KVM: x86 emulator: retire ->write_std()

Theoretically used to acccess memory known to be ordinary RAM, it was
never implemented.  It is questionable whether it is possible to implement
it correctly.

Signed-off-by: Avi Kivity <avi@qumranet.com>

2 files changed, 0 insertions, 21 deletions

diff --git a/drivers/kvm/x86.c b/drivers/kvm/x86.c
index 6212984a2e6c..5a54e328088d 100644
--- a/drivers/kvm/x86.c
+++ b/drivers/kvm/x86.c
@@ -1162,15 +1162,6 @@ int emulator_read_std(unsigned long addr,
 }
 EXPORT_SYMBOL_GPL(emulator_read_std);
 
-static int emulator_write_std(unsigned long addr,
-                              const void *val,
-                              unsigned int bytes,
-                              struct kvm_vcpu *vcpu)
-{
-        pr_unimpl(vcpu, "emulator_write_std: addr %lx n %d\n", addr, bytes);
-        return X86EMUL_UNHANDLEABLE;
-}
-
 static int emulator_read_emulated(unsigned long addr,
                                   void *val,
                                   unsigned int bytes,
@@ -1367,7 +1358,6 @@ EXPORT_SYMBOL_GPL(kvm_report_emulation_failure);
 
 struct x86_emulate_ops emulate_ops = {
         .read_std            = emulator_read_std,
-        .write_std           = emulator_write_std,
         .read_emulated       = emulator_read_emulated,
         .write_emulated      = emulator_write_emulated,
         .cmpxchg_emulated    = emulator_cmpxchg_emulated,
diff --git a/drivers/kvm/x86_emulate.h b/drivers/kvm/x86_emulate.h
index e34868b42c33..a62bf14bbf89 100644
--- a/drivers/kvm/x86_emulate.h
+++ b/drivers/kvm/x86_emulate.h
@@ -63,17 +63,6 @@ struct x86_emulate_ops {
                         unsigned int bytes, struct kvm_vcpu *vcpu);
 
         /*
-         * write_std: Write bytes of standard (non-emulated/special) memory.
-         *            Used for stack operations, and others.
-         *  @addr:  [IN ] Linear address to which to write.
-         *  @val:   [IN ] Value to write to memory (low-order bytes used as
-         *                required).
-         *  @bytes: [IN ] Number of bytes to write to memory.
-         */
-        int (*write_std)(unsigned long addr, const void *val,
-                         unsigned int bytes, struct kvm_vcpu *vcpu);
-
-        /*
          * read_emulated: Read bytes from emulated/special memory area.
          *  @addr:  [IN ] Linear address from which to read.
          *  @val:   [OUT] Value read from memory, zero-extended to 'u_long'.