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source: vbox/trunk/src/VBox/VMM/include/CPUMInternal.h@ 98103

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1/* $Id: CPUMInternal.h 98103 2023-01-17 14:15:46Z vboxsync $ */
2/** @file
3 * CPUM - Internal header file.
4 */
5
6/*
7 * Copyright (C) 2006-2023 Oracle and/or its affiliates.
8 *
9 * This file is part of VirtualBox base platform packages, as
10 * available from https://www.virtualbox.org.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, in version 3 of the
15 * License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <https://www.gnu.org/licenses>.
24 *
25 * SPDX-License-Identifier: GPL-3.0-only
26 */
27
28#ifndef VMM_INCLUDED_SRC_include_CPUMInternal_h
29#define VMM_INCLUDED_SRC_include_CPUMInternal_h
30#ifndef RT_WITHOUT_PRAGMA_ONCE
31# pragma once
32#endif
33
34#ifndef VBOX_FOR_DTRACE_LIB
35# include <VBox/cdefs.h>
36# include <VBox/types.h>
37# include <VBox/vmm/stam.h>
38# include <iprt/x86.h>
39# include <VBox/vmm/pgm.h>
40#else
41# pragma D depends_on library x86.d
42# pragma D depends_on library cpumctx.d
43# pragma D depends_on library cpum.d
44
45/* Some fudging. */
46typedef uint64_t STAMCOUNTER;
47#endif
48
49
50
51
52/** @defgroup grp_cpum_int Internals
53 * @ingroup grp_cpum
54 * @internal
55 * @{
56 */
57
58/** Use flags (CPUM::fUseFlags).
59 * (Don't forget to sync this with CPUMInternal.mac !)
60 * @note Was part of saved state (6.1 and earlier).
61 * @{ */
62/** Indicates that we've saved the host FPU, SSE, whatever state and that it
63 * needs to be restored. */
64#define CPUM_USED_FPU_HOST RT_BIT(0)
65/** Indicates that we've loaded the guest FPU, SSE, whatever state and that it
66 * needs to be saved.
67 * @note Mirrored in CPUMCTX::fUsedFpuGuest for the HM switcher code. */
68#define CPUM_USED_FPU_GUEST RT_BIT(10)
69/** Used the guest FPU, SSE or such stuff since last we were in REM.
70 * REM syncing is clearing this, lazy FPU is setting it. */
71#define CPUM_USED_FPU_SINCE_REM RT_BIT(1)
72/** The XMM state was manually restored. (AMD only) */
73#define CPUM_USED_MANUAL_XMM_RESTORE RT_BIT(2)
74
75/** Host OS is using SYSENTER and we must NULL the CS. */
76#define CPUM_USE_SYSENTER RT_BIT(3)
77/** Host OS is using SYSENTER and we must NULL the CS. */
78#define CPUM_USE_SYSCALL RT_BIT(4)
79
80/** Debug registers are used by host and that DR7 and DR6 must be saved and
81 * disabled when switching to raw-mode. */
82#define CPUM_USE_DEBUG_REGS_HOST RT_BIT(5)
83/** Records that we've saved the host DRx registers.
84 * In ring-0 this means all (DR0-7), while in raw-mode context this means DR0-3
85 * since DR6 and DR7 are covered by CPUM_USE_DEBUG_REGS_HOST. */
86#define CPUM_USED_DEBUG_REGS_HOST RT_BIT(6)
87/** Set to indicate that we should save host DR0-7 and load the hypervisor debug
88 * registers in the raw-mode world switchers. (See CPUMRecalcHyperDRx.) */
89#define CPUM_USE_DEBUG_REGS_HYPER RT_BIT(7)
90/** Used in ring-0 to indicate that we have loaded the hypervisor debug
91 * registers. */
92#define CPUM_USED_DEBUG_REGS_HYPER RT_BIT(8)
93/** Used in ring-0 to indicate that we have loaded the guest debug
94 * registers (DR0-3 and maybe DR6) for direct use by the guest.
