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2019-12-17kvm: introduce kvm_kernel_irqchip_* functionsPaolo Bonzini
The KVMState struct is opaque, so provide accessors for the fields that will be moved from current_machine to the accelerator. For now they just forward to the machine object, but this will change. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-12-17qom: add object_new_with_classPaolo Bonzini
Similar to CPU and machine classes, "-accel" class names are mangled, so we have to first get a class via accel_find and then instantiate it. Provide a new function to instantiate a class without going through object_class_get_name, and use it for CPUs and machines already. Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-12-14s390x/tcg: clear local interrupts on reset normalCornelia Huck
We neglected to clean up pending interrupts and emergency signals; fix that. Message-Id: <20191206135404.16051-1-cohuck@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com>
2019-12-14s390x/cpumodel: Fix query-cpu-definitions error API violationsMarkus Armbruster
qmp_query_cpu_definitions() passes @errp to get_max_cpu_model(), then frees any error it gets back. This effectively ignores errors. Dereferencing @errp is wrong; see the big comment in error.h. Passing @errp is also wrong, because it works only as long as @errp is neither @error_fatal nor @error_abort. Introduced in commit 38cba1f4d8 "s390x: return unavailable features via query-cpu-definitions". No caller actually passes such @errp values. Fix anyway: simply pass NULL to get_max_cpu_model(). Cc: David Hildenbrand <david@redhat.com> Cc: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com> Message-Id: <20191204093625.14836-16-armbru@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-12-14s390x/cpumodel: Fix query-cpu-model-FOO error API violationsMarkus Armbruster
cpu_model_from_info() is a helper for qmp_query_cpu_model_expansion(), qmp_query_cpu_model_comparison(), qmp_query_cpu_model_baseline(). It dereferences @errp when the visitor or the QOM setter fails. That's wrong; see the big comment in error.h. Introduced in commit 137974cea3 's390x/cpumodel: implement QMP interface "query-cpu-model-expansion"'. Its three callers have the same issue. Introduced in commit 4e82ef0502 's390x/cpumodel: implement QMP interface "query-cpu-model-comparison"' and commit f1a47d08ef 's390x/cpumodel: implement QMP interface "query-cpu-model-baseline"'. No caller actually passes null. Fix anyway: splice in a local Error *err, and error_propagate(). Cc: David Hildenbrand <david@redhat.com> Cc: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com> Message-Id: <20191204093625.14836-15-armbru@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-12-14s390x/cpumodel: Fix realize() error API violationsMarkus Armbruster
get_max_cpu_model() dereferences @errp when kvm_s390_get_host_cpu_model() fails, apply_cpu_model() dereferences it when kvm_s390_apply_cpu_model() fails, and s390_realize_cpu_model() dereferences it when get_max_cpu_model() or check_compatibility() fail. That's wrong; see the big comment in error.h. All three introduced in commit 80560137cf "s390x/cpumodel: check and apply the CPU model". No caller actually passes null. Fix anyway: splice in a local Error *err, and error_propagate(). Cc: David Hildenbrand <david@redhat.com> Cc: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com> Message-Id: <20191204093625.14836-14-armbru@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-12-14s390x/cpumodel: Fix feature property error API violationsMarkus Armbruster
s390x-cpu property setters set_feature() and set_feature_group() dereference @errp when the visitor fails. That's wrong; see the big comment in error.h. Introduced in commit 0754f60429 "s390x/cpumodel: expose features and feature groups as properties". No caller actually passes null. Fix anyway: splice in a local Error *err, and error_propagate(). Cc: David Hildenbrand <david@redhat.com> Cc: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com> Message-Id: <20191204093625.14836-13-armbru@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-12-14s390x: Fix cpu normal reset ri clearingJanosch Frank
As it turns out we need to clear the ri controls and PSW enablement bit to be architecture compliant. Signed-off-by: Janosch Frank <frankja@linux.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Message-Id: <20191203132813.2734-4-frankja@linux.ibm.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-12-14s390x: kvm: Make kvm_sclp_service_call voidJanosch Frank
It defaults to returning 0 anyway and that return value is not necessary, as 0 is also the default rc that the caller would return. While doing that we can simplify the logic a bit and return early if we inject a PGM exception. Signed-off-by: Janosch Frank <frankja@linux.ibm.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Message-Id: <20191129091713.4582-1-frankja@linux.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-12-14s390x: Beautify diag308 handlingJanosch Frank
