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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH 12/14] kernel-doc: public/xen.h
From: Stefano Stabellini <stefano.stabellini@xxxxxxxxxx>
Convert in-code comments to kernel-doc format wherever possible.
Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxx>
---
xen/include/public/xen.h | 567 ++++++++++++++++++++++++++-------------
1 file changed, 378 insertions(+), 189 deletions(-)
diff --git a/xen/include/public/xen.h b/xen/include/public/xen.h
index 945ef30273..ff1a62209d 100644
--- a/xen/include/public/xen.h
+++ b/xen/include/public/xen.h
@@ -81,14 +81,63 @@ DEFINE_XEN_GUEST_HANDLE(xen_ulong_t);
#endif
-/*
- * HYPERCALLS
- */
-
-/* `incontents 100 hcalls List of hypercalls
- * ` enum hypercall_num { // __HYPERVISOR_* => HYPERVISOR_*()
+/**
+ * DOC: HYPERCALLS
+ *
+ * List of hypercalls
+ *
+ * - __HYPERVISOR_set_trap_table
+ * - __HYPERVISOR_mmu_update
+ * - __HYPERVISOR_set_gdt
+ * - __HYPERVISOR_stack_switch
+ * - __HYPERVISOR_set_callbacks
+ * - __HYPERVISOR_fpu_taskswitch
+ * - __HYPERVISOR_sched_op_compat
+ * - __HYPERVISOR_platform_op
+ * - __HYPERVISOR_set_debugreg
+ * - __HYPERVISOR_get_debugreg
+ * - __HYPERVISOR_update_descriptor
+ * - __HYPERVISOR_memory_op
+ * - __HYPERVISOR_multicall
+ * - __HYPERVISOR_update_va_mapping
+ * - __HYPERVISOR_set_timer_op
+ * - __HYPERVISOR_event_channel_op_compat
+ * - __HYPERVISOR_xen_version
+ * - __HYPERVISOR_console_io
+ * - __HYPERVISOR_physdev_op_compat
+ * - __HYPERVISOR_grant_table_op
+ * - __HYPERVISOR_vm_assist
+ * - __HYPERVISOR_update_va_mapping_otherdomain
+ * - __HYPERVISOR_iret
+ * - __HYPERVISOR_vcpu_op
+ * - __HYPERVISOR_set_segment_base
+ * - __HYPERVISOR_mmuext_op
+ * - __HYPERVISOR_xsm_op
+ * - __HYPERVISOR_nmi_op
+ * - __HYPERVISOR_sched_op
+ * - __HYPERVISOR_callback_op
+ * - __HYPERVISOR_xenoprof_op
+ * - __HYPERVISOR_event_channel_op
+ * - __HYPERVISOR_physdev_op
+ * - __HYPERVISOR_hvm_op
+ * - __HYPERVISOR_sysctl
+ * - __HYPERVISOR_domctl
+ * - __HYPERVISOR_kexec_op
+ * - __HYPERVISOR_tmem_op
+ * - __HYPERVISOR_argo_op
+ * - __HYPERVISOR_xenpmu_op
+ * - __HYPERVISOR_dm_op
+ * - __HYPERVISOR_hypfs_op
+ * - __HYPERVISOR_arch_0
+ * - __HYPERVISOR_arch_1
+ * - __HYPERVISOR_arch_2
+ * - __HYPERVISOR_arch_3
+ * - __HYPERVISOR_arch_4
+ * - __HYPERVISOR_arch_5
+ * - __HYPERVISOR_arch_6
+ * - __HYPERVISOR_arch_7
*/
-
+ /* ` enum hypercall_num { // __HYPERVISOR_* => HYPERVISOR_*() */
#define __HYPERVISOR_set_trap_table 0
#define __HYPERVISOR_mmu_update 1
#define __HYPERVISOR_set_gdt 2
@@ -167,8 +216,8 @@ DEFINE_XEN_GUEST_HANDLE(xen_ulong_t);
#define __HYPERVISOR_dom0_op __HYPERVISOR_platform_op
#endif
-/*
- * VIRTUAL INTERRUPTS
+/**
+ * DOC: VIRTUAL INTERRUPTS
*
* Virtual interrupts that a guest OS may receive from Xen.
*
@@ -176,21 +225,43 @@ DEFINE_XEN_GUEST_HANDLE(xen_ulong_t);
* global VIRQ. The former can be bound once per VCPU and cannot be re-bound.
* The latter can be allocated only once per guest: they must initially be
* allocated to VCPU0 but can subsequently be re-bound.
