- Nov 24, 2022
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Nicholas Miehlbradt authored
Add POWER9 and POWER10 to CPU families and list Radix MMU. Signed-off-by:
Nicholas Miehlbradt <nicholas@linux.ibm.com> Reviewed-by:
Andrew Donnellan <ajd@linux.ibm.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220810040321.375396-1-nicholas@linux.ibm.com
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- Sep 28, 2022
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Nicholas Piggin authored
Update the 64s GENERIC_CPU option. POWER4 support has been dropped, so make that clear in the option name. The POWER5_CPU option is dropped because it's uncommon, and GENERIC_CPU covers it. -mtune= before power8 is dropped because the minimum gcc version supports power8, and tuning is made consistent between big and little endian. A 970 option is added for PowerPC 970 / G5 because they still have a user base, and -mtune=power8 does not generate good code for the 970. This also updates the ISA versions document to add Power4/Power4+ because I didn't realise Power4+ used 2.01. Signed-off-by:
Nicholas Piggin <npiggin@gmail.com> Reviewed-by:
Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by:
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- Aug 26, 2022
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Michael Ellerman authored
Add the NXP (nee Freescale) e5500 and e6500 to the ISA versions documentation. Signed-off-by:
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- Jul 28, 2022
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Bagas Sanjaya authored
elf_hwcaps documentation is missing from table of contents at index.rst, hence triggers Sphinx warning: Documentation/powerpc/elf_hwcaps.rst: WARNING: document isn't included in any toctree Add the documentation to the index to fix the warning. Fixes: 3df1ff42e69e91 ("powerpc: add documentation for HWCAPs") Reported-by:Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
Bagas Sanjaya <bagasdotme@gmail.com> Signed-off-by:
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Bagas Sanjaya authored
Sphinx reported duplicate label warning: WARNING: duplicate label elf_hwcaps_index, other instance in Documentation/arm64/elf_hwcaps.rst The warning is caused by elf_hwcaps_index label name is already used for arm64 documentation, whileas powerpc use the same name. Disambiguate the label name for powerpc. Fixes: 3df1ff42e69e91 ("powerpc: add documentation for HWCAPs") Reported-by: -
Bagas Sanjaya authored
Sphinx reported unexpected indentation warnings: Documentation/powerpc/elf_hwcaps.rst:82: WARNING: Unexpected indentation. Documentation/powerpc/elf_hwcaps.rst:100: WARNING: Unexpected indentation. Documentation/powerpc/elf_hwcaps.rst:117: WARNING: Unexpected indentation. Documentation/powerpc/elf_hwcaps.rst:122: WARNING: Unexpected indentation. Documentation/powerpc/elf_hwcaps.rst:144: WARNING: Unexpected indentation. Fix these warnings by unindenting commit references and using literal code block for instructions list for PPC_FEATURE_ICACHE_SNOOP. Fixes: 3df1ff42e69e91 ("powerpc: add documentation for HWCAPs") Reported-by:
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- Jul 27, 2022
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Nicholas Piggin authored
Take the arm64 HWCAP documentation file and adjust it for powerpc. Signed-off-by:
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- May 22, 2022
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Reza Arbab authored
The hardware bug in POWER9 preventing use of the DAWR was fixed in DD2.3. Set the CPU_FTR_DAWR feature bit on these newer systems to start using it again, and update the documentation accordingly. The CPU features for DD2.3 are currently determined by "DD2.2 or later" logic. In adding DD2.3 as a discrete case for the first time here, I'm carrying the quirks of DD2.2 forward to keep all behavior outside of this DAWR change the same. This leaves the assessment and potential removal of those quirks on DD2.3 for later. Signed-off-by:
Reza Arbab <arbab@linux.ibm.com> Signed-off-by:
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Daniel Axtens authored
Implement a limited form of KASAN for Book3S 64-bit machines running under the Radix MMU, supporting only outline mode. - Enable the compiler instrumentation to check addresses and maintain the shadow region. (This is the guts of KASAN which we can easily reuse.) - Require kasan-vmalloc support to handle modules and anything else in vmalloc space. - KASAN needs to be able to validate all pointer accesses, but we can't instrument all kernel addresses - only linear map and vmalloc. On boot, set up a single page of read-only shadow that marks all iomap and vmemmap accesses as valid. - Document KASAN in powerpc docs. Background ---------- KASAN support on Book3S is a bit tricky to get right: - It would be good to support inline instrumentation so as to be able to catch stack issues that cannot be caught with outline mode. - Inline instrumentation requires a fixed offset. - Book3S runs code with translations off ("real mode") during boot, including a lot of generic device-tree parsing code which is used to determine MMU features. [ppc64 mm note: The kernel installs a linear mapping at effective address c000...