dd17143fce
FEAT_PAN3 adds an EPAN bit to SCTLR_EL1 and SCTLR_EL2, which allows the PAN bit to make memory non-privileged-read/write if it is user-executable as well as if it is user-read/write. Implement this feature and enable it in the AArch64 'max' CPU. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20230331145045.2584941-4-peter.maydell@linaro.org
138 lines
6.0 KiB
ReStructuredText
138 lines
6.0 KiB
ReStructuredText
.. _Arm Emulation:
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A-profile CPU architecture support
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==================================
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QEMU's TCG emulation includes support for the Armv5, Armv6, Armv7 and
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Armv8 versions of the A-profile architecture. It also has support for
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the following architecture extensions:
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- FEAT_AA32BF16 (AArch32 BFloat16 instructions)
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- FEAT_AA32HPD (AArch32 hierarchical permission disables)
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- FEAT_AA32I8MM (AArch32 Int8 matrix multiplication instructions)
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- FEAT_AES (AESD and AESE instructions)
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- FEAT_BBM at level 2 (Translation table break-before-make levels)
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- FEAT_BF16 (AArch64 BFloat16 instructions)
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- FEAT_BTI (Branch Target Identification)
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- FEAT_CSV2 (Cache speculation variant 2)
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- FEAT_CSV2_1p1 (Cache speculation variant 2, version 1.1)
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- FEAT_CSV2_1p2 (Cache speculation variant 2, version 1.2)
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- FEAT_CSV2_2 (Cache speculation variant 2, version 2)
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- FEAT_CSV3 (Cache speculation variant 3)
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- FEAT_DGH (Data gathering hint)
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- FEAT_DIT (Data Independent Timing instructions)
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- FEAT_DPB (DC CVAP instruction)
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- FEAT_Debugv8p2 (Debug changes for v8.2)
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- FEAT_Debugv8p4 (Debug changes for v8.4)
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- FEAT_DotProd (Advanced SIMD dot product instructions)
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- FEAT_DoubleFault (Double Fault Extension)
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- FEAT_E0PD (Preventing EL0 access to halves of address maps)
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- FEAT_ETS (Enhanced Translation Synchronization)
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- FEAT_EVT (Enhanced Virtualization Traps)
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- FEAT_FCMA (Floating-point complex number instructions)
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- FEAT_FGT (Fine-Grained Traps)
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- FEAT_FHM (Floating-point half-precision multiplication instructions)
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- FEAT_FP16 (Half-precision floating-point data processing)
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- FEAT_FRINTTS (Floating-point to integer instructions)
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- FEAT_FlagM (Flag manipulation instructions v2)
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- FEAT_FlagM2 (Enhancements to flag manipulation instructions)
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- FEAT_GTG (Guest translation granule size)
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- FEAT_HAFDBS (Hardware management of the access flag and dirty bit state)
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- FEAT_HCX (Support for the HCRX_EL2 register)
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- FEAT_HPDS (Hierarchical permission disables)
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- FEAT_I8MM (AArch64 Int8 matrix multiplication instructions)
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- FEAT_IDST (ID space trap handling)
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- FEAT_IESB (Implicit error synchronization event)
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- FEAT_JSCVT (JavaScript conversion instructions)
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- FEAT_LOR (Limited ordering regions)
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- FEAT_LPA (Large Physical Address space)
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- FEAT_LPA2 (Large Physical and virtual Address space v2)
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- FEAT_LRCPC (Load-acquire RCpc instructions)
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- FEAT_LRCPC2 (Load-acquire RCpc instructions v2)
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- FEAT_LSE (Large System Extensions)
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- FEAT_LVA (Large Virtual Address space)
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- FEAT_MTE (Memory Tagging Extension)
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- FEAT_MTE2 (Memory Tagging Extension)
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- FEAT_MTE3 (MTE Asymmetric Fault Handling)
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- FEAT_PAN (Privileged access never)
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- FEAT_PAN2 (AT S1E1R and AT S1E1W instruction variants affected by PSTATE.PAN)
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- FEAT_PAN3 (Support for SCTLR_ELx.EPAN)
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- FEAT_PAuth (Pointer authentication)
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- FEAT_PMULL (PMULL, PMULL2 instructions)
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- FEAT_PMUv3p1 (PMU Extensions v3.1)
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- FEAT_PMUv3p4 (PMU Extensions v3.4)
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- FEAT_PMUv3p5 (PMU Extensions v3.5)
