Messages in this thread Patch in this message |  | | Date | Sun, 30 Oct 2016 18:17:52 -0700 | From | tip-bot for Alexey Makhalov <> | Subject | [tip:x86/platform] x86/vmware: Add basic paravirt ops support |
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Commit-ID: 91d1e54ebd1615d216b7f57324a5e69166a344e0 Gitweb: http://git.kernel.org/tip/91d1e54ebd1615d216b7f57324a5e69166a344e0 Author: Alexey Makhalov <amakhalov@vmware.com> AuthorDate: Fri, 28 Oct 2016 00:54:31 -0700 Committer: Thomas Gleixner <tglx@linutronix.de> CommitDate: Sun, 30 Oct 2016 08:57:07 +0100
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>
--- 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..098a524 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 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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