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* target/riscv: Implement second stage MMUAlistair Francis2020-02-272-19/+175
| | | | | | Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Allow specifying MMU stageAlistair Francis2020-02-271-9/+28
| | | | | | Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Respect MPRV and SPRV for floating point opsAlistair Francis2020-02-271-1/+15
| | | | | | | | | | | mark_fs_dirty() is the only place in translate.c that uses the virt_enabled bool. Let's respect the contents of MSTATUS.MPRV and HSTATUS.SPRV when setting the bool as this is used for performing floating point operations when V=0. Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Mark both sstatus and msstatus_hs as dirtyAlistair Francis2020-02-271-0/+13
| | | | | | | | Mark both sstatus and vsstatus as dirty (3). Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Disable guest FP support based on virtual statusAlistair Francis2020-02-271-0/+3
| | | | | | | | | | When the Hypervisor extension is in use we only enable floating point support when both status and vsstatus have enabled floating point support. Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Only set TB flags with FP status if enabledAlistair Francis2020-02-271-1/+4
| | | | | | Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Remove the hret instructionAlistair Francis2020-02-272-6/+0Star
| | | | | | | | | The hret instruction does not exist in the new spec versions, so remove it from QEMU. Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Add hfence instructionsAlistair Francis2020-02-272-9/+54
| | | | | | Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmer@sifive.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Add Hypervisor trap return supportAlistair Francis2020-02-271-10/+52
| | | | | | Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmer@sifive.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Add hypvervisor trap supportAlistair Francis2020-02-271-10/+59
| | | | | | Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Generate illegal instruction on WFI when V=1Alistair Francis2020-02-271-2/+3
| | | | | | Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmer@sifive.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/ricsv: Flush the TLB on virtulisation mode changesAlistair Francis2020-02-271-0/+5
| | | | | | | | | | To ensure our TLB isn't out-of-date we flush it on all virt mode changes. Unlike priv mode this isn't saved in the mmu_idx as all guests share V=1. The easiest option is just to flush on all changes. Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmer@sifive.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Add support for virtual interrupt settingAlistair Francis2020-02-271-5/+28
| | | | | | Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Extend the SIP CSR to support virtulisationAlistair Francis2020-02-271-1/+12
| | | | | | Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Extend the MIE CSR to support virtulisationAlistair Francis2020-02-271-4/+20
| | | | | | Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Set VS bits in mideleg for Hyp extensionAlistair Francis2020-02-271-0/+3
| | | | | | Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Add virtual register swapping functionAlistair Francis2020-02-273-0/+79
| | | | | | Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Add Hypervisor machine CSRs accessesAlistair Francis2020-02-271-0/+27
| | | | | | Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Add Hypervisor virtual CSRs accessesAlistair Francis2020-02-271-0/+116
| | | | | | Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmer@sifive.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Add Hypervisor CSR access functionsAlistair Francis2020-02-271-2/+134
| | | | | | Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Dump Hypervisor registers if enabledAlistair Francis2020-02-271-0/+33
| | | | | | | | | | | Dump the Hypervisor registers and the current Hypervisor state. While we are editing this code let's also dump stvec and scause. Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Atish Patra <atish.patra@wdc.com> Reviewed-by: Palmer Dabbelt <palmer@sifive.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Print priv and virt in disas logAlistair Francis2020-02-271-0/+8
| | | | | | Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmer@sifive.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Fix CSR perm checking for HS modeAlistair Francis2020-02-271-4/+14
| | | | | | | | | Update the CSR permission checking to work correctly when we are in HS-mode. Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Add the force HS exception modeAlistair Francis2020-02-273-0/+26
| | | | | | | | | | | Add a FORCE_HS_EXCEP mode to the RISC-V virtulisation status. This bit specifies if an exeption should be taken to HS mode no matter the current delegation status. This is used when an exeption must be taken to HS mode, such as when handling interrupts. Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Add the virtulisation modeAlistair Francis2020-02-273-0/+25
| | | | | | Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Rename the H irqs to VS irqsAlistair Francis2020-02-272-9/+9
| | | | | | Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Add support for the new execption numbersAlistair Francis2020-02-274-20/+37
