- 17 Jul, 2024 1 commit
-
-
Gerald Schaefer authored
There is no support for HWPOISON, MEMORY_FAILURE, or ARCH_HAS_COPY_MC on s390. Therefore we do not expect to see VM_FAULT_HWPOISON in do_exception(). However, since commit af19487f ("mm: make PTE_MARKER_SWAPIN_ERROR more general"), it is possible to see VM_FAULT_HWPOISON in combination with PTE_MARKER_POISONED, even on architectures that do not support HWPOISON otherwise. In this case, we will end up on the BUG() in do_exception(). Fix this by treating VM_FAULT_HWPOISON the same as VM_FAULT_SIGBUS, similar to x86 when MEMORY_FAILURE is not configured. Also print unexpected fault flags, for easier debugging. Note that VM_FAULT_HWPOISON_LARGE is not expected, because s390 cannot support swap entries on other levels than PTE level. Cc: stable@vger.kernel.org # 6.6+ Fixes: af19487f ("mm: make PTE_MARKER_SWAPIN_ERROR more general") Reported-by:
Yunseong Kim <yskelg@gmail.com> Tested-by:
Alexander Gordeev <agordeev@linux.ibm.com> Signed-off-by:
Gerald Schaefer <gerald.schaefer@linux.ibm.com> Message-ID: <20240715180416.3632453-1-gerald.schaefer@linux.ibm.com> Signed-off-by:
Vasily Gorbik <gor@linux.ibm.com>
-
- 10 Jul, 2024 13 commits
-
-
Claudio Imbrenda authored
Move and improve the struct definitions for DAT tables from gaccess.c to a new header. Once in a separate header, the structs become available everywhere. One possible usecase is to merge them in the s390 pte_t and p?d_t definitions, which is left as an exercise for the reader. Signed-off-by:
Claudio Imbrenda <imbrenda@linux.ibm.com> Reviewed-by:
Nico Boehr <nrb@linux.ibm.com> Link: https://lore.kernel.org/r/20240703155900.103783-3-imbrenda@linux.ibm.comSigned-off-by:
Heiko Carstens <hca@linux.ibm.com> Signed-off-by:
-
Claudio Imbrenda authored
Pass the guest ASCE explicitly as parameter, instead of having sie64a() take it from lowcore. This removes hidden state from lowcore, and makes things look cleaner. Signed-off-by:
-
Mete Durlu authored
When sthyi is being emulated, data from diag204 is used. If diag204 returns busy, previously cached sthyi info block is returned to the caller and cache expiry is set to expired. Acked-by:
Tobias Huschle <huschle@linux.ibm.com> Signed-off-by:
Mete Durlu <meted@linux.ibm.com> Signed-off-by:
-
Mete Durlu authored
Move diag204 related operations to their own functions for better error handling and better readability. Acked-by:
-
Mete Durlu authored
When diag204 busy-indiciation facility is installed and diag204 is returning busy, hypfs diag204 handler now does an interruptable busy wait until diag204 is no longer busy. If there is a signal pending, call would be restarted with -ERESTARTSYSCALL, except for fatal signals. Acked-by:
-
Mete Durlu authored
To verify if busy indication facility is installed or not sclp bits has to be checked. Add a function that checks sclp to improve readability. Add busy-indication-request bit mask for diag204 subcodes. Acked-by:
-
Mete Durlu authored
When diag204-busy-indication facility is installed, diag204 can return '8' which means device is busy and no operation is done. Add check for return codes of diag204 call. Return error codes according to diag204 return codes. Acked-by:
-
Mete Durlu authored
Return different errno's from diag204 to allow users to handle them accordingly. Instead of returning -1 regardless of the failing condition, return -EINVAL on invalid memory address and -EOPNOTSUPP when diag instruction fails. Acked-by:
-
Mete Durlu authored
Detect diag204 busy indication facility. Acked-by:
-
Heiko Carstens authored
With gcc 14.1.0 support for flag output constraint was added for s390. Use this for __atomic_cmpxchg_bool(). This allows for slightly better code, since the compiler can generate code depending on the condition code which is the result of an inline assembly. The size of the kernel image is reduced by ~12kb. Reviewed-by:
Juergen Christ <jchrist@linux.ibm.com> Signed-off-by:
-
Heiko Carstens authored
Use mvhi/mvghi for small constant values within the __atomic_set() inline assemblies. This avoids loading the specified value into a register. The size of the kernel image is reduced by ~1.2kb. Reviewed-by:
-
Heiko Carstens authored
Consistently use symbolic names in all atomic ops inline assemblies. Reviewed-by:
-
Sven Schnelle authored
Instead of setting up non-boot CPUs early in architecture code, only setup the cpu present mask and let the generic code handle cpu bringup. Signed-off-by:
Sven Schnelle <svens@linux.ibm.com> Signed-off-by:
-
- 02 Jul, 2024 3 commits
-
-
Heiko Carstens authored
Describe that some HWCAP bits are reserved to avoid that they will be used by accident. Suggested-by:
Stefan Liebler <stli@linux.ibm.com> Reviewed-by:
-
Claudio Imbrenda authored
Make the crdte() and cspg() wrappers return a boolean to indicate success, like the other already existing "compare and swap" type of wrappers. Add documentation for those functions as well. Acked-by:
-
Mete Durlu authored
s390 generates KOBJ_CHANGE uevents on CPUs whenever a topology update occurs. These uevents currently have no users and they are also not present on other architectures. As they are not necessary, remove these extra uevents. Suggested-by:
-
- 01 Jul, 2024 3 commits
-
-
Peter Oberparleiter authored
Due to a bug in some firmware versions, Store Data requests might not get an event response in certain situations. As a result, the boot process will be blocked indefinitely. Fix this by introducing timeout handling for Store Data requests. In case a timeout occurs, the Store Data operation is halted and no data is retrieved from the SCLP facility. Note: A minority of installed systems rely on Store Data result for device auto-configuration. These systems will fail to boot in case of a Store Data timeout and will need to be switched to manual device configuration as workaround. Reviewed-by:
Peter Oberparleiter <oberpar@linux.ibm.com> Signed-off-by:
-
Peter Oberparleiter authored
When a task waiting for completion of a Store Data operation is interrupted, an attempt is made to halt this operation. If this attempt fails due to a hardware or firmware problem, there is a chance that the SCLP facility might store data into buffers referenced by the original operation at a later time. Handle this situation by not releasing the referenced data buffers if the halt attempt fails. For current use cases, this might result in a leak of few pages of memory in case of a rare hardware/firmware malfunction. Reviewed-by:
-
Peter Oberparleiter authored
On systems that do not support Store Data events (such as when running as KVM guest) the following warning message appears during boot: sclp_sd: Store Data request failed (eq=2, di=3, response=0x40f0, flags=0x00, status=0, rc=-5) This warning does not add any useful information since the result is expected due to missing support for that event type. Suppress this message by checking the associated masks of supported events before issuing a Store Data event. Suggested-by:
-
- 28 Jun, 2024 5 commits
-
-
Jeff Johnson authored
With ARCH=s390, make allmodconfig && make W=1 C=1 reports: WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/s390/char/raw3270.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/s390/char/con3270.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/s390/char/fs3270.o Add the missing invocations of the MODULE_DESCRIPTION() macro. Acked-by:
Jeff Johnson <quic_jjohnson@quicinc.com> Link: https://lore.kernel.org/r/20240615-md-s390-drivers-s390-char-v1-1-d1cd23ff6476@quicinc.comSigned-off-by:
-
Jeff Johnson authored
With ARCH=s390, make allmodconfig && make W=1 C=1 reports: WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/s390/block/dcssblk.o Add the missing invocation of the MODULE_DESCRIPTION() macro. Acked-by:
