- Basic hypervisor.h and interface.h definitions. - Skeleton enlighten.c, set xen_start_info to an empty struct. - Make xen_initial_domain dependent on the SIF_PRIVILIGED_BIT.
The new code only compiles when CONFIG_XEN is set, that is going to be added to arch/arm/Kconfig in patch #11 "xen/arm: introduce CONFIG_XEN on ARM".
Changes in v3:
- improve comments.
Signed-off-by: Stefano Stabellini stefano.stabellini@eu.citrix.com Acked-by: Konrad Rzeszutek Wilk konrad.wilk@oracle.com --- arch/arm/Makefile | 1 + arch/arm/include/asm/hypervisor.h | 6 +++ arch/arm/include/asm/xen/hypervisor.h | 19 ++++++++++ arch/arm/include/asm/xen/interface.h | 65 +++++++++++++++++++++++++++++++++ arch/arm/xen/Makefile | 1 + arch/arm/xen/enlighten.c | 35 ++++++++++++++++++ include/xen/xen.h | 2 +- 7 files changed, 128 insertions(+), 1 deletions(-) create mode 100644 arch/arm/include/asm/hypervisor.h create mode 100644 arch/arm/include/asm/xen/hypervisor.h create mode 100644 arch/arm/include/asm/xen/interface.h create mode 100644 arch/arm/xen/Makefile create mode 100644 arch/arm/xen/enlighten.c
diff --git a/arch/arm/Makefile b/arch/arm/Makefile index 0298b00..70aaa82 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -246,6 +246,7 @@ endif core-$(CONFIG_FPE_NWFPE) += arch/arm/nwfpe/ core-$(CONFIG_FPE_FASTFPE) += $(FASTFPE_OBJ) core-$(CONFIG_VFP) += arch/arm/vfp/ +core-$(CONFIG_XEN) += arch/arm/xen/
# If we have a machine-specific directory, then include it in the build. core-y += arch/arm/kernel/ arch/arm/mm/ arch/arm/common/ diff --git a/arch/arm/include/asm/hypervisor.h b/arch/arm/include/asm/hypervisor.h new file mode 100644 index 0000000..b90d9e5 --- /dev/null +++ b/arch/arm/include/asm/hypervisor.h @@ -0,0 +1,6 @@ +#ifndef _ASM_ARM_HYPERVISOR_H +#define _ASM_ARM_HYPERVISOR_H + +#include <asm/xen/hypervisor.h> + +#endif diff --git a/arch/arm/include/asm/xen/hypervisor.h b/arch/arm/include/asm/xen/hypervisor.h new file mode 100644 index 0000000..d7ab99a --- /dev/null +++ b/arch/arm/include/asm/xen/hypervisor.h @@ -0,0 +1,19 @@ +#ifndef _ASM_ARM_XEN_HYPERVISOR_H +#define _ASM_ARM_XEN_HYPERVISOR_H + +extern struct shared_info *HYPERVISOR_shared_info; +extern struct start_info *xen_start_info; + +/* Lazy mode for batching updates / context switch */ +enum paravirt_lazy_mode { + PARAVIRT_LAZY_NONE, + PARAVIRT_LAZY_MMU, + PARAVIRT_LAZY_CPU, +}; + +static inline enum paravirt_lazy_mode paravirt_get_lazy_mode(void) +{ + return PARAVIRT_LAZY_NONE; +} + +#endif /* _ASM_ARM_XEN_HYPERVISOR_H */ diff --git a/arch/arm/include/asm/xen/interface.h b/arch/arm/include/asm/xen/interface.h new file mode 100644 index 0000000..9e0ec5a --- /dev/null +++ b/arch/arm/include/asm/xen/interface.h @@ -0,0 +1,65 @@ +/****************************************************************************** + * Guest OS interface to ARM Xen. + * + * Stefano Stabellini stefano.stabellini@eu.citrix.com, Citrix, 2012 + */ + +#ifndef _ASM_ARM_XEN_INTERFACE_H +#define _ASM_ARM_XEN_INTERFACE_H + +#include <linux/types.h> + +#define __DEFINE_GUEST_HANDLE(name, type) \ + typedef type * __guest_handle_ ## name + +#define DEFINE_GUEST_HANDLE_STRUCT(name) \ + __DEFINE_GUEST_HANDLE(name, struct