* [PATCH] x86/vmware: Skip timer_irq_works() check on VMware
@ 2016-10-13 18:45 Renat Valiullin
2016-10-19 15:42 ` [tip:x86/urgent] " tip-bot for Renat Valiullin
0 siblings, 1 reply; 2+ messages in thread
From: Renat Valiullin @ 2016-10-13 18:45 UTC (permalink / raw)
To: Alok Kataria, Thomas Gleixner, Ingo Molnar, H. Peter Anvin, x86,
virtualization, linux-kernel
The timer_irq_works() boot check may sometimes fail in a VM, when
the Host is overcommitted or when the Guest is running nested.
Since the intended check is unnecessary on VMware's virtual
hardware, this change by-passes it.
Signed-off-by: Renat Valiullin <rvaliullin@vmware.com>
Acked-by: Alok N Kataria <akataria@vmware.com>
---
arch/x86/kernel/cpu/vmware.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c
index 8116057..5130985 100644
--- a/arch/x86/kernel/cpu/vmware.c
+++ b/arch/x86/kernel/cpu/vmware.c
@@ -27,6 +27,7 @@
#include <asm/div64.h>
#include <asm/x86_init.h>
#include <asm/hypervisor.h>
+#include <asm/timer.h>
#include <asm/apic.h>
#define CPUID_VMWARE_INFO_LEAF 0x40000000
@@ -94,6 +95,10 @@ static void __init vmware_platform_setup(void)
} else {
pr_warn("Failed to get TSC freq from the hypervisor\n");
}
+
+#ifdef CONFIG_X86_IO_APIC
+ no_timer_check = 1;
+#endif
}
/*
--
2.7.4
^ permalink raw reply [flat|nested] 2+ messages in thread
* [tip:x86/urgent] x86/vmware: Skip timer_irq_works() check on VMware
2016-10-13 18:45 [PATCH] x86/vmware: Skip timer_irq_works() check on VMware Renat Valiullin
@ 2016-10-19 15:42 ` tip-bot for Renat Valiullin
0 siblings, 0 replies; 2+ messages in thread
From: tip-bot for Renat Valiullin @ 2016-10-19 15:42 UTC (permalink / raw)
To: linux-tip-commits; +Cc: linux-kernel, hpa, mingo, tglx, akataria, rvaliullin
Commit-ID: 854dd54245f7f1b1175b1bada613929396a571be
Gitweb: http://git.kernel.org/tip/854dd54245f7f1b1175b1bada613929396a571be
Author: Renat Valiullin <rvaliullin@vmware.com>
AuthorDate: Thu, 13 Oct 2016 11:45:39 -0700
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Wed, 19 Oct 2016 17:36:33 +0200
x86/vmware: Skip timer_irq_works() check on VMware
The timer_irq_works() boot check may sometimes fail in a VM, when
the Host is overcommitted or when the Guest is running nested.
Since the intended check is unnecessary on VMware's virtual
hardware, by-pass it.
Signed-off-by: Renat Valiullin <rvaliullin@vmware.com>
Acked-by: Alok N Kataria <akataria@vmware.com>
Cc: virtualization@lists.linux-foundation.org
Link: http://lkml.kernel.org/r/20161013184539.GA11497@rvaliullin-vm
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/x86/kernel/cpu/vmware.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c
index 8116057..5130985 100644
--- a/arch/x86/kernel/cpu/vmware.c
+++ b/arch/x86/kernel/cpu/vmware.c
@@ -27,6 +27,7 @@
#include <asm/div64.h>
#include <asm/x86_init.h>
#include <asm/hypervisor.h>
+#include <asm/timer.h>
#include <asm/apic.h>
#define CPUID_VMWARE_INFO_LEAF 0x40000000
@@ -94,6 +95,10 @@ static void __init vmware_platform_setup(void)
} else {
pr_warn("Failed to get TSC freq from the hypervisor\n");
}
+
+#ifdef CONFIG_X86_IO_APIC
+ no_timer_check = 1;
+#endif
}
/*
^ permalink raw reply [flat|nested] 2+ messages in thread
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