-
Jeff Johnson authored
With ARCH=s390, make allmodconfig && make W=1 C=1 reports: WARNING: modpost: missing MODULE_DESCRIPTION() in arch/s390/mm/cmm.o Add the missing invocation of the MODULE_DESCRIPTION() macro. Acked-by:
-
Jeff Johnson authored
With ARCH=s390, make allmodconfig && make W=1 C=1 reports: WARNING: modpost: missing MODULE_DESCRIPTION() in arch/s390/lib/test_kprobes_s390.o WARNING: modpost: missing MODULE_DESCRIPTION() in arch/s390/lib/test_unwind.o WARNING: modpost: missing MODULE_DESCRIPTION() in arch/s390/lib/test_modules.o Add the missing invocations of the MODULE_DESCRIPTION() macro. Acked-by:
-
Jeff Johnson authored
With ARCH=s390, make allmodconfig && make W=1 C=1 reports: WARNING: modpost: missing MODULE_DESCRIPTION() in arch/s390/crypto/crc32-vx_s390.o Add the missing invocation of the MODULE_DESCRIPTION() macro. Acked-by:
-
- 24 Jun, 2024 2 commits
-
-
Wei Yang authored
On s390, zero page's size relies on total ram pages. Since we plan to move the accounting into __free_pages_core(), totalram_pages may not represent the total usable pages on system at this point when defer_init is enabled. We can get the total usable pages from memblock directly. The size maybe not accurate due to the alignment, but enough for the calculation. Signed-off-by:
Wei Yang <richard.weiyang@gmail.com> CC: Mike Rapoport (IBM) <rppt@kernel.org> CC: David Hildenbrand <david@redhat.com> Reviewed-by:
David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20240616013537.20338-1-richard.weiyang@gmail.comSigned-off-by:
-
Heiko Carstens authored
Make use of the popcnt instruction to provide optimized __arch_hweight*() implementations. The generated code is shorter and avoids rather expensive functions calls. Acked-by:
-
- 18 Jun, 2024 11 commits
-
-
Alexander Gordeev authored
Replace immediate values with SCLP_CMDW_UN|ASSIGN_STORAGE defines. Acked-by:
-
Sven Schnelle authored
With all users gone, remove S390_lowcore. Acked-by:
-
Sven Schnelle authored
Assign the output from get_lowcore() to a local variable, so the code is easier to read. Acked-by:
-
Sven Schnelle authored
Assign the output from get_lowcore() to a local variable, so the code is easier to read. Acked-by:
-
Sven Schnelle authored
Assign the output from get_lowcore() to a local variable, so the code is easier to read. Acked-by:
-
Sven Schnelle authored
Assign the output from get_lowcore() to a local variable, so the code is easier to read. Acked-by:
-
Sven Schnelle authored
Assign the output from get_lowcore() to a local variable, so the code is easier to read. Acked-by:
-
Sven Schnelle authored
Replace all S390_lowcore usages in arch/s390/boot by get_lowcore(). Acked-by:
-
Sven Schnelle authored
Replace all S390_lowcore usages in drivers/s390 by get_lowcore(). Acked-by:
-
Sven Schnelle authored
Replace all S390_lowcore usages in arch/s390/ by get_lowcore(). Acked-by:
-
Sven Schnelle authored
Add a get_lowcore() function which returns the address of lowcore (currently always NULL). This function will be used as a replacement of the S390_lowcore macro. Acked-by:
-
- 07 Jun, 2024 2 commits
-
-
Thomas Richter authored
The PMU for PAI NNPA counters enforces the following restriction: - No per-task context for PAI sampling event NNPA_ALL - No multiple system-wide PAI sampling event NNPA_ALL Both restrictions are removed. One or more per-task sampling events are supported. Also one or more system-wide sampling events are supported. Acked-by:
Sumanth Korikkar <sumanthk@linux.ibm.com> Signed-off-by:
Thomas Richter <tmricht@linux.ibm.com> Signed-off-by:
-
Thomas Richter authored
The PMU for PAI NNPA counters enforces the following restriction: - No per-task context for PAI NNPA counters. This restriction is removed. One or more per-task/system-wide counting events can now be active at the same time while one system wide sampling event is active. Acked-by:
-
