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Subject[PATCH 13/15] kvm: svm: register virt_disable function on hardware_setup
Date
Call set_virt_disable_func() on hardware_setup, and clear it on
hardware_unsetup.

This way kdump and reboot code will be able to disable svm when needed.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
arch/x86/kvm/svm.c | 19 +++++++++++++++----
1 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 3d330a2..8f9256d 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -27,6 +27,7 @@
#include <linux/sched.h>

#include <asm/desc.h>
+#include <asm/virtext.h>

#define __ex(x) __kvm_handle_fault_on_reboot(x)

@@ -422,10 +423,16 @@ static __init int svm_hardware_setup(void)
void *iopm_va;
int r;

+ r = set_virt_disable_func(__svm_hardware_disable);
+ if (r)
+ goto err;
+
iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER);

- if (!iopm_pages)
- return -ENOMEM;
+ if (!iopm_pages) {
+ r = -ENOMEM;
+ goto err_clear_virt_disable;
+ }

iopm_va = page_address(iopm_pages);
memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
@@ -438,7 +445,7 @@ static __init int svm_hardware_setup(void)
for_each_online_cpu(cpu) {
r = svm_cpu_init(cpu);
if (r)
- goto err;
+ goto err_free_iopm;
}

svm_features = cpuid_edx(SVM_CPUID_FUNC);
@@ -459,9 +466,12 @@ static __init int svm_hardware_setup(void)

return 0;

-err:
+err_free_iopm:
__free_pages(iopm_pages, IOPM_ALLOC_ORDER);
iopm_base = 0;
+err_clear_virt_disable:
+ clear_virt_disable_func();
+err:
return r;
}

@@ -474,6 +484,7 @@ static __exit void svm_hardware_unsetup(void)

__free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER);
iopm_base = 0;
+ clear_virt_disable_func();
}

static void init_seg(struct vmcb_seg *seg)
--
1.5.5.GIT


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