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2023-06-28exec/memory: Add symbolic value for memory listener priority for accelIsaku Yamahata
Add MEMORY_LISTNER_PRIORITY_ACCEL for the symbolic value for the memory listener to replace the hard-coded value 10 for accel. No functional change intended. Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <feebe423becc6e2aa375f59f6abce9a85bc15abb.1687279702.git.isaku.yamahata@intel.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2023-06-28target/i386/WHPX: Fix error message when fail to set ProcessorCountZhao Liu
003f230e37d7 ("machine: Tweak the order of topology members in struct CpuTopology") changes the meaning of MachineState.smp.cores from "the number of cores in one package" to "the number of cores in one die" and doesn't fix other uses of MachineState.smp.cores. And because of the introduction of cluster, now smp.cores just means "the number of cores in one cluster". This clearly does not fit the semantics here. And before this error message, WHvSetPartitionProperty() is called to set prop.ProcessorCount. So the error message should show the prop.ProcessorCount other than "cores per cluster" or "cores per package". Cc: Sunil Muthuswamy <sunilmut@microsoft.com> Signed-off-by: Zhao Liu <zhao1.liu@intel.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20230529124331.412822-1-zhao1.liu@linux.intel.com> [PMD: Use '%u' format for ProcessorCount] Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2023-06-28target/riscv: Restrict KVM-specific fields from ArchCPUPhilippe Mathieu-Daudé
These fields shouldn't be accessed when KVM is not available. Restrict the KVM timer migration state. Rename the KVM timer post_load() handler accordingly, because cpu_post_load() is too generic. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Message-Id: <20230626232007.8933-3-philmd@linaro.org>
2023-06-28target/ppc: Restrict KVM-specific fields from ArchCPUPhilippe Mathieu-Daudé
The 'kvm_sw_tlb' and 'tlb_dirty' fields introduced in commit 93dd5e852c ("kvm: ppc: booke206: use MMU API") are specific to KVM and shouldn't be accessed when it is not available. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> Message-Id: <20230624192645.13680-1-philmd@linaro.org>
2023-06-28target/arm: Restrict KVM-specific fields from ArchCPUPhilippe Mathieu-Daudé
These fields shouldn't be accessed when KVM is not available. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230405160454.97436-8-philmd@linaro.org>
2023-06-28hw/intc/arm_gic: Un-inline GIC*/ITS class_name() helpersPhilippe Mathieu-Daudé
"kvm_arm.h" contains external and internal prototype declarations. Files under the hw/ directory should only access the KVM external API. In order to avoid machine / device models to include "kvm_arm.h" simply to get the QOM GIC/ITS class name, un-inline each class name getter to the proper device model file. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230405160454.97436-4-philmd@linaro.org>
2023-06-28accel: Rename HVF 'struct hvf_vcpu_state' -> AccelCPUStatePhilippe Mathieu-Daudé
We want all accelerators to share the same opaque pointer in CPUState. Rename the 'hvf_vcpu_state' structure as 'AccelCPUState'. Use the generic 'accel' field of CPUState instead of 'hvf'. Replace g_malloc0() by g_new0() for readability. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Tested-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20230624174121.11508-17-philmd@linaro.org>
2023-06-28accel: Rename 'cpu_state' -> 'cs'Philippe Mathieu-Daudé
Most of the codebase uses 'CPUState *cpu' or 'CPUState *cs'. While 'cpu_state' is kind of explicit, it makes the code harder to review. Simply rename as 'cs'. Acked-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Tested-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20230624174121.11508-16-philmd@linaro.org>
2023-06-28accel: Inline WHPX get_whpx_vcpu()Philippe Mathieu-Daudé
No need for this helper to access the CPUState::accel field. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20230624174121.11508-15-philmd@linaro.org>
2023-06-28accel: Rename WHPX 'struct whpx_vcpu' -> AccelCPUStatePhilippe Mathieu-Daudé
