The patch titled
KVM: make hardware detection an arch operation
has been added to the -mm tree. Its filename is
kvm-make-hardware-detection-an-arch-operation.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: KVM: make hardware detection an arch operation
From: Avi Kivity <avi@xxxxxxxxxxxx>
Signed-off-by: Avi Kivity <avi@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/kvm/kvm.h | 2 ++
drivers/kvm/kvm_main.c | 33 ++++++++++-----------------------
drivers/kvm/vmx.c | 18 ++++++++++++++++++
3 files changed, 30 insertions(+), 23 deletions(-)
diff -puN drivers/kvm/kvm.h~kvm-make-hardware-detection-an-arch-operation drivers/kvm/kvm.h
--- a/drivers/kvm/kvm.h~kvm-make-hardware-detection-an-arch-operation
+++ a/drivers/kvm/kvm.h
@@ -236,6 +236,8 @@ struct kvm_stat {
};
struct kvm_arch_ops {
+ int (*cpu_has_kvm_support)(void); /* __init */
+ int (*disabled_by_bios)(void); /* __init */
};
extern struct kvm_stat kvm_stat;
diff -puN drivers/kvm/kvm_main.c~kvm-make-hardware-detection-an-arch-operation drivers/kvm/kvm_main.c
--- a/drivers/kvm/kvm_main.c~kvm-make-hardware-detection-an-arch-operation
+++ a/drivers/kvm/kvm_main.c
@@ -527,12 +527,6 @@ static void free_vmcs(struct vmcs *vmcs)
free_pages((unsigned long)vmcs, vmcs_descriptor.order);
}
-static __init int cpu_has_kvm_support(void)
-{
- unsigned long ecx = cpuid_ecx(1);
- return test_bit(5, &ecx); /* CPUID.1:ECX.VMX[bit 5] -> VT */
-}
-
static __exit void free_kvm_area(void)
{
int cpu;
@@ -559,14 +553,6 @@ static __init int alloc_kvm_area(void)
return 0;
}
-static __init int vmx_disabled_by_bios(void)
-{
- u64 msr;
-
- rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
- return (msr & 5) == 1; /* locked but not enabled */
-}
-
static __init void kvm_enable(void *garbage)
{
int cpu = raw_smp_processor_id();
@@ -3616,6 +3602,16 @@ int kvm_init_arch(struct kvm_arch_ops *o
int r;
kvm_arch_ops = ops;
+
+ if (!kvm_arch_ops->cpu_has_kvm_support()) {
+ printk(KERN_ERR "kvm: no hardware support\n");
+ return -EOPNOTSUPP;
+ }
+ if (kvm_arch_ops->disabled_by_bios()) {
+ printk(KERN_ERR "kvm: disabled by bios\n");
+ return -EOPNOTSUPP;
+ }
+
kvm_chardev_ops.owner = module;
r = misc_register(&kvm_dev);
@@ -3638,15 +3634,6 @@ static __init int kvm_init(void)
static struct page *bad_page;
int r = 0;
- if (!cpu_has_kvm_support()) {
- printk(KERN_ERR "kvm: no hardware support\n");
- return -EOPNOTSUPP;
- }
- if (vmx_disabled_by_bios()) {
- printk(KERN_ERR "kvm: disabled by bios\n");
- return -EOPNOTSUPP;
- }
-
kvm_init_debug();
setup_vmcs_descriptor();
diff -puN drivers/kvm/vmx.c~kvm-make-hardware-detection-an-arch-operation drivers/kvm/vmx.c
--- a/drivers/kvm/vmx.c~kvm-make-hardware-detection-an-arch-operation
+++ a/drivers/kvm/vmx.c
@@ -18,10 +18,28 @@
#include "kvm.h"
#include <linux/module.h>
+#define MSR_IA32_FEATURE_CONTROL 0x03a
+
MODULE_AUTHOR("Qumranet");
MODULE_LICENSE("GPL");
+static __init int cpu_has_kvm_support(void)
+{
+ unsigned long ecx = cpuid_ecx(1);
+ return test_bit(5, &ecx); /* CPUID.1:ECX.VMX[bit 5] -> VT */
+}
+
+static __init int vmx_disabled_by_bios(void)
+{
+ u64 msr;
+
+ rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
+ return (msr & 5) == 1; /* locked but not enabled */
+}
+
static struct kvm_arch_ops vmx_arch_ops = {
+ .cpu_has_kvm_support = cpu_has_kvm_support,
+ .disabled_by_bios = vmx_disabled_by_bios,
};
static int __init vmx_init(void)
_
Patches currently in -mm which might be from avi@xxxxxxxxxxxx are
kvm-userspace-interface.patch
