Lines Matching +full:per +full:- +full:console
1 /* SPDX-License-Identifier: MIT */
13 #include "xen-compat.h"
16 #include "arch-x86/xen.h"
18 #include "arch-arm.h"
118 /* Architecture-specific hypercall definitions. */
140 /* New event-channel and physdev hypercalls introduced in 0x00030202. */
158 * In the side comments, 'V.' denotes a per-VCPU VIRQ while 'G.' denotes a
159 * global VIRQ. The former can be bound once per VCPU and cannot be re-bound.
160 * The latter can be allocated only once per guest: they must initially be
161 * allocated to VCPU0 but can subsequently be re-bound.
166 #define VIRQ_CONSOLE 2 /* G. (DOM0) Bytes received on emergency console. */
171 #define VIRQ_CON_RING 8 /* G. (DOM0) Bytes received on console */
178 /* Architecture-specific VIRQ definitions. */
206 * x != 0 => PFD == x - 1
208 * Sub-commands: ptr[1:0] specifies the appropriate MMU_* command.
209 * -------------
217 * ptr[:2] -- Machine address of the page-table entry to modify.
218 * val -- Value to write.
221 * pages that make up a pagetable must be mapped read-only in the guest.
227 * 1). Start with top-level page (PGD or in Xen language: L4). Fill out
244 * For 32-bit guests, the L4 is not used (as there is less pagetables), so
255 * Updates an entry in the machine->pseudo-physical mapping table.
256 * ptr[:2] -- Machine address within the frame whose mapping to modify.
258 * val -- Value to write into the mapping entry.
272 * - 63 if set means No execute (NX)
273 * - 46-13 the machine frame number
274 * - 12 available for guest
275 * - 11 available for guest
276 * - 10 available for guest
277 * - 9 available for guest
278 * - 8 global
279 * - 7 PAT (PSE is disabled, must use hypercall to make 4MB or 2MB pages)
280 * - 6 dirty
281 * - 5 accessed
282 * - 4 page cached disabled
283 * - 3 page write through
284 * - 2 userspace accessible
285 * - 1 writeable
286 * - 0 present
294 * using it as the Page Attribute Table (PAT) bit - for details on it please
298 * The PAT MSR is as follows (it is a 64-bit value, each entry is 8 bits):
300 * +-----+-----+----+----+----+-----+----+----+
301 * | UC | UC- | WC | WB | UC | UC- | WC | WB | <= Linux
302 * +-----+-----+----+----+----+-----+----+----+
303 * | UC | UC- | WT | WB | UC | UC- | WT | WB | <= BIOS (default when machine boots)
304 * +-----+-----+----+----+----+-----+----+----+
305 * | rsv | rsv | WP | WC | UC | UC- | WT | WB | <= Xen
306 * +-----+-----+----+----+----+-----+----+----+
328 * PWT (so bit 3 on) --> PAT (so bit 7 is on) and clear bit 3
332 * PAT (bit 7 on) --> PWT (bit 3 on) and clear bit 7.
358 * mfn: Machine frame number of new page-table base to install in MMU.
361 * mfn: Machine frame number of new page-table base to install in MMU
391 * linear_addr: Linear address of LDT base (NB. must be page-aligned).
493 * * CONSOLEIO_write: Write the buffer to Xen console.
495 * be written. Characters will be printed directly to the console.
501 * console. The maximum buffer size (i.e. @count) supported is 2GB.
521 * x86 guests: support writes to bottom-level PTEs.
522 * NB1. Page-directory entries cannot be written.
532 * - virtual iopl updated from do_iret() hypercalls.
533 * - virtual iopl reported in bounce frames.
534 * - guest kernels assumed to be level 0 for the purpose of iopl checks.
548 * - when not set, L4 tables get created with the respective slot blank,
551 * - when set, L4 tables get created with the respective slot initialized
568 * DOMID_IO is used to restrict page-table updates to mapping I/O memory.
572 * aren't adjusted on the I/O-mapping code path).
