From nobody Thu Apr 16 15:12:28 2026 X-Original-To: dev-commits-src-branches@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4fxM252NcBz6ZpyZ for ; Thu, 16 Apr 2026 15:12:29 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R12" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4fxM246ff9z4NM9 for ; Thu, 16 Apr 2026 15:12:28 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1776352349; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=LjOZ5SC2AuqfF0SP+BHDdLFT089R/of65jbBvR5zlhc=; b=Ajlqu3gWclHZHzhnjx70x8JF6/rDn6BtHthhodTA9XdIrAKEzdZLrTd7RMz0THqKumMJIC f2+Uh6onKhX119WSoYUYRc+rg7HEjhrNDnh+weQzafAnjjNzfp1LdEe30w6//y8cO8rdDY yl5iImnUGCpOBqhoKNYHeK5gE5NQOHap/bvuoT/R3p40P7leGeq7OBbyXWAdttqYK9wMg/ +zJtHkEXwaffoqR7RW/RyiUpnjYgCOi3kiW/WFb0xUjX2GfDrybSKmnugWKgEG+Lm9uzsy WoODdQYy9+B4X9ibf+TnnAqb8edyyQxofQVcd7l/D2tcu3lXo2/Uq2h+/lxojQ== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1776352349; a=rsa-sha256; cv=none; b=hXR5gAnfndqfItwtwlyBZxZVzYOcN4B04tp000f9ww0LPg4SKmggRd6uz+1Wa2TMmlADVa odfh4rEUIUILkmxyw+R6xrs4hVCONL2AnhCoMybB2Ru/6HRaSIKZOMRgtvfJBK3tAiCRcz cdxOKDjMHqusKO+gFdy5N5JGMW4u4wXhqF2dwSKb+jCTx5Pr4QrVvXspZ3TcmufyxVXpXw oT+iLh8gpVf6S9FpnNq6DUUqhMLBLv16gdnmHDs6txfV2/e7DOLn4Y4C9Gj/GQeTBfg1Nd P9E5Ly101kKjiw7n9dJSonEN1eyz53wDW11vsX2+9lhBc9zNmHaTotGmkcFGqg== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1776352349; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=LjOZ5SC2AuqfF0SP+BHDdLFT089R/of65jbBvR5zlhc=; b=ktHHPZ/gM7DfpM6mxEPVJDZlVoHuZ3gCnQVoaVOA8uuwW4KSmjXebkUxjPEA5jT1q2ddQj 1R649gND1oVVpFO3tCEBhy7119RkS7Wui2BYU5gJZJ7wWMeV5MEpvZy+Xjy76jEC8HwIng +UEigT+EfJ6pi/7Y5zvmCSO9kGwcNqyB4kvnkS+d2M59H2xNtQy1dTpeJ+Y5CGErk1Om78 hcAGsk1wABy+JgyylIO7gPAfiQ4cMiZ0+EACRMBe77xIUx7kgVeprDL9fz0KQeS9mKqPI6 fgG+rvylF82lbxw/T85bGfFCF6roTCzCvPhf0K2LEzXlgEKVQ2LTlxfTln/tmw== Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) by mxrelay.nyi.freebsd.org (Postfix) with ESMTP id 4fxM245mKFz1Bjw for ; Thu, 16 Apr 2026 15:12:28 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from git (uid 1279) (envelope-from git@FreeBSD.org) id 1e0fa by gitrepo.freebsd.org (DragonFly Mail Agent v0.13+ on gitrepo.freebsd.org); Thu, 16 Apr 2026 15:12:28 +0000 To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Colin Percival Subject: git: 7dfe77679c0a - stable/14 - Hyper-V: Detect Extended Destination ID support List-Id: Commits to the stable branches of the FreeBSD src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-branches List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-branches@freebsd.org Sender: owner-dev-commits-src-branches@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: cperciva X-Git-Repository: src X-Git-Refname: refs/heads/stable/14 X-Git-Reftype: branch X-Git-Commit: 7dfe77679c0a15b2fead422b862bd85905311b8f Auto-Submitted: auto-generated Date: Thu, 16 Apr 2026 15:12:28 +0000 Message-Id: <69e0fc5c.1e0fa.664688f0@gitrepo.freebsd.org> The branch stable/14 has been updated by cperciva: URL: https://cgit.FreeBSD.org/src/commit/?id=7dfe77679c0a15b2fead422b862bd85905311b8f commit 7dfe77679c0a15b2fead422b862bd85905311b8f Author: Colin Percival AuthorDate: 2026-02-22 04:09:01 +0000 Commit: Colin Percival CommitDate: 2026-04-16 15:11:55 +0000 Hyper-V: Detect Extended Destination ID support Hyper-V advertises support for the Extended Destination ID standard via bit 2 of the value returned in the EAX register when the hypervisor stack properties are queried via CPUID. This is based on a commit to the Linux kernel, as there does not seem to be any other documentation of this feature. Reviewed by: Souradeep Chakrabarti MFC after: 3 weeks Sponsored by: Amazon Differential Revision: https://reviews.freebsd.org/D55432 (cherry picked from commit 7b6be0014a4eb81943491122bae70914b7fd82b6) --- sys/dev/hyperv/vmbus/x86/hyperv_reg.h | 6 ++++++ sys/x86/x86/local_apic.c | 9 +++++++++ 2 files changed, 15 insertions(+) diff --git a/sys/dev/hyperv/vmbus/x86/hyperv_reg.h b/sys/dev/hyperv/vmbus/x86/hyperv_reg.h index 0597a1fea953..e7560d00f25e 100644 --- a/sys/dev/hyperv/vmbus/x86/hyperv_reg.h +++ b/sys/dev/hyperv/vmbus/x86/hyperv_reg.h @@ -45,4 +45,10 @@ #define CPUID_LEAF_HV_IDENTITY 0x40000002 #define CPUID_LEAF_HV_FEATURES 0x40000003 #define CPUID_LEAF_HV_RECOMMENDS 0x40000004 + +#define CPUID_LEAF_HV_STACK_INTERFACE 0x40000081 +#define HYPERV_STACK_INTERFACE_EAX_SIG 0x31235356 /* "VS#1" */ +#define CPUID_LEAF_HV_STACK_PROPERTIES 0x40000082 +#define HYPERV_PROPERTIES_EXT_DEST_ID 0x00000004 + #endif /* !_HYPERV_REG_H_ */ diff --git a/sys/x86/x86/local_apic.c b/sys/x86/x86/local_apic.c index 4330d0108af6..b9c699965b09 100644 --- a/sys/x86/x86/local_apic.c +++ b/sys/x86/x86/local_apic.c @@ -75,6 +75,7 @@ #include #include #include +#include #ifdef DDB #include @@ -1946,6 +1947,14 @@ detect_extended_dest_id(void) if (regs[0] & XEN_HVM_CPUID_EXT_DEST_ID) apic_ext_dest_id = 1; break; + case VM_GUEST_HV: + cpuid_count(CPUID_LEAF_HV_STACK_INTERFACE, 0, regs); + if (regs[0] != HYPERV_STACK_INTERFACE_EAX_SIG) + break; + cpuid_count(CPUID_LEAF_HV_STACK_PROPERTIES, 0, regs); + if (regs[0] & HYPERV_PROPERTIES_EXT_DEST_ID) + apic_ext_dest_id = 1; + break; case VM_GUEST_KVM: kvm_cpuid_get_features(regs); if (regs[0] & KVM_FEATURE_MSI_EXT_DEST_ID)