+ *
+ * - VIRQ_TIMER: V. Timebase update, and/or requested timeout.
+ * - VIRQ_DEBUG: V. Request guest to dump debug info.
+ * - VIRQ_CONSOLE: G. (DOM0) Bytes received on emergency console.
+ * - VIRQ_DOM_EXC: G. (DOM0) Exceptional event for some domain.
+ * - VIRQ_TBUF: G. (DOM0) Trace buffer has records available.
+ * - VIRQ_DEBUGGER: G. (DOM0) A domain has paused for debugging.
+ * - VIRQ_XENOPROF: V. XenOprofile interrupt: new sample available
+ * - VIRQ_CON_RING: G. (DOM0) Bytes received on console
+ * - VIRQ_PCPU_STATE: G. (DOM0) PCPU state changed
+ * - VIRQ_MEM_EVENT: G. (DOM0) A memory event has occurred
+ * - VIRQ_ARGO: G. Argo interdomain message notification
+ * - VIRQ_ENOMEM: G. (DOM0) Low on heap memory
+ * - VIRQ_XENPMU: V. PMC interrupt
+ * - VIRQ_ARCH_0
+ * - VIRQ_ARCH_1
+ * - VIRQ_ARCH_2
+ * - VIRQ_ARCH_3
+ * - VIRQ_ARCH_4
+ * - VIRQ_ARCH_5
+ * - VIRQ_ARCH_6
+ * - VIRQ_ARCH_7
*/
/* ` enum virq { */
-#define VIRQ_TIMER 0 /* V. Timebase update, and/or requested timeout. */
-#define VIRQ_DEBUG 1 /* V. Request guest to dump debug info. */
-#define VIRQ_CONSOLE 2 /* G. (DOM0) Bytes received on emergency console. */
-#define VIRQ_DOM_EXC 3 /* G. (DOM0) Exceptional event for some domain. */
-#define VIRQ_TBUF 4 /* G. (DOM0) Trace buffer has records available. */
-#define VIRQ_DEBUGGER 6 /* G. (DOM0) A domain has paused for debugging. */
-#define VIRQ_XENOPROF 7 /* V. XenOprofile interrupt: new sample available */
-#define VIRQ_CON_RING 8 /* G. (DOM0) Bytes received on console */
-#define VIRQ_PCPU_STATE 9 /* G. (DOM0) PCPU state changed */
-#define VIRQ_MEM_EVENT 10 /* G. (DOM0) A memory event has occurred */
-#define VIRQ_ARGO 11 /* G. Argo interdomain message notification */
-#define VIRQ_ENOMEM 12 /* G. (DOM0) Low on heap memory */
-#define VIRQ_XENPMU 13 /* V. PMC interrupt */
+#define VIRQ_TIMER 0
+#define VIRQ_DEBUG 1
+#define VIRQ_CONSOLE 2
+#define VIRQ_DOM_EXC 3
+#define VIRQ_TBUF 4
+#define VIRQ_DEBUGGER 6
+#define VIRQ_XENOPROF 7
+#define VIRQ_CON_RING 8
+#define VIRQ_PCPU_STATE 9
+#define VIRQ_MEM_EVENT 10
+#define VIRQ_ARGO 11
+#define VIRQ_ENOMEM 12
+#define VIRQ_XENPMU 13
/* Architecture-specific VIRQ definitions. */
#define VIRQ_ARCH_0 16
@@ -205,12 +276,14 @@ DEFINE_XEN_GUEST_HANDLE(xen_ulong_t);
#define NR_VIRQS 24
-/*
- * ` enum neg_errnoval
- * ` HYPERVISOR_mmu_update(const struct mmu_update reqs[],
- * ` unsigned count, unsigned *done_out,
- * ` unsigned foreigndom)
- * `
+/**
+ * DOC: HYPERVISOR_mmu_update
+ *
+ * enum neg_errnoval
+ * HYPERVISOR_mmu_update(const struct mmu_update reqs[],
+ * unsigned count, unsigned *done_out,
+ * unsigned foreigndom)
+ *
* @reqs is an array of mmu_update_t structures ((ptr, val) pairs).
* @count is the length of the above array.
* @pdone is an output parameter indicating number of completed operations
@@ -222,8 +295,9 @@ DEFINE_XEN_GUEST_HANDLE(xen_ulong_t);
* x == 0 => PFD == DOMID_SELF
* x != 0 => PFD == x - 1
*
+ *
* Sub-commands: ptr[1:0] specifies the appropriate MMU_* command.
