[Xen-devel] [PATCH v4 2/9] xen/arm: Add more registers for saving and restoring vcpu registers

[Jaeyong Yoo <jaeyong.yoo@xxxxxxxxxxx>]

Add more registers for saving and restoring vcpu registers for live migration.
Those registers are selected from the registers stored when vcpu context 
switching.

Signed-off-by: Jaeyong Yoo <jaeyong.yoo@xxxxxxxxxxx>
---
 tools/include/xen-foreign/reference.size |  2 +-
 xen/arch/arm/domain.c                    | 34 +++++++++++++++++++++++++++++++
 xen/arch/arm/domctl.c                    | 35 ++++++++++++++++++++++++++++++++
 xen/include/public/arch-arm.h            | 35 ++++++++++++++++++++++++++++++++
 4 files changed, 105 insertions(+), 1 deletion(-)

diff --git a/tools/include/xen-foreign/reference.size 
b/tools/include/xen-foreign/reference.size
index b3347b4..dd7b0f8 100644
--- a/tools/include/xen-foreign/reference.size
+++ b/tools/include/xen-foreign/reference.size
@@ -5,7 +5,7 @@ start_info                |       -       -    1112    1168
 trap_info                 |       -       -       8      16
 cpu_user_regs             |       -       -      68     200
 vcpu_guest_core_regs      |     304     304       -       -
-vcpu_guest_context        |     336     336    2800    5168
+vcpu_guest_context        |     440     440    2800    5168
 arch_vcpu_info            |       0       0      24      16
 vcpu_time_info            |      32      32      32      32
 vcpu_info                 |      48      48      64      64
diff --git a/xen/arch/arm/domain.c b/xen/arch/arm/domain.c
index cb0424d..d3bac4d 100644
--- a/xen/arch/arm/domain.c
+++ b/xen/arch/arm/domain.c
@@ -601,6 +601,40 @@ int arch_set_info_guest(
     v->arch.ttbr1 = ctxt->ttbr1;
     v->arch.ttbcr = ctxt->ttbcr;
 
+    v->arch.dacr = ctxt->dacr;
+    v->arch.ifar = ctxt->ifar;
+    v->arch.ifsr = ctxt->ifsr;
+    v->arch.dfar = ctxt->dfar;
+    v->arch.dfsr = ctxt->dfsr;
+
+#ifdef CONFIG_ARM_32
+    v->arch.mair0 = ctxt->mair0;
+    v->arch.mair1 = ctxt->mair1;
+#else
+    v->arch.mair = ctxt->mair;
+#endif
+
+    /* Control Registers */
+    v->arch.actlr = ctxt->actlr;
+    v->arch.cpacr = ctxt->cpacr;
+
+    v->arch.contextidr = ctxt->contextidr;
+    v->arch.tpidr_el0 = ctxt->tpidr_el0;
+    v->arch.tpidr_el1 = ctxt->tpidr_el1;
+    v->arch.tpidrro_el0 = ctxt->tpidrro_el0;
+
+    /* CP 15 */
+    v->arch.csselr = ctxt->csselr;
+
+    v->arch.afsr0 = ctxt->afsr0;
+    v->arch.afsr1 = ctxt->afsr1;
+    v->arch.vbar = ctxt->vbar;
+    v->arch.par = ctxt->par;
+    v->arch.teecr = ctxt->teecr;
+    v->arch.teehbr = ctxt->teehbr;
+    v->arch.joscr = ctxt->joscr;
+    v->arch.jmcr = ctxt->jmcr;
+
     v->is_initialised = 1;
 
     if ( ctxt->flags & VGCF_online )
diff --git a/xen/arch/arm/domctl.c b/xen/arch/arm/domctl.c
index 86c07de..78fb322 100644
--- a/xen/arch/arm/domctl.c
+++ b/xen/arch/arm/domctl.c
@@ -115,6 +115,41 @@ void arch_get_info_guest(struct vcpu *v, 
vcpu_guest_context_u c)
     ctxt->ttbr1 = v->arch.ttbr1;
     ctxt->ttbcr = v->arch.ttbcr;
 
+    ctxt->dacr = v->arch.dacr;
+    ctxt->ifar = v->arch.ifar;
+    ctxt->ifsr = v->arch.ifsr;
+    ctxt->dfar = v->arch.dfar;
+    ctxt->dfsr = v->arch.dfsr;
+
+#ifdef CONFIG_ARM_32
+    ctxt->mair0 = v->arch.mair0;
+    ctxt->mair1 = v->arch.mair1;
+#else
+    ctxt->mair = v->arch.mair;
+#endif
+
+    /* Control Registers */
+    ctxt->actlr = v->arch.actlr;
+    ctxt->sctlr = v->arch.sctlr;
+    ctxt->cpacr = v->arch.cpacr;
+
+    ctxt->contextidr = v->arch.contextidr;
+    ctxt->tpidr_el0 = v->arch.tpidr_el0;
+    ctxt->tpidr_el1 = v->arch.tpidr_el1;
+    ctxt->tpidrro_el0 = v->arch.tpidrro_el0;
+
+    /* CP 15 */
+    ctxt->csselr = v->arch.csselr;
+
+    ctxt->afsr0 = v->arch.afsr0;
+    ctxt->afsr1 = v->arch.afsr1;
+    ctxt->vbar = v->arch.vbar;
+    ctxt->par = v->arch.par;
+    ctxt->teecr = v->arch.teecr;
+    ctxt->teehbr = v->arch.teehbr;
+    ctxt->joscr = v->arch.joscr;
+    ctxt->jmcr = v->arch.jmcr;
+
     if ( !test_bit(_VPF_down, &v->pause_flags) )
         ctxt->flags |= VGCF_online;
 }
diff --git a/xen/include/public/arch-arm.h b/xen/include/public/arch-arm.h
index 5d359af..bf6dc9a 100644
--- a/xen/include/public/arch-arm.h
+++ b/xen/include/public/arch-arm.h
@@ -253,6 +253,41 @@ struct vcpu_guest_context {
 
     uint32_t sctlr, ttbcr;
     uint64_t ttbr0, ttbr1;
+    uint32_t ifar, dfar;
+    uint32_t ifsr, dfsr;
+    uint32_t dacr;
+    uint64_t par;
+
+#ifdef CONFIG_ARM_32
+    uint32_t mair0, mair1;
+    uint32_t tpidr_el0;
+    uint32_t tpidr_el1;
+    uint32_t tpidrro_el0;
+    uint32_t vbar;
+#else
+    uint64_t mair;
+    uint64_t tpidr_el0;
+    uint64_t tpidr_el1;
+    uint64_t tpidrro_el0;
+    uint64_t vbar;
+#endif
+
+    /* Control Registers */
+    uint32_t actlr;
+    uint32_t cpacr;
+
+    uint32_t afsr0, afsr1;
+
+    uint32_t contextidr;
+
+    uint32_t teecr, teehbr; /* ThumbEE, 32-bit guests only */
+
+#ifdef CONFIG_ARM_32
+    uint32_t joscr, jmcr;
+#endif
+
+    /* CP 15 */
+    uint32_t csselr;
 };
 typedef struct vcpu_guest_context vcpu_guest_context_t;
 DEFINE_XEN_GUEST_HANDLE(vcpu_guest_context_t);
-- 
1.8.1.2


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