The patch titled
KVM: AMD SVM: Save and restore the floating point unit state
has been added to the -mm tree. Its filename is
kvm-amd-svm-save-and-restore-the-floating-point-unit.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: AMD SVM: Save and restore the floating point unit state
From: Avi Kivity <avi@xxxxxxxxxxxx>
Fixes sf bug 1614113 (segfaults in nbench).
Signed-off-by: Avi Kivity <avi@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/kvm/svm.c | 9 +++++++++
1 files changed, 9 insertions(+)
diff -puN drivers/kvm/svm.c~kvm-amd-svm-save-and-restore-the-floating-point-unit drivers/kvm/svm.c
--- a/drivers/kvm/svm.c~kvm-amd-svm-save-and-restore-the-floating-point-unit
+++ a/drivers/kvm/svm.c
@@ -575,6 +575,8 @@ static int svm_create_vcpu(struct kvm_vc
memset(vcpu->svm->db_regs, 0, sizeof(vcpu->svm->db_regs));
init_vmcb(vcpu->svm->vmcb);
+ fx_init(vcpu);
+
return 0;
out2:
@@ -1387,6 +1389,10 @@ again:
save_db_regs(vcpu->svm->host_db_regs);
load_db_regs(vcpu->svm->db_regs);
}
+
+ fx_save(vcpu->host_fx_image);
+ fx_restore(vcpu->guest_fx_image);
+
asm volatile (
#ifdef CONFIG_X86_64
"push %%rbx; push %%rcx; push %%rdx;"
@@ -1496,6 +1502,9 @@ again:
#endif
: "cc", "memory" );
+ fx_save(vcpu->guest_fx_image);
+ fx_restore(vcpu->host_fx_image);
+
if ((vcpu->svm->vmcb->save.dr7 & 0xff))
load_db_regs(vcpu->svm->host_db_regs);
_
Patches currently in -mm which might be from avi@xxxxxxxxxxxx are
origin.patch
kvm-add-missing-include.patch
kvm-put-kvm-in-a-new-virtualization-menu.patch
kvm-clean-up-amd-svm-debug-registers-load-and-unload.patch
kvm-replace-__x86_64__-with-config_x86_64.patch
kvm-make-the-get_sregs-and-set_sregs-ioctls-symmetric.patch
kvm-move-find_vmx_entry-to-vmxc.patch
kvm-remove-extranous-put_cpu-from-vcpu_put.patch
kvm-mmu-ignore-pcd-pwt-and-pat-bits-on-ptes.patch
kvm-add-maintainers-entry.patch
kvm-disallow-the-kvm-amd-module-on-intel-hardware.patch
kvm-dont-touch-the-virtual-apic-vt-registers-on-32-bit.patch
kvm-fix-vmx-hardware_enable-on-macbooks.patch
kvm-add-valid_vcpu-helper.patch
kvm-amd-svm-handle-msr_star-in-32-bit-mode.patch
kvm-amd-svm-save-and-restore-the-floating-point-unit.patch
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