From 3462c371c2562a8144f4245f9967df99874e505f Mon Sep 17 00:00:00 2001 From: Mitchell Horne Date: Fri, 31 Mar 2023 12:32:39 -0300 Subject: [PATCH] arm64/gicv3: correct the size of the distributor resource Use the GICD_SIZE macro (0x10000), which is half the size of the current fixed-sized mapping (128 * 1024 == 0x20000). In ARM64 Hyper-V instances, it seems the Distributor's registers are located immediately preceding a range of physical memory in the bus address space. Thus, when ram0 is attaching and attempts to reserve SYS_RES_MEMORY resources corresponding to its physmem ranges, it fails, because the first 0x10000 bytes of this range are already owned by gic0. PR: 270415 Reported by: whu Tested by: whu Differential Revision: https://reviews.freebsd.org/D39260 --- sys/arm64/arm64/gic_v3_acpi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sys/arm64/arm64/gic_v3_acpi.c b/sys/arm64/arm64/gic_v3_acpi.c index 090c61429441..9c4e02c15706 100644 --- a/sys/arm64/arm64/gic_v3_acpi.c +++ b/sys/arm64/arm64/gic_v3_acpi.c @@ -215,7 +215,7 @@ gic_v3_acpi_identify(driver_t *driver, device_t parent) /* Add the MADT data */ BUS_SET_RESOURCE(parent, dev, SYS_RES_MEMORY, 0, - madt_data.dist->BaseAddress, 128 * 1024); + madt_data.dist->BaseAddress, GICD_SIZE); madt_data.dev = dev; madt_data.rdist_use_gicc = false;