The patch titled
KVM: reload kernel-mode host fs and gs segment bases on i386
has been removed from the -mm tree. Its filename was
kvm-load-i386-segment-bases.patch
This patch was dropped because it was folded into kvm-userspace-interface.patch
------------------------------------------------------
Subject: KVM: reload kernel-mode host fs and gs segment bases on i386
From: Avi Kivity <avi@xxxxxxxxxxxx>
The segment reload code missed the case where either fs and gs were a
kernel segment with a nonzero base address. This caused an oops with
the pda patches, where per-cpu data is accessed through such segments
Signed-off-by: Avi Kivity <avi@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/kvm/kvm_main.c | 3 +++
drivers/kvm/vmx.c | 3 +++
2 files changed, 6 insertions(+)
diff -puN drivers/kvm/kvm_main.c~kvm-load-i386-segment-bases drivers/kvm/kvm_main.c
--- a/drivers/kvm/kvm_main.c~kvm-load-i386-segment-bases
+++ a/drivers/kvm/kvm_main.c
@@ -101,6 +101,9 @@ unsigned long segment_base(u16 selector)
typedef unsigned long ul;
unsigned long v;
+ if (selector == 0)
+ return 0;
+
asm ("sgdt %0" : "=m"(gdt));
table_base = gdt.base;
diff -puN drivers/kvm/vmx.c~kvm-load-i386-segment-bases drivers/kvm/vmx.c
--- a/drivers/kvm/vmx.c~kvm-load-i386-segment-bases
+++ a/drivers/kvm/vmx.c
@@ -1692,6 +1692,9 @@ again:
#ifdef __x86_64__
vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE));
vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE));
+#else
+ vmcs_writel(HOST_FS_BASE, segment_base(fs_sel));
+ vmcs_writel(HOST_GS_BASE, segment_base(gs_sel));
#endif
if (vcpu->irq_summary &&
_
Patches currently in -mm which might be from avi@xxxxxxxxxxxx are
origin.patch
kvm-userspace-interface.patch
kvm-load-i386-segment-bases.patch
-
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