [PATCH 1/2] include/linux/hypervisor.h: Add test for running on Hyper-V

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Message-ID: <1541093480-10539-1-git-send-email-mikelley@microsoft.com>
Date:   Thu, 1 Nov 2018 17:32:04 +0000
From:   Michael Kelley <mikelley@...rosoft.com>
To:     "virtualization@...ts.linux-foundation.org" 
        <virtualization@...ts.linux-foundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "daniel.lezcano@...aro.org" <daniel.lezcano@...aro.org>,
        "jgross@...e.com" <jgross@...e.com>,
        "akataria@...are.com" <akataria@...are.com>,
        "olaf@...fle.de" <olaf@...fle.de>,
        "apw@...onical.com" <apw@...onical.com>,
        vkuznets <vkuznets@...hat.com>,
        "jasowang@...hat.com" <jasowang@...hat.com>,
        "marcelo.cerri@...onical.com" <marcelo.cerri@...onical.com>,
        KY Srinivasan <kys@...rosoft.com>
CC:     Michael Kelley <mikelley@...rosoft.com>
Subject: [PATCH 1/2] include/linux/hypervisor.h: Add test for running on
 Hyper-V

Add a test for running on Hyper-V on x86/x64.

Signed-off-by: Michael Kelley <mikelley@...rosoft.com>
---
 include/linux/hypervisor.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/include/linux/hypervisor.h b/include/linux/hypervisor.h
index fc08b43..1281f62 100644
--- a/include/linux/hypervisor.h
+++ b/include/linux/hypervisor.h
@@ -9,6 +9,7 @@
 
 #ifdef CONFIG_X86
 
+#include <asm/hypervisor.h>
 #include <asm/jailhouse_para.h>
 #include <asm/x86_init.h>
 
@@ -17,6 +18,11 @@ static inline void hypervisor_pin_vcpu(int cpu)
 	x86_platform.hyper.pin_vcpu(cpu);
 }
 
+static inline bool hypervisor_is_mshyperv(void)
+{
+	return hypervisor_is_type(X86_HYPER_MS_HYPERV);
+}
+
 #else /* !CONFIG_X86 */
 
 #include <linux/of.h>
@@ -30,6 +36,11 @@ static inline bool jailhouse_paravirt(void)
 	return of_find_compatible_node(NULL, NULL, "jailhouse,cell");
 }
 
+static inline bool hypervisor_is_mshyperv(void)
+{
+	return false;
+}
+
 #endif /* !CONFIG_X86 */
 
 #endif /* __LINUX_HYPEVISOR_H */
-- 
1.8.3.1