This is needed for the introspection subsystem to track the changes to
descriptor table registers.
CC: Joerg Roedel <joro@xxxxxxxxxx>
Signed-off-by: Adalbert Lazăr <alazar@xxxxxxxxxxxxxxx>
---
arch/x86/kvm/x86.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 7aef002be551..c28e2a20dec2 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5185,11 +5185,14 @@ static int kvm_write_guest_virt_helper(gva_t addr, void *val, unsigned int bytes
if (gpa == UNMAPPED_GVA)
return X86EMUL_PROPAGATE_FAULT;
+ if (!kvm_page_track_prewrite(vcpu, gpa, addr, data, towrite))
+ return X86EMUL_RETRY_INSTR;
ret = kvm_vcpu_write_guest(vcpu, gpa, data, towrite);
if (ret < 0) {
r = X86EMUL_IO_NEEDED;
goto out;
}
+ kvm_page_track_write(vcpu, gpa, addr, data, towrite);
bytes -= towrite;
data += towrite;
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