From 89a44a103315267122119b4311218d00d2561ebe Mon Sep 17 00:00:00 2001
From: Pavel Dovgalyuk <pavel.dovgaluk@gmail.com>
Date: Wed, 29 May 2019 15:41:56 +0300
Subject: [PATCH] i386: Save EFER for 32-bit targets

i386 (32 bit) emulation uses EFER in wrmsr and in MMU fault
processing.
But it does not included in VMState, because "efer" field is disabled with

This patch adds a section for 32-bit targets which saves EFER when
it's value is non-zero.

Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Message-Id: <155913371654.8429.1659082639780315242.stgit@pasha-Precision-3630-Tower>
Reviewed-by: Peter Xu <peterx@redhat.com>
[ehabkost: indentation fix]
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 target/i386/machine.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/target/i386/machine.c b/target/i386/machine.c
index 225b5d433b..2c96cfc9a2 100644
--- a/target/i386/machine.c
+++ b/target/i386/machine.c
@@ -964,6 +964,27 @@ static const VMStateDescription vmstate_svm_npt = {
     }
 };
 
+#ifndef TARGET_X86_64
+static bool intel_efer32_needed(void *opaque)
+{
+    X86CPU *cpu = opaque;
+    CPUX86State *env = &cpu->env;
+
+    return env->efer != 0;
+}
+
+static const VMStateDescription vmstate_efer32 = {
+    .name = "cpu/efer32",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .needed = intel_efer32_needed,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINT64(env.efer, X86CPU),
+        VMSTATE_END_OF_LIST()
+    }
+};
+#endif
+
 VMStateDescription vmstate_x86_cpu = {
     .name = "cpu",
     .version_id = 12,
@@ -1089,6 +1110,9 @@ VMStateDescription vmstate_x86_cpu = {
         &vmstate_msr_intel_pt,
         &vmstate_msr_virt_ssbd,
         &vmstate_svm_npt,
+#ifndef TARGET_X86_64
+        &vmstate_efer32,
+#endif
         NULL
     }
 };