diff options
| author | Markus Stockhausen <markus.stockhausen@gmx.de> | 2022-09-18 20:30:39 +0200 |
|---|---|---|
| committer | Sander Vanheule <sander@svanheule.net> | 2022-09-18 20:38:56 +0200 |
| commit | 3f41360eb70c775764408b6dd353d83fa6cab943 (patch) | |
| tree | 03664a86191290d5737deb905ff692e65c858d5f /target | |
| parent | bcb5d6b21ba574db1d02385b494eb01fe46bf8aa (diff) | |
| download | upstream-3f41360eb70c775764408b6dd353d83fa6cab943.tar.gz upstream-3f41360eb70c775764408b6dd353d83fa6cab943.tar.bz2 upstream-3f41360eb70c775764408b6dd353d83fa6cab943.zip | |
realtek: use upstream recommendation for secondary CPU start
Currently we fix interrupts/timers for the secondary CPU by patching
vsmp_init_secondary(). Get a little bit more generic and use the
upstream recommended way instead. Additionally avoid a check around
register_cps_smp_ops() because it does that itself.
See https://lkml.org/lkml/2022/9/12/522
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Diffstat (limited to 'target')
| -rw-r--r-- | target/linux/realtek/files-5.10/arch/mips/rtl838x/prom.c | 36 | ||||
| -rw-r--r-- | target/linux/realtek/patches-5.10/309-cevt-rtl9300-support.patch | 21 |
2 files changed, 31 insertions, 26 deletions
diff --git a/target/linux/realtek/files-5.10/arch/mips/rtl838x/prom.c b/target/linux/realtek/files-5.10/arch/mips/rtl838x/prom.c index ad8c2d75f2..ae768f9338 100644 --- a/target/linux/realtek/files-5.10/arch/mips/rtl838x/prom.c +++ b/target/linux/realtek/files-5.10/arch/mips/rtl838x/prom.c @@ -29,6 +29,28 @@ extern const char __appended_dtb; struct rtl83xx_soc_info soc_info; const void *fdt; +#ifdef CONFIG_MIPS_MT_SMP +extern const struct plat_smp_ops vsmp_smp_ops; + +static void rtl_init_secondary(void) +{ +/* + * MIPS timer interrupt might fire like crazy if not used or initialized + * properly. Silence it by setting the maximum possible interval. + */ + write_c0_compare(0); +/* + * Enable all CPU interrupts, as everything is managed by the external + * controller. TODO: Standard vsmp_init_secondary() has special treatment for + * Malta if external GIC is available. Maybe we need this too. + */ + if (mips_gic_present()) + pr_warn("%s: GIC present. Maybe interrupt enabling required.\n", __func__); + else + set_c0_status(ST0_IM); +} +#endif + const char *get_system_type(void) { return soc_info.name; @@ -193,15 +215,19 @@ void __init prom_init(void) prom_init_cmdline(); -#ifdef CONFIG_MIPS_CPS - if (!register_cps_smp_ops()) { + if (!register_cps_smp_ops()) return; - } -#endif + #ifdef CONFIG_MIPS_MT_SMP - if (!register_vsmp_smp_ops()) { + if (cpu_has_mipsmt) { + struct plat_smp_ops rtl_smp_ops; + + rtl_smp_ops = vsmp_smp_ops; + rtl_smp_ops.init_secondary = rtl_init_secondary; + register_smp_ops(&rtl_smp_ops); return; } #endif + register_up_smp_ops(); } diff --git a/target/linux/realtek/patches-5.10/309-cevt-rtl9300-support.patch b/target/linux/realtek/patches-5.10/309-cevt-rtl9300-support.patch index 6a0038d86b..2b9102633e 100644 --- a/target/linux/realtek/patches-5.10/309-cevt-rtl9300-support.patch +++ b/target/linux/realtek/patches-5.10/309-cevt-rtl9300-support.patch @@ -31,24 +31,3 @@ #ifdef CONFIG_CEVT_R4K return r4k_clockevent_init(); #else ---- a/arch/mips/kernel/smp-mt.c -+++ b/arch/mips/kernel/smp-mt.c -@@ -108,12 +108,18 @@ static void __init smvp_tc_init(unsigned - static void vsmp_init_secondary(void) - { - /* This is Malta specific: IPI,performance and timer interrupts */ -+ -+ /* RTL9300 Clear internal timer interrupt */ -+ write_c0_compare(0); -+ - if (mips_gic_present()) - change_c0_status(ST0_IM, STATUSF_IP2 | STATUSF_IP3 | - STATUSF_IP4 | STATUSF_IP5 | - STATUSF_IP6 | STATUSF_IP7); - else - change_c0_status(ST0_IM, STATUSF_IP0 | STATUSF_IP1 | -+ STATUSF_IP2 | STATUSF_IP3 | -+ STATUSF_IP4 | STATUSF_IP5 | - STATUSF_IP6 | STATUSF_IP7); - } - |