Commit c6e2ccb6 authored by Marc Zyngier's avatar Marc Zyngier

irqchip/gic-v3-its: Use pre-programmed redistributor tables with kdump kernels

If using a kdump kernel, and that we cannot disable LPIs to install
our own tables, let's switch to using the already allocated tables.

This means that we'll change some of the initial kernel's memory,
but at least we'll be able to have LPIs in this secondary kernel.
Tested-by: default avatarJeremy Linton <jeremy.linton@arm.com>
Tested-by: default avatarBhupesh Sharma <bhsharma@redhat.com>
Tested-by: default avatarLei Zhang <zhang.lei@jp.fujitsu.com>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent c440a9d9
...@@ -19,6 +19,7 @@ ...@@ -19,6 +19,7 @@
#include <linux/acpi_iort.h> #include <linux/acpi_iort.h>
#include <linux/bitmap.h> #include <linux/bitmap.h>
#include <linux/cpu.h> #include <linux/cpu.h>
#include <linux/crash_dump.h>
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/dma-iommu.h> #include <linux/dma-iommu.h>
#include <linux/interrupt.h> #include <linux/interrupt.h>
...@@ -1963,8 +1964,15 @@ static void its_free_pending_table(struct page *pt) ...@@ -1963,8 +1964,15 @@ static void its_free_pending_table(struct page *pt)
free_pages((unsigned long)page_address(pt), get_order(LPI_PENDBASE_SZ)); free_pages((unsigned long)page_address(pt), get_order(LPI_PENDBASE_SZ));
} }
/*
* Booting with kdump and LPIs enabled is generally fine.
*/
static bool enabled_lpis_allowed(void) static bool enabled_lpis_allowed(void)
{ {
/* Allow a kdump kernel */
if (is_kdump_kernel())
return true;
return false; return false;
} }
......
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