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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [RFC PATCH v4 08/11] xen: arm: implement platform hypercall
This patch enables xsm_platform_op hook for all architectures
and implements platform hypercall for ARM.
Signed-off-by: Oleksandr Dmytryshyn <oleksandr.dmytryshyn@xxxxxxxxxxxxxxx>
---
xen/arch/arm/Makefile | 1 +
xen/arch/arm/platform_hypercall.c | 84 +++++++++++++++++++++++++++++++++++++++
xen/arch/arm/traps.c | 1 +
xen/include/xsm/dummy.h | 12 +++---
xen/include/xsm/xsm.h | 10 ++---
xen/xsm/flask/hooks.c | 3 +-
6 files changed, 99 insertions(+), 12 deletions(-)
create mode 100644 xen/arch/arm/platform_hypercall.c
diff --git a/xen/arch/arm/Makefile b/xen/arch/arm/Makefile
index d70f6d5..54d8258 100644
--- a/xen/arch/arm/Makefile
+++ b/xen/arch/arm/Makefile
@@ -32,6 +32,7 @@ obj-y += vuart.o
obj-y += hvm.o
obj-y += device.o
obj-y += decode.o
+obj-y += platform_hypercall.o
#obj-bin-y += ....o
diff --git a/xen/arch/arm/platform_hypercall.c
b/xen/arch/arm/platform_hypercall.c
new file mode 100644
index 0000000..f14641b
--- /dev/null
+++ b/xen/arch/arm/platform_hypercall.c
@@ -0,0 +1,84 @@
+/******************************************************************************
+ * platform_hypercall.c
+ *
+ * Hardware platform operations. Intended for use by domain-0 kernel.
+ *
+ * Copyright (c) 2014 GlobalLogic Inc.
+ */
+
+#include <xen/config.h>
+#include <xen/types.h>
+#include <xen/sched.h>
+#include <xen/event.h>
+#include <xen/guest_access.h>
+#include <xen/pmstat.h>
+#include <xen/irq.h>
+#include <public/platform.h>
+#include <xsm/xsm.h>
+
+static DEFINE_SPINLOCK(xenpf_lock);
+
+long do_platform_op(XEN_GUEST_HANDLE_PARAM(xen_platform_op_t) u_xenpf_op)
+{
+ long ret = 0;
+ struct xen_platform_op curop, *op = &curop;
+
+ if ( copy_from_guest(op, u_xenpf_op, 1) )
+ return -EFAULT;
+
+ if ( op->interface_version != XENPF_INTERFACE_VERSION )
+ return -EACCES;
+
+ ret = xsm_platform_op(XSM_PRIV, op->cmd);
+ if ( ret )
+ return ret;
+
+ /*
+ * Trylock here avoids deadlock with an existing platform critical section
+ * which might (for some current or future reason) want to synchronise
+ * with this vcpu.