- * -------------
+ *
* ptr[1:0] == MMU_NORMAL_PT_UPDATE:
* Updates an entry in a page table belonging to PFD. If updating an L1 table,
* and the new table entry is valid/present, the mapped frame must belong to
@@ -354,16 +428,16 @@ DEFINE_XEN_GUEST_HANDLE(xen_ulong_t);
#define MMU_PT_UPDATE_NO_TRANSLATE 3 /* checked '*ptr = val'. ptr is MA.
*/
/* val never translated.
*/
-/*
- * MMU EXTENDED OPERATIONS
+/**
+ * DOC: MMU EXTENDED OPERATIONS
*
- * ` enum neg_errnoval
- * ` HYPERVISOR_mmuext_op(mmuext_op_t uops[],
- * ` unsigned int count,
- * ` unsigned int *pdone,
- * ` unsigned int foreigndom)
- */
-/* HYPERVISOR_mmuext_op() accepts a list of mmuext_op structures.
+ * enum neg_errnoval
+ * HYPERVISOR_mmuext_op(mmuext_op_t uops[],
+ * unsigned int count,
+ * unsigned int *pdone,
+ * unsigned int foreigndom)
+ *
+ * HYPERVISOR_mmuext_op() accepts a list of mmuext_op structures.
* A foreigndom (FD) can be specified (or DOMID_SELF for none).
* Where the FD has some effect, it is described below.
*
@@ -468,19 +542,21 @@ typedef struct mmuext_op mmuext_op_t;
DEFINE_XEN_GUEST_HANDLE(mmuext_op_t);
#endif
-/*
- * ` enum neg_errnoval
- * ` HYPERVISOR_update_va_mapping(unsigned long va, u64 val,
- * ` enum uvm_flags flags)
- * `
- * ` enum neg_errnoval
- * ` HYPERVISOR_update_va_mapping_otherdomain(unsigned long va, u64 val,
- * ` enum uvm_flags flags,
- * ` domid_t domid)
- * `
- * ` @va: The virtual address whose mapping we want to change
- * ` @val: The new page table entry, must contain a machine address
- * ` @flags: Control TLB flushes
+/**
+ * DOC: HYPERVISOR_update_va_mapping
+ *
+ * enum neg_errnoval
+ * HYPERVISOR_update_va_mapping(unsigned long va, u64 val,
+ * enum uvm_flags flags)
+ *
+ * enum neg_errnoval
+ * HYPERVISOR_update_va_mapping_otherdomain(unsigned long va, u64 val,
+ * enum uvm_flags flags,
+ * domid_t domid)
+ *
+ * @va: The virtual address whose mapping we want to change
+ * @val: The new page table entry, must contain a machine address
+ * @flags: Control TLB flushes
*/
/* These are passed as 'flags' to update_va_mapping. They can be ORed. */
/* When specifying UVMF_MULTI, also OR in a pointer to a CPU bitmap. */
@@ -495,11 +571,13 @@ DEFINE_XEN_GUEST_HANDLE(mmuext_op_t);
#define UVMF_ALL (xen_mk_ulong(1)<<2) /* Flush all TLBs. */
/* ` } */
-/*
- * ` int
- * ` HYPERVISOR_console_io(unsigned int cmd,
- * ` unsigned int count,
- * ` char buffer[]);
+/**
+ * DOC: HYPERVISOR_console_io
+ *
+ * int
+ * HYPERVISOR_console_io(unsigned int cmd,
+ * unsigned int count,
+ * char buffer[]);
*
* @cmd: Command (see below)
* @count: Size of the buffer to read/write
@@ -522,29 +600,43 @@ DEFINE_XEN_GUEST_HANDLE(mmuext_op_t);
#define CONSOLEIO_write 0
#define CONSOLEIO_read 1
-/*
+/**
+ * DOC: VMASST_CMD_enable and VMASST_CMD_disable
* Commands to HYPERVISOR_vm_assist().
*/
#define VMASST_CMD_enable 0
#define VMASST_CMD_disable 1
-/* x86/32 guests: simulate full 4GB segment limits. */
+/**
+ * DOC: VMASST_TYPE_4gb_segments
+ * x86/32 guests: simulate full 4GB segment limits.
+ */
#define VMASST_TYPE_4gb_segments 0
-/* x86/32 guests: trap (vector 15) whenever above vmassist is used. */
+/**
+ * DOC: VMASST_TYPE_4gb_segments_notify
+ * x86/32 guests: trap (vector 15) whenever above vmassist is used.
