Commit 91d1e54e authored Oct 28, 2016 by Alexey Makhalov Committed by Thomas Gleixner Oct 30, 2016

x86/vmware: Add basic paravirt ops support



Add basic paravirt support:

 1. Set pv_info.name to "VMware hypervisor" to have proper boot log message
	Booting paravirtualized kernel on VMware hypervisor
    instead of "... on bare hardware"

 2. Set pv_cpu_ops.io_delay() to empty function - paravirt_noop() to
    avoid vm-exits on IO delays because io delays they are not required.

Signed-off-by: Alexey Makhalov <amakhalov@vmware.com>
Acked-by: Alok N Kataria <akataria@vmware.com>
Cc: linux-doc@vger.kernel.org
Cc: pv-drivers@vmware.com
Cc: corbet@lwn.net
Cc: virtualization@lists.linux-foundation.org
Link: http://lkml.kernel.org/r/20161028075432.90579-3-amakhalov@vmware.com


Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

parent 687bca8d

arch/x86/kernel/cpu/vmware.c

+12 −0

Original line number	Diff line number	Diff line
		@@ -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 hypervisor";
		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();
		}

		/*

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