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- FEAT_RAS (Reliability, availability, and serviceability)
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- FEAT_RASv1p1 (RAS Extension v1.1)
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- FEAT_RDM (Advanced SIMD rounding double multiply accumulate instructions)
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- FEAT_RNG (Random number generator)
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- FEAT_S2FWB (Stage 2 forced Write-Back)
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- FEAT_SB (Speculation Barrier)
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- FEAT_SEL2 (Secure EL2)
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- FEAT_SHA1 (SHA1 instructions)
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- FEAT_SHA256 (SHA256 instructions)
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- FEAT_SHA3 (Advanced SIMD SHA3 instructions)
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- FEAT_SHA512 (Advanced SIMD SHA512 instructions)
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- FEAT_SM3 (Advanced SIMD SM3 instructions)
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- FEAT_SM4 (Advanced SIMD SM4 instructions)
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- FEAT_SME (Scalable Matrix Extension)
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- FEAT_SME_FA64 (Full A64 instruction set in Streaming SVE mode)
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- FEAT_SME_F64F64 (Double-precision floating-point outer product instructions)
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- FEAT_SME_I16I64 (16-bit to 64-bit integer widening outer product instructions)
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- FEAT_SPECRES (Speculation restriction instructions)
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- FEAT_SSBS (Speculative Store Bypass Safe)
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- FEAT_TLBIOS (TLB invalidate instructions in Outer Shareable domain)
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- FEAT_TLBIRANGE (TLB invalidate range instructions)
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- FEAT_TTCNP (Translation table Common not private translations)
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- FEAT_TTL (Translation Table Level)
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- FEAT_TTST (Small translation tables)
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- FEAT_UAO (Unprivileged Access Override control)
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- FEAT_VHE (Virtualization Host Extensions)
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- FEAT_VMID16 (16-bit VMID)
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- FEAT_XNX (Translation table stage 2 Unprivileged Execute-never)
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- SVE (The Scalable Vector Extension)
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- SVE2 (The Scalable Vector Extension v2)
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For information on the specifics of these extensions, please refer
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to the `Armv8-A Arm Architecture Reference Manual
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<https://developer.arm.com/documentation/ddi0487/latest>`_.
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When a specific named CPU is being emulated, only those features which
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are present in hardware for that CPU are emulated. (If a feature is
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not in the list above then it is not supported, even if the real
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hardware should have it.) The ``max`` CPU enables all features.
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R-profile CPU architecture support
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==================================
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QEMU's TCG emulation support for R-profile CPUs is currently limited.
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We emulate only the Cortex-R5 and Cortex-R5F CPUs.
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M-profile CPU architecture support
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==================================
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QEMU's TCG emulation includes support for Armv6-M, Armv7-M, Armv8-M, and
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Armv8.1-M versions of the M-profile architucture. It also has support
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for the following architecture extensions:
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- FP (Floating-point Extension)
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- FPCXT (FPCXT access instructions)
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- HP (Half-precision floating-point instructions)
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- LOB (Low Overhead loops and Branch future)
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- M (Main Extension)
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- MPU (Memory Protection Unit Extension)
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- PXN (Privileged Execute Never)
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- RAS (Reliability, Serviceability and Availability): "minimum RAS Extension" only
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- S (Security Extension)
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- ST (System Timer Extension)
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For information on the specifics of these extensions, please refer
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to the `Armv8-M Arm Architecture Reference Manual
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<https://developer.arm.com/documentation/ddi0553/latest>`_.
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When a specific named CPU is being emulated, only those features which
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are present in hardware for that CPU are emulated. (If a feature is
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not in the list above then it is not supported, even if the real
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hardware should have it.) There is no equivalent of the ``max`` CPU for
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M-profile.
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