95 * DR7 (and AMD-V DR6) are handled via the VMCB. */
96#define CPUM_USED_DEBUG_REGS_GUEST RT_BIT(9)
97
98/** Host CPU requires fxsave/fxrstor leaky bit handling. */
99#define CPUM_USE_FFXSR_LEAKY RT_BIT(19)
100/** Set if the VM supports long-mode. */
101#define CPUM_USE_SUPPORTS_LONGMODE RT_BIT(20)
102/** @} */
103
104
105/** @name CPUM Saved State Version.
106 * @{ */
107/** The current saved state version. */
108#define CPUM_SAVED_STATE_VERSION CPUM_SAVED_STATE_VERSION_HWVIRT_VMX_3
109/** The saved state version with more virtual VMCS fields (HLAT prefix size,
110 * PCONFIG-exiting bitmap, HLAT ptr, VM-exit ctls2) and a CPUMCTX field (VM-exit
111 * ctls2 MSR). */
112#define CPUM_SAVED_STATE_VERSION_HWVIRT_VMX_3 22
113/** The saved state version with PAE PDPEs added. */
114#define CPUM_SAVED_STATE_VERSION_PAE_PDPES 21
115/** The saved state version with more virtual VMCS fields and CPUMCTX VMX fields. */
116#define CPUM_SAVED_STATE_VERSION_HWVIRT_VMX_2 20
117/** The saved state version including VMX hardware virtualization state. */
118#define CPUM_SAVED_STATE_VERSION_HWVIRT_VMX 19
119/** The saved state version including SVM hardware virtualization state. */
120#define CPUM_SAVED_STATE_VERSION_HWVIRT_SVM 18
121/** The saved state version including XSAVE state. */
122#define CPUM_SAVED_STATE_VERSION_XSAVE 17
123/** The saved state version with good CPUID leaf count. */
124#define CPUM_SAVED_STATE_VERSION_GOOD_CPUID_COUNT 16
125/** CPUID changes with explode forgetting to update the leaf count on
126 * restore, resulting in garbage being saved restoring+saving old states). */
127#define CPUM_SAVED_STATE_VERSION_BAD_CPUID_COUNT 15
128/** The saved state version before the CPUIDs changes. */
129#define CPUM_SAVED_STATE_VERSION_PUT_STRUCT 14
130/** The saved state version before using SSMR3PutStruct. */
131#define CPUM_SAVED_STATE_VERSION_MEM 13
132/** The saved state version before introducing the MSR size field. */
133#define CPUM_SAVED_STATE_VERSION_NO_MSR_SIZE 12
134/** The saved state version of 3.2, 3.1 and 3.3 trunk before the hidden
135 * selector register change (CPUM_CHANGED_HIDDEN_SEL_REGS_INVALID). */
136#define CPUM_SAVED_STATE_VERSION_VER3_2 11
137/** The saved state version of 3.0 and 3.1 trunk before the teleportation
138 * changes. */
139#define CPUM_SAVED_STATE_VERSION_VER3_0 10
140/** The saved state version for the 2.1 trunk before the MSR changes. */
141#define CPUM_SAVED_STATE_VERSION_VER2_1_NOMSR 9
142/** The saved state version of 2.0, used for backwards compatibility. */
143#define CPUM_SAVED_STATE_VERSION_VER2_0 8
144/** The saved state version of 1.6, used for backwards compatibility. */
145#define CPUM_SAVED_STATE_VERSION_VER1_6 6
146/** @} */
147
148
149/** @name XSAVE limits.
150 * @{ */
151/** Max size we accept for the XSAVE area.
152 * @see CPUMCTX::abXSave */
153#define CPUM_MAX_XSAVE_AREA_SIZE (0x4000 - 0x300)
154/* Min size we accept for the XSAVE area. */
155#define CPUM_MIN_XSAVE_AREA_SIZE 0x240
156/** @} */
157
158
159/**
160 * CPU info
161 */
162typedef struct CPUMINFO
163{
164 /** The number of MSR ranges (CPUMMSRRANGE) in the array pointed to below. */
165 uint32_t cMsrRanges;
166 /** Mask applied to ECX before looking up the MSR for a RDMSR/WRMSR
167 * instruction. Older hardware has been observed to ignore higher bits. */
168 uint32_t fMsrMask;
169
170 /** MXCSR mask. */
171 uint32_t fMxCsrMask;
172
173 /** The number of CPUID leaves (CPUMCPUIDLEAF) in the array pointed to below. */
174 uint32_t cCpuIdLeaves;
175 /** The index of the first extended CPUID leaf in the array.