| | | | | | | | | The v0.5 Hypervisor spec add new execption numbers, let's add support for those. Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Add the Hypervisor CSRs to CPUStateAlistair Francis2020-02-273-18/+48
| | | | | | | | | Add the Hypervisor CSRs to CPUState and at the same time (to avoid bisect issues) update the CSR macros for the v0.5 Hyp spec. Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Add the Hypervisor extensionAlistair Francis2020-02-271-0/+1
| | | | | | | Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Chih-Min Chao <chihmin.chao@sifive.com> Reviewed-by: Palmer Dabbelt <palmer@sifive.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: Convert MIP CSR to target_ulongAlistair Francis2020-02-272-2/+2
| | | | | | | | | | The MIP CSR is a xlen CSR, it was only 32-bits to allow atomic access. Now that we don't use atomics for MIP we can change this back to a xlen CSR. Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
* target/riscv: progressively load the instruction during decodeAlex Bennée2020-02-252-23/+25
| | | | | | | | | | | | | | | | | The plugin system would throw up a harmless warning when it detected that a disassembly of an instruction didn't use all it's bytes. Fix the riscv decoder to only load the instruction bytes it needs as it needs them. This drops opcode from the ctx in favour if passing the appropriately sized opcode down a few levels of the decode. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Robert Foley <robert.foley@linaro.org> Message-Id: <20200225124710.14152-15-alex.bennee@linaro.org>
* Merge branch 'exec_rw_const_v4' of https://github.com/philmd/qemu into HEADPaolo Bonzini2020-02-257-19/+18Star
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| * Avoid cpu_physical_memory_rw() with a constant is_write argumentPhilippe Mathieu-Daudé2020-02-201-2/+2
| | | | | | | | | | | | | | | | | | This commit was produced with the included Coccinelle script scripts/coccinelle/exec_rw_const. Inspired-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
| * Let cpu_[physical]_memory() calls pass a boolean 'is_write' argumentPhilippe Mathieu-Daudé2020-02-203-6/+6
| | | | | | | | | | | | | | | | | | Use an explicit boolean type. This commit was produced with the included Coccinelle script scripts/coccinelle/exec_rw_const. Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
| * Avoid address_space_rw() with a constant is_write argumentPeter Maydell2020-02-202-10/+9Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The address_space_rw() function allows either reads or writes depending on the is_write argument passed to it; this is useful when the direction of the access is determined programmatically (as for instance when handling the KVM_EXIT_MMIO exit reason). Under the hood it just calls either address_space_write() or address_space_read_full(). We also use it a lot with a constant is_write argument, though, which has two issues: * when reading "address_space_rw(..., 1)" this is less immediately clear to the reader as being a write than "address_space_write(...)" * calling address_space_rw() bypasses the optimization in address_space_read() that fast-paths reads of a fixed length This commit was produced with the included Coccinelle script scripts/coccinelle/exec_rw_const.cocci. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Laurent Vivier <lvivier@redhat.com> Reviewed-by: Cédric Le Goater <clg@kaod.org> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Message-Id: <20200218112457.22712-1-peter.maydell@linaro.org> [PMD: Update macvm_set_cr0() reported by Laurent Vivier] Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
| * Let address_space_rw() calls pass a boolean 'is_write' argumentPhilippe Mathieu-Daudé2020-02-202-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | Since its introduction in commit ac1970fbe8, address_space_rw() takes a boolean 'is_write' argument. Fix the codebase by using an explicit boolean type. This commit was produced with the included Coccinelle script scripts/coccinelle/exec_rw_const. Inspired-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
| * Remove unnecessary cast when using the cpu_[physical]_memory APIPhilippe Mathieu-Daudé2020-02-201-3/+3
| | | | | | | | | | | | | | | | This commit was produced with the included Coccinelle script scripts/coccinelle/exec_rw_const. Suggested-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
| * Remove unnecessary cast when using the address_space APIPhilippe Mathieu-Daudé2020-02-204-4/+4
| | | | | | | | | | | | | | | | | | | | | | This commit was produced with the included Coccinelle script scripts/coccinelle/exec_rw_const. Two lines in hw/net/dp8393x.c that Coccinelle produced that were over 80 characters were re-wrapped by hand. Suggested-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* | target/i386: check for empty register in FXAMPaolo Bonzini2020-02-251-1/+5
| | | | | | | | | | | | | | | | The fxam instruction returns the wrong result after fdecstp or after an underflow. Check fptags to handle this. Reported-by: <chengang@emindsoft.com.cn> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* | target/arm: Set MVFR0.FPSP for ARMv5 cpusRichard Henderson2020-02-211-4/+6
| | | | | | | | | | | | | | | | | | | | | | We are going to convert FEATURE tests to ISAR tests, so FPSP needs to be set for these cpus, like we have already for FPDP. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20200214181547.21408-5-richard.henderson@linaro.org Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* | target/arm: Use isar_feature_aa32_simd_r32 more placesRichard Henderson2020-02-213-13/+11Star