Let's improve readability by: * Using constants for the subcodes * Moving parameter checking into a function * Removing subcode > 6 check as the default case catches that Signed-off-by: Janosch Frank <frankja@linux.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com> Message-Id: <20191127175046.4911-6-frankja@linux.ibm.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-12-14s390x: Move clear resetJanosch Frank
Let's also move the clear reset function into the reset handler. Signed-off-by: Janosch Frank <frankja@linux.ibm.com> Message-Id: <20191127175046.4911-5-frankja@linux.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-12-14s390x: Move initial resetJanosch Frank
Let's move the intial reset into the reset handler and cleanup afterwards. Signed-off-by: Janosch Frank <frankja@linux.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com> Message-Id: <20191128083723.11937-1-frankja@linux.ibm.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-12-14s390x: Move reset normal to shared reset handlerJanosch Frank
Let's start moving the cpu reset functions into a single function with a switch/case, so we can later use fallthroughs and share more code between resets. This patch introduces the reset function by renaming cpu_reset(). Signed-off-by: Janosch Frank <frankja@linux.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com> Message-Id: <20191127175046.4911-3-frankja@linux.ibm.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-10-21s390x/kvm: Set default cpu model for all machine classesDavid Hildenbrand
We have to set the default model of all machine classes, not just for the active one. Otherwise, "query-machines" will indicate the wrong CPU model ("qemu-s390x-cpu" instead of "host-s390x-cpu") as "default-cpu-type". Doing a {"execute":"query-machines"} under KVM now results in {"return": [ { "hotpluggable-cpus": true, "name": "s390-ccw-virtio-4.0", "numa-mem-supported": false, "default-cpu-type": "host-s390x-cpu", "cpu-max": 248, "deprecated": false}, { "hotpluggable-cpus": true, "name": "s390-ccw-virtio-2.7", "numa-mem-supported": false, "default-cpu-type": "host-s390x-cpu", "cpu-max": 248, "deprecated": false } ... Libvirt probes all machines via "-machine none,accel=kvm:tcg" and will currently see the wrong CPU model under KVM. Reported-by: Jiri Denemark <jdenemar@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Fixes: b6805e127c6b ("s390x: use generic cpu_model parsing") Cc: Igor Mammedov <imammedo@redhat.com> Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20191021100515.6978-1-david@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-10-21s390x/tcg: Fix VECTOR SUBTRACT WITH BORROW COMPUTE BORROW INDICATIONDavid Hildenbrand
The numbers are unsigned, the computation is wrong. "Each operand is treated as an unsigned binary integer". Let's implement as given in the PoP: "A subtraction is performed by adding the contents of the second operand with the bitwise complement of the third operand along with a borrow indication from the rightmost bit of the fourth operand." Reuse gen_accc2_i64(). Fixes: bc725e65152c ("s390x/tcg: Implement VECTOR SUBTRACT WITH BORROW COMPUTE BORROW INDICATION") Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20191021085715.3797-7-david@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-10-21s390x/tcg: Fix VECTOR SUBTRACT WITH BORROW INDICATIONDavid Hildenbrand
Testing this, there seems to be something messed up. We are dealing with unsigned numbers. "Each operand is treated as an unsigned binary integer." Let's just implement as written in the PoP: "A subtraction is performed by adding the contents of the second operand with the bitwise complement of the third operand along with a borrow indication from the rightmost bit position of the fourth operand and the result is placed in the first operand." We can reuse gen_ac2_i64(). Fixes: 48390a7c2716 ("s390x/tcg: Implement VECTOR SUBTRACT WITH BORROW INDICATION") Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20191021085715.3797-6-david@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-10-21s390x/tcg: Fix VECTOR SUBTRACT COMPUTE BORROW INDICATIONDavid Hildenbrand
Looks like my idea of what a "borrow" is was wrong. The PoP says: "If the resulting subtraction results in a carry out of bit zero, a value of one is placed in the corresponding element of the first operand; otherwise, a value of zero is placed in the corresponding element" As clarified by Richard, all we have to do is invert the result. Fixes: 1ee2d7ba72f6 ("s390x/tcg: Implement VECTOR SUBTRACT COMPUTE BORROW INDICATION") Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20191021085715.3797-5-david@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-10-21s390x/tcg: Fix VECTOR SHIFT RIGHT ARITHMETIC BY BYTEDavid Hildenbrand