-c008.... This is a one-to-one mapping with physical memory from 0000... onward. Because of how memory accesses work on powerpc 64-bit Book3S, a kernel pointer in the linear map accesses the same memory both with translations on (accessing as an 'effective address'), and with translations off (accessing as a 'real address'). This works in both guests and the hypervisor. For more details, see s5.7 of Book III of version 3 of the ISA, in particular the Storage Control Overview, s5.7.3, and s5.7.5 - noting that this KASAN implementation currently only supports Radix.] - Some code - most notably a lot of KVM code - also runs with translations off after boot. - Therefore any offset has to point to memory that is valid with translations on or off. One approach is just to give up on inline instrumentation. This way boot-time checks can be delayed until after the MMU is set is up, and we can just not instrument any code that runs with translations off after booting. Take this approach for now and require outline instrumentation. Previous attempts allowed inline instrumentation. However, they came with some unfortunate restrictions: only physically contiguous memory could be used and it had to be specified at compile time. Maybe we can do better in the future. [paulus@ozlabs.org - Rebased onto 5.17. Note that a kernel with CONFIG_KASAN=y will crash during boot on a machine using HPT translation because not all the entry points to the generic KASAN code are protected with a call to kasan_arch_is_ready().] Originally-by: Balbir Singh <bsingharora@gmail.com> # ppc64 out-of-line radix version Signed-off-by:Daniel Axtens <dja@axtens.net> Signed-off-by:
Paul Mackerras <paulus@ozlabs.org> [mpe: Update copyright year and comment formatting] Signed-off-by:
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Daniel Axtens authored
KASAN is supported on 32-bit powerpc and the docs should reflect this. Suggested-by:
Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by:
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- Aug 26, 2021
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Aneesh Kumar K.V authored
Fix make htmldocs related errors with the newly added associativity.rst doc file. Reported-by:
Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by:
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- Aug 13, 2021
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Aneesh Kumar K.V authored
PAPR interface currently supports two different ways of communicating resource grouping details to the OS. These are referred to as Form 0 and Form 1 associativity grouping. Form 0 is the older format and is now considered deprecated. This patch adds another resource grouping named FORM2. Signed-off-by:
Daniel Henrique Barboza <danielhb413@gmail.com> Signed-off-by:
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- May 20, 2021
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Nicholas Piggin authored
powerpc/64s/syscall: Use pt_regs.trap to distinguish syscall ABI difference between sc and scv syscalls The sc and scv 0 system calls have different ABI conventions, and ptracers need to know which system call type is being used if they want to look at the syscall registers. Document that pt_regs.trap can be used for this, and fix one in-tree user to work with scv 0 syscalls. Fixes: 7fa95f9a ("powerpc/64s: system call support for scv/rfscv instructions") Cc: stable@vger.kernel.org # v5.9+ Reported-by:
"Dmitry V. Levin" <ldv@altlinux.org> Suggested-by:
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- Apr 20, 2021
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Haren Myneni authored
The links that are mentioned in this document are no longer valid. So changed the proper links for NXGZIP user manual and test cases. Reported-by:
Bulent Abali <abali@us.ibm.com> Signed-off-by:
Haren Myneni <haren@linux.ibm.com> Signed-off-by:
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- Apr 14, 2021
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Shivaprasad G Bhat authored
Add support for ND_REGION_ASYNC capability if the device tree indicates 'ibm,hcall-flush-required' property in the NVDIMM node. Flush is done by issuing H_SCM_FLUSH hcall to the hypervisor. If the flush request failed, the hypervisor is expected to to reflect the problem in the subsequent nvdimm H_SCM_HEALTH call. This patch prevents mmap of namespaces with MAP_SYNC flag if the nvdimm requires an explicit flush[1]. References: [1] https://github.com/avocado-framework-tests/avocado-misc-tests/blob/master/memory/ndctl.py.data/map_sync.c Signed-off-by:
Shivaprasad G Bhat <sbhat@linux.ibm.com> Reviewed-by:
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- Mar 31, 2021
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He Ying authored
Reported-by:
Hulk Robot <hulkci@huawei.com> Signed-off-by:
He Ying <heying24@huawei.com> Acked-by:
Jonathan Corbet <corbet@lwn.net>
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- Mar 25, 2021
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Bhaskar Chowdhury authored
s/struture/structure/ Signed-off-by:
Bhaskar Chowdhury <unixbhaskar@gmail.com> Acked-by:
Randy Dunlap <rdunlap@infradead.org> Link: https://lore.kernel.org/r/20210322062237.2971314-1-unixbhaskar@gmail.com Signed-off-by:
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- Feb 25, 2021
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Andrew Donnellan authored
Commit 209b44c8 ("docs: powerpc: syscall64-abi.rst: fix a malformed table") attempted to fix the formatting of tables in syscall64-abi.rst, but inadvertently changed some register names. Redo the tables with the correct register names, and while we're here, clean things up to separate the registers into different rows and add headings. Fixes: 209b44c8 ("docs: powerpc: syscall64-abi.rst: fix a malformed table") Signed-off-by:
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- Dec 03, 2020
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Mauro Carvalho Chehab authored
Add a feature list matrix for each architecture to their respective Kernel books. Signed-off-by:
Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/9c39d4dd93e05c0008205527d2c3450912f029ed.1606748711.git.mchehab+huawei@kernel.org Signed-off-by:
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- Oct 15, 2020
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Mauro Carvalho Chehab authored
As reported: Documentation/powerpc/syscall64-abi.rst:53: WARNING: Malformed table. Text in column margin in table line 2. =========== ============= ======================================== --- For the sc instruction, differences with the ELF ABI --- r0 Volatile (System call number.) This table requires a different notation to be valid. Signed-off-by:
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- Oct 13, 2020
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Rob Herring authoredbooting-without-of.rst is an ancient document that first outlined Flattened DeviceTree on PowerPC initially. The DT world has evolved a lot in the 15 years since and booting-without-of.rst is pretty stale. The name of the document itself is confusing if you don't understand the evolution from real 'OpenFirmware'. Most of what booting-without-of.rst contains is now in the DT specification (which evolved out of the ePAPR). The few things that weren't documented in the DT specification are now. All that remains is the boot entry details, so let's move these to arch specific documents. The exception is arm which already has the same details documented. Cc: Frank Rowand <frowand.list@gmail.com> Cc: Mauro Carvalho Chehab <mchehab@kernel.org> Cc: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-mips@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-sh@vger.kernel.org Acked-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by:
Borislav Petkov <bp@suse.de> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Signed-off-by:
Rob Herring <robh@kernel.org>
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- Sep 15, 2020
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Ravi Bangoria authored
PPC_DEBUG_FEATURE_DATA_BP_ARCH_31 can be used to determine whether we are running on an ISA 3.1 compliant machine. Which is needed to determine DAR behaviour, 512 byte boundary limit etc. This was requested by Pedro Miraglia Franco de Carvalho for extending watchpoint features in gdb. Note that availability of 2nd DAWR is independent of this flag and should be checked using ppc_debug_info->num_data_bps. Signed-off-by:
Ravi Bangoria <ravi.bangoria@linux.ibm.com> Signed-off-by:
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- Sep 08, 2020
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Jordan Niethe authored
Update the CPU to ISA Version Mapping document to include Power10 and ISA v3.1. Signed-off-by:
Jordan Niethe <jniethe5@gmail.com> [mpe: Make sure ISA reference is unique] Signed-off-by:
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- Aug 27, 2020
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Randy Dunlap authored
Fix malformed table warning in powerpc/syscall64-abi.rst by making two tables and moving the headings. Documentation/powerpc/syscall64-abi.rst:53: WARNING: Malformed table. Text in column margin in table line 2. =========== ============= ======================================== --- For the sc instruction, differences with the ELF ABI --- r0 Volatile (System call number.) r3 Volatile (Parameter 1, and return value.) r4-r8 Volatile (Parameters 2-6.) cr0 Volatile (cr0.SO is the return error condition.) cr1, cr5-7 Nonvolatile lr Nonvolatile --- For the scv 0 instruction, differences with the ELF ABI --- r0 Volatile (System call number.) r3 Volatile (Parameter 1, and return value.) r4-r8 Volatile (Parameters 2-6.) =========== ============= ======================================== Fixes: 7fa95f9a ("powerpc/64s: system call support for scv/rfscv instructions") Signed-off-by:
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- Jul 28, 2020
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Ram Pai authored
