From 3a2c4d55e32ad65efebdb6de44eef3bfa08bb49d Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Wed, 2 Sep 2026 15:31:14 -0700 Subject: treewide: refresh kmalloc_obj() conversions This is another run of the Coccinelle script for converting kmalloc() family of allocations to kmalloc_obj() via the existing rules in scripts/coccinelle/api/kmalloc_objs.cocci This catches both the set of kmalloc() uses added since the first kmalloc_obj() conversions in v7.0 and adds a large group missed in the first pass due to Coccinelle not interacting well with the cleanup.h scoped_...() family of macros[1]. I worked around this with spatch's "--macro-file" argument to a file with all the scoped_...() macros mapped to Coccinelle's YACFE_ITERATOR[2] as that was the closest viable control flow indicator I could find. Build tested allmodconfig on x86, arm64, arm, loongarch, mips, powerpc, riscv, and s390 with no new warnings. Link: https://lore.kernel.org/lkml/202609021314.8A9C0B8@keescook/ [1] Link: https://github.com/coccinelle/coccinelle/blob/master/standard.h [2] Signed-off-by: Kees Cook --- arch/mips/generic/board-ranchu.c | 90 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 90 insertions(+) create mode 100644 arch/mips/generic/board-ranchu.c (limited to 'arch/mips/generic/board-ranchu.c') diff --git a/arch/mips/generic/board-ranchu.c b/arch/mips/generic/board-ranchu.c new file mode 100644 index 000000000..930c45041 --- /dev/null +++ b/arch/mips/generic/board-ranchu.c @@ -0,0 +1,90 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Support code for virtual Ranchu board for MIPS. + * + * Author: Miodrag Dinic + */ + +#include +#include + +#include +#include +#include + +#define GOLDFISH_TIMER_LOW 0x00 +#define GOLDFISH_TIMER_HIGH 0x04 + +static __init u64 read_rtc_time(void __iomem *base) +{ + u32 time_low; + u32 time_high; + + /* + * Reading the low address latches the high value + * as well so there is no fear that we may read + * inaccurate high value. + */ + time_low = readl(base + GOLDFISH_TIMER_LOW); + time_high = readl(base + GOLDFISH_TIMER_HIGH); + + return ((u64)time_high << 32) | time_low; +} + +static __init unsigned int ranchu_measure_hpt_freq(void) +{ + u64 rtc_start, rtc_current, rtc_delta; + unsigned int start, count; + struct device_node *np; + void __iomem *rtc_base; + + np = of_find_compatible_node(NULL, NULL, "google,goldfish-rtc"); + if (!np) + panic("%s(): Failed to find 'google,goldfish-rtc' dt node!", + __func__); + + rtc_base = of_iomap(np, 0); + of_node_put(np); + if (!rtc_base) + panic("%s(): Failed to ioremap Goldfish RTC base!", __func__); + + /* + * Poll the nanosecond resolution RTC for one + * second to calibrate the CPU frequency. + */ + rtc_start = read_rtc_time(rtc_base); + start = read_c0_count(); + + do { + rtc_current = read_rtc_time(rtc_base); + rtc_delta = rtc_current - rtc_start; + } while (rtc_delta < NSEC_PER_SEC); + + count = read_c0_count() - start; + + /* + * Make sure the frequency will be a round number. + * Without this correction, the returned value may vary + * between subsequent emulation executions. + * + * TODO: Set this value using device tree. + */ + count += 5000; + count -= count % 10000; + + iounmap(rtc_base); + + return count; +} + +static const struct of_device_id ranchu_of_match[] __initconst = { + { + .compatible = "mti,ranchu", + }, + {} +}; + +MIPS_MACHINE(ranchu) = { + .matches = ranchu_of_match, + .measure_hpt_freq = ranchu_measure_hpt_freq, +}; -- cgit v1.3.1