xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

x86, irq, ACPI: Implement interface to support ACPI based IOAPIC hot-addition

Browse Source 
Implement acpi_register_ioapic() and enhance mp_register_ioapic()
to support ACPI based IOAPIC hot-addition.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Len Brown <len.brown@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Link: http://lkml.kernel.org/r/1414387308-27148-16-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Jiang Liu
2014-10-27 13:21:45 +08:00
committed by Thomas Gleixner
parent 5da2fd2619
commit 7db298cb70
2 changed files with 50 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
arch/x86/kernel/apic/io_apic.c
View File

@@ -3861,7 +3861,13 @@ static int bad_ioapic_register(int idx)
static int find_free_ioapic_entry(void)
{
return nr_ioapics;
int idx;
for (idx = 0; idx < MAX_IO_APICS; idx++)
if (ioapics[idx].nr_registers == 0)
return idx;
return MAX_IO_APICS;
}
/**
@@ -3874,6 +3880,7 @@ static int find_free_ioapic_entry(void)
int mp_register_ioapic(int id, u32 address, u32 gsi_base,
struct ioapic_domain_cfg *cfg)
{
bool hotplug = !!ioapic_initialized;
struct mp_ioapic_gsi *gsi_cfg;
int idx, ioapic, entries;
u32 gsi_end;
@@ -3935,6 +3942,19 @@ int mp_register_ioapic(int id, u32 address, u32 gsi_base,
ioapics[idx].irqdomain = NULL;
ioapics[idx].irqdomain_cfg = *cfg;
/*
* If mp_register_ioapic() is called during early boot stage when
* walking ACPI/SFI/DT tables, it's too early to create irqdomain,
* we are still using bootmem allocator. So delay it to setup_IO_APIC().
*/
if (hotplug) {
if (mp_irqdomain_create(idx)) {
clear_fixmap(FIX_IO_APIC_BASE_0 + idx);
return -ENOMEM;
}
alloc_ioapic_saved_registers(idx);
}
if (gsi_cfg->gsi_end >= gsi_top)
gsi_top = gsi_cfg->gsi_end + 1;
if (nr_ioapics <= idx)