- 30 Nov, 2022 16 commits
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Benjamin Gray authored
Adds a local TLB flush operation that works given an mm_struct, VA to flush, and page size representation. Most implementations mirror the surrounding code. The book3s/32/tlbflush.h implementation is left as a BUILD_BUG because it is more complicated and not required for anything as yet. This removes the need to create a vm_area_struct, which the temporary patching mm work does not need. Signed-off-by:
Benjamin Gray <bgray@linux.ibm.com> Reviewed-by:
Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20221109045112.187069-8-bgray@linux.ibm.com
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Benjamin Gray authored
These functions were introduced for "cxl: Enable global TLBIs for cxl contexts" [1], which ended up using them for Radix only. They were never implemented on Hash (and creating an implementation appears to be difficult), so nothing can actually rely on them. They behave differently to the existing surrounding functions too, in that they actually need to do something on Hash. The other functions are primarily for use in generic code that expects their definitions, but Hash updates the TLB during PTE updates. After replacing the only usage with the Radix specific version, there are no more users of these functions, and given they are not implemented anyway it is safe to delete them. [1]: https://patchwork.ozlabs.org/project/linuxppc-dev/patch/20170903181513.29635-1-fbarrat@linux.vnet.ibm.com/Signed-off-by:
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Benjamin Gray authored
The generic implementation of this function isn't really generic (Hash is not implemented). Unfortunately, the runtime warnings cannot be replaced with BUILD_BUG's, so it seems safer not to provide a stub in the first place. Signed-off-by:
Andrew Donnellan <ajd@linux.ibm.com> Reviewed-by:
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Benjamin Gray authored
The empty hash__* functions are unnecessary. The empty definitions were introduced when 64-bit Hash support was added, as the functions were still used in generic code. These empty definitions were prefixed with hash__ when Radix support was added, and new wrappers with the original names were added that selected the Radix or Hash version based on radix_enabled(). But the hash__ prefixed functions were not part of a public interface, so there is no need to include them for compatibility with anything. Generic code will use the non-prefixed wrappers, and Hash specific code will know that there is no point in calling them (or even worse, call them and expect them to do something). Signed-off-by:
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Benjamin Gray authored
BUG_ON() when failing to initialise the code patching window is unnecessary, and use of BUG_ON is discouraged. We don't set poking_init_done in this case, so failure to init the boot CPU will result in a strict RWX error when a following patch_instruction uses raw_patch_instruction. If it only fails for later CPUs, they won't be onlined in the first place. The return value of cpuhp_setup_state() is also >= 0 on success, so check for < 0. Signed-off-by:
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Jordan Niethe authored
For the coming temporary mm used for instruction patching, the breakpoint registers need to be cleared to prevent them from accidentally being triggered. As soon as the patching is done, the breakpoints will be restored. The breakpoint state is stored in the per-cpu variable current_brk[]. Add a suspend_breakpoints() function which will clear the breakpoint registers without touching the state in current_brk[]. Add a pair function restore_breakpoints() which will move the state in current_brk[] back to the registers. Signed-off-by:
Jordan Niethe <jniethe5@gmail.com> Signed-off-by:
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Pali Rohár authored
If there's no PCI host bridge with ISA then check for PCI host bridge with alias "pci0" (first PCI host bridge) and if it exists then choose it as the primary PCI host bridge. This makes choice of primary PCI host bridge more stable across boots and updates as the last fallback candidate for primary PCI host bridge (if there is no choice) is selected arbitrary. Signed-off-by:
Pali Rohár <pali@kernel.org> Signed-off-by:
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Pali Rohár authored
Channel 0 of SA56004ED chip refers to internal SA56004ED chip sensor (chip itself is located on the board) and channel 1 of SA56004ED chip refers to external sensor which is connected to temperature diode of the P2020 CPU. Fixes: 54c15ec3 ("powerpc: dts: Add DTS file for CZ.NIC Turris 1.x routers") Signed-off-by:
Marek Behún <kabel@kernel.org> Signed-off-by:
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Thomas Weißschuh authored
Commit 7ad4bd88 ("powerpc/book3e: get rid of #include <generated/compile.h>") removed the usage of the define UTS_RELEASE but forgot to drop the include. utsrelease.h is potentially generated on each build. By removing the unused include we can get rid of some spurious recompilations. Fixes: 7ad4bd88 ("powerpc/book3e: get rid of #include <generated/compile.h>") Signed-off-by:
Thomas Weißschuh <linux@weissschuh.net> Reviewed-by:
Masahiro Yamada <masahiroy@kernel.org> Reviewed-by:
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Naveen N. Rao authored
For systemwide tests, use online cpu mask to only open events on online cpus. This enables this test to work on systems in lower SMT modes. Signed-off-by:
Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by:
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Naveen N. Rao authored
The systemwide perf hardware breakpoint test tries to open a perf event on each cpu. On large systems, we run out of file descriptors and fail the test. Instead, have the test set the file descriptor limit to an arbitraty high value. Reported-by:
Rohan Deshpande <rohan_d@linux.vnet.ibm.com> Signed-off-by:
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Naveen N. Rao authored
Right now, if perf_event_open() fails for the systemwide tests, error report is printed too late, sometimes after subsequent system calls. Move use of perror() to the main function, just after the syscall. Signed-off-by:
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Christoph Hellwig authored
ps3_system_bus_type is only used inside of system-bus.c, so remove the external declaration and the very outdated comment next to it. Signed-off-by:
Christoph Hellwig <hch@lst.de> Acked-by:
Geoff Levand <geoff@infradead.org> Signed-off-by:
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Michael Ellerman authored
Merge our fixes branch to bring in some changes that are prerequisites for work in next.
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Michael Ellerman authored
Merge our KVM topic branch.
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Nicholas Piggin authored
32-bit does not trace_irqs_off() to match the trace_irqs_on() call in kvmppc_fix_ee_before_entry(). This can lead to irqs being enabled twice in the trace, and the irqs-off region between guest exit and the host enabling local irqs again is not properly traced. 64-bit code does call this, but from asm code where volatiles are live and so incorrectly get clobbered. Move the irq reconcile into C to fix both problems. Signed-off-by:
Nicholas Piggin <npiggin@gmail.com> Signed-off-by:
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- 25 Nov, 2022 1 commit
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Michael Ellerman authored
There's no declaration for machine_check_early_boot(), which leads to a build failure with W=1. Add one. Fixes: 2f5182cf ("powerpc/64s: early boot machine check handler") Signed-off-by:
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- 24 Nov, 2022 23 commits
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Tiezhu Yang authored
The latest version of grep claims the egrep is now obsolete so the build now contains warnings that look like: egrep: warning: egrep is obsolescent; using grep -E fix this up by moving the related file to use "grep -E" instead. sed -i "s/egrep/grep -E/g" `grep egrep -rwl arch/powerpc` Here are the steps to install the latest grep: wget http://ftp.gnu.org/gnu/grep/grep-3.8.tar.gz tar xf grep-3.8.tar.gz cd grep-3.8 && ./configure && make sudo make install export PATH=/usr/local/bin:$PATH Signed-off-by:
Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by:
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Nayna Jain authored
Even though plpks_read_var() is currently called to read variables owned by different consumers, it internally supports only OS consumer. Fix plpks_read_var() to handle different consumers correctly. Fixes: 2454a7af ("powerpc/pseries: define driver for Platform KeyStore") Signed-off-by:
Nayna Jain <nayna@linux.ibm.com> Signed-off-by:
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Nayna Jain authored
Replace kmalloc with kzalloc in construct_auth() function to default initialize structure with zeroes. Signed-off-by:
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Nayna Jain authored
Logging H_CALL return codes in PLPKS driver are easy to confuse with Linux error codes. Let the caller of the function log the converted linux error code. Signed-off-by:
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Nayna Jain authored
Some commands for eg. "cat" might continue to retry on encountering EINTR. This is not expected for original error code H_ABORTED. Map H_ABORTED to more relevant Linux error code EIO. Fixes: 2454a7af ("powerpc/pseries: define driver for Platform KeyStore") Signed-off-by:
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Nayna Jain authored
PAPR Spec defines H_P1 actually as H_PARAMETER and maps H_ABORTED to a different numerical value. Fix the error codes as per PAPR Specification. Fixes: 2454a7af ("powerpc/pseries: define driver for Platform KeyStore") Signed-off-by:
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Nayna Jain authored
OS_VAR_LINUX enum in PLPKS driver should be 0x02 instead of 0x01. Fixes: 2454a7af ("powerpc/pseries: define driver for Platform KeyStore") Signed-off-by:
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Chen Lifu authored
1. ppc_override_l2cr and ppc_override_l2cr_value are only used in l2cr_init() function, remove them and used *l2cr directly. 2. has_l2cache is not used outside of the file, so mark it static and do not initialise statics to 0. Fixes the following warnings: arch/powerpc/platforms/powermac/setup.c:73:5: warning: symbol 'ppc_override_l2cr' was not declared. Should it be static? arch/powerpc/platforms/powermac/setup.c:74:5: warning: symbol 'ppc_override_l2cr_value' was not declared. Should it be static? arch/powerpc/platforms/powermac/setup.c:75:5: warning: symbol 'has_l2cache' was not declared. Should it be static? Signed-off-by:
Chen Lifu <chenlifu@huawei.com> Reviewed-by:
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Bo Liu authored
Fixes the following W=1 kernel build warning(s): arch/powerpc/platforms/pseries/eeh_pseries.c:163: warning: Function parameter or member 'config_addr' not described in 'pseries_eeh_phb_reset' arch/powerpc/platforms/pseries/eeh_pseries.c:163: warning: Excess function parameter 'config_adddr' description in 'pseries_eeh_phb_reset' arch/powerpc/platforms/pseries/eeh_pseries.c:198: warning: Function parameter or member 'config_addr' not described in 'pseries_eeh_phb_configure_bridge' arch/powerpc/platforms/pseries/eeh_pseries.c:198: warning: Excess function parameter 'config_adddr' description in 'pseries_eeh_phb_configure_bridge' Signed-off-by:
Bo Liu <liubo03@inspur.com> Signed-off-by:
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Russell Currey authored
In hw_breakpoint_handler(), ea is set by wp_get_instr_detail() except for 8xx, leading the variable to be passed uninitialised to wp_check_constraints(). This is safe as wp_check_constraints() returns early without using ea, so just set it to make the compiler happy. Signed-off-by:
Russell Currey <ruscur@russell.cc> Reviewed-by:
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Shaomin Deng authored
Remove the repeated word "not" in comments. Signed-off-by:
Shaomin Deng <dengshaomin@cdjrlc.com> Signed-off-by:
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Colin Ian King authored
There is a spelling mistake in a perror message. Fix it. Signed-off-by:
Colin Ian King <colin.i.king@gmail.com> Signed-off-by:
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Naveen N. Rao authored
preempt_enable_no_resched() is just the same as preempt_enable() when we are in a irqs disabled context. kprobe_handler() and the post/fault handlers are all called with irqs disabled. As such, convert those to just use preempt_enable(). Reported-by:
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Naveen N. Rao authored
Similar to x86 commit 2e62024c ("kprobes/x86: Use preempt_enable() in optimized_callback()"), change powerpc optprobes to use preempt_enable() rather than preempt_enable_no_resched() since powerpc also removed irq disabling for optprobes in commit f72180cc ("powerpc/kprobes: Do not disable interrupts for optprobes and kprobes_on_ftrace"). Reported-by:
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Naveen N. Rao authored
arch_prepare_kprobe() is called from register_kprobe() via prepare_kprobe(), or through register_aggr_kprobe(), both with the kprobe_mutex held. Per the comment for get_kprobe(): /* * This routine is called either: * - under the 'kprobe_mutex' - during kprobe_[un]register(). * OR * - with preemption disabled - from architecture specific code. */ As such, there is no need to disable preemption around the call to get_kprobe(). Drop the same. Reported-by:
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ruanjinjie authored
