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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH RFC v2 1/9] xen-arm: Implement basic save/load for hvm context
Create a hvm directory for arm and move all the hvm related files
to that directory.
Signed-off-by: Jaeyong Yoo <jaeyong.yoo@xxxxxxxxxxx>
---
xen/arch/arm/Makefile | 2 +-
xen/arch/arm/hvm.c | 67 ----------------------------------
xen/arch/arm/hvm/Makefile | 2 +
xen/arch/arm/hvm/hvm.c | 67 ++++++++++++++++++++++++++++++++++
xen/arch/arm/hvm/save.c | 66 +++++++++++++++++++++++++++++++++
xen/include/asm-arm/hvm/support.h | 29 +++++++++++++++
xen/include/public/arch-arm/hvm/save.h | 17 +++++++++
7 files changed, 182 insertions(+), 68 deletions(-)
delete mode 100644 xen/arch/arm/hvm.c
create mode 100644 xen/arch/arm/hvm/Makefile
create mode 100644 xen/arch/arm/hvm/hvm.c
create mode 100644 xen/arch/arm/hvm/save.c
create mode 100644 xen/include/asm-arm/hvm/support.h
diff --git a/xen/arch/arm/Makefile b/xen/arch/arm/Makefile
index 87fabe1..0d43539 100644
--- a/xen/arch/arm/Makefile
+++ b/xen/arch/arm/Makefile
@@ -1,6 +1,7 @@
subdir-$(arm32) += arm32
subdir-$(arm64) += arm64
subdir-y += platforms
+subdir-y += hvm
obj-$(EARLY_PRINTK) += early_printk.o
obj-y += cpu.o
@@ -28,7 +29,6 @@ obj-y += traps.o
obj-y += vgic.o
obj-y += vtimer.o
obj-y += vpl011.o
-obj-y += hvm.o
obj-y += device.o
#obj-bin-y += ....o
diff --git a/xen/arch/arm/hvm.c b/xen/arch/arm/hvm.c
deleted file mode 100644
index 471c4cd..0000000
--- a/xen/arch/arm/hvm.c
+++ /dev/null
@@ -1,67 +0,0 @@
-#include <xen/config.h>
-#include <xen/init.h>
-#include <xen/lib.h>
-#include <xen/errno.h>
-#include <xen/guest_access.h>
-#include <xen/sched.h>
-
-#include <xsm/xsm.h>
-
-#include <public/xen.h>
-#include <public/hvm/params.h>
-#include <public/hvm/hvm_op.h>
-
-#include <asm/hypercall.h>
-
-long do_hvm_op(unsigned long op, XEN_GUEST_HANDLE_PARAM(void) arg)
-
-{
- long rc = 0;
-
- switch ( op )
- {
- case HVMOP_set_param:
- case HVMOP_get_param:
- {
- struct xen_hvm_param a;
- struct domain *d;
-
- if ( copy_from_guest(&a, arg, 1) )
- return -EFAULT;
-
- if ( a.index >= HVM_NR_PARAMS )
- return -EINVAL;
-
- d = rcu_lock_domain_by_any_id(a.domid);
- if ( d == NULL )
- return -ESRCH;
-
- rc = xsm_hvm_param(XSM_TARGET, d, op);
- if ( rc )
- goto param_fail;
-
- if ( op == HVMOP_set_param )
- {
- d->arch.hvm_domain.params[a.index] = a.value;
- }
- else
- {
- a.value = d->arch.hvm_domain.params[a.index];
- rc = copy_to_guest(arg, &a, 1) ? -EFAULT : 0;
- }
-
- param_fail:
- rcu_unlock_domain(d);
- break;
- }
-
- default:
- {
- printk("%s: Bad HVM op %ld.\n", __func__, op);
- rc = -ENOSYS;
- break;
- }
- }
-
- return rc;
-}
diff --git a/xen/arch/arm/hvm/Makefile b/xen/arch/arm/hvm/Makefile
new file mode 100644
index 0000000..ad38e09
--- /dev/null
+++ b/xen/arch/arm/hvm/Makefile
@@ -0,0 +1,2 @@
+obj-y += hvm.o
+obj-y += save.o
diff --git a/xen/arch/arm/hvm/hvm.c b/xen/arch/arm/hvm/hvm.c
new file mode 100644
index 0000000..471c4cd
--- /dev/null
+++ b/xen/arch/arm/hvm/hvm.c
@@ -0,0 +1,67 @@
+#include <xen/config.h>
+#include <xen/init.h>
+#include <xen/lib.h>
+#include <xen/errno.h>
+#include <xen/guest_access.h>
+#include <xen/sched.h>
+
+#include <xsm/xsm.h>
+
+#include <public/xen.h>
+#include <public/hvm/params.h>
+#include <public/hvm/hvm_op.h>
+
+#include <asm/hypercall.h>
+
+long do_hvm_op(unsigned long op, XEN_GUEST_HANDLE_PARAM(void) arg)