name) +#define DEFINE_GUEST_HANDLE(name) __DEFINE_GUEST_HANDLE(name, name) +#define GUEST_HANDLE(name) __guest_handle_ ## name + +#define set_xen_guest_handle(hnd, val) \ + do { \ + if (sizeof(hnd) == 8) \ + *(uint64_t *)&(hnd) = 0; \ + (hnd) = val; \ + } while (0) + +#ifndef __ASSEMBLY__ +/* Guest handles for primitive C types. */ +__DEFINE_GUEST_HANDLE(uchar, unsigned char); +__DEFINE_GUEST_HANDLE(uint, unsigned int); +__DEFINE_GUEST_HANDLE(ulong, unsigned long); +DEFINE_GUEST_HANDLE(char); +DEFINE_GUEST_HANDLE(int); +DEFINE_GUEST_HANDLE(long); +DEFINE_GUEST_HANDLE(void); +DEFINE_GUEST_HANDLE(uint64_t); +DEFINE_GUEST_HANDLE(uint32_t); + +/* Maximum number of virtual CPUs in multi-processor guests. */ +#define MAX_VIRT_CPUS 1 + +struct arch_vcpu_info { }; +struct arch_shared_info { }; + +/* TODO: Move pvclock definitions some place arch independent */ +struct pvclock_vcpu_time_info { + u32 version; + u32 pad0; + u64 tsc_timestamp; + u64 system_time; + u32 tsc_to_system_mul; + s8 tsc_shift; + u8 flags; + u8 pad[2]; +} __attribute__((__packed__)); /* 32 bytes */ + +/* It is OK to have a 12 bytes struct with no padding because it is packed */ +struct pvclock_wall_clock { + u32 version; + u32 sec; + u32 nsec; +} __attribute__((__packed__)); +#endif + +#endif /* _ASM_ARM_XEN_INTERFACE_H */ diff --git a/arch/arm/xen/Makefile b/arch/arm/xen/Makefile new file mode 100644 index 0000000..0bad594 --- /dev/null +++ b/arch/arm/xen/Makefile @@ -0,0 +1 @@ +obj-y := enlighten.o diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c new file mode 100644 index 0000000..c535540 --- /dev/null +++ b/arch/arm/xen/enlighten.c @@ -0,0 +1,35 @@ +#include <xen/xen.h> +#include <xen/interface/xen.h> +#include <xen/interface/memory.h> +#include <xen/platform_pci.h> +#include <asm/xen/hypervisor.h> +#include <asm/xen/hypercall.h> +#include <linux/module.h> + +struct start_info _xen_start_info; +struct start_info *xen_start_info = &_xen_start_info; +EXPORT_SYMBOL_GPL(xen_start_info); + +enum xen_domain_type xen_domain_type = XEN_NATIVE; +EXPORT_SYMBOL_GPL(xen_domain_type); + +struct shared_info xen_dummy_shared_info; +struct shared_info *HYPERVISOR_shared_info = (void *)&xen_dummy_shared_info; + +DEFINE_PER_CPU(struct vcpu_info *, xen_vcpu); + +/* TODO: to be removed */ +__read_mostly int xen_have_vector_callback; +EXPORT_SYMBOL_GPL(xen_have_vector_callback); + +int xen_platform_pci_unplug = XEN_UNPLUG_ALL; +EXPORT_SYMBOL_GPL(xen_platform_pci_unplug); + +int xen_remap_domain_mfn_range(struct vm_area_struct *vma, + unsigned long addr, + unsigned long mfn, int nr, + pgprot_t prot, unsigned domid) +{ + return -ENOSYS; +} +EXPORT_SYMBOL_GPL(xen_remap_domain_mfn_range); diff --git a/include/xen/xen.h b/include/xen/xen.h index a164024..2c0d3a5 100644 --- a/include/xen/xen.h +++ b/include/xen/xen.h @@ -23,7 +23,7 @@ extern enum xen_domain_type xen_domain_type; #include <xen/interface/xen.h> #include <asm/xen/hypervisor.h>
-#define xen_initial_domain() (xen_pv_domain() && \ +#define xen_initial_domain() (xen_domain() && \ xen_start_info->flags & SIF_INITDOMAIN) #else /* !CONFIG_XEN_DOM0 */ #define xen_initial_domain() (0)