params.h revision 214077
1/* 2 * Permission is hereby granted, free of charge, to any person obtaining a copy 3 * of this software and associated documentation files (the "Software"), to 4 * deal in the Software without restriction, including without limitation the 5 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 6 * sell copies of the Software, and to permit persons to whom the Software is 7 * furnished to do so, subject to the following conditions: 8 * 9 * The above copyright notice and this permission notice shall be included in 10 * all copies or substantial portions of the Software. 11 * 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 14 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 15 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 16 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 17 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 18 * DEALINGS IN THE SOFTWARE. 19 */ 20 21#ifndef __XEN_PUBLIC_HVM_PARAMS_H__ 22#define __XEN_PUBLIC_HVM_PARAMS_H__ 23 24#include <xen/interface/hvm/hvm_op.h> 25 26/* 27 * Parameter space for HVMOP_{set,get}_param. 28 */ 29 30/* 31 * How should CPU0 event-channel notifications be delivered? 32 * val[63:56] == 0: val[55:0] is a delivery GSI (Global System Interrupt). 33 * val[63:56] == 1: val[55:0] is a delivery PCI INTx line, as follows: 34 * Domain = val[47:32], Bus = val[31:16], 35 * DevFn = val[15: 8], IntX = val[ 1: 0] 36 * If val == 0 then CPU0 event-channel notifications are not delivered. 37 */ 38#define HVM_PARAM_CALLBACK_IRQ 0 39 40/* 41 * These are not used by Xen. They are here for convenience of HVM-guest 42 * xenbus implementations. 43 */ 44#define HVM_PARAM_STORE_PFN 1 45#define HVM_PARAM_STORE_EVTCHN 2 46 47#define HVM_PARAM_PAE_ENABLED 4 48 49#define HVM_PARAM_IOREQ_PFN 5 50 51#define HVM_PARAM_BUFIOREQ_PFN 6 52 53#ifdef __ia64__ 54#define HVM_PARAM_NVRAM_FD 7 55#define HVM_PARAM_VHPT_SIZE 8 56#define HVM_PARAM_BUFPIOREQ_PFN 9 57#endif 58 59/* 60 * Set mode for virtual timers (currently x86 only): 61 * delay_for_missed_ticks (default): 62 * Do not advance a vcpu's time beyond the correct delivery time for 63 * interrupts that have been missed due to preemption. Deliver missed 64 * interrupts when the vcpu is rescheduled and advance the vcpu's virtual 65 * time stepwise for each one. 66 * no_delay_for_missed_ticks: 67 * As above, missed interrupts are delivered, but guest time always tracks 68 * wallclock (i.e., real) time while doing so. 69 * no_missed_ticks_pending: 70 * No missed interrupts are held pending. Instead, to ensure ticks are 71 * delivered at some non-zero rate, if we detect missed ticks then the 72 * internal tick alarm is not disabled if the VCPU is preempted during the 73 * next tick period. 74 * one_missed_tick_pending: 75 * Missed interrupts are collapsed together and delivered as one 'late tick'. 76 * Guest time always tracks wallclock (i.e., real) time. 77 */ 78#define HVM_PARAM_TIMER_MODE 10 79#define HVMPTM_delay_for_missed_ticks 0 80#define HVMPTM_no_delay_for_missed_ticks 1 81#define HVMPTM_no_missed_ticks_pending 2 82#define HVMPTM_one_missed_tick_pending 3 83 84/* Boolean: Enable virtual HPET (high-precision event timer)? (x86-only) */ 85#define HVM_PARAM_HPET_ENABLED 11 86 87/* Identity-map page directory used by Intel EPT when CR0.PG=0. */ 88#define HVM_PARAM_IDENT_PT 12 89 90/* Device Model domain, defaults to 0. */ 91#define HVM_PARAM_DM_DOMAIN 13 92 93/* ACPI S state: currently support S0 and S3 on x86. */ 94#define HVM_PARAM_ACPI_S_STATE 14 95 96#define HVM_NR_PARAMS 15 97 98#ifdef XENHVM 99/** 100 * Retrieve an HVM setting from the hypervisor. 101 * 102 * \param index The index of the HVM parameter to retrieve. 103 * 104 * \return On error, 0. Otherwise the value of the requested parameter. 105 */ 106static inline unsigned long 107hvm_get_parameter(int index) 108{ 109 struct xen_hvm_param xhv; 110 int error; 111 112 xhv.domid = DOMID_SELF; 113 xhv.index = index; 114 error = HYPERVISOR_hvm_op(HVMOP_get_param, &xhv); 115 if (error) { 116 printf("hvm_get_parameter: failed to get %d, error %d\n", 117 index, error); 118 return (0); 119 } 120 return (xhv.value); 121} 122#endif 123 124#endif /* __XEN_PUBLIC_HVM_PARAMS_H__ */ 125