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Diffstat (limited to 'bsp/meta-arm/meta-arm-autonomy/dynamic-layers/meta-arm-bsp/recipes-extended/xen/files/4.12.0/0001-xen-arm-Cap-the-number-of-interrupt-lines-for-dom0.patch')
-rw-r--r-- | bsp/meta-arm/meta-arm-autonomy/dynamic-layers/meta-arm-bsp/recipes-extended/xen/files/4.12.0/0001-xen-arm-Cap-the-number-of-interrupt-lines-for-dom0.patch | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/bsp/meta-arm/meta-arm-autonomy/dynamic-layers/meta-arm-bsp/recipes-extended/xen/files/4.12.0/0001-xen-arm-Cap-the-number-of-interrupt-lines-for-dom0.patch b/bsp/meta-arm/meta-arm-autonomy/dynamic-layers/meta-arm-bsp/recipes-extended/xen/files/4.12.0/0001-xen-arm-Cap-the-number-of-interrupt-lines-for-dom0.patch new file mode 100644 index 00000000..792bc9ea --- /dev/null +++ b/bsp/meta-arm/meta-arm-autonomy/dynamic-layers/meta-arm-bsp/recipes-extended/xen/files/4.12.0/0001-xen-arm-Cap-the-number-of-interrupt-lines-for-dom0.patch @@ -0,0 +1,44 @@ +From a41feccdb6c03f12bddb4fb650a0465f0ed6eeca Mon Sep 17 00:00:00 2001 +From: Lukas Juenger <juenger@ice.rwth-aachen.de> +Date: Fri, 5 Apr 2019 15:54:04 +0200 +Subject: [PATCH] xen/arm: Cap the number of interrupt lines for dom0 + +Dom0 vGIC will use the same number of interrupt lines as the hardware GIC. +While the hardware GIC can support up to 1020 interrupt lines, +the vGIC is only supporting up to 992 interrupt lines. +This means that Xen will not be able to boot on platforms where the hardware +GIC supports more than 992 interrupt lines. +While it would make sense to increase the limits in the vGICs, this is not +trivial because of the design choices. +At the moment, only models seem to report the maximum of interrupt lines. +They also do not have any interrupt wired above the 992 limit. +So it should be fine to cap the number of interrupt lines for dom0 to 992 lines. + +Signed-off-by: Lukas Juenger <juenger@ice.rwth-aachen.de> +Acked-by: Julien Grall <julien.grall@arm.com> +--- + xen/arch/arm/setup.c | 8 +++++++- + 1 file changed, 7 insertions(+), 1 deletion(-) + +diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c +index 444857a967..ccb0f181ea 100644 +--- a/xen/arch/arm/setup.c ++++ b/xen/arch/arm/setup.c +@@ -888,7 +888,13 @@ void __init start_xen(unsigned long boot_phys_offset, + /* Create initial domain 0. */ + /* The vGIC for DOM0 is exactly emulating the hardware GIC */ + dom0_cfg.arch.gic_version = XEN_DOMCTL_CONFIG_GIC_NATIVE; +- dom0_cfg.arch.nr_spis = gic_number_lines() - 32; ++ /* ++ * Xen vGIC supports a maximum of 992 interrupt lines. ++ * 32 are substracted to cover local IRQs. ++ */ ++ dom0_cfg.arch.nr_spis = min(gic_number_lines(), (unsigned int) 992) - 32; ++ if ( gic_number_lines() > 992 ) ++ printk(XENLOG_WARNING "Maximum number of vGIC IRQs exceeded.\n"); + dom0_cfg.max_vcpus = dom0_max_vcpus(); + + dom0 = domain_create(0, &dom0_cfg, true); +-- +2.17.1 + |