+ */
#define VMASST_TYPE_4gb_segments_notify 1
-/*
+/**
+ * DOC: VMASST_TYPE_writable_pagetables
+ *
* x86 guests: support writes to bottom-level PTEs.
* NB1. Page-directory entries cannot be written.
* NB2. Guest must continue to remove all writable mappings of PTEs.
*/
#define VMASST_TYPE_writable_pagetables 2
-/* x86/PAE guests: support PDPTs above 4GB. */
+/**
+ * DOC: VMASST_TYPE_pae_extended_cr3
+ * x86/PAE guests: support PDPTs above 4GB.
+ */
#define VMASST_TYPE_pae_extended_cr3 3
-/*
+/**
+ * DOC: VMASST_TYPE_architectural_iopl
+ *
* x86 guests: Sane behaviour for virtual iopl
* - virtual iopl updated from do_iret() hypercalls.
* - virtual iopl reported in bounce frames.
@@ -552,14 +644,18 @@ DEFINE_XEN_GUEST_HANDLE(mmuext_op_t);
*/
#define VMASST_TYPE_architectural_iopl 4
-/*
+/**
+ * DOC: VMASST_TYPE_runstate_update_flag
+ *
* All guests: activate update indicator in vcpu_runstate_info
* Enable setting the XEN_RUNSTATE_UPDATE flag in guest memory mapped
* vcpu_runstate_info during updates of the runstate information.
*/
#define VMASST_TYPE_runstate_update_flag 5
-/*
+/**
+ * DOC: VMASST_TYPE_m2p_strict
+ *
* x86/64 guests: strictly hide M2P from user mode.
* This allows the guest to control respective hypervisor behavior:
* - when not set, L4 tables get created with the respective slot blank,
@@ -578,10 +674,15 @@ DEFINE_XEN_GUEST_HANDLE(mmuext_op_t);
/* Domain ids >= DOMID_FIRST_RESERVED cannot be used for ordinary domains. */
#define DOMID_FIRST_RESERVED xen_mk_uint(0x7FF0)
-/* DOMID_SELF is used in certain contexts to refer to oneself. */
+/**
+ * DOC: DOMID_SELF
+ * DOMID_SELF is used in certain contexts to refer to oneself.
+ */
#define DOMID_SELF xen_mk_uint(0x7FF0)
-/*
+/**
+ * DOC: DOMID_IO
+ *
* DOMID_IO is used to restrict page-table updates to mapping I/O memory.
* Although no Foreign Domain need be specified to map I/O pages, DOMID_IO
* is useful to ensure that no mappings to the OS's own heap are accidentally
@@ -594,7 +695,9 @@ DEFINE_XEN_GUEST_HANDLE(mmuext_op_t);
*/
#define DOMID_IO xen_mk_uint(0x7FF1)
-/*
+/**
+ * DOC: DOMID_XEN
+ *
* DOMID_XEN is used to allow privileged domains to map restricted parts of
* Xen's heap space (e.g., the machine_to_phys table).
* This only makes sense as
@@ -605,38 +708,55 @@ DEFINE_XEN_GUEST_HANDLE(mmuext_op_t);
*/
#define DOMID_XEN xen_mk_uint(0x7FF2)
-/*
- * DOMID_COW is used as the owner of sharable pages */
+/**
+ * DOC: DOMID_COW
+ * DOMID_COW is used as the owner of sharable pages
+ */
#define DOMID_COW xen_mk_uint(0x7FF3)
-/* DOMID_INVALID is used to identify pages with unknown owner. */
+/**
+ * DOC: DOMID_INVALID
+ * DOMID_INVALID is used to identify pages with unknown owner.
+ */
#define DOMID_INVALID xen_mk_uint(0x7FF4)
-/* Idle domain. */
+/**
+ * DOC: DOMID_IDLE
+ * Idle domain.
+ */
#define DOMID_IDLE xen_mk_uint(0x7FFF)
-/* Mask for valid domain id values */
+/**
+ * DOC: DOMID_MASK
+ * Mask for valid domain id values
+ */
#define DOMID_MASK xen_mk_uint(0x7FFF)
#ifndef __ASSEMBLY__
typedef uint16_t domid_t;
-/*
+/**
+ * struct mmu_update - HYPERVISOR_mmu_update
+ *
* Send an array of these to HYPERVISOR_mmu_update().
* NB. The fields are natural pointer/address size for this architecture.
