As promised, this is the first RFC patch set for arm64 SDEI support. Key points: - We propose to only support kvm enabled arm64 virtual machines, for non-kvm VMs can emulate EL3 and have Trusted Firmware run on it, which has a builtin SDEI dispatcher. - New kvm capability KVM_CAP_FORWARD_HYPERCALL is added to probe if kvm supports forwarding hypercalls, and the capability should be enabled explicitly. PSCI can be set as exception for backward compatibility. - We make the dispatcher as a logical device, to save the states during migration or save/restore operation; only one instance is allowed in one VM. - We use qemu_irq as the bridge for other qemu modules to switch from irq injection to SDEI event trigger after VM binds the interrupt to SDEI event. We use qemu_irq_intercept_in() to override qemu_irq handler with SDEI event trigger, and a new interface qemu_irq_remove_intercept() is added to restore the handler to default one (i.e. ARM GIC). More details are in the commit message of each patch. Basic tests are done by emulating a watchdog timer and triggering SDEI event in every 10s. As this is the first rough RFC, please focus on the interfaces and framework first. We can refine the code for several rounds after the big things have been determined. Please give your comments and suggestions. Thanks, HG Cc: Peter Maydell <peter.maydell@xxxxxxxxxx> Cc: Dave Martin <Dave.Martin@xxxxxxx> Cc: Marc Zyngier <marc.zyngier@xxxxxxx> Cc: Mark Rutland <mark.rutland@xxxxxxx> Cc: James Morse <james.morse@xxxxxxx> Heyi Guo (12): linux-headers: import arm_sdei.h arm/sdei: add virtual device framework arm/sdei: add support to handle SDEI requests from guest arm/sdei: add system reset callback arm/sdei: add support to trigger event by GIC interrupt ID core/irq: add qemu_irq_remove_intercept interface arm/sdei: override qemu_irq handler when binding interrupt arm/sdei: add support to register interrupt bind notifier linux-headers/kvm.h: add capability to forward hypercall arm/sdei: check KVM cap and enable SDEI arm/kvm: handle guest exit of hypercall virt/acpi: add SDEI table if SDEI is enabled hw/arm/virt-acpi-build.c | 16 + hw/core/irq.c | 11 + include/hw/acpi/acpi-defs.h | 5 + include/hw/irq.h | 8 +- linux-headers/linux/arm_sdei.h | 73 ++ linux-headers/linux/kvm.h | 3 + target/arm/Makefile.objs | 1 + target/arm/kvm.c | 17 + target/arm/sdei.c | 1518 ++++++++++++++++++++++++++++++++++++++++ target/arm/sdei.h | 60 ++ target/arm/sdei_int.h | 109 +++ 11 files changed, 1819 insertions(+), 2 deletions(-) create mode 100644 linux-headers/linux/arm_sdei.h create mode 100644 target/arm/sdei.c create mode 100644 target/arm/sdei.h create mode 100644 target/arm/sdei_int.h -- 1.8.3.1 _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