+
+{
+ long rc = 0;
+
+ switch ( op )
+ {
+ case HVMOP_set_param:
+ case HVMOP_get_param:
+ {
+ struct xen_hvm_param a;
+ struct domain *d;
+
+ if ( copy_from_guest(&a, arg, 1) )
+ return -EFAULT;
+
+ if ( a.index >= HVM_NR_PARAMS )
+ return -EINVAL;
+
+ d = rcu_lock_domain_by_any_id(a.domid);
+ if ( d == NULL )
+ return -ESRCH;
+
+ rc = xsm_hvm_param(XSM_TARGET, d, op);
+ if ( rc )
+ goto param_fail;
+
+ if ( op == HVMOP_set_param )
+ {
+ d->arch.hvm_domain.params[a.index] = a.value;
+ }
+ else
+ {
+ a.value = d->arch.hvm_domain.params[a.index];
+ rc = copy_to_guest(arg, &a, 1) ? -EFAULT : 0;
+ }
+
+ param_fail:
+ rcu_unlock_domain(d);
+ break;
+ }
+
+ default:
+ {
+ printk("%s: Bad HVM op %ld.\n", __func__, op);
+ rc = -ENOSYS;
+ break;
+ }
+ }
+
+ return rc;
+}
diff --git a/xen/arch/arm/hvm/save.c b/xen/arch/arm/hvm/save.c
new file mode 100644
index 0000000..0062ea8
--- /dev/null
+++ b/xen/arch/arm/hvm/save.c
@@ -0,0 +1,66 @@
+/*
+ * hvm/save.c: Save and restore HVM guest's emulated hardware state for ARM.
+ *
+ * Copyright (c) 2013, Samsung Electronics.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <asm/hvm/support.h>
+#include <public/hvm/save.h>
+
+void arch_hvm_save(struct domain *d, struct hvm_save_header *hdr)
+{
+ hdr->cpuid = READ_SYSREG32(MIDR_EL1);
+}
+
+int arch_hvm_load(struct domain *d, struct hvm_save_header *hdr)
+{
+ uint32_t cpuid;
+
+ if ( hdr->magic != HVM_FILE_MAGIC )
+ {
+ printk(XENLOG_G_ERR "HVM%d restore: bad magic number %#"PRIx32"\n",
+ d->domain_id, hdr->magic);
+ return -1;
+ }
+
+ if ( hdr->version != HVM_FILE_VERSION )
+ {
+ printk(XENLOG_G_ERR "HVM%d restore: unsupported version %u\n",
+ d->domain_id, hdr->version);
+ return -1;
+ }
+
+ cpuid = READ_SYSREG32(MIDR_EL1);
+ if ( hdr->cpuid != cpuid )
+ {
+ printk(XENLOG_G_INFO "HVM%d restore: VM saved on one CPU "
+ "(%#"PRIx32") and restored on another (%#"PRIx32").\n",
+ d->domain_id, hdr->cpuid, cpuid);
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
diff --git a/xen/include/asm-arm/hvm/support.h
b/xen/include/asm-arm/hvm/support.h
new file mode 100644
index 0000000..33390b0
--- /dev/null
+++ b/xen/include/asm-arm/hvm/support.h
@@ -0,0 +1,29 @@
+/*
+ * support.h: HVM support routines used by ARMv7 VE.
+ *
+ * Copyright (c) 2013, Samsung Electronics
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#ifndef __ASM_ARM_HVM_SUPPORT_H__
+#define __ASM_ARM_HVM_SUPPORT_H__
+
+#include <xen/types.h>
+#include <public/hvm/ioreq.h>
+#include <xen/sched.h>
+#include <xen/hvm/save.h>
+#include <asm/processor.h>
+
+#endif /* __ASM_ARM_HVM_SUPPORT_H__ */
diff --git a/xen/include/public/arch-arm/hvm/save.h
b/xen/include/public/arch-arm/hvm/save.h
index 75b8e65..fbfb2db 100644
--- a/xen/include/public/arch-arm/hvm/save.h
+++ b/xen/include/public/arch-arm/hvm/save.h
@@ -26,6 +26,23 @@
#ifndef __XEN_PUBLIC_HVM_SAVE_ARM_H__
#define __XEN_PUBLIC_HVM_SAVE_ARM_H__
+/*
+ * Save/restore header: general info about the save file.
+ */
+
+#define HVM_FILE_MAGIC 0x92385520
+#define HVM_FILE_VERSION 0x00000001
+
+struct hvm_save_header
+{
+ uint32_t magic; /* Must be HVM_FILE_MAGIC */
+ uint32_t version; /* File format version */
+ uint64_t changeset; /* Version of Xen that saved this file */
+ uint32_t cpuid; /* MIDR_EL1 on the saving machine */
+};
+
+DECLARE_HVM_SAVE_TYPE(HEADER, 1, struct hvm_save_header);
+
#endif
/*
--
1.8.1.2
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