176 * Set to cCpuIdLeaves if none present. */
177 uint32_t iFirstExtCpuIdLeaf;
178 /** How to handle unknown CPUID leaves. */
179 CPUMUNKNOWNCPUID enmUnknownCpuIdMethod;
180 /** For use with CPUMUNKNOWNCPUID_DEFAULTS (DB & VM),
181 * CPUMUNKNOWNCPUID_LAST_STD_LEAF (VM) and CPUMUNKNOWNCPUID_LAST_STD_LEAF_WITH_ECX (VM). */
182 CPUMCPUID DefCpuId;
183
184 /** Scalable bus frequency used for reporting other frequencies. */
185 uint64_t uScalableBusFreq;
186
187 /** Pointer to the MSR ranges (for compatibility with old hyper heap code). */
188 R3PTRTYPE(PCPUMMSRRANGE) paMsrRangesR3;
189 /** Pointer to the CPUID leaves (for compatibility with old hyper heap code). */
190 R3PTRTYPE(PCPUMCPUIDLEAF) paCpuIdLeavesR3;
191
192 /** CPUID leaves. */
193 CPUMCPUIDLEAF aCpuIdLeaves[256];
194 /** MSR ranges.
195 * @todo This is insane, so might want to move this into a separate
196 * allocation. The insanity is mainly for more recent AMD CPUs. */
197 CPUMMSRRANGE aMsrRanges[8192];
198} CPUMINFO;
199/** Pointer to a CPU info structure. */
200typedef CPUMINFO *PCPUMINFO;
201/** Pointer to a const CPU info structure. */
202typedef CPUMINFO const *CPCPUMINFO;
203
204
205/**
206 * The saved host CPU state.
207 */
208typedef struct CPUMHOSTCTX
209{
210 /** The extended state (FPU/SSE/AVX/AVX-2/XXXX). Must be aligned on 64 bytes. */
211 union /* no tag */
212 {
213 X86XSAVEAREA XState;
214 /** Byte view for simple indexing and space allocation.
215 * @note Must match or exceed the size of CPUMCTX::abXState. */
216 uint8_t abXState[0x4000 - 0x300];
217 } CPUM_UNION_NM(u);
218
219 /** General purpose register, selectors, flags and more
220 * @{ */
221 /** General purpose register ++
222 * { */
223 /*uint64_t rax; - scratch*/
224 uint64_t rbx;
225 /*uint64_t rcx; - scratch*/
226 /*uint64_t rdx; - scratch*/
227 uint64_t rdi;
228 uint64_t rsi;
229 uint64_t rbp;
230 uint64_t rsp;
231 /*uint64_t r8; - scratch*/
232 /*uint64_t r9; - scratch*/
233 uint64_t r10;
234 uint64_t r11;
235 uint64_t r12;
236 uint64_t r13;
237 uint64_t r14;
238 uint64_t r15;
239 /*uint64_t rip; - scratch*/
240 uint64_t rflags;
241 /** @} */
242
243 /** Selector registers
244 * @{ */
245 RTSEL ss;
246 RTSEL ssPadding;
247 RTSEL gs;
248 RTSEL gsPadding;
249 RTSEL fs;
250 RTSEL fsPadding;
251 RTSEL es;
252 RTSEL esPadding;
253 RTSEL ds;
254 RTSEL dsPadding;
255 RTSEL cs;
256 RTSEL csPadding;
257 /** @} */
258
259 /** Control registers.
260 * @{ */
261 /** The CR0 FPU state in HM mode. */
262 uint64_t cr0;
263 /*uint64_t cr2; - scratch*/
264 uint64_t cr3;
265 uint64_t cr4;
266 uint64_t cr8;
267 /** @} */
268
269 /** Debug registers.
