| .. _Arm Emulation: |
| |
| A-profile CPU architecture support |
| ================================== |
| |
| QEMU's TCG emulation includes support for the Armv5, Armv6, Armv7 and |
| Armv8 versions of the A-profile architecture. It also has support for |
| the following architecture extensions: |
| |
| - FEAT_AA32BF16 (AArch32 BFloat16 instructions) |
| - FEAT_AA32HPD (AArch32 hierarchical permission disables) |
| - FEAT_AA32I8MM (AArch32 Int8 matrix multiplication instructions) |
| - FEAT_AES (AESD and AESE instructions) |
| - FEAT_BBM at level 2 (Translation table break-before-make levels) |
| - FEAT_BF16 (AArch64 BFloat16 instructions) |
| - FEAT_BTI (Branch Target Identification) |
| - FEAT_CSV2 (Cache speculation variant 2) |
| - FEAT_CSV2_1p1 (Cache speculation variant 2, version 1.1) |
| - FEAT_CSV2_1p2 (Cache speculation variant 2, version 1.2) |
| - FEAT_CSV2_2 (Cache speculation variant 2, version 2) |
| - FEAT_CSV3 (Cache speculation variant 3) |
| - FEAT_DGH (Data gathering hint) |
| - FEAT_DIT (Data Independent Timing instructions) |
| - FEAT_DPB (DC CVAP instruction) |
| - FEAT_Debugv8p2 (Debug changes for v8.2) |
| - FEAT_Debugv8p4 (Debug changes for v8.4) |
| - FEAT_DotProd (Advanced SIMD dot product instructions) |
| - FEAT_DoubleFault (Double Fault Extension) |
| - FEAT_E0PD (Preventing EL0 access to halves of address maps) |
| - FEAT_ETS (Enhanced Translation Synchronization) |
| - FEAT_EVT (Enhanced Virtualization Traps) |
| - FEAT_FCMA (Floating-point complex number instructions) |
| - FEAT_FGT (Fine-Grained Traps) |
| - FEAT_FHM (Floating-point half-precision multiplication instructions) |
| - FEAT_FP16 (Half-precision floating-point data processing) |
| - FEAT_FRINTTS (Floating-point to integer instructions) |
| - FEAT_FlagM (Flag manipulation instructions v2) |
| - FEAT_FlagM2 (Enhancements to flag manipulation instructions) |
| - FEAT_GTG (Guest translation granule size) |
| - FEAT_HAFDBS (Hardware management of the access flag and dirty bit state) |
| - FEAT_HCX (Support for the HCRX_EL2 register) |
| - FEAT_HPDS (Hierarchical permission disables) |
| - FEAT_I8MM (AArch64 Int8 matrix multiplication instructions) |
| - FEAT_IDST (ID space trap handling) |
| - FEAT_IESB (Implicit error synchronization event) |
| - FEAT_JSCVT (JavaScript conversion instructions) |
| - FEAT_LOR (Limited ordering regions) |
| - FEAT_LPA (Large Physical Address space) |
| - FEAT_LPA2 (Large Physical and virtual Address space v2) |
| - FEAT_LRCPC (Load-acquire RCpc instructions) |
| - FEAT_LRCPC2 (Load-acquire RCpc instructions v2) |
| - FEAT_LSE (Large System Extensions) |
| - FEAT_LSE2 (Large System Extensions v2) |
| - FEAT_LVA (Large Virtual Address space) |
| - FEAT_MTE (Memory Tagging Extension) |
| - FEAT_MTE2 (Memory Tagging Extension) |
| - FEAT_MTE3 (MTE Asymmetric Fault Handling) |
| - FEAT_PAN (Privileged access never) |
| - FEAT_PAN2 (AT S1E1R and AT S1E1W instruction variants affected by PSTATE.PAN) |
| - FEAT_PAN3 (Support for SCTLR_ELx.EPAN) |
| - FEAT_PAuth (Pointer authentication) |
| - FEAT_PMULL (PMULL, PMULL2 instructions) |
| - FEAT_PMUv3p1 (PMU Extensions v3.1) |
| - FEAT_PMUv3p4 (PMU Extensions v3.4) |
| - FEAT_PMUv3p5 (PMU Extensions v3.5) |
| - FEAT_RAS (Reliability, availability, and serviceability) |
| - FEAT_RASv1p1 (RAS Extension v1.1) |
| - FEAT_RDM (Advanced SIMD rounding double multiply accumulate instructions) |
