From 1e8e3c4fe380a2a0ed88f7a92f5bcb8600ab1258 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Mon, 22 Jul 2019 18:22:03 +0100
Subject: [PATCH 22/39] i386: Save EFER for 32-bit targets

RH-Author: Paolo Bonzini <pbonzini@redhat.com>
Message-id: <20190722182220.19374-2-pbonzini@redhat.com>
Patchwork-id: 89619
O-Subject: [RHEL-8.1.0 PATCH qemu-kvm v3 01/18] i386: Save EFER for 32-bit targets
Bugzilla: 1689269
RH-Acked-by: Peter Xu <zhexu@redhat.com>
RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

From: Pavel Dovgalyuk <pavel.dovgaluk@gmail.com>

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>
(cherry picked from commit 89a44a103315267122119b4311218d00d2561ebe)

Signed-off-by: Danilo C. L. de Paula <ddepaula@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 2a85c91..561d4a5 100644
--- a/target/i386/machine.c
+++ b/target/i386/machine.c
@@ -932,6 +932,27 @@ static const VMStateDescription vmstate_msr_virt_ssbd = {
     }
 };
 
+#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,
@@ -1056,6 +1077,9 @@ VMStateDescription vmstate_x86_cpu = {
         &vmstate_msr_intel_pt,
         &vmstate_xsave,
         &vmstate_msr_virt_ssbd,
+#ifndef TARGET_X86_64
+        &vmstate_efer32,
+#endif
         NULL
     }
 };
-- 
1.8.3.1