We want all accelerators to share the same opaque pointer in CPUState. Rename WHPX 'whpx_vcpu' as 'AccelCPUState'; use the typedef. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230624174121.11508-14-philmd@linaro.org>
2023-06-28accel: Remove WHPX unreachable error pathPhilippe Mathieu-Daudé
g_new0() can not fail. Remove the unreachable error path. https://developer-old.gnome.org/glib/stable/glib-Memory-Allocation.html#glib-Memory-Allocation.description Reported-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230624174121.11508-13-philmd@linaro.org>
2023-06-28accel: Inline NVMM get_qemu_vcpu()Philippe Mathieu-Daudé
No need for this helper to access the CPUState::accel field. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20230624174121.11508-12-philmd@linaro.org>
2023-06-28accel: Rename NVMM 'struct qemu_vcpu' -> AccelCPUStatePhilippe Mathieu-Daudé
We want all accelerators to share the same opaque pointer in CPUState. Rename NVMM 'qemu_vcpu' as 'AccelCPUState'; directly use the typedef, remove unnecessary casts. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20230624174121.11508-11-philmd@linaro.org>
2023-06-28accel: Remove NVMM unreachable error pathPhilippe Mathieu-Daudé
g_malloc0() can not fail. Remove the unreachable error path. https://developer-old.gnome.org/glib/stable/glib-Memory-Allocation.html#glib-Memory-Allocation.description Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230624174121.11508-10-philmd@linaro.org>
2023-06-28accel: Move HAX hThread to accelerator contextPhilippe Mathieu-Daudé
hThread variable is only used by the HAX accelerator, so move it to the accelerator specific context. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230624174121.11508-9-philmd@linaro.org>
2023-06-28accel: Rename HAX 'struct hax_vcpu_state' -> AccelCPUStatePhilippe Mathieu-Daudé
We want all accelerators to share the same opaque pointer in CPUState. Start with the HAX context, renaming its forward declarated structure 'hax_vcpu_state' as 'AccelCPUState'. Document the CPUState field. Directly use the typedef. Remove the amusing but now unnecessary casts in NVMM / WHPX. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230624174121.11508-8-philmd@linaro.org>
2023-06-28accel: Rename 'hax_vcpu' as 'accel' in CPUStatePhilippe Mathieu-Daudé
All accelerators will share a single opaque context in CPUState. Start by renaming 'hax_vcpu' as 'accel'. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20230624174121.11508-7-philmd@linaro.org>
2023-06-28accel: Destroy HAX vCPU threads once donePhilippe Mathieu-Daudé
When the vCPU thread finished its processing, destroy it and signal its destruction to generic vCPU management layer. Add a sanity check for the vCPU accelerator context. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230624174121.11508-6-philmd@linaro.org>
2023-06-28accel: Fix a leak on Windows HAXPhilippe Mathieu-Daudé
hThread is only used on the error path in hax_kick_vcpu_thread(). Fixes: b0cb0a66d6 ("Plumb the HAXM-based hardware acceleration support") Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230624174121.11508-5-philmd@linaro.org>
2023-06-28accel: Remove unused hThread variable on TCG/WHPXPhilippe Mathieu-Daudé
On Windows hosts, cpu->hThread is assigned but never accessed: remove it. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230624174121.11508-4-philmd@linaro.org>
2023-06-28accel: Re-enable WHPX cross-build on case sensitive filesystemsPhilippe Mathieu-Daudé
Since MinGW commit 395dcfdea ("rename hyper-v headers and def files to lower case") [*], WinHvPlatform.h and WinHvEmulation.h got respectively renamed as winhvplatform.h / winhvemulation.h. The mingw64-headers package included in the Fedora version we use for CI does include this commit; and meson fails to detect these present-but-renamed headers while cross-building (on case-sensitive filesystems). Use the renamed header in order to detect and successfully cross-build with the WHPX accelerator. Note, on Windows hosts, the libraries are still named as WinHvPlatform.dll and WinHvEmulation.dll, so we don't bother renaming the definitions used by load_whp_dispatch_fns() in target/i386/whpx/whpx-all.c. [*] https://sourceforge.net/p/mingw-w64/mingw-w64/ci/395dcfdea Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20230624142211.8888-3-philmd@linaro.org>