*/
struct mmu_update {
- uint64_t ptr; /* Machine address of PTE. */
- uint64_t val; /* New contents of PTE. */
+ /** @ptr: Machine address of PTE. */
+ uint64_t ptr;
+ /** @val: New contents of PTE. */
+ uint64_t val;
};
typedef struct mmu_update mmu_update_t;
DEFINE_XEN_GUEST_HANDLE(mmu_update_t);
-/*
- * ` enum neg_errnoval
- * ` HYPERVISOR_multicall(multicall_entry_t call_list[],
- * ` uint32_t nr_calls);
+/**
+ * struct multicall_entry - HYPERVISOR_multicall
+ *
+ * enum neg_errnoval
+ * HYPERVISOR_multicall(multicall_entry_t call_list[],
+ * uint32_t nr_calls);
*
* NB. The fields are logically the natural register size for this
* architecture. In cases where xen_ulong_t is larger than this then
@@ -650,34 +770,40 @@ typedef struct multicall_entry multicall_entry_t;
DEFINE_XEN_GUEST_HANDLE(multicall_entry_t);
#if __XEN_INTERFACE_VERSION__ < 0x00040400
-/*
+/**
+ * DOC: NR_EVENT_CHANNELS
+ *
* Event channel endpoints per domain (when using the 2-level ABI):
* 1024 if a long is 32 bits; 4096 if a long is 64 bits.
*/
#define NR_EVENT_CHANNELS EVTCHN_2L_NR_CHANNELS
#endif
+/**
+ * struct vcpu_time_info
+ *
+ * Updates to the following values are preceded and followed by an
+ * increment of 'version'. The guest can therefore detect updates by
+ * looking for changes to 'version'. If the least-significant bit of
+ * the version number is set then an update is in progress and the guest
+ * must wait to read a consistent set of values.
+ * The correct way to interact with the version number is similar to
+ * Linux's seqlock: see the implementations of read_seqbegin/read_seqretry.
+ *
+ * Current system time:
+ * system_time +
+ * ((((tsc - tsc_timestamp) << tsc_shift) * tsc_to_system_mul) >> 32)
+ * CPU frequency (Hz):
+ * ((10^9 << 32) / tsc_to_system_mul) >> tsc_shift
+ */
struct vcpu_time_info {
- /*
- * Updates to the following values are preceded and followed by an
- * increment of 'version'. The guest can therefore detect updates by
- * looking for changes to 'version'. If the least-significant bit of
- * the version number is set then an update is in progress and the guest
- * must wait to read a consistent set of values.
- * The correct way to interact with the version number is similar to
- * Linux's seqlock: see the implementations of read_seqbegin/read_seqretry.
- */
uint32_t version;
uint32_t pad0;
- uint64_t tsc_timestamp; /* TSC at last update of time vals. */
- uint64_t system_time; /* Time, in nanosecs, since boot. */
- /*
- * Current system time:
- * system_time +
- * ((((tsc - tsc_timestamp) << tsc_shift) * tsc_to_system_mul) >> 32)
- * CPU frequency (Hz):
- * ((10^9 << 32) / tsc_to_system_mul) >> tsc_shift
- */
+ /** @tsc_timestamp: TSC at last update of time vals. */
+ uint64_t tsc_timestamp;
+ /** @system_time: Time, in nanosecs, since boot. */
+ uint64_t system_time;
+
uint32_t tsc_to_system_mul;
int8_t tsc_shift;
#if __XEN_INTERFACE_VERSION__ > 0x040600
@@ -692,18 +818,23 @@ typedef struct vcpu_time_info vcpu_time_info_t;
#define XEN_PVCLOCK_TSC_STABLE_BIT (1 << 0)
#define XEN_PVCLOCK_GUEST_STOPPED (1 << 1)
+/**
+ * struct vcpu_info
+ */
struct vcpu_info {
- /*
- * 'evtchn_upcall_pending' is written non-zero by Xen to indicate
- * a pending notification for a particular VCPU. It is then cleared
- * by the guest OS /before/ checking for pending work, thus avoiding
- * a set-and-check race. Note that the mask is only accessed by Xen
- * on the CPU that is currently hosting the VCPU. This means that the
- * pending and mask flags can be updated by the guest without special
- * synchronisation (i.e., no need for the x86 LOCK prefix).