When build Linux kernel, encounter the following warnings: ./arch/powerpc/sysdev/mpic_msgr.c:230:38: warning: cast removes address space '__iomem' of expression ./arch/powerpc/sysdev/mpic_msgr.c:230:27: warning: incorrect type in assignment (different address spaces) The data type of msgr->mer and msgr->base are 'u32 __iomem *', but converted to 'u32 *' and 'u8 *' directly and cause above warnings, now instead of using a type cast, change the size of the pointer offset to fix these warnings. Signed-off-by:
ruanjinjie <ruanjinjie@huawei.com> Reviewed-by:
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Yang Yingliang authored
If remapping 'data->trig_page' fails, the 'data->eoi_mmio' need be unmapped before returning from xive_spapr_populate_irq_data(). Fixes: eac1e731 ("powerpc/xive: guest exploitation of the XIVE interrupt controller") Signed-off-by:
Yang Yingliang <yangyingliang@huawei.com> Reviewed-by:
Cédric Le Goater <clg@kaod.org> Signed-off-by:
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Stephen Rothwell authored
This is a follow on from commit 0d362be5 ("Makefile: link with -z noexecstack --no-warn-rwx-segments") for arch/powerpc/boot to address wanrings like: ld: warning: opal-calls.o: missing .note.GNU-stack section implies executable stack ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker ld: warning: arch/powerpc/boot/zImage.epapr has a LOAD segment with RWX permissions This fixes issue https://github.com/linuxppc/issues/issues/417Signed-off-by:
Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
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Christophe JAILLET authored
At the beginning of the file, we have: #define pr_fmt(fmt) "xive: " fmt So, there is no need to duplicate "XIVE:" in debug and error messages. For the records, these useless prefix have been added in commit 5af50993 ("KVM: PPC: Book3S HV: Native usage of the XIVE interrupt controller") Signed-off-by:
Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by:
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Nicholas Piggin authored
cputime_t was a core kernel type, removed by commits ed5c8c85..b672592f. As explained in commit b672592f ("sched/cputime: Remove generic asm headers"), the final cleanup is for the arch to provide cputime_to_nsec[s](). Commit ade7667a ("powerpc: Add cputime_to_nsecs()") did that, but justdidn't remove the then-unused cputime_to_usecs(), cputime_t type, and associated remnants. Signed-off-by:
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Michael Ellerman authored
Although the previous commit made the powerpc instruction dump usable with scripts/decodecode, there are still some problems. Because the dump is split across multiple lines, the script doesn't cope with printk timestamps or caller info. That can be fixed by printing the entire dump on one line, eg: [ 12.016307][ T112] --- interrupt: c00 [ 12.016605][ T112] Code: 4b7aae15 60000000 3d22016e 3c62ffec 39291160 38639bc0 e8890000 4b7aadf9 60000000 4bfffee8 7c0802a6 60000000 <0fe00000> 60420000 3c4c008f 384268a0 [ 12.017655][ T112] ---[ end trace 0000000000000000 ]--- That output can then be piped directly into scripts/decodecode and interpreted correctly. Printing the dump on a single line does produce a very long line, about 173 characters. That is still shorter than x86, which prints nearly 200 characters even without timestamps etc. All consoles I'm aware of will wrap the line if it's too long, so the length should not be a functional problem. If anything it should help on consoles like VGA by using less vertical space. Signed-off-by:
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Michael Ellerman authored
Matt reported that scripts/decodecode doesn't work for the instruction dump in the powerpc oops output. Although there are scripts around that can decode it, it would be preferable if the standard in-tree script worked. All other arches prefix the instruction dump with "Code:", and that's what the script looks for, so use that. The script then works as expected: $ CROSS_COMPILE=powerpc64le-linux-gnu- ./scripts/decodecode Code: fbc1fff0 f821ffc1 7c7d1b78 7c9c2378 ebc30028 7fdff378 48000018 60000000 60000000 ebff0008 7c3ef840 41820048 <815f0060> e93f0000 5529077c 7d295378 ^D All code ======== 0: f0 ff c1 fb std r30,-16(r1) 4: c1 ff 21 f8 stdu r1,-64(r1) 8: 78 1b 7d 7c mr r29,r3 ... Note that the script doesn't cope well with printk timestamps or printk caller info. Reported-by:Matthew Wilcox <willy@infradead.org> Signed-off-by:
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Joel Stanley authored
This is the register layout of the litesd peripheral for the fusesoc based Microwatt SoC. It requires a description of the system clock, which is hardcoded to 100MHz. Signed-off-by:
Joel Stanley <joel@jms.id.au> Signed-off-by:
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