270 * @{ */
271 uint64_t dr0;
272 uint64_t dr1;
273 uint64_t dr2;
274 uint64_t dr3;
275 uint64_t dr6;
276 uint64_t dr7;
277 /** @} */
278
279 /** Global Descriptor Table register. */
280 X86XDTR64 gdtr;
281 uint16_t gdtrPadding;
282 /** Interrupt Descriptor Table register. */
283 X86XDTR64 idtr;
284 uint16_t idtrPadding;
285 /** The task register. */
286 RTSEL ldtr;
287 RTSEL ldtrPadding;
288 /** The task register. */
289 RTSEL tr;
290 RTSEL trPadding;
291
292 /** MSRs
293 * @{ */
294 CPUMSYSENTER SysEnter;
295 uint64_t FSbase;
296 uint64_t GSbase;
297 uint64_t efer;
298 /** @} */
299
300 /** The XCR0 register. */
301 uint64_t xcr0;
302 /** The mask to pass to XSAVE/XRSTOR in EDX:EAX. If zero we use
303 * FXSAVE/FXRSTOR (since bit 0 will always be set, we only need to test it). */
304 uint64_t fXStateMask;
305
306 /* padding to get 64byte aligned size */
307 uint8_t auPadding[24];
308#if HC_ARCH_BITS != 64
309# error HC_ARCH_BITS not defined or unsupported
310#endif
311} CPUMHOSTCTX;
312#ifndef VBOX_FOR_DTRACE_LIB
313AssertCompileSizeAlignment(CPUMHOSTCTX, 64);
314#endif
315/** Pointer to the saved host CPU state. */
316typedef CPUMHOSTCTX *PCPUMHOSTCTX;
317
318
319/**
320 * The hypervisor context CPU state (just DRx left now).
321 */
322typedef struct CPUMHYPERCTX
323{
324 /** Debug registers.
325 * @remarks DR4 and DR5 should not be used since they are aliases for
326 * DR6 and DR7 respectively on both AMD and Intel CPUs.
327 * @remarks DR8-15 are currently not supported by AMD or Intel, so
328 * neither do we.
329 */
330 uint64_t dr[8];
331 /** @todo eliminiate the rest. */
332 uint64_t cr3;
333 uint64_t au64Padding[7];
334} CPUMHYPERCTX;
335#ifndef VBOX_FOR_DTRACE_LIB
336AssertCompileSizeAlignment(CPUMHYPERCTX, 64);
337#endif
338/** Pointer to the hypervisor context CPU state. */
339typedef CPUMHYPERCTX *PCPUMHYPERCTX;
340
341
342/**
343 * CPUM Data (part of VM)
344 */
345typedef struct CPUM
346{
347 /** Use flags.
348 * These flags indicates which CPU features the host uses.
349 */
350 uint32_t fHostUseFlags;
351
352 /** CR4 mask
353 * @todo obsolete? */
354 struct
355 {
356 uint32_t AndMask; /**< @todo Move these to the per-CPU structure and fix the switchers. Saves a register! */
357 uint32_t OrMask;
358 } CR4;
359
360 /** The (more) portable CPUID level. */
361 uint8_t u8PortableCpuIdLevel;
362 /** Indicates that a state restore is pending.
363 * This is used to verify load order dependencies (PGM). */
364 bool fPendingRestore;
365 uint8_t abPadding0[2];
366
367 /** XSAVE/XRTOR components we can expose to the guest mask. */
368 uint64_t fXStateGuestMask;
369 /** XSAVE/XRSTOR host mask. Only state components in this mask can be exposed
370 * to the guest. This is 0 if no XSAVE/XRSTOR bits can be exposed. */
371 uint64_t fXStateHostMask;
372
373#if defined(RT_ARCH_X86) || defined(RT_ARCH_AMD64)
374 /** The host MXCSR mask (determined at init). */
375 uint32_t fHostMxCsrMask;
376#else
377 uint32_t u32UnusedOnNonX86;
378#endif
379 uint8_t abPadding1[4];
380
381 /** Random value we store in the reserved RFLAGS bits we don't use ourselves so
382 * we can detect corruption. */
383 uint64_t fReservedRFlagsCookie;
384
385 /** Align to 64-byte boundary. */
386 uint8_t abPadding2[16];
387
388 /** Host CPU feature information.
