From: Sunil V L <sunilvl@ventanamicro.com>
To: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
linux-acpi@vger.kernel.org, linux-pci@vger.kernel.org,
linux-serial@vger.kernel.org, acpica-devel@lists.linux.dev
Cc: "Catalin Marinas" <catalin.marinas@arm.com>,
"Will Deacon" <will@kernel.org>,
"Paul Walmsley" <paul.walmsley@sifive.com>,
"Albert Ou" <aou@eecs.berkeley.edu>,
"Rafael J . Wysocki" <rafael@kernel.org>,
"Len Brown" <lenb@kernel.org>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Anup Patel" <anup@brainfault.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Samuel Holland" <samuel.holland@sifive.com>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Jiri Slaby" <jirislaby@kernel.org>,
"Robert Moore" <robert.moore@intel.com>,
"Conor Dooley" <conor.dooley@microchip.com>,
"Andrew Jones" <ajones@ventanamicro.com>,
"Andy Shevchenko" <andriy.shevchenko@linux.intel.com>,
"Marc Zyngier" <maz@kernel.org>,
"Atish Kumar Patra" <atishp@rivosinc.com>,
"Andrei Warkentin" <andrei.warkentin@intel.com>,
"Haibo1 Xu" <haibo1.xu@intel.com>,
"Björn Töpel" <bjorn@kernel.org>,
"Sunil V L" <sunilvl@ventanamicro.com>
Subject: [PATCH v5 02/17] ACPI: scan: Add a weak function to reorder the IRQCHIP probe
Date: Wed, 1 May 2024 17:47:27 +0530 [thread overview]
Message-ID: <20240501121742.1215792-3-sunilvl@ventanamicro.com> (raw)
In-Reply-To: <20240501121742.1215792-1-sunilvl@ventanamicro.com>
Unlike OF framework, the irqchip probe using IRQCHIP_ACPI_DECLARE has no
order defined. Depending on the Makefile is not a good idea. So,
usually it is worked around by mandating only root interrupt controller
probed using IRQCHIP_ACPI_DECLARE and other interrupt controllers are
probed via cascade mechanism.
However, this is also not a clean solution because if there are multiple
root controllers (ex: RINTC in RISC-V which is per CPU) which need to be
probed first, then the cascade will happen for every root controller.
So, introduce a architecture specific weak function to order the probing
of the interrupt controllers which can be implemented by different
architectures as per their interrupt controller hierarchy.
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
---
drivers/acpi/scan.c | 3 +++
include/linux/acpi.h | 2 ++
2 files changed, 5 insertions(+)
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 4804a2ad1578..837b8fc89dfb 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -2744,6 +2744,8 @@ static int __init acpi_match_madt(union acpi_subtable_headers *header,
return 0;
}
+void __weak arch_sort_irqchip_probe(struct acpi_probe_entry *ap_head, int nr) { }
+
int __init __acpi_probe_device_table(struct acpi_probe_entry *ap_head, int nr)
{
int count = 0;
@@ -2752,6 +2754,7 @@ int __init __acpi_probe_device_table(struct acpi_probe_entry *ap_head, int nr)
return 0;
mutex_lock(&acpi_probe_mutex);
+ arch_sort_irqchip_probe(ap_head, nr);
for (ape = ap_head; nr; ape++, nr--) {
if (ACPI_COMPARE_NAMESEG(ACPI_SIG_MADT, ape->id)) {
acpi_probe_count = 0;
