[prev in list] [next in list] [prev in thread] [next in thread]
List: kexec
Subject: [PATCH 6/6] kvm: x86: set kdump virt_disable function on
From: ehabkost () redhat ! com (Eduardo Habkost)
Date: 2008-10-30 13:34:46
Message-ID: 1225373687-6960-7-git-send-email-ehabkost () redhat ! com
[Download RAW message or body]
Finally implement the virt_disable function for kdump. It will call
kvm_x86_ops->crash_hardware_disable(), that will disable virtualization
extensions on the CPU if it is not disabled yet.
Signed-off-by: Eduardo Habkost <ehabkost at redhat.com>
---
arch/x86/kvm/x86.c | 19 ++++++++++++++++++-
1 files changed, 18 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index ff895e2..4f7a221 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -40,6 +40,7 @@
#include <asm/msr.h>
#include <asm/desc.h>
#include <asm/mtrr.h>
+#include <asm/virtext.h>
#define MAX_IO_MSRS 256
#define CR0_RESERVED_BITS \
@@ -2581,6 +2582,13 @@ int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
}
EXPORT_SYMBOL_GPL(kvm_emulate_pio_string);
+/* Called at crash time, so we can disable virtualization if needed
+ */
+static void crash_hardware_disable(unsigned int cpu)
+{
+ kvm_x86_ops->crash_hardware_disable(NULL);
+}
+
int kvm_arch_init(void *opaque)
{
int r;
@@ -2605,9 +2613,15 @@ int kvm_arch_init(void *opaque)
kvm_x86_ops = ops;
+ r = set_virt_disable_func(crash_hardware_disable);
+ if (r) {
+ printk(KERN_ERR "kvm: virt_disable function already set?\n");
+ goto out_clear_ops;
+ }
+
r = kvm_mmu_module_init();
if (r)
- goto out_clear_ops;
+ goto out_clear_crash;
kvm_init_msr_list();
@@ -2617,6 +2631,8 @@ int kvm_arch_init(void *opaque)
PT_DIRTY_MASK, PT64_NX_MASK, 0, 0);
return 0;
+out_clear_crash:
+ clear_virt_disable_func();
out_clear_ops:
kvm_x86_ops = NULL;
out:
@@ -2625,6 +2641,7 @@ out:
void kvm_arch_exit(void)
{
+ clear_virt_disable_func();
kvm_x86_ops = NULL;
kvm_mmu_module_exit();
}
--
1.5.5.GIT
[prev in list] [next in list] [prev in thread] [next in thread]
Configure |
About |
News |
Add a list |
Sponsored by KoreLogic