We forgot to propagate the highest bit accross the high doubleword in two cases (shift >=64). Fixes: 5f724887e3dd ("s390x/tcg: Implement VECTOR SHIFT RIGHT ARITHMETIC") Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20191021085715.3797-4-david@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-10-21s390x/tcg: Fix VECTOR MULTIPLY AND ADD *David Hildenbrand
We missed that we always read a "double-wide even-odd element pair of the fourth operand". Fix it in all four variants. Fixes: 1b430aec4157 ("s390x/tcg: Implement VECTOR MULTIPLY AND ADD *") Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20191021085715.3797-3-david@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-10-21s390x/tcg: Fix VECTOR MULTIPLY LOGICAL ODDDavid Hildenbrand
We have to read from odd offsets. Fixes: 2bf3ee38f1f8 ("s390x/tcg: Implement VECTOR MULTIPLY *") Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20191021085715.3797-2-david@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-10-21s390x/mmu: Remove duplicate check for MMU_DATA_STOREDavid Hildenbrand
No need to double-check if we have a write. Found by Coverity (CID: 1406404). Fixes: 31b59419069e ("target/s390x: Return exception from mmu_translate_real") Cc: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20191017121922.18840-1-david@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-10-21s390x/cpumodel: Add missing visit_freeAndrew Jones
Beata Michalska noticed this missing visit_free() while reviewing arm's implementation of qmp_query_cpu_model_expansion(), which is modeled off this s390x implementation. Signed-off-by: Andrew Jones <drjones@redhat.com> Message-Id: <20191016145434.7007-1-drjones@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2019-10-10s390x/tcg: MVCL: Exit to main loop if requestedDavid Hildenbrand
MVCL is interruptible and we should check for interrupts and process them after writing back the variables to the registers. Let's check for any exit requests and exit to the main loop. Introduce a new helper function for that: cpu_loop_exit_requested(). When booting Fedora 30, I can see a handful of these exits and it seems to work reliable. Also, Richard explained why this works correctly even when MVCL is called via EXECUTE: (1) TB with EXECUTE runs, at address Ae - env->psw_addr stored with Ae. - helper_ex() runs, memory address Am computed from D2a(X2a,B2a) or from psw.addr+RI2. - env->ex_value stored with memory value modified by R1a (2) TB of executee runs, - env->ex_value stored with 0. - helper_mvcl() runs, using and updating R1b, R1b+1, R2b, R2b+1. (3a) helper_mvcl() completes, - TB of executee continues, psw.addr += ilen. - Next instruction is the one following EXECUTE. (3b) helper_mvcl() exits to main loop, - cpu_loop_exit_restore() unwinds psw.addr = Ae. - Next instruction is the EXECUTE itself... - goto 1. As the PoP mentiones that an interruptible instruction called via EXECUTE should avoid modifying storage/registers that are used by EXECUTE itself, it is fine to retrigger EXECUTE. Cc: Alex Bennée <alex.bennee@linaro.org> Cc: Peter Maydell <peter.maydell@linaro.org> Cc: Paolo Bonzini <pbonzini@redhat.com> Suggested-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09target/s390x: Remove ILEN_UNWINDRichard Henderson
This setting is no longer used. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20191001171614.8405-19-richard.henderson@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09target/s390x: Remove ilen argument from trigger_pgm_exceptionRichard Henderson
All but one caller passes ILEN_UNWIND, which is not stored. For the one use case in s390_cpu_tlb_fill, set int_pgm_ilen directly, simply to avoid the assert within do_program_interrupt. Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20191001171614.8405-18-richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09target/s390x: Remove ilen argument from trigger_access_exceptionRichard Henderson
The single caller passes ILEN_UNWIND; pass that along to trigger_pgm_exception directly. Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20191001171614.8405-17-richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09target/s390x: Remove ILEN_AUTORichard Henderson
This setting is no longer used. Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20191001171614.8405-16-richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09target/s390x: Rely on unwinding in s390_cpu_virt_mem_rwRichard Henderson
For TCG, we will always call s390_cpu_virt_mem_handle_exc, which will go through the unwinder to set ILEN. For KVM, we do not go through do_program_interrupt, so this argument is unused. Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20191001171614.8405-15-richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09target/s390x: Rely on unwinding in s390_cpu_tlb_fillRichard Henderson