| | | | | | | | | | | | | | | | | | | | | | Many uses of ARM_FEATURE_VFP3 are testing for the number of simd registers implemented. Use the proper test vs MVFR0.SIMDReg. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20200214181547.21408-4-richard.henderson@linaro.org [PMM: fix typo in commit message] Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* | target/arm: Rename isar_feature_aa32_simd_r32Richard Henderson2020-02-212-27/+28
| | | | | | | | | | | | | | | | | | | | | | | | The old name, isar_feature_aa32_fp_d32, does not reflect the MVFR0 field name, SIMDReg. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20200214181547.21408-3-richard.henderson@linaro.org Reviewed-by: Peter Maydell <peter.maydell@linaro.org> [PMM: wrapped one long line] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* | target/arm: Convert PMULL.8 to gvecRichard Henderson2020-02-216-55/+95
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We still need two different helpers, since NEON and SVE2 get the inputs from different locations within the source vector. However, we can convert both to the same internal form for computation. The sve2 helper is not used yet, but adding it with this patch helps illustrate why the neon changes are helpful. Tested-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20200216214232.4230-5-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* | target/arm: Convert PMULL.64 to gvecRichard Henderson2020-02-215-72/+39Star
| | | | | | | | | | | | | | | | | | | | The gvec form will be needed for implementing SVE2. Tested-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20200216214232.4230-4-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* | target/arm: Convert PMUL.8 to gvecRichard Henderson2020-02-215-37/+39
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The gvec form will be needed for implementing SVE2. Extend the implementation to operate on uint64_t instead of uint32_t. Use a counted inner loop instead of terminating when op1 goes to zero, looking toward the required implementation for ARMv8.4-DIT. Tested-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20200216214232.4230-3-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* | target/arm: Vectorize USHL and SSHLRichard Henderson2020-02-216-66/+389
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | These instructions shift left or right depending on the sign of the input, and 7 bits are significant to the shift. This requires several masks and selects in addition to the actual shifts to form the complete answer. That said, the operation is still a small improvement even for two 64-bit elements -- 13 vector operations instead of 2 * 7 integer operations. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20200216214232.4230-2-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* | target/arm: Correctly implement ACTLR2, HACTLR2Peter Maydell2020-02-214-9/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The ACTLR2 and HACTLR2 AArch32 system registers didn't exist in ARMv7 or the original ARMv8. They were later added as optional registers, whose presence is signaled by the ID_MMFR4.AC2 field. From ARMv8.2 they are mandatory (ie ID_MMFR4.AC2 must be non-zero). We implemented HACTLR2 in commit 0e0456ab8895a5e85, but we incorrectly made it exist for all v8 CPUs, and we didn't implement ACTLR2 at all. Sort this out by implementing both registers only when they are supposed to exist, and setting the ID_MMFR4 bit for -cpu max. Note that this removes HACTLR2 from our Cortex-A53, -A47 and -A72 CPU models; this is correct, because those CPUs do not implement this register. Fixes: 0e0456ab8895a5e85 Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20200214175116.9164-22-peter.maydell@linaro.org
* | target/arm: Use FIELD_EX32 for testing 32-bit fieldsPeter Maydell2020-02-211-9/+9
| | | | | | | | | | | | | | | | | | | | Cut-and-paste errors mean we're using FIELD_EX64() to extract fields from some 32-bit ID register fields. Use FIELD_EX32() instead. (This makes no difference in behaviour, it's just more consistent.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20200214175116.9164-21-peter.maydell@linaro.org
* | target/arm: Use isar_feature function for testing AA32HPD featurePeter Maydell2020-02-212-2/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | Now we have moved ID_MMFR4 into the ARMISARegisters struct, we can define and use an isar_feature for the presence of the ARMv8.2-AA32HPD feature, rather than open-coding the test. While we're here, correct a comment typo which missed an 'A' from the feature name. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20200214175116.9164-20-peter.maydell@linaro.org
* | target/arm: Test correct register in aa32_pan and aa32_ats1e1 checksPeter Maydell2020-02-216-79/+106
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The isar_feature_aa32_pan and isar_feature_aa32_ats1e1 functions are supposed to be testing fields in ID_MMFR3; but a cut-and-paste error meant we were looking at MVFR0 instead. Fix the functions to look at the right register; this requires us to move at least id_mmfr3 to the ARMISARegisters struct; we choose to move all the ID_MMFRn registers for consistency. Fixes: 3d6ad6bb466f Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20200214175116.9164-19-peter.maydell@linaro.org
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