- * This may seem suboptimal because if the pending flag is set by
- * a different CPU then an IPI may be scheduled even when the mask
- * is set. However, note:
+ /**
+ * @evtchn_upcall_pending:
+ *
+ * it is written non-zero by Xen to indicate a pending notification
+ * for a particular VCPU. It is then cleared by the guest OS
+ * /before/ checking for pending work, thus avoiding a set-and-check
+ * race. Note that the mask is only accessed by Xen on the CPU that
+ * is currently hosting the VCPU. This means that the pending and
+ * mask flags can be updated by the guest without special
+ * synchronisation (i.e., no need for the x86 LOCK prefix). This
+ * may seem suboptimal because if the pending flag is set by a
+ * different CPU then an IPI may be scheduled even when the mask is
+ * set. However, note:
* 1. The task of 'interrupt holdoff' is covered by the per-event-
* channel mask bits. A 'noisy' event that is continually being
* triggered can be masked at source at this very precise
@@ -732,61 +863,69 @@ struct vcpu_info {
typedef struct vcpu_info vcpu_info_t;
#endif
-/*
- * `incontents 200 startofday_shared Start-of-day shared data structure
+/**
+ * struct shared_info - Start-of-day shared data structure
+ *
* Xen/kernel shared data -- pointer provided in start_info.
*
* This structure is defined to be both smaller than a page, and the
* only data on the shared page, but may vary in actual size even within
* compatible Xen versions; guests should not rely on the size
* of this structure remaining constant.
+ *
+ * A domain can create "event channels" on which it can send and receive
+ * asynchronous event notifications. There are three classes of event that
+ * are delivered by this mechanism:
+ * 1. Bi-directional inter- and intra-domain connections. Domains must
+ * arrange out-of-band to set up a connection (usually by allocating
+ * an unbound 'listener' port and avertising that via a storage service
+ * such as xenstore).
+ * 2. Physical interrupts. A domain with suitable hardware-access
+ * privileges can bind an event-channel port to a physical interrupt
+ * source.
+ * 3. Virtual interrupts ('events'). A domain can bind an event-channel
+ * port to a virtual interrupt source, such as the virtual-timer
+ * device or the emergency console.
+ *
+ *
+ * @evtchn_pending: pending notifications
+ * @evtchn_mask: mask/unmask notifications
+ *
+ * Event channels are addressed by a "port index". Each channel is
+ * associated with two bits of information:
+ * 1. PENDING -- notifies the domain that there is a pending notification
+ * to be processed. This bit is cleared by the guest.
+ * 2. MASK -- if this bit is clear then a 0->1 transition of PENDING
+ * will cause an asynchronous upcall to be scheduled. This bit is only
+ * updated by the guest. It is read-only within Xen. If a channel
+ * becomes pending while the channel is masked then the 'edge' is lost
+ * (i.e., when the channel is unmasked, the guest must manually handle
+ * pending notifications as no upcall will be scheduled by Xen).
+ *
+ * To expedite scanning of pending notifications, any 0->1 pending
+ * transition on an unmasked channel causes a corresponding bit in a
+ * per-vcpu selector word to be set. Each bit in the selector covers a
+ * 'C long' in the PENDING bitfield array.
+ *
+ *
+ * @wc_version: wallclock time version
+ * @wc_sec: secs offset from Unix epoc
+ * @wc_nsec: nsecs offset from Unix epoc
+ *
+ * Wallclock time: updated by control software or RTC emulation.
+ * Guests should base their gettimeofday() syscall on this
+ * wallclock-base value.
+ * The values of wc_sec and wc_nsec are offsets from the Unix epoch
+ * adjusted by the domain's 'time offset' (in seconds) as set either
+ * by XEN_DOMCTL_settimeoffset, or adjusted via a guest write to the
+ * emulated RTC.
*/
struct shared_info {
struct vcpu_info vcpu_info[XEN_LEGACY_MAX_VCPUS];
- /*
- * A domain can create "event channels" on which it can send and receive
- * asynchronous event notifications. There are three classes of event that
- * are delivered by this mechanism:
- * 1. Bi-directional inter- and intra-domain connections. Domains must
- * arrange out-of-band to set up a connection (usually by allocating
- * an unbound 'listener' port and avertising that via a storage service
- * such as xenstore).
- * 2. Physical interrupts. A domain with suitable hardware-access
- * privileges can bind an event-channel port to a physical interrupt
- * source.
- * 3. Virtual interrupts ('events'). A domain can bind an event-channel
- * port to a virtual interrupt source, such as the virtual-timer
- * device or the emergency console.
- *
- * Event channels are addressed by a "port index". Each channel is
- * associated with two bits of information:
- * 1. PENDING -- notifies the domain that there is a pending notification
- * to be processed. This bit is cleared by the guest.