We currently set ilen to AUTO, then overwrite that during unwinding, then overwrite that for the code access case. This can be simplified to setting ilen to our arbitrary value for the (undefined) code access case, then rely on unwinding to overwrite that with the correct value for the data access case. Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20191001171614.8405-14-richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09target/s390x: Simplify helper_lraRichard Henderson
We currently call trigger_pgm_exception to set cs->exception_index and env->int_pgm_code and then read the values back and then reset cs->exception_index so that the exception is not delivered. Instead, use the exception type that we already have directly without ever triggering an exception that must be suppressed. Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20191001171614.8405-13-richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09target/s390x: Remove fail variable from s390_cpu_tlb_fillRichard Henderson
Now that excp always contains a real exception number, we can use that instead of a separate fail variable. This allows a redundant test to be removed. Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20191001171614.8405-12-richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09target/s390x: Return exception from translate_pagesRichard Henderson
Do not raise the exception directly within translate_pages, but pass it back so that caller may do so. Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20191001171614.8405-11-richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09target/s390x: Return exception from mmu_translateRichard Henderson
Do not raise the exception directly within mmu_translate, but pass it back so that caller may do so. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20191001171614.8405-10-richard.henderson@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09target/s390x: Remove exc argument to mmu_translate_asceRichard Henderson
Now that mmu_translate_asce returns the exception instead of raising it, the argument is unused. Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20191001171614.8405-9-richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09target/s390x: Return exception from mmu_translate_realRichard Henderson
Do not raise the exception directly within mmu_translate_real, but pass it back so that caller may do so. Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20191001171614.8405-8-richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09target/s390x: Handle tec in s390_cpu_tlb_fillRichard Henderson
As a step toward moving all excption handling out of mmu_translate, copy handling of the LowCore tec value from trigger_access_exception into s390_cpu_tlb_fill. So far this new plumbing isn't used. Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20191001171614.8405-7-richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09target/s390x: Push trigger_pgm_exception lower in s390_cpu_tlb_fillRichard Henderson
Delay triggering an exception until the end, after we have determined ultimate success or failure, and also taken into account whether this is a non-faulting probe. Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20191001171614.8405-6-richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09target/s390x: Use tcg_s390_program_interrupt in TCG helpersRichard Henderson
Replace all uses of s390_program_interrupt within files that are marked CONFIG_TCG. These are necessarily tcg-only. This lets each of these users benefit from the QEMU_NORETURN attribute on tcg_s390_program_interrupt. Acked-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20191001171614.8405-5-richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09target/s390x: Remove ilen parameter from s390_program_interruptRichard Henderson
This is no longer used, and many of the existing uses -- particularly within hw/s390x -- seem questionable. Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20191001171614.8405-4-richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09target/s390x: Remove ilen parameter from tcg_s390_program_interruptRichard Henderson
Since we begin the operation with an unwind, we have the proper value of ilen immediately available. Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20191001171614.8405-3-richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09target/s390x: Add ilen to unwind dataRichard Henderson
Use ILEN_UNWIND to signal that we have in fact that cpu_restore_state will have been called by the time we arrive in do_program_interrupt. Signed-off-by: Richard Henderson <rth@twiddle.net> Message-Id: <20191001171614.8405-2-richard.henderson@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09s390x/cpumodel: Add new TCG features to QEMU cpu modelDavid Hildenbrand