The Ultravisor is expected to explicitly call H_SVM_PAGE_IN for all the pages of the SVM before calling H_SVM_INIT_DONE. This causes a huge delay in tranistioning the VM to SVM. The Ultravisor is only interested in the pages that contain the kernel, initrd and other important data structures. The rest contain throw-away content. However if not all pages are requested by the Ultravisor, the Hypervisor continues to consider the GFNs corresponding to the non-requested pages as normal GFNs. This can lead to data-corruption and undefined behavior. In H_SVM_INIT_DONE handler, move all the PFNs associated with the SVM's GFNs to secure-PFNs. Skip the GFNs that are already Paged-in or Shared or Paged-in followed by a Paged-out. Reviewed-by:
Bharata B Rao <bharata@linux.ibm.com> Signed-off-by:
Ram Pai <linuxram@us.ibm.com> Signed-off-by:
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Ram Pai authored
Page-merging of pages in memory-slots associated with a Secure VM is disabled in H_SVM_PAGE_IN handler. This operation should have been done the much earlier; the moment the VM is initiated for secure-transition. Delaying this operation increases the probability for those pages to acquire new references, making it impossible to migrate those pages in H_SVM_PAGE_IN handler. Disable page-migration in H_SVM_INIT_START handling. Reviewed-by:
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- Jul 22, 2020
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Nicholas Piggin authored
Add support for the scv instruction on POWER9 and later CPUs. For now this implements the zeroth scv vector 'scv 0', as identical to 'sc' system calls, with the exception that LR is not preserved, nor are volatile CR registers, and error is not indicated with CR0[SO], but by returning a negative errno. rfscv is implemented to return from scv type system calls. It can not be used to return from sc system calls because those are defined to preserve LR. getpid syscall throughput on POWER9 is improved by 26% (428 to 318 cycles), largely due to reducing mtmsr and mtspr. Signed-off-by:
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- Jul 21, 2020
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Alexander A. Klimov authored
Rationale: Reduces attack surface on kernel devs opening the links for MITM as HTTPS traffic is much harder to manipulate. Deterministic algorithm: For each file: If not .svg: For each line: If doesn't contain `\bxmlns\b`: For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`: If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`: If both the HTTP and HTTPS versions return 200 OK and serve the same content: Replace HTTP with HTTPS. Signed-off-by:Alexander A. Klimov <grandmaster@al2klimov.de> Signed-off-by:
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- Jul 15, 2020
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Haren Myneni authored
P9 DD2 NX workbook (Table 4-36) says DMA controller uses CC=5 internally for translation fault handling. NX reserves CC=250 for OS to notify user space when NX encounters address translation failure on the request buffer. Not an issue in earlier releases as NX does not get faults on kernel addresses. This patch defines CSB_CC_FAULT_ADDRESS(250) and updates CSB.CC with this proper error code for user space. Fixes: c96c4436 ("powerpc/vas: Update CSB and notify process for fault CRBs") Signed-off-by:
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Christophe Leroy authored
Documentation wrongly tells that book3s/32 CPU have hash MMU. 603 and e300 core only have software loaded TLB. 755, 7450 family and e600 core have both hash MMU and software loaded TLB. This can be selected by setting a bit in HID2 (755) or HID0 (others). At the time being this is not supported by the kernel. Make this explicit in the documentation. Signed-off-by:
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- Jul 13, 2020
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Randy Dunlap authored
Drop the doubled word "the". Signed-off-by:
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- Jun 26, 2020
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Mauro Carvalho Chehab authored
There are a few issues on this document, when built via the building with ``make htmldocs``: Documentation/powerpc/vas-api.rst:116: WARNING: Unexpected indentation. Documentation/powerpc/vas-api.rst:116: WARNING: Inline emphasis start-string without end-string. Documentation/powerpc/vas-api.rst:117: WARNING: Block quote ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:117: WARNING: Inline emphasis start-string without end-string. Documentation/powerpc/vas-api.rst:120: WARNING: Definition list ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:124: WARNING: Unexpected indentation. Documentation/powerpc/vas-api.rst:133: WARNING: Unexpected indentation. Documentation/powerpc/vas-api.rst:135: WARNING: Unexpected indentation. Documentation/powerpc/vas-api.rst:150: WARNING: Unexpected indentation. Documentation/powerpc/vas-api.rst:151: WARNING: Block quote ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:161: WARNING: Unexpected indentation. Documentation/powerpc/vas-api.rst:176: WARNING: Definition list ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:253: WARNING: Unexpected indentation. Documentation/powerpc/vas-api.rst:253: WARNING: Inline emphasis start-string