diff options
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/asm/hypervisor.h | 6 | ||||
| -rw-r--r-- | arch/arm/include/asm/sync_bitops.h | 27 | ||||
| -rw-r--r-- | arch/arm/include/asm/xen/events.h | 18 | ||||
| -rw-r--r-- | arch/arm/include/asm/xen/hypercall.h | 69 | ||||
| -rw-r--r-- | arch/arm/include/asm/xen/hypervisor.h | 19 | ||||
| -rw-r--r-- | arch/arm/include/asm/xen/interface.h | 73 | ||||
| -rw-r--r-- | arch/arm/include/asm/xen/page.h | 82 |
7 files changed, 294 insertions, 0 deletions
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/sync_bitops.h b/arch/arm/include/asm/sync_bitops.h new file mode 100644 index 0000000..63479ee --- /dev/null +++ b/arch/arm/include/asm/sync_bitops.h @@ -0,0 +1,27 @@ +#ifndef __ASM_SYNC_BITOPS_H__ +#define __ASM_SYNC_BITOPS_H__ + +#include <asm/bitops.h> +#include <asm/system.h> + +/* sync_bitops functions are equivalent to the SMP implementation of the + * original functions, independently from CONFIG_SMP being defined. + * + * We need them because _set_bit etc are not SMP safe if !CONFIG_SMP. But + * under Xen you might be communicating with a completely external entity + * who might be on another CPU (e.g. two uniprocessor guests communicating + * via event channels and grant tables). So we need a variant of the bit + * ops which are SMP safe even on a UP kernel. + */ + +#define sync_set_bit(nr, p) _set_bit(nr, p) +#define sync_clear_bit(nr, p) _clear_bit(nr, p) +#define sync_change_bit(nr, p) _change_bit(nr, p) +#define sync_test_and_set_bit(nr, p) _test_and_set_bit(nr, p) +#define sync_test_and_clear_bit(nr, p) _test_and_clear_bit(nr, p) +#define sync_test_and_change_bit(nr, p) _test_and_change_bit(nr, p) +#define sync_test_bit(nr, addr) test_bit(nr, addr) +#define sync_cmpxchg cmpxchg + + +#endif diff --git a/arch/arm/include/asm/xen/events.h b/arch/arm/include/asm/xen/events.h new file mode 100644 index 0000000..94b4e90 --- /dev/null +++ b/arch/arm/include/asm/xen/events.h @@ -0,0 +1,18 @@ +#ifndef _ASM_ARM_XEN_EVENTS_H +#define _ASM_ARM_XEN_EVENTS_H + +#include <asm/ptrace.h> + +enum ipi_vector { + XEN_PLACEHOLDER_VECTOR, + + /* Xen IPIs go here */ + XEN_NR_IPIS, +}; + +static inline int xen_irqs_disabled(struct pt_regs *regs) +{ + return raw_irqs_disabled_flags(regs->ARM_cpsr); +} + +#endif /* _ASM_ARM_XEN_EVENTS_H */ diff --git a/arch/arm/include/asm/xen/hypercall.h b/arch/arm/include/asm/xen/hypercall.h new file mode 100644 index 0000000..8a82325 --- /dev/null +++ b/arch/arm/include/asm/xen/hypercall.h @@ -0,0 +1,69 @@ +/****************************************************************************** + * hypercall.h + * + * Linux-specific hypervisor handling. + * + * Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Citrix, 2012 + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation; or, when distributed + * separately from the Linux kernel or incorporated into other + * software packages, subject to the following license: + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this source file (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, copy, modify, + * merge, publish, distribute, sublicense, and/or sell copies of the Software, + * and to permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#ifndef _ASM_ARM_XEN_HYPERCALL_H +#define _ASM_ARM_XEN_HYPERCALL_H + +#include <xen/interface/xen.h> + +long privcmd_call(unsigned call, unsigned long a1, + unsigned long a2, unsigned long a3, + unsigned long a4, unsigned long a5); +int HYPERVISOR_xen_version(int cmd, void *arg); +int HYPERVISOR_console_io(int cmd, int count, char *str); +int HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count); +int HYPERVISOR_sched_op(int cmd, void *arg); +int HYPERVISOR_event_channel_op(int cmd, void *arg); +unsigned long HYPERVISOR_hvm_op(int op, void *arg); +int HYPERVISOR_memory_op(unsigned int cmd, void *arg); +int HYPERVISOR_physdev_op(int cmd, void *arg); + +static inline void +MULTI_update_va_mapping(struct multicall_entry *mcl, unsigned long va, + unsigned int new_val, unsigned long flags) +{ + BUG(); +} + +static inline void +MULTI_mmu_update(struct multicall_entry *mcl, struct mmu_update *req, + int count, int *success_count, domid_t domid) +{ + BUG(); +} + +static inline int +HYPERVISOR_multicall(void *call_list, int nr_calls) +{ + BUG(); +} +#endif /* _ASM_ARM_XEN_HYPERCALL_H */ 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..ae05e56 --- /dev/null +++ b/arch/arm/include/asm/xen/interface.h @@ -0,0 +1,73 @@ +/****************************************************************************** + * 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 uint64_aligned_t uint64_t __attribute__((aligned(8))) + +#define __DEFINE_GUEST_HANDLE(name, type) \ + typedef struct { union { type *p; uint64_aligned_t q; }; } \ + __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).p = val; \ + } while (0) + +#ifndef __ASSEMBLY__ +/* Explicitly size integers that represent pfns in the interface with + * Xen so that we can have one ABI that works for 32 and 64 bit guests. */ +typedef uint64_t xen_pfn_t; +typedef uint64_t xen_ulong_t; +/* 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); +DEFINE_GUEST_HANDLE(xen_pfn_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/include/asm/xen/page.h b/arch/arm/include/asm/xen/page.h new file mode 100644 index 0000000..1742023 --- /dev/null +++ b/arch/arm/include/asm/xen/page.h @@ -0,0 +1,82 @@ +#ifndef _ASM_ARM_XEN_PAGE_H +#define _ASM_ARM_XEN_PAGE_H + +#include <asm/page.h> +#include <asm/pgtable.h> + +#include <linux/pfn.h> +#include <linux/types.h> + +#include <xen/interface/grant_table.h> + +#define pfn_to_mfn(pfn) (pfn) +#define phys_to_machine_mapping_valid (1) +#define mfn_to_pfn(mfn) (mfn) +#define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT)) + +#define pte_mfn pte_pfn +#define mfn_pte pfn_pte + +/* Xen machine address */ +typedef struct xmaddr { + phys_addr_t maddr; +} xmaddr_t; + +/* Xen pseudo-physical address */ +typedef struct xpaddr { + phys_addr_t paddr; +} xpaddr_t; + +#define XMADDR(x) ((xmaddr_t) { .maddr = (x) }) +#define XPADDR(x) ((xpaddr_t) { .paddr = (x) }) + +static inline xmaddr_t phys_to_machine(xpaddr_t phys) +{ + unsigned offset = phys.paddr & ~PAGE_MASK; + return XMADDR(PFN_PHYS(pfn_to_mfn(PFN_DOWN(phys.paddr))) | offset); +} + +static inline xpaddr_t machine_to_phys(xmaddr_t machine) +{ + unsigned offset = machine.maddr & ~PAGE_MASK; + return XPADDR(PFN_PHYS(mfn_to_pfn(PFN_DOWN(machine.maddr))) | offset); +} +/* VIRT <-> MACHINE conversion */ +#define virt_to_machine(v) (phys_to_machine(XPADDR(__pa(v)))) +#define virt_to_pfn(v) (PFN_DOWN(__pa(v))) +#define virt_to_mfn(v) (pfn_to_mfn(virt_to_pfn(v))) +#define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT)) + +static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr) +{ + /* TODO: assuming it is mapped in the kernel 1:1 */ + return virt_to_machine(vaddr); +} + +/* TODO: this shouldn't be here but it is because the frontend drivers + * are using it (its rolled in headers) even though we won't hit the code path. + * So for right now just punt with this. + */ +static inline pte_t *lookup_address(unsigned long address, unsigned int *level) +{ + BUG(); + return NULL; +} + +static inline int m2p_add_override(unsigned long mfn, struct page *page, + struct gnttab_map_grant_ref *kmap_op) +{ + return 0; +} + +static inline int m2p_remove_override(struct page *page, bool clear_pte) +{ + return 0; +} + +static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn) +{ + BUG(); + return false; +} +#endif /* _ASM_ARM_XEN_PAGE_H */ |