2023-06-28target/sparc: Use tcg_gen_lookup_and_goto_ptr for v9 WRASIRichard Henderson
We incorporate %asi into tb->flags so that we may generate inline code for the many ASIs for which it is easy to do so. Setting %asi is common for e.g. memcpy and memset performing block copy and clear, so it is worth noticing this case. We must end the TB but do not need to return to the main loop. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230628071202.230991-9-richard.henderson@linaro.org> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2023-06-28target/sparc: Use DYNAMIC_PC_LOOKUP for v9 RETURNRichard Henderson
After the register window unwind, this is for a plain indirect branch with no further side effects. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230628071202.230991-8-richard.henderson@linaro.org> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2023-06-28target/sparc: Use DYNAMIC_PC_LOOKUP for JMPLRichard Henderson
This is for a plain indirect branch with no other side effects. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230628071202.230991-7-richard.henderson@linaro.org> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2023-06-28target/sparc: Use DYNAMIC_PC_LOOKUP for conditional branchesRichard Henderson
When resolving JUMP_PC, we know this is for a plain branch with no other side effects. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230628071202.230991-6-richard.henderson@linaro.org> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2023-06-28target/sparc: Introduce DYNAMIC_PC_LOOKUPRichard Henderson
Create a new artificial "next pc" which also indicates that nothing has changed within the cpu state which requires returning to the main loop. Pipe this new value though all pc/npc checks. Do not produce this new value yet. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20230628071202.230991-5-richard.henderson@linaro.org> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2023-06-28target/sparc: Drop inline markers from translate.cRichard Henderson
Let the compiler decide about inlining. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230628071202.230991-4-richard.henderson@linaro.org> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2023-06-28target/sparc: Fix npc comparison in sparc_tr_insn_startRichard Henderson
During translation, npc == address, DYNAMIC_PC, or JUMP_PC. It is only the encoding between here and sparc_restore_state_to_opc that considers JUMP_PC to be a bit within a larger value. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230628071202.230991-3-richard.henderson@linaro.org> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2023-06-28target/sparc: Use tcg_gen_lookup_and_goto_ptr in gen_goto_tbRichard Henderson
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230628071202.230991-2-richard.henderson@linaro.org> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2023-06-26target/microblaze: Define TCG_GUEST_DEFAULT_MORichard Henderson
The microblaze architecture does not reorder instructions. While there is an MBAR wait-for-data-access instruction, this concerns synchronizing with DMA. This should have been defined when enabling MTTCG. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Edgar E. Iglesias <edgar@zeroasic.com> Fixes: d449561b130 ("configure: microblaze: Enable mttcg") Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-06-26target: Widen pc/cs_base in cpu_get_tb_cpu_stateAnton Johansson
Signed-off-by: Anton Johansson <anjo@rev.ng> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20230621135633.1649-4-anjo@rev.ng> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-06-26Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into stagingRichard Henderson
