[Qemu-devel] [PATCH 059/156] target-i386: fix set of registers zeroed on reset

[Michael Roth]

From: Paolo Bonzini <address@hidden>

BND0-3, BNDCFGU, BNDCFGS, BNDSTATUS were not zeroed on reset, but they
should be (Intel Instruction Set Extensions Programming Reference
319433-015, pages 9-4 and 9-6).  Same for YMM.

XCR0 should be reset to 1.

TSC and TSC_RESET were zeroed already by the memset, remove the explicit
assignments.

Cc: Andreas Faerber <address@hidden>
Reviewed-by: Michael S. Tsirkin <address@hidden>
Signed-off-by: Paolo Bonzini <address@hidden>
(cherry picked from commit 05e7e819d7d159a75a46354aead95e1199b8f168)

Conflicts:
        target-i386/cpu.c
        target-i386/cpu.h

*removed dependency on 79e9ebeb

Signed-off-by: Michael Roth <address@hidden>
---
 target-i386/cpu.c | 2 ++
 target-i386/cpu.h | 4 ++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 47af9a8..654a04e 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -2446,6 +2446,8 @@ static void x86_cpu_reset(CPUState *s)
     cpu_breakpoint_remove_all(env, BP_CPU);
     cpu_watchpoint_remove_all(env, BP_CPU);
 
+    env->xcr0 = 1;
+
 #if !defined(CONFIG_USER_ONLY)
     /* We hard-wire the BSP to the first CPU. */
     if (s->cpu_index == 0) {
diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index ea373e8..199f407 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -801,6 +801,8 @@ typedef struct CPUX86State {
     XMMReg xmm_t0;
     MMXReg mmx_t0;
 
+    XMMReg ymmh_regs[CPU_NB_REGS];
+
     /* sysenter registers */
     uint32_t sysenter_cs;
     target_ulong sysenter_esp;
@@ -909,9 +911,7 @@ typedef struct CPUX86State {
     uint16_t fpus_vmstate;
     uint16_t fptag_vmstate;
     uint16_t fpregs_format_vmstate;
-
     uint64_t xstate_bv;
-    XMMReg ymmh_regs[CPU_NB_REGS];
 
     uint64_t xcr0;
 
-- 
1.9.1