From 622d68772ddf07573cf88e833afe8ba6c70ac748 Mon Sep 17 00:00:00 2001 From: "Anirudh Rayabharam (Microsoft)" Date: Wed, 25 Feb 2026 12:44:03 +0000 Subject: mshv: add arm64 support for doorbell & intercept SINTs On x86, the HYPERVISOR_CALLBACK_VECTOR is used to receive synthetic interrupts (SINTs) from the hypervisor for doorbells and intercepts. There is no such vector reserved for arm64. On arm64, the hypervisor exposes a synthetic register that can be read to find the INTID that should be used for SINTs. This INTID is in the PPI range. To better unify the code paths, introduce mshv_sint_vector_init() that either reads the synthetic register and obtains the INTID (arm64) or just uses HYPERVISOR_CALLBACK_VECTOR as the interrupt vector (x86). Reviewed-by: Michael Kelley Reviewed-by: Stanislav Kinsburskii Signed-off-by: Anirudh Rayabharam (Microsoft) Signed-off-by: Wei Liu --- include/hyperv/hvgdk_mini.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/hyperv') diff --git a/include/hyperv/hvgdk_mini.h b/include/hyperv/hvgdk_mini.h index 056ef7b6b360..8bb3dd71c5b4 100644 --- a/include/hyperv/hvgdk_mini.h +++ b/include/hyperv/hvgdk_mini.h @@ -1121,6 +1121,8 @@ enum hv_register_name { HV_X64_REGISTER_MSR_MTRR_FIX4KF8000 = 0x0008007A, HV_X64_REGISTER_REG_PAGE = 0x0009001C, +#elif defined(CONFIG_ARM64) + HV_ARM64_REGISTER_SINT_RESERVED_INTERRUPT_ID = 0x00070001, #endif }; -- cgit v1.2.3