[PATCH 2/3] x86/vmware: Add basic paravirt ops support
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From: Alexey Makhalov <hidden>
Date: 2016-10-26 05:26:00
Subsystem:
the rest, vmware hypervisor interface, x86 architecture (32-bit and 64-bit) · Maintainers:
Linus Torvalds, Ajay Kaher, Alexey Makhalov, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
Revision v1 of 4 in this series; 1 review trailer.
Revisions (4)
- v1 current
- v1
- v3 [diff vs current]
- v3 [diff vs current]
Possibly related (same subject, not in this thread)
- 2016-10-26 · Re: [PATCH 2/3] x86/vmware: Add basic paravirt ops support · Thomas Gleixner <hidden>
- 2016-10-26 · Re: [PATCH 2/3] x86/vmware: Add basic paravirt ops support · Tim Mann <hidden>
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 <redacted>
Acked-by: Alok N Kataria <redacted>
---
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