without end-string. Documentation/powerpc/vas-api.rst:259: WARNING: Unexpected indentation. Documentation/powerpc/vas-api.rst:261: WARNING: Block quote ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:266: WARNING: Unexpected indentation. Documentation/powerpc/vas-api.rst:267: WARNING: Block quote ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:270: WARNING: Definition list ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:271: WARNING: Definition list ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:273: WARNING: Unexpected indentation. Documentation/powerpc/vas-api.rst:274: WARNING: Block quote ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:277: WARNING: Definition list ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:278: WARNING: Definition list ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:280: WARNING: Unexpected indentation. Documentation/powerpc/vas-api.rst:287: WARNING: Block quote ends without a blank line; unexpected unindent. Documentation/powerpc/vas-api.rst:289: WARNING: Block quote ends without a blank line; unexpected unindent. Fixes: c12e38b1 ("Documentation/powerpc: VAS API") Signed-off-by:
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- Jun 19, 2020
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Mauro Carvalho Chehab authored
- Add a SPDX header; - Use standard markup for document title; - Adjust identation on lists and add blank lines where needed; - Add it to the powerpc index.rst file. Acked-by: Michael Ellerman <mpe@ellerman.id.au> # powerpc Signed-off-by:
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- Jun 16, 2020
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Vaibhav Jain authored
Add documentation to 'papr_hcalls.rst' describing the bitmap flags that are returned from H_SCM_HEALTH hcall as per the PAPR-SCM specification. Signed-off-by:
Vaibhav Jain <vaibhav@linux.ibm.com> Acked-by:
Ira Weiny <ira.weiny@intel.com> Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Ira Weiny <ira.weiny@intel.com> Link: https://lore.kernel.org/r/20200615124407.32596-2-vaibhav@linux.ibm.com Signed-off-by:
Dan Williams <dan.j.williams@intel.com>
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- May 28, 2020
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Michal Simek authored
The latest Xilinx design tools called ISE and EDK has been released in October 2013. New tool doesn't support any PPC405/PPC440 new designs. These platforms are no longer supported and tested. PowerPC 405/440 port is orphan from 2013 by commit cdeb8994 ("MAINTAINERS: Fix incorrect status tag") and commit 19624236 ("MAINTAINERS: Update Grant's email address and maintainership") that's why it is time to remove the support fot these platforms. Signed-off-by:
Michal Simek <michal.simek@xilinx.com> Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
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- May 20, 2020
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Michael Neuling authored
The ISA has a quirk that's useful for the Linux implementation. Document it here so others are less likely to trip over it. Suggested-by:
Michael Neuling <mikey@neuling.org> Signed-off-by:
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- Apr 20, 2020
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Mauro Carvalho Chehab authored
The User API chapter contains two sub-chapters. Mark them as such. Signed-off-by:
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Mauro Carvalho Chehab authored
Some filesystem references got broken by a previous patch series I submitted. Address those. Signed-off-by:
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Haren Myneni authored
Power9 introduced Virtual Accelerator Switchboard (VAS) which allows userspace to communicate with Nest Accelerator (NX) directly. But kernel has to establish channel to NX for userspace. This document describes user space API that application can use to establish communication channel. Signed-off-by:
Sukadev Bhattiprolu <sukadev@linux.ibm.com> Signed-off-by:
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- Mar 20, 2020
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Mauro Carvalho Chehab authored
Changeset 58ad30cf ("docs: fix reference to core-api/namespaces.rst") enabled a new feature at Sphinx: it will now generate index for each document title, plus to each chapter inside it. There's a drawback, though: one document cannot have two sections with the same name anymore. A followup patch will change the logic of autosectionlabel to avoid most creating references for every single section title, but still we need to be able to reference the chapters inside a document. There are a few places where there are two chapters with the same name. This patch renames one of the chapters, in order to avoid symbol conflict within the same document. PS.: as I don't speach Chinese, I had some help from a friend (Wen Liu) at the Chinese translation for "publishing patches" for this document: Documentation/translations/zh_CN/process/5.Posting.rst Fixes: 58ad30cf ("docs: fix reference to core-api/namespaces.rst") Signed-off-by:
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