kvm-userspace-interface-make-enum-values-in-userspace-interface-explicit.patch
kvm-intel-virtual-mode-extensions-definitions.patch
kvm-kvm-data-structures.patch
kvm-random-accessors-and-constants.patch
kvm-virtualization-infrastructure.patch
kvm-virtualization-infrastructure-kvm-fix-guest-cr4-corruption.patch
kvm-virtualization-infrastructure-include-desch.patch
kvm-virtualization-infrastructure-fix-segment-state-changes-across-processor-mode-switches.patch
kvm-virtualization-infrastructure-fix-asm-constraints-for-segment-loads.patch
kvm-virtualization-infrastructure-fix-mmu-reset-locking-when-setting-cr0.patch
kvm-memory-slot-management.patch
kvm-vcpu-creation-and-maintenance.patch
kvm-vcpu-creation-and-maintenance-segment-access-cleanup.patch
kvm-workaround-cr0cd-cache-disable-bit-leak-from-guest-to.patch
kvm-vcpu-execution-loop.patch
kvm-define-exit-handlers.patch
kvm-define-exit-handlers-pass-fs-gs-segment-bases-to-x86-emulator.patch
kvm-less-common-exit-handlers.patch
kvm-less-common-exit-handlers-handle-rdmsrmsr_efer.patch
kvm-mmu.patch
kvm-x86-emulator.patch
kvm-clarify-licensing.patch
kvm-x86-emulator-fix-emulator-mov-cr-decoding.patch
kvm-plumbing.patch
kvm-dynamically-determine-which-msrs-to-load-and-save.patch
kvm-fix-calculation-of-initial-value-of-rdx-register.patch
kvm-avoid-using-vmx-instruction-directly.patch
kvm-avoid-using-vmx-instruction-directly-fix-asm-constraints.patch
kvm-expose-interrupt-bitmap.patch
kvm-add-time-stamp-counter-msr-and-accessors.patch
kvm-expose-msrs-to-userspace.patch
kvm-expose-msrs-to-userspace-v2.patch
kvm-create-kvm-intelko-module.patch
kvm-make-dev-registration-happen-when-the-arch.patch
kvm-make-hardware-detection-an-arch-operation.patch
kvm-make-the-per-cpu-enable-disable-functions-arch.patch
kvm-make-the-hardware-setup-operations-non-percpu.patch
kvm-make-the-guest-debugger-an-arch-operation.patch
kvm-make-msr-accessors-arch-operations.patch
kvm-make-the-segment-accessors-arch-operations.patch
kvm-cache-guest-cr4-in-vcpu-structure.patch
kvm-cache-guest-cr0-in-vcpu-structure.patch
kvm-add-get_segment_base-arch-accessor.patch
kvm-add-idt-and-gdt-descriptor-accessors.patch
kvm-make-syncing-the-register-file-to-the-vcpu.patch
kvm-make-the-vcpu-execution-loop-an-arch-operation.patch
kvm-move-the-vmx-exit-handlers-to-vmxc.patch
kvm-make-vcpu_setup-an-arch-operation.patch
kvm-make-__set_cr0-and-dependencies-arch-operations.patch
kvm-make-__set_cr4-an-arch-operation.patch
kvm-make-__set_efer-an-arch-operation.patch
kvm-make-set_cr3-and-tlb-flushing-arch-operations.patch
kvm-make-inject_page_fault-an-arch-operation.patch
kvm-make-inject_gp-an-arch-operation.patch
kvm-use-the-idt-and-gdt-accessors-in-realmode-emulation.patch
kvm-use-the-general-purpose-register-accessors-rather.patch
kvm-move-the-vmx-tsc-accessors-to-vmxc.patch
kvm-access-rflags-through-an-arch-operation.patch
kvm-move-the-vmx-segment-field-definitions-to-vmxc.patch
kvm-add-an-arch-accessor-for-cs-d-b-and-l-bits.patch
kvm-add-a-set_cr0_no_modeswitch-arch-accessor.patch
kvm-make-vcpu_load-and-vcpu_put-arch-operations.patch
kvm-make-vcpu-creation-and-destruction-arch-operations.patch
kvm-move-vmcs-static-variables-to-vmxc.patch
kvm-make-is_long_mode-an-arch-operation.patch
kvm-use-the-tlb-flush-arch-operation-instead-of-an.patch
kvm-remove-guest_cpl.patch
kvm-move-vmcs-accessors-to-vmxc.patch
kvm-move-vmx-helper-inlines-to-vmxc.patch
kvm-remove-vmx-includes-from-arch-independent-code.patch
-
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