389 * Externaly visible via the VM structure, aligned on 64-byte boundrary. */
390 CPUMFEATURES HostFeatures;
391 /** Guest CPU feature information.
392 * Externaly visible via that VM structure, aligned with HostFeatures. */
393 CPUMFEATURES GuestFeatures;
394 /** Guest CPU info. */
395 CPUMINFO GuestInfo;
396
397 /** The standard set of CpuId leaves. */
398 CPUMCPUID aGuestCpuIdPatmStd[6];
399 /** The extended set of CpuId leaves. */
400 CPUMCPUID aGuestCpuIdPatmExt[10];
401 /** The centaur set of CpuId leaves. */
402 CPUMCPUID aGuestCpuIdPatmCentaur[4];
403
404 /** @name MSR statistics.
405 * @{ */
406 STAMCOUNTER cMsrWrites;
407 STAMCOUNTER cMsrWritesToIgnoredBits;
408 STAMCOUNTER cMsrWritesRaiseGp;
409 STAMCOUNTER cMsrWritesUnknown;
410 STAMCOUNTER cMsrReads;
411 STAMCOUNTER cMsrReadsRaiseGp;
412 STAMCOUNTER cMsrReadsUnknown;
413 /** @} */
414} CPUM;
415#ifndef VBOX_FOR_DTRACE_LIB
416AssertCompileMemberOffset(CPUM, HostFeatures, 64);
417AssertCompileMemberOffset(CPUM, GuestFeatures, 112);
418#endif
419/** Pointer to the CPUM instance data residing in the shared VM structure. */
420typedef CPUM *PCPUM;
421
422/**
423 * CPUM Data (part of VMCPU)
424 */
425typedef struct CPUMCPU
426{
427 /** Guest context.
428 * Aligned on a 64-byte boundary. */
429 CPUMCTX Guest;
430 /** Guest context - misc MSRs
431 * Aligned on a 64-byte boundary. */
432 CPUMCTXMSRS GuestMsrs;
433
434 /** Nested VMX: VMX-preemption timer. */
435 TMTIMERHANDLE hNestedVmxPreemptTimer;
436
437 /** Use flags.
438 * These flags indicates both what is to be used and what has been used. */
439 uint32_t fUseFlags;
440
441 /** Changed flags.
442 * These flags indicates to REM (and others) which important guest
443 * registers which has been changed since last time the flags were cleared.
444 * See the CPUM_CHANGED_* defines for what we keep track of.
445 *
446 * @todo Obsolete, but will probably be refactored so keep it for reference. */
447 uint32_t fChanged;
448
449 /** Temporary storage for the return code of the function called in the
450 * 32-64 switcher. */
451 uint32_t u32RetCode;
452
453 /** Whether the X86_CPUID_FEATURE_EDX_APIC and X86_CPUID_AMD_FEATURE_EDX_APIC
454 * (?) bits are visible or not. (The APIC is responsible for setting this
455 * when loading state, so we won't save it.) */
456 bool fCpuIdApicFeatureVisible;
457
458 /** Align the next member on a 64-byte boundary. */
459 uint8_t abPadding2[64 - 8 - 4*3 - 1];
460
461 /** Saved host context. Only valid while inside RC or HM contexts.
462 * Must be aligned on a 64-byte boundary. */
463 CPUMHOSTCTX Host;
464 /** Old hypervisor context, only used for combined DRx values now.