+ */
+ while ( !spin_trylock(&xenpf_lock) )
+ if ( hypercall_preempt_check() )
+ return hypercall_create_continuation(
+ __HYPERVISOR_platform_op, "h", u_xenpf_op);
+
+ switch ( op->cmd )
+ {
+ case XENPF_set_processor_pminfo:
+ switch ( op->u.set_pminfo.type )
+ {
+ case XEN_PM_PX:
+ if ( !(xen_processor_pmbits & XEN_PROCESSOR_PM_PX) )
+ {
+ ret = -ENOSYS;
+ break;
+ }
+#ifdef HAS_CPUFREQ
+ ret = set_px_pminfo(op->u.set_pminfo.id, &op->u.set_pminfo.u.perf);
+#else
+ ret = -EINVAL;
+#endif
+ break;
+
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ break;
+ }
+
+ spin_unlock(&xenpf_lock);
+
+ return ret;
+}
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
diff --git a/xen/arch/arm/traps.c b/xen/arch/arm/traps.c
index 21c7b26..d1b0014 100644
--- a/xen/arch/arm/traps.c
+++ b/xen/arch/arm/traps.c
@@ -1012,6 +1012,7 @@ static arm_hypercall_t arm_hypercall_table[] = {
HYPERCALL(hvm_op, 2),
HYPERCALL(grant_table_op, 3),
HYPERCALL_ARM(vcpu_op, 3),
+ HYPERCALL(platform_op, 1),
};
typedef int (*arm_psci_fn_t)(uint32_t, register_t);
diff --git a/xen/include/xsm/dummy.h b/xen/include/xsm/dummy.h
index eb9e1a1..911fb5d 100644
--- a/xen/include/xsm/dummy.h
+++ b/xen/include/xsm/dummy.h
@@ -491,6 +491,12 @@ static XSM_INLINE int xsm_hvm_param_nested(XSM_DEFAULT_ARG
struct domain *d)
return xsm_default_action(action, current->domain, d);
}
+static XSM_INLINE int xsm_platform_op(XSM_DEFAULT_ARG uint32_t op)
+{
+ XSM_ASSERT_ACTION(XSM_PRIV);
+ return xsm_default_action(action, current->domain, NULL);
+}
+
#ifdef CONFIG_X86
static XSM_INLINE int xsm_shadow_control(XSM_DEFAULT_ARG struct domain *d,
uint32_t op)
{
@@ -546,12 +552,6 @@ static XSM_INLINE int xsm_apic(XSM_DEFAULT_ARG struct
domain *d, int cmd)
return xsm_default_action(action, d, NULL);
}
-static XSM_INLINE int xsm_platform_op(XSM_DEFAULT_ARG uint32_t op)
-{
- XSM_ASSERT_ACTION(XSM_PRIV);
- return xsm_default_action(action, current->domain, NULL);
-}
-
static XSM_INLINE int xsm_machine_memory_map(XSM_DEFAULT_VOID)
{
XSM_ASSERT_ACTION(XSM_PRIV);
diff --git a/xen/include/xsm/xsm.h b/xen/include/xsm/xsm.h
index 1939453..5cb1e0d 100644
--- a/xen/include/xsm/xsm.h
+++ b/xen/include/xsm/xsm.h
@@ -509,6 +509,11 @@ static inline int xsm_hvm_param_nested (xsm_default_t def,
struct domain *d)
return xsm_ops->hvm_param_nested(d);
}
+static inline int xsm_platform_op (xsm_default_t def, uint32_t op)
+{
+ return xsm_ops->platform_op(op);
+}
+
#ifdef CONFIG_X86
static inline int xsm_shadow_control (xsm_default_t def, struct domain *d,
uint32_t op)
{
@@ -560,11 +565,6 @@ static inline int xsm_memtype (xsm_default_t def, uint32_t
access)
return xsm_ops->memtype(access);
}
-static inline int xsm_platform_op (xsm_default_t def, uint32_t op)
-{
- return xsm_ops->platform_op(op);
-}
-
static inline int xsm_machine_memory_map(xsm_default_t def)
{
return xsm_ops->machine_memory_map();
diff --git a/xen/xsm/flask/hooks.c b/xen/xsm/flask/hooks.c
index d94ab77..29126ec 100644
--- a/xen/xsm/flask/hooks.c
+++ b/xen/xsm/flask/hooks.c
@@ -1542,6 +1542,8 @@ static struct xsm_operations flask_ops = {
.add_to_physmap = flask_add_to_physmap,
.remove_from_physmap = flask_remove_from_physmap,
+ .platform_op = flask_platform_op,
+
#ifdef CONFIG_X86
.shadow_control = flask_shadow_control,
.hvm_set_pci_intx_level = flask_hvm_set_pci_intx_level,
@@ -1552,7 +1554,6 @@ static struct xsm_operations flask_ops = {
.mem_event_op = flask_mem_event_op,
.mem_sharing_op = flask_mem_sharing_op,
.apic = flask_apic,
- .platform_op = flask_platform_op,
.machine_memory_map = flask_machine_memory_map,
.domain_memory_map = flask_domain_memory_map,
.mmu_update = flask_mmu_update,
--
1.9.1
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