- * 2. MASK -- if this bit is clear then a 0->1 transition of PENDING
- * will cause an asynchronous upcall to be scheduled. This bit is only
- * updated by the guest. It is read-only within Xen. If a channel
- * becomes pending while the channel is masked then the 'edge' is lost
- * (i.e., when the channel is unmasked, the guest must manually handle
- * pending notifications as no upcall will be scheduled by Xen).
- *
- * To expedite scanning of pending notifications, any 0->1 pending
- * transition on an unmasked channel causes a corresponding bit in a
- * per-vcpu selector word to be set. Each bit in the selector covers a
- * 'C long' in the PENDING bitfield array.
- */
xen_ulong_t evtchn_pending[sizeof(xen_ulong_t) * 8];
xen_ulong_t evtchn_mask[sizeof(xen_ulong_t) * 8];
- /*
- * Wallclock time: updated by control software or RTC emulation.
- * Guests should base their gettimeofday() syscall on this
- * wallclock-base value.
- * The values of wc_sec and wc_nsec are offsets from the Unix epoch
- * adjusted by the domain's 'time offset' (in seconds) as set either
- * by XEN_DOMCTL_settimeoffset, or adjusted via a guest write to the
- * emulated RTC.
- */
uint32_t wc_version; /* Version counter: see vcpu_time_info_t. */
uint32_t wc_sec;
uint32_t wc_nsec;
@@ -804,8 +943,9 @@ struct shared_info {
typedef struct shared_info shared_info_t;
#endif
-/*
- * `incontents 200 startofday Start-of-day memory layout
+#ifdef XEN_HAVE_PV_GUEST_ENTRY
+/**
+ * struct start_info - Start-of-day memory layout
*
* 1. The domain is started within contiguous virtual-memory region.
* 2. The contiguous region ends on an aligned 4MB boundary.
@@ -841,38 +981,72 @@ typedef struct shared_info shared_info_t;
* 32-bit and runs under a 64-bit hypervisor should _NOT_ use two of the
* pages preceding pt_base and mark them as reserved/unused.
*/
-#ifdef XEN_HAVE_PV_GUEST_ENTRY
struct start_info {
/* THE FOLLOWING ARE FILLED IN BOTH ON INITIAL BOOT AND ON RESUME. */
- char magic[32]; /* "xen-<version>-<platform>". */
- unsigned long nr_pages; /* Total pages allocated to this domain. */
- unsigned long shared_info; /* MACHINE address of shared info struct. */
- uint32_t flags; /* SIF_xxx flags. */
- xen_pfn_t store_mfn; /* MACHINE page number of shared page. */
- uint32_t store_evtchn; /* Event channel for store communication. */
+ /** @magic: "xen-<version>-<platform>". */
+ char magic[32];
+ /** @nr_pages: Total pages allocated to this domain. */
+ unsigned long nr_pages;
+ /** @shared_info: MACHINE address of shared info struct. */
+ unsigned long shared_info;
+ /** flags: SIF_xxx flags. */
+ uint32_t flags;
+ /** @store_mfn: MACHINE page number of shared page. */
+ xen_pfn_t store_mfn;
+ /** @store_evtchn: Event channel for store communication. */
+ uint32_t store_evtchn;
union {
struct {
- xen_pfn_t mfn; /* MACHINE page number of console page. */
- uint32_t evtchn; /* Event channel for console page. */
+ /**
+ * @console.domU.mfn: MACHINE page number of console page.
+ */
+ xen_pfn_t mfn;
+ /**
+ * @console.domU.evtchn: Event channel for console page.
+ */
+ uint32_t evtchn;
} domU;
struct {
- uint32_t info_off; /* Offset of console_info struct. */
- uint32_t info_size; /* Size of console_info struct from start.*/
+ /**
+ * @console.dom0.info_off: Offset of console_info struct.
+ */
+ uint32_t info_off;
+ /**
+ * @info_size: Size of console_info struct from start.
+ */
+ uint32_t info_size;
} dom0;
} console;
/* THE FOLLOWING ARE ONLY FILLED IN ON INITIAL BOOT (NOT RESUME). */
- unsigned long pt_base; /* VIRTUAL address of page directory. */
- unsigned long nr_pt_frames; /* Number of bootstrap p.t. frames. */
- unsigned long mfn_list; /* VIRTUAL address of page-frame list. */
- unsigned long mod_start; /* VIRTUAL address of pre-loaded module */
- /* (PFN of pre-loaded module if */
- /* SIF_MOD_START_PFN set in flags). */
- unsigned long mod_len; /* Size (bytes) of pre-loaded module. */
+ /** @pt_base: VIRTUAL address of page directory. */
+ unsigned long pt_base;
+ /** @nr_pt_frames: Number of bootstrap p.t. frames. */
+ unsigned long nr_pt_frames;
+ /** @mfn_list: VIRTUAL address of page-frame list. */
+ unsigned long mfn_list;
+ /**
+ * @mod_start: VIRTUAL address of pre-loaded module.