* kvm: reuse per-vcpu stats fd to avoid vcpu interruption * Validate cluster and NUMA node boundary on ARM and RISC-V * various small TCG features from newer processors * Remove dubious 'event_notifier-posix.c' include * fix git-submodule.sh in releases # -----BEGIN PGP SIGNATURE----- # # iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmSZS0IUHHBib256aW5p # QHJlZGhhdC5jb20ACgkQv/vSX3jHroN+tgf/axJdG9NXKCyXgc0vzjKVhSR4Y+tC # EPxkg7Rq7uOMgbph9oTS/2Kzh9LnP6kLt2qnS4igRHGuEBd58yD6fFNDv0LJsK/l # B/d0WGHMKV0KMYOX24rkyfohVu37GhVRsiVSIlIiQVTC9JtYer7WxdnyoDaPKvY8 # dpbKgDrd59vAlsHrpj7ZubVQPcL3lXrLryimpDohMH6Ba+4wZq+7dKPpal97QOP2 # 3i7isUBTQiMOcVjW6GEiNcDLSJqj5DSgylhdFnaBsq/ThpC2PxWoXcCbV28QELzf # 5+J+RXQavmeWKZMR0q98iBzWbrsVtaSxAkHHiwbUMMqQvkfY6Dpo5dMHWw== # =WHE2 # -----END PGP SIGNATURE----- # gpg: Signature made Mon 26 Jun 2023 10:24:34 AM CEST # gpg: using RSA key F13338574B662389866C7682BFFBD25F78C7AE83 # gpg: issuer "pbonzini@redhat.com" # gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [undefined] # gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" [undefined] # gpg: WARNING: This key is not certified with a trusted signature! # gpg: There is no indication that the signature belongs to the owner. # Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1 # Subkey fingerprint: F133 3857 4B66 2389 866C 7682 BFFB D25F 78C7 AE83 * tag 'for-upstream' of https://gitlab.com/bonzini/qemu: git-submodule.sh: allow running in validate mode without previous update target/i386: implement SYSCALL/SYSRET in 32-bit emulators target/i386: implement RDPID in TCG target/i386: sysret and sysexit are privileged target/i386: AMD only supports SYSENTER/SYSEXIT in 32-bit mode target/i386: Intel only supports SYSCALL/SYSRET in long mode target/i386: TCG supports WBNOINVD target/i386: TCG supports XSAVEERPTR target/i386: do not accept RDSEED if CPUID bit absent target/i386: TCG supports RDSEED target/i386: TCG supports 3DNow! prefetch(w) target/i386: fix INVD vmexit kvm: reuse per-vcpu stats fd to avoid vcpu interruption hw/riscv: Validate cluster and NUMA node boundary hw/arm: Validate cluster and NUMA node boundary numa: Validate cluster and NUMA node boundary if required hw/remote/proxy: Remove dubious 'event_notifier-posix.c' include build: further refine build.ninja rules Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-06-26target/i386: implement SYSCALL/SYSRET in 32-bit emulatorsPaolo Bonzini
AMD supports both 32-bit and 64-bit SYSCALL/SYSRET, but the TCG only exposes it for 64-bit targets. For system emulation just reuse the helper; for user-mode emulation the ABI is the same as "int $80". The BSDs does not support any fast system call mechanism in 32-bit mode so add to bsd-user the same stub that FreeBSD has for 64-bit compatibility mode. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-06-26target/i386: implement RDPID in TCGPaolo Bonzini
RDPID corresponds to a RDMSR(TSC_AUX); however, it is unprivileged so for user-mode emulation we must provide the value that the kernel places in the MSR. For Linux, it is a combination of the current CPU and the current NUMA node, both of which can be retrieved with getcpu(2). Also try sched_getcpu(), which might be there on the BSDs. If there is no portable way to retrieve the current CPU id from userspace, return 0. RDTSCP is reimplemented as RDTSC + RDPID ECX; the differences in terms of serializability are not relevant to QEMU. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-06-26target/i386: sysret and sysexit are privilegedPaolo Bonzini
Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-06-26target/i386: AMD only supports SYSENTER/SYSEXIT in 32-bit modePaolo Bonzini
Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-06-26target/i386: Intel only supports SYSCALL/SYSRET in long modePaolo Bonzini
Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-06-26target/i386: TCG supports WBNOINVDPaolo Bonzini
WBNOINVD is the same as INVD or WBINVD as far as TCG is concerned, since there is no cache in TCG and therefore no invalidation side effect in WBNOINVD. With respect to SVM emulation, processors that do not support WBNOINVD will ignore the prefix and treat it as WBINVD, while those that support it will generate exactly the same vmexit. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-06-26target/i386: TCG supports XSAVEERPTRPaolo Bonzini
XSAVEERPTR is actually a fix for an errata; TCG does not have the issue. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-06-26target/i386: do not accept RDSEED if CPUID bit absentPaolo Bonzini
Suggested-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-06-26target/i386: TCG supports RDSEEDPaolo Bonzini
