From 91d1e54ebd1615d216b7f57324a5e69166a344e0 Mon Sep 17 00:00:00 2001 From: Alexey Makhalov Date: Fri, 28 Oct 2016 00:54:31 -0700 Subject: [PATCH] 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 Acked-by: Alok N Kataria 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 --- 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 480790fe2463..098a524a1646 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(); } /* -- 2.30.2