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Message-ID: <20161026052600.77535-1-amakhalov@vmware.com>
Date: Tue, 25 Oct 2016 22:26:00 -0700
From: Alexey Makhalov <amakhalov@...are.com>
To: <corbet@....net>, <akataria@...are.com>, <tglx@...utronix.de>,
<mingo@...hat.com>, <hpa@...or.com>, <x86@...nel.org>
CC: <linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<virtualization@...ts.linux-foundation.org>,
<monitor-list@...are.com>, <pv-drivers@...are.com>,
<time-lords@...are.com>, Alexey Makhalov <amakhalov@...are.com>
Subject: [PATCH 2/3] x86/vmware: Add basic paravirt ops support
Add basic paravirt support:
1. set pv_info.name to "VMware" to have proper boot log message
Booting paravirtualized kernel on VMware
instead of "... on bare hardware"
2. set pv_cpu_ops.io_delay() to empty function - paravirt_nop() to
avoid vm-exits on IO delays.
Signed-off-by: Alexey Makhalov <amakhalov@...are.com>
Acked-by: Alok N Kataria <akataria@...are.com>
---
arch/x86/kernel/cpu/vmware.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c
index 480790f..e3fb320 100644
--- a/arch/x86/kernel/cpu/vmware.c
+++ b/arch/x86/kernel/cpu/vmware.c
@@ -61,6 +61,16 @@ static unsigned long vmware_get_tsc_khz(void)
return vmware_tsc_khz;
}
+#ifdef CONFIG_PARAVIRT
+static void __init vmware_paravirt_ops_setup(void)
+{
+ pv_info.name = "VMware";
+ pv_cpu_ops.io_delay = paravirt_nop;
+}
+#else
+#define vmware_paravirt_ops_setup() do {} while (0)
+#endif
+
static void __init vmware_platform_setup(void)
{
uint32_t eax, ebx, ecx, edx;
@@ -94,6 +104,8 @@ static void __init vmware_platform_setup(void)
} else {
pr_warn("Failed to get TSC freq from the hypervisor\n");
}
+
+ vmware_paravirt_ops_setup();
}
/*
--
2.10.1
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