+ * (PFN of pre-loaded module if SIF_MOD_START_PFN set in flags).
+ */
+ unsigned long mod_start;
+ /** @mod_len: Size (bytes) of pre-loaded module. */
+ unsigned long mod_len;
#define MAX_GUEST_CMDLINE 1024
int8_t cmd_line[MAX_GUEST_CMDLINE];
- /* The pfn range here covers both page table and p->m table frames. */
- unsigned long first_p2m_pfn;/* 1st pfn forming initial P->M table. */
- unsigned long nr_p2m_frames;/* # of pfns forming initial P->M table. */
+ /**
+ * @first_p2m_pfn:
+ *
+ * 1st pfn forming initial P->M table from the pfn range that covers
+ * both page table and p->m table frames.
+ */
+ unsigned long first_p2m_pfn;
+ /**
+ * @nr_p2m_frames:
+ *
+ * # of pfns forming initial P->M table from the pfn range that
+ * covers both page table and p->m table frames.
+ */
+ unsigned long nr_p2m_frames;
};
typedef struct start_info start_info_t;
@@ -883,16 +1057,29 @@ typedef struct start_info start_info_t;
#endif
#endif /* XEN_HAVE_PV_GUEST_ENTRY */
-/* These flags are passed in the 'flags' field of start_info_t. */
-#define SIF_PRIVILEGED (1<<0) /* Is the domain privileged? */
-#define SIF_INITDOMAIN (1<<1) /* Is this the initial control domain? */
-#define SIF_MULTIBOOT_MOD (1<<2) /* Is mod_start a multiboot module? */
-#define SIF_MOD_START_PFN (1<<3) /* Is mod_start a PFN? */
-#define SIF_VIRT_P2M_4TOOLS (1<<4) /* Do Xen tools understand a virt. mapped */
- /* P->M making the 3 level tree obsolete? */
-#define SIF_PM_MASK (0xFF<<8) /* reserve 1 byte for xen-pm options */
-
-/*
+/**
+ * DOC: SIF_*
+ *
+ * These flags are passed in the 'flags' field of start_info_t.
+ *
+ * - SIF_PRIVILEGED: Is the domain privileged?
+ * - SIF_INITDOMAIN: Is this the initial control domain?
+ * - SIF_MULTIBOOT_MOD: Is mod_start a multiboot module?
+ * - SIF_MOD_START_PFN: Is mod_start a PFN?
+ * - SIF_VIRT_P2M_4TOOLS: Do Xen tools understand a virt. mapped
+ * P->M making the 3 level tree obsolete?
+ * - SIF_PM_MASK: reserve 1 byte for xen-pm options
+ */
+#define SIF_PRIVILEGED (1<<0)
+#define SIF_INITDOMAIN (1<<1)
+#define SIF_MULTIBOOT_MOD (1<<2)
+#define SIF_MOD_START_PFN (1<<3)
+#define SIF_VIRT_P2M_4TOOLS (1<<4)
+#define SIF_PM_MASK (0xFF<<8)
+
+/**
+ * struct xen_multiboot_mod_list
+ *
* A multiboot module is a package containing modules very similar to a
* multiboot module array. The only differences are:
* - the array of module descriptors is by convention simply at the beginning
@@ -908,13 +1095,13 @@ typedef struct start_info start_info_t;
*/
struct xen_multiboot_mod_list
{
- /* Address of first byte of the module */
+ /** @mod_start: Address of first byte of the module */
uint32_t mod_start;
- /* Address of last byte of the module (inclusive) */
+ /** @mod_end: Address of last byte of the module (inclusive) */
uint32_t mod_end;
- /* Address of zero-terminated command line */
+ /** @cmdline: Address of zero-terminated command line */
uint32_t cmdline;
- /* Unused, must be zero */
+ /** @pad: Unused, must be zero */
uint32_t pad;
};
/*
@@ -984,7 +1171,9 @@ typedef struct {
uint8_t a[16];
} xen_uuid_t;
-/*
+/**
+ * DOC: XEN_DEFINE_UUID
+ *
* XEN_DEFINE_UUID(0x00112233, 0x4455, 0x6677, 0x8899,
* 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff)
* will construct UUID 00112233-4455-6677-8899-aabbccddeeff presented as
--
2.17.1
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