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| author | Alexey Makhalov <amakhalov@vmware.com> | 2016-10-28 10:54:31 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2016-10-30 10:57:07 +0300 |
| commit | 91d1e54ebd1615d216b7f57324a5e69166a344e0 (patch) | |
| tree | fee6e6432b3ceeda77b4aca46d65b41d85288e95 /arch/x86/kernel/cpu/vmware.c | |
| parent | 687bca8d664ac9b098005b57846773eb62040ae0 (diff) | |
| download | linux-91d1e54ebd1615d216b7f57324a5e69166a344e0.tar.xz | |
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>
Diffstat (limited to 'arch/x86/kernel/cpu/vmware.c')
| -rw-r--r-- | arch/x86/kernel/cpu/vmware.c | 12 |
1 files changed, 12 insertions, 0 deletions
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(); } /* |