From b1c3497e604ddccea5af4071831ed0e4680fb35e Mon Sep 17 00:00:00 2001 From: Jane Malalane Date: Fri, 29 Jul 2022 08:04:16 +0100 Subject: x86/xen: Add support for HVMOP_set_evtchn_upcall_vector MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Implement support for the HVMOP_set_evtchn_upcall_vector hypercall in order to set the per-vCPU event channel vector callback on Linux and use it in preference of HVM_PARAM_CALLBACK_IRQ. If the per-VCPU vector setup is successful on BSP, use this method for the APs. If not, fallback to the global vector-type callback. Also register callback_irq at per-vCPU event channel setup to trick toolstack to think the domain is enlightened. Suggested-by: "Roger Pau Monné" Signed-off-by: Jane Malalane Reviewed-by: Boris Ostrovsky Link: https://lore.kernel.org/r/20220729070416.23306-1-jane.malalane@citrix.com Signed-off-by: Juergen Gross --- arch/x86/include/asm/xen/cpuid.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/x86/include/asm/xen/cpuid.h') diff --git a/arch/x86/include/asm/xen/cpuid.h b/arch/x86/include/asm/xen/cpuid.h index 78e667a31d6c..6daa9b0c8d11 100644 --- a/arch/x86/include/asm/xen/cpuid.h +++ b/arch/x86/include/asm/xen/cpuid.h @@ -107,6 +107,8 @@ * ID field from 8 to 15 bits, allowing to target APIC IDs up 32768. */ #define XEN_HVM_CPUID_EXT_DEST_ID (1u << 5) +/* Per-vCPU event channel upcalls */ +#define XEN_HVM_CPUID_UPCALL_VECTOR (1u << 6) /* * Leaf 6 (0x40000x05) -- cgit