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index c2ae33b8dbb6..1afa289f1f4e 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -1339,6 +1339,8 @@ struct acpi_probe_entry {
kernel_ulong_t driver_data;
};
+void arch_sort_irqchip_probe(struct acpi_probe_entry *ap_head, int nr);
+
#define ACPI_DECLARE_PROBE_ENTRY(table, name, table_id, subtable, \
valid, data, fn) \
static const struct acpi_probe_entry __acpi_probe_##name \
--
2.40.1
next prev parent reply other threads:[~2024-05-01 12:18 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-01 12:17 [PATCH v5 00/17] RISC-V: ACPI: Add external interrupt controller support Sunil V L
2024-05-01 12:17 ` [PATCH v5 01/17] arm64: PCI: Migrate ACPI related functions to pci-acpi.c Sunil V L
2024-05-01 12:59 ` Will Deacon
2024-05-02 9:22 ` Andy Shevchenko
2024-05-02 9:56 ` Sunil V L
2024-05-01 12:17 ` Sunil V L [this message]
2024-05-01 12:17 ` [PATCH v5 03/17] ACPI: bus: Add acpi_riscv_init function Sunil V L
2024-05-02 9:24 ` Andy Shevchenko
2024-05-02 10:02 ` Sunil V L
2024-05-02 10:12 ` Sudeep Holla
2024-05-02 10:19 ` Andy Shevchenko
2024-05-02 11:00 ` Sunil V L
2024-05-01 12:17 ` [PATCH v5 04/17] ACPI: scan: Refactor dependency creation Sunil V L
2024-05-02 9:20 ` Andy Shevchenko
2024-05-02 9:55 ` Sunil V L
2024-05-01 12:17 ` [PATCH v5 05/17] ACPI: scan: Add RISC-V interrupt controllers to honor list Sunil V L
2024-05-01 12:17 ` [PATCH v5 06/17] ACPI: scan: Define weak function to populate dependencies Sunil V L
2024-05-01 12:17 ` [PATCH v5 07/17] ACPI: bus: Add RINTC IRQ model for RISC-V Sunil V L
2024-05-23 21:59 ` Bjorn Helgaas
2024-05-27 4:35 ` Sunil V L
2024-05-01 12:17 ` [PATCH v5 08/17] ACPI: pci_link: Clear the dependencies after probe Sunil V L
2024-05-01 16:56 ` Bjorn Helgaas
2024-05-02 9:25 ` Andy Shevchenko
2024-05-02 9:32 ` Sunil V L
2024-05-01 12:17 ` [PATCH v5 09/17] ACPI: RISC-V: Implement PCI related functionality Sunil V L
2024-05-01 12:17 ` [PATCH v5 10/17] ACPI: RISC-V: Implement function to reorder irqchip probe entries Sunil V L
2024-05-01 12:17 ` [PATCH v5 11/17] ACPI: RISC-V: Initialize GSI mapping structures Sunil V L
2024-05-01 12:17 ` [PATCH v5 12/17] ACPI: RISC-V: Implement function to add implicit dependencies Sunil V L
2024-05-01 12:17 ` [PATCH v5 13/17] irqchip/riscv-intc: Add ACPI support for AIA Sunil V L
2024-05-23 21:47 ` Thomas Gleixner
2024-05-27 4:39 ` Sunil V L
2024-05-01 12:17 ` [PATCH v5 14/17] irqchip/riscv-imsic: Add ACPI support Sunil V L
2024-05-23 22:00 ` Thomas Gleixner
2024-05-27 4:52 ` Sunil V L
2024-05-01 12:17 ` [PATCH v5 15/17] irqchip/riscv-aplic: " Sunil V L
2024-05-01 12:17 ` [PATCH v5 16/17] irqchip/sifive-plic: " Sunil V L
2024-05-01 12:17 ` [PATCH v5 17/17] serial: 8250: Add 8250_acpi driver Sunil V L
2024-05-02 9:17 ` Andy Shevchenko
2024-05-02 9:50 ` Sunil V L
2024-05-02 10:09 ` Andy Shevchenko
2024-05-02 11:20 ` Sunil V L
2024-05-02 15:35 ` Andy Shevchenko
2024-05-03 13:59 ` Sunil V L
2024-05-03 15:32 ` Andy Shevchenko
2024-05-06 11:45 ` Sunil V L
2024-05-04 15:53 ` Greg Kroah-Hartman
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