584 * - HYPERVISOR_mmu_update()'s, HYPERVISOR_mmuext_op()'s, or
586 * - with XENMAPSPACE_gmfn_foreign,
637 * Event channel endpoints per domain (when using the 2-level ABI):
647 * looking for changes to 'version'. If the least-significant bit of
660 * ((((tsc - tsc_timestamp) << tsc_shift) * tsc_to_system_mul) >> 32)
680 * 'evtchn_upcall_pending' is written non-zero by Xen to indicate
683 * a set-and-check race. Note that the mask is only accessed by Xen
690 * 1. The task of 'interrupt holdoff' is covered by the per-event-
694 * 2. The main purpose of the per-VCPU mask is therefore to restrict
700 * non-zero mask therefore guarantees that the VCPU will not receive
702 * to block: this avoids wakeup-waiting races.
719 * `incontents 200 startofday_shared Start-of-day shared data structure
720 * Xen/kernel shared data -- pointer provided in start_info.
734 * 1. Bi-directional inter- and intra-domain connections. Domains must
735 * arrange out-of-band to set up a connection (usually by allocating
738 * 2. Physical interrupts. A domain with suitable hardware-access
739 * privileges can bind an event-channel port to a physical interrupt
741 * 3. Virtual interrupts ('events'). A domain can bind an event-channel
742 * port to a virtual interrupt source, such as the virtual-timer
743 * device or the emergency console.
747 * 1. PENDING -- notifies the domain that there is a pending notification
749 * 2. MASK -- if this bit is clear then a 0->1 transition of PENDING
751 * updated by the guest. It is read-only within Xen. If a channel
756 * To expedite scanning of pending notifications, any 0->1 pending
758 * per-vcpu selector word to be set. Each bit in the selector covers a
767 * wallclock-base value.
791 * `incontents 200 startofday Start-of-day memory layout
793 * 1. The domain is started within contiguous virtual-memory region.
802 * in case of dom0 this page contains the console info, too
804 * f. unless dom0: console ring page
807 * 4. Bootstrap elements are packed together, but each is 4kB-aligned.
808 * 5. The list of page frames forms a contiguous 'pseudo-physical' memory
809 * layout for the domain. In particular, the bootstrap virtual-memory
810 * region is a 1:1 mapping to the first section of the pseudo-physical map.
811 * 6. All bootstrap elements are mapped read-writable for the guest OS. The
812 * only exception is the bootstrap page table, which is mapped read-only.
817 * Note: Prior to 25833:bb85bbccb1c9. ("x86/32-on-64 adjust Dom0 initial page
820 * This only manifested itself on 32-on-64 dom0 kernels and not 32-on-64 domU
821 * or 64-bit kernels of any colour. The page tables for a 32-on-64 dom0 got
824 * 32-bit and runs under a 64-bit hypervisor should _NOT_ use two of the
830 char magic[32]; /* "xen-<version>-<platform>". */
838 xen_pfn_t mfn; /* MACHINE page number of console page. */
839 uint32_t evtchn; /* Event channel for console page. */
845 } console; member
849 unsigned long mfn_list; /* VIRTUAL address of page-frame list. */
850 unsigned long mod_start; /* VIRTUAL address of pre-loaded module */
851 /* (PFN of pre-loaded module if */
853 unsigned long mod_len; /* Size (bytes) of pre-loaded module. */
856 /* The pfn range here covers both page table and p->m table frames. */
857 unsigned long first_p2m_pfn;/* 1st pfn forming initial P->M table. */
858 unsigned long nr_p2m_frames;/* # of pfns forming initial P->M table. */
862 /* New console union for dom0 introduced in 0x00030203. */
864 #define console_mfn console.domU.mfn
865 #define console_evtchn console.domU.evtchn
875 /* P->M making the 3 level tree obsolete? */
876 #define SIF_PM_MASK (0xFF<<8) /* reserve 1 byte for xen-pm options */
881 * - the array of module descriptors is by convention simply at the beginning
883 * - addresses in the module descriptors are based on the beginning of the
885 * - the number of modules is determined by a termination descriptor that has
898 /* Address of zero-terminated command line */
906 * The console structure in start_info.console.dom0
909 * have a working VGA/VESA console.
930 /* Bytes per scan line. */
932 /* Bits per pixel. */
973 * will construct UUID 00112233-4455-6677-8899-aabbccddeeff presented as
978 * compatible with Microsoft, as they use mixed-endian encoding (some
979 * components are little-endian, some are big-endian).
1027 * c-file-style: "BSD"
1028 * c-basic-offset: 4
1029 * tab-width: 4
1030 * indent-tabs-mode: nil