Upon enabling a redistributor, let's register the allocated tables with the EFI table that tracks the memory reservations.
Signed-off-by: Marc Zyngier <[email protected]> --- drivers/irqchip/irq-gic-v3-its.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 4d9604dd6fb1..4912dc57bf07 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -22,6 +22,7 @@ #include <linux/crash_dump.h> #include <linux/delay.h> #include <linux/dma-iommu.h> +#include <linux/efi.h> #include <linux/interrupt.h> #include <linux/irqdomain.h> #include <linux/list.h> @@ -1628,6 +1629,14 @@ static void its_free_prop_table(struct page *prop_page) get_order(LPI_PROPBASE_SZ)); } +static int gic_reserve_range(phys_addr_t addr, unsigned long size) +{ + if (efi_enabled(EFI_CONFIG_TABLES)) + return efi_mem_reserve_persistent(addr, size); + + return 0; +} + static int __init its_alloc_lpi_prop_table(void) { if (gic_rdists->flags & RDIST_FLAGS_RD_TABLES_PREALLOCATED) { @@ -1655,6 +1664,8 @@ static int __init its_alloc_lpi_prop_table(void) gic_rdists->prop_table_pa = page_to_phys(page); gic_rdists->prop_table_va = page_address(page); + WARN_ON(gic_reserve_range(gic_rdists->prop_table_pa, + LPI_PROPBASE_SZ)); } pr_info("GICv3: using LPI property table @%pa\n", @@ -2049,6 +2060,7 @@ static void its_cpu_init_lpis(void) pend_page = gic_data_rdist()->pend_page; paddr = page_to_phys(pend_page); + WARN_ON(gic_reserve_range(paddr, LPI_PENDBASE_SZ)); /* set PROPBASE */ val = (gic_rdists->prop_table_pa | -- 2.18.0