We now implement a bunch of new facilities we can properly indicate. ESOP-1/ESOP-2 handling is discussed in the PoP Chafter 3-15 ("Suppression on Protection"). The "Basic suppression-on-protection (SOP) facility" is a core part of z/Architecture without a facility indication. ESOP-2 is indicated by ESOP-1 + Side-effect facility ("ESOP-2"). Besides ESOP-2, the side-effect facility is only relevant for the guarded-storage facility (we don't implement). S390_ESOP: - We indicate DAT exeptions by setting bit 61 of the TEID (TEC) to 1 and bit 60 to zero. We don't trigger ALCP exceptions yet. Also, we set bit 0-51 and bit 62/63 to the right values. S390_ACCESS_EXCEPTION_FS_INDICATION: - The TEID (TEC) properly indicates in bit 52/53 on any access if it was a fetch or a store S390_SIDE_EFFECT_ACCESS_ESOP2: - We have no side-effect accesses (esp., we don't implement the guarded-storage faciliy), we correctly set bit 64 of the TEID (TEC) to 0 (no side-effect). - ESOP2: We properly set bit 56, 60, 61 in the TEID (TEC) to indicate the type of protection. We don't trigger KCP/ALCP exceptions yet. S390_INSTRUCTION_EXEC_PROT: - The MMU properly detects and indicates the exception on instruction fetches - Protected TLB entries will never get PAGE_EXEC set. There is no need to fake the abscence of any of the facilities - without the facilities, some bits of the TEID (TEC) are simply unpredictable. As IEP was added with z14 and we currently implement a z13, add it to the MAX model instead. Acked-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09s390x/cpumodel: Prepare for changes of QEMU modelDavid Hildenbrand
Setup the 4.1 compatibility model so we can add new features to the LATEST model. Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09s390x/mmu: Implement Instruction-Execution-Protection FacilityDavid Hildenbrand
IEP support in the mmu is fairly easy. Set the right permissions for TLB entries and properly report an exception. Make sure to handle EDAT-2 by setting bit 56/60/61 of the TEID (TEC) to the right values. Let's keep s390_cpu_get_phys_page_debug() working even if IEP is active. Switch MMU_DATA_LOAD - this has no other effects any more as the ASC to be used is now fully selected outside of mmu_translate(). Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09s390x/mmu: Implement ESOP-2 and access-exception-fetch/store-indication facilityDavid Hildenbrand
We already implement ESOP-1. For ESOP-2, we only have to indicate all protection exceptions properly. Due to EDAT-1, we already indicate DAT exceptions properly. We don't trigger KCP/ALCP/IEP exceptions yet. So all we have to do is set the TEID (TEC) to the right values (bit 56, 60, 61) in case of LAP. We don't have any side-effects (e.g., no guarded-storage facility), therefore, bit 64 of the TEID (TEC) is always 0. We always have to indicate whether it is a fetch or a store for all access exceptions. This is only missing for LAP exceptions. Acked-by: Thomas Huth <thuth@redhat.com> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09s390x/mmu: Add EDAT2 translation supportDavid Hildenbrand
This only adds basic support to the DAT translation, but no EDAT2 support for TCG. E.g., the gdbstub under kvm uses this function, too, to translate virtual addresses. Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09s390x/mmu: Convert to non-recursive page table walkDavid Hildenbrand
A non-recursive implementation allows to make better use of the branch predictor, avoids function calls, and makes the implementation of new features only for a subset of region table levels easier. We can now directly compare our implementation to the KVM gaccess implementation in arch/s390/kvm/gaccess.c:guest_translate(). Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09s390x/mmu: DAT table definition overhaulDavid Hildenbrand
Let's use consistent names for the region/section/page table entries and for the macros to extract relevant parts from virtual address. Make them match the definitions in the PoP - e.g., how the relevant bits are actually called. Introduce defines for all bits declared in the PoP. This will come in handy in follow-up patches. Add a note where additional information about s390x and the used definitions can be found. Acked-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09s390x/mmu: Use TARGET_PAGE_MASK in mmu_translate_pte()David Hildenbrand
While ASCE_ORIGIN is not wrong, it is certainly confusing. We want a page frame address. Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09s390x/mmu: Inject PGM_ADDRESSING on bogus table addressesDavid Hildenbrand
Let's document how it works and inject PGM_ADDRESSING if reading of table entries fails. Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com>
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