465 * Must be aligned on a 64-byte boundary. */
466 CPUMHYPERCTX Hyper;
467
468#ifdef VBOX_WITH_CRASHDUMP_MAGIC
469 uint8_t aMagic[56];
470 uint64_t uMagic;
471#endif
472} CPUMCPU;
473#ifndef VBOX_FOR_DTRACE_LIB
474AssertCompileMemberAlignment(CPUMCPU, Host, 64);
475#endif
476/** Pointer to the CPUMCPU instance data residing in the shared VMCPU structure. */
477typedef CPUMCPU *PCPUMCPU;
478
479#ifndef VBOX_FOR_DTRACE_LIB
480RT_C_DECLS_BEGIN
481
482PCPUMCPUIDLEAF cpumCpuIdGetLeaf(PVM pVM, uint32_t uLeaf);
483PCPUMCPUIDLEAF cpumCpuIdGetLeafEx(PVM pVM, uint32_t uLeaf, uint32_t uSubLeaf, bool *pfExactSubLeafHit);
484PCPUMCPUIDLEAF cpumCpuIdGetLeafInt(PCPUMCPUIDLEAF paLeaves, uint32_t cLeaves, uint32_t uLeaf, uint32_t uSubLeaf);
485PCPUMCPUIDLEAF cpumCpuIdEnsureSpace(PVM pVM, PCPUMCPUIDLEAF *ppaLeaves, uint32_t cLeaves);
486# ifdef VBOX_STRICT
487void cpumCpuIdAssertOrder(PCPUMCPUIDLEAF paLeaves, uint32_t cLeaves);
488# endif
489int cpumCpuIdExplodeFeaturesX86(PCCPUMCPUIDLEAF paLeaves, uint32_t cLeaves, PCCPUMMSRS pMsrs,
490 PCPUMFEATURES pFeatures);
491
492# ifdef IN_RING3
493int cpumR3DbgInit(PVM pVM);
494int cpumR3InitCpuIdAndMsrs(PVM pVM, PCCPUMMSRS pHostMsrs);
495void cpumR3InitVmxGuestFeaturesAndMsrs(PVM pVM, PCFGMNODE pCpumCfg, PCVMXMSRS pHostVmxMsrs,
496 PVMXMSRS pGuestVmxMsrs);
497void cpumR3CpuIdRing3InitDone(PVM pVM);
498void cpumR3SaveCpuId(PVM pVM, PSSMHANDLE pSSM);
499int cpumR3LoadCpuId(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, PCCPUMMSRS pGuestMsrs);
500int cpumR3LoadCpuIdPre32(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion);
501DECLCALLBACK(void) cpumR3CpuIdInfo(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs);
502
503int cpumR3DbGetCpuInfo(const char *pszName, PCPUMINFO pInfo);
504int cpumR3MsrRangesInsert(PVM pVM, PCPUMMSRRANGE *ppaMsrRanges, uint32_t *pcMsrRanges, PCCPUMMSRRANGE pNewRange);
505int cpumR3MsrReconcileWithCpuId(PVM pVM);
506int cpumR3MsrApplyFudge(PVM pVM);
507int cpumR3MsrRegStats(PVM pVM);
508int cpumR3MsrStrictInitChecks(void);
509PCPUMMSRRANGE cpumLookupMsrRange(PVM pVM, uint32_t idMsr);
510# endif
511
512# ifdef IN_RC
513DECLASM(int) cpumHandleLazyFPUAsm(PCPUMCPU pCPUM);
514# endif
515
516# ifdef IN_RING0
517DECLASM(int) cpumR0SaveHostRestoreGuestFPUState(PCPUMCPU pCPUM);
518DECLASM(void) cpumR0SaveGuestRestoreHostFPUState(PCPUMCPU pCPUM);
519# if ARCH_BITS == 32 && defined(VBOX_WITH_64_BITS_GUESTS)
520DECLASM(void) cpumR0RestoreHostFPUState(PCPUMCPU pCPUM);
521# endif
522# endif
523
524# if defined(IN_RC) || defined(IN_RING0)
525DECLASM(int) cpumRZSaveHostFPUState(PCPUMCPU pCPUM);
526DECLASM(void) cpumRZSaveGuestFpuState(PCPUMCPU pCPUM, bool fLeaveFpuAccessible);
527DECLASM(void) cpumRZSaveGuestSseRegisters(PCPUMCPU pCPUM);
528DECLASM(void) cpumRZSaveGuestAvxRegisters(PCPUMCPU pCPUM);
529# endif
530
531RT_C_DECLS_END
532#endif /* !VBOX_FOR_DTRACE_LIB */
533
534/** @} */
535
536#endif /* !VMM_INCLUDED_SRC_include_CPUMInternal_h */
537
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