Dependencies Required for Kaanapali on UFS#272
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nitinrawat123 merged 3 commits intoqualcomm-linux:tech/storage/allfrom Nov 6, 2025
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Dependencies Required for Kaanapali on UFS#272nitinrawat123 merged 3 commits intoqualcomm-linux:tech/storage/allfrom
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Document the UFS Controller on the Kaanapali Platform. Signed-off-by: Nitin Rawat <nitin.rawat@oss.qualcomm.com> Signed-off-by: Jingyi Wang <jingyi.wang@oss.qualcomm.com> Signed-off-by: Yijie Yang <yijie.yang@oss.qualcomm.com> Link: https://lore.kernel.org/all/20250924-knp-ufs-v1-1-42e0955a1f7c@oss.qualcomm.com/
Document the QMP UFS PHY compatible for Qualcomm Kaanapali to support physical layer functionality for UFS found on the SoC. Use fallback to indicate the compatibility of the QMP UFS PHY on the Kaanapali with that on the SM8750. Signed-off-by: Jingyi Wang <jingyi.wang@oss.qualcomm.com> Acked-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com> Signed-off-by: Yijie Yang <yijie.yang@oss.qualcomm.com> Link: https://lore.kernel.org/all/20250924-knp-ufs-v1-2-42e0955a1f7c@oss.qualcomm.com/
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Hi, |
Document the compatible string for the SDHCI controller on the Kaanapali platform. Signed-off-by: Manish Pandey <manish.pandey@oss.qualcomm.com> Signed-off-by: Jingyi Wang <jingyi.wang@oss.qualcomm.com> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Link: https://lore.kernel.org/all/20250924-knp-sdcard-v1-1-fc54940066f1@oss.qualcomm.com/ Signed-off-by: Yijie Yang <yijie.yang@oss.qualcomm.com>
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Do not use memcpy() to extract syscall arguments from struct pt_regs but
rather just perform direct assignments.
Update syscall_set_arguments() too to keep syscall_get_arguments() and
syscall_set_arguments() in sync.
With Generic Entry patch[1] and turn on audit, the performance benchmarks
from perf bench basic syscall on kunpeng920 gives roughly a 1% performance
uplift.
| Metric | W/O this patch | With this patch | Change |
| ---------- | -------------- | --------------- | --------- |
| Total time | 2.241 [sec] | 2.211 [sec] | ↓1.36% |
| usecs/op | 0.224157 | 0.221146 | ↓1.36% |
| ops/sec | 4,461,157 | 4,501,409 | ↑0.9% |
Disassembly shows that using direct assignment causes
syscall_set_arguments() to be inlined and cuts the instruction count by
five or six compared to memcpy(). Because __audit_syscall_entry() only
uses four syscall arguments, the compiler has also elided the copy of
regs->regs[4] and regs->regs[5].
Before:
<syscall_get_arguments.constprop.0>:
aa0103e2 mov x2, x1
91002003 add x3, x0, #0x8
f9408804 ldr x4, [x0, #272]
f8008444 str x4, [x2], #8
a9409404 ldp x4, x5, [x0, #8]
a9009424 stp x4, x5, [x1, #8]
a9418400 ldp x0, x1, [x0, #24]
a9010440 stp x0, x1, [x2, #16]
f9401060 ldr x0, [x3, #32]
f9001040 str x0, [x2, #32]
d65f03c0 ret
d503201f nop
After:
a9408e82 ldp x2, x3, [x20, #8]
2a1603e0 mov w0, w22
f9400e84 ldr x4, [x20, #24]
f9408a81 ldr x1, [x20, #272]
9401c4ba bl ffff800080215ca8 <__audit_syscall_entry>
This also aligns the implementation with x86 and RISC-V.
Link: https://lkml.kernel.org/r/20251201120633.1193122-3-ruanjinjie@huawei.com
Link: https://lore.kernel.org/all/20251126071446.3234218-1-ruanjinjie@huawei.com/ [1]
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Charlie Jenkins <charlie@rivosinc.com>
Cc: Christian Zankel <chris@zankel.net>
Cc: "Dmitry V. Levin" <ldv@strace.io>
Cc: Helge Deller <deller@gmx.de>
Cc: Maciej W. Rozycki <macro@orcam.me.uk>
Cc: Marc Rutland <mark.rutland@arm.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleinxer <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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