TCG implements RDSEED, and in fact uses qcrypto_random_bytes which is secure enough to match hardware behavior. Expose it to guests. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-06-26target/i386: TCG supports 3DNow! prefetch(w)Paolo Bonzini
The AMD prefetch(w) instructions have not been deprecated together with the rest of 3DNow!, and in fact are even supported by newer Intel processor. Mark them as supported by TCG, as it supports all of 3DNow!. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-06-26target/i386: fix INVD vmexitPaolo Bonzini
Due to a typo or perhaps a brain fart, the INVD vmexit was never generated. Fix it (but not that fixing just the typo would break both INVD and WBINVD, due to a case of two wrongs making a right). Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-06-25target/ppc: Add msgsnd/p and DPDES SMT supportNicholas Piggin
Doorbells in SMT need to coordinate msgsnd/msgclr and DPDES access from multiple threads that affect the same state. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Cédric Le Goater <clg@kaod.org> Signed-off-by: Cédric Le Goater <clg@kaod.org>
2023-06-25target/ppc: Add support for SMT CTRL registerNicholas Piggin
A relatively simple case to begin with, CTRL is a SMT shared register where reads and writes need to synchronise against state changes by other threads in the core. Atomic serialisation operations are used to achieve this. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Cédric Le Goater <clg@kaod.org> Signed-off-by: Cédric Le Goater <clg@kaod.org>
2023-06-25target/ppc: Add initial flags and helpers for SMT supportNicholas Piggin
TGC SMT emulation needs to know whether it is running with SMT siblings, to be able to iterate over siblings in a core, and to serialise threads to access per-core shared SPRs. Add infrastructure to do these things. For now the sibling iteration and serialisation are implemented in a simple but inefficient way. SMT shared state and sibling access is not too common, and SMT configurations are mainly useful to test system code, so performance is not to critical. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Cédric Le Goater <clg@kaod.org> [ clg: fix build breakage with clang ] Signed-off-by: Cédric Le Goater <clg@kaod.org>
2023-06-25target/ppc: Fix sc instruction handling of LEV fieldNicholas Piggin
The top bits of the LEV field of the sc instruction are to be treated as as a reserved field rather than a reserved value, meaning LEV is effectively the bottom bit. LEV=0xF should be treated as LEV=1 and be a hypercall, for example. This changes the instruction execution to just set lev from the low bit of the field. Processors which don't support the LEV field will continue to ignore it. ISA v3.1 defines LEV to be 2 bits, in order to add the 'sc 2' ultracall instruction. TCG does not support Ultravisor, so don't worry about that bit. Suggested-by: "Harsh Prateek Bora" <harshpb@linux.ibm.com> Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com> Signed-off-by: Cédric Le Goater <clg@kaod.org>
2023-06-25target/ppc: Better CTRL SPR implementationNicholas Piggin
The CTRL register is able to write the bit in the RUN field, which gets reflected into the TS field which is read-only and contains the state of the RUN field for all threads in the core. TCG does not implement SMT, so the correct implementation just requires mirroring the RUN bit into the first bit of the TS field. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Cédric Le Goater <clg@kaod.org>
2023-06-25target/ppc: Add ISA v3.1 LEV indication in SRR1 for system call interruptsNicholas Piggin
System call interrupts in ISA v3.1 CPUs add a LEV indication in SRR1 that corresponds with the LEV field of the instruction that caused the interrupt. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com> Signed-off-by: Cédric Le Goater <clg@kaod.org>
2023-06-25target/ppc: Implement HEIR SPRNicholas Piggin
The hypervisor emulation assistance interrupt modifies HEIR to contain the value of the instruction which caused the exception. Only TCG raises HEAI interrupts so this can be made TCG-only. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Cédric Le Goater <clg@kaod.org>
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