| - FEAT_RME (Realm Management Extension) (NB: support status in QEMU is experimental) |
| - FEAT_RNG (Random number generator) |
| - FEAT_S2FWB (Stage 2 forced Write-Back) |
| - FEAT_SB (Speculation Barrier) |
| - FEAT_SEL2 (Secure EL2) |
| - FEAT_SHA1 (SHA1 instructions) |
| - FEAT_SHA256 (SHA256 instructions) |
| - FEAT_SHA3 (Advanced SIMD SHA3 instructions) |
| - FEAT_SHA512 (Advanced SIMD SHA512 instructions) |
| - FEAT_SM3 (Advanced SIMD SM3 instructions) |
| - FEAT_SM4 (Advanced SIMD SM4 instructions) |
| - FEAT_SME (Scalable Matrix Extension) |
| - FEAT_SME_FA64 (Full A64 instruction set in Streaming SVE mode) |
| - FEAT_SME_F64F64 (Double-precision floating-point outer product instructions) |
| - FEAT_SME_I16I64 (16-bit to 64-bit integer widening outer product instructions) |
| - FEAT_SPECRES (Speculation restriction instructions) |
| - FEAT_SSBS (Speculative Store Bypass Safe) |
| - FEAT_TLBIOS (TLB invalidate instructions in Outer Shareable domain) |
| - FEAT_TLBIRANGE (TLB invalidate range instructions) |
| - FEAT_TTCNP (Translation table Common not private translations) |
| - FEAT_TTL (Translation Table Level) |
| - FEAT_TTST (Small translation tables) |
| - FEAT_UAO (Unprivileged Access Override control) |
| - FEAT_VHE (Virtualization Host Extensions) |
| - FEAT_VMID16 (16-bit VMID) |
| - FEAT_XNX (Translation table stage 2 Unprivileged Execute-never) |
| - SVE (The Scalable Vector Extension) |
| - SVE2 (The Scalable Vector Extension v2) |
| |
| For information on the specifics of these extensions, please refer |
| to the `Armv8-A Arm Architecture Reference Manual |
| <https://developer.arm.com/documentation/ddi0487/latest>`_. |
| |
| When a specific named CPU is being emulated, only those features which |
| are present in hardware for that CPU are emulated. (If a feature is |
| not in the list above then it is not supported, even if the real |
| hardware should have it.) The ``max`` CPU enables all features. |
| |
| R-profile CPU architecture support |
| ================================== |
| |
| QEMU's TCG emulation support for R-profile CPUs is currently limited. |
| We emulate only the Cortex-R5 and Cortex-R5F CPUs. |
| |
| M-profile CPU architecture support |
| ================================== |
| |
| QEMU's TCG emulation includes support for Armv6-M, Armv7-M, Armv8-M, and |
| Armv8.1-M versions of the M-profile architucture. It also has support |
| for the following architecture extensions: |
| |
| - FP (Floating-point Extension) |
| - FPCXT (FPCXT access instructions) |
| - HP (Half-precision floating-point instructions) |
| - LOB (Low Overhead loops and Branch future) |
| - M (Main Extension) |
| - MPU (Memory Protection Unit Extension) |
| - PXN (Privileged Execute Never) |
| - RAS (Reliability, Serviceability and Availability): "minimum RAS Extension" only |
| - S (Security Extension) |
| - ST (System Timer Extension) |
| |
| For information on the specifics of these extensions, please refer |
| to the `Armv8-M Arm Architecture Reference Manual |
| <https://developer.arm.com/documentation/ddi0553/latest>`_. |
| |
| When a specific named CPU is being emulated, only those features which |
| are present in hardware for that CPU are emulated. (If a feature is |
| not in the list above then it is not supported, even if the real |
| hardware should have it.) There is no equivalent of the ``max`` CPU for |
| M-profile. |
