From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=91.218.175.182 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793883907; b=q/xIEKU91JhMkFhLat1cbXQdpLUQciFSXXsiUfP8ZeZUyp8xHEJOO3/37ANeY9kpvyoL s8xqWYuQzV1lua/063cHbkJINn6Ie8sRiiezFbNgPO+dz3LSDP9ivJ2w5+uPkBsk2OeRA ORRpM/IjHt7O2SwodiNnpNq3YGsr/Lz7Hr41i4wtN8uS0FrqsND4EYt0EWqnDQ5F0w1QD qDZKhN9Ch9Yj0fpb7vJt+oQzArR/2S/87M5XuINUGtlwapedlKF6aKnUeARu1R+BKkHiJ ctfkdXh1SxyxA+p31goXGereMCJm4ng/BaE97i39zu0jqPFJMLktzvroKDiMvViIn4w== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793883907; h=DMARC-Filter:X-Envelope-To:DKIM-Signature:X-Envelope-To:Received: X-Mizu-Trace-ID:X-Migadu-Flow:From:To:Cc:Subject:Date:Message-ID: X-Mailer:MIME-Version:Content-Transfer-Encoding; bh=ITFZfqTf6HLA8M80Gc6oqzXf0FVpiSw0NR/yGEmW2ls=; b=mIB0ktQDa8CKoZ6wtCJbOgL63N7iP6E6AX0S1E3BBg+kvDbndPbT/ROqx9B1v95iiZcU c4lbdhuJk3ICDz+kCvtHxWcCSSAtZ0G0f1cmpS0mN1RJN5qgluR+7MsT2fmZruBMpUJCF 5i7p1QJ9ZUVv3ojyOP+XdZuJwlV1Y2IT7yyQC2gFwQa5nKrVyoagOea1MHqIbj2XGVbvX WT9pIjgKCZQ+9Cy/l2YOY2TIEULwncelBk3FNTLDVbPs3tHoegZpHMcut9uiRtNzPLcAu EGA1GcmciHfK5l1ELGJFIdJzC6UzHabOuh1LCiJ5peRMHLb2X9KjdNIRcPQt3SoEnFw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=wM8RlSos; arc=none smtp.remote-ip=91.218.175.182 Received: from mta0.migadu.com (out-182.mta0.migadu.com [91.218.175.182]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7C7B8606A32C for ; Thu, 5 Nov 2026 13:05:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 7C7B8606A32C Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=wM8RlSos X-Envelope-To: linux-kernel@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=VlBWOdFHmpR7E9vPrR5lo8vubxtfca2eYX+pam8dCPQ=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1793883904; v=1; x=1794488704; b=wM8RlSosKq28ghg0TCYbcpogXAb2iERutHvUNHnj/hu3/Ne8RjXvPJI/HGB3h+EsExi0+iC+ MfzW/uVvoPv5weMIEggj3mbsOcl61iPxbGqRhTrBNJtEhXMJVDoGxqMM+fa+xVJz1d1VLaa7+Z3 Xx/OP2pqi2F3qDPLyhwAWnB8= X-Envelope-To: linux-kernel@vger.kernel.org Received: by smtp.migadu.com with ESMTPS id 73a9a296ef247332; Thu, 05 Nov 2026 13:05:01 +0000 X-Mizu-Trace-ID: 73a9a296ef247332 X-Migadu-Flow: FLOW_OUT From: Fuad Tabba To: Marc Zyngier , Oliver Upton , kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: Joey Gouly , Suzuki K Poulose , Zenghui Yu , Steffen Eiden , Catalin Marinas , Will Deacon , Mark Rutland , Vincent Donnefort , Fuad Tabba , kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/4] KVM: arm64: Support SVE in protected VMs Date: Thu, 5 Nov 2026 13:04:52 +0000 Message-ID: <20261105130456.1617185-1-fuad.tabba@linux.dev> X-Mailer: git-send-email 2.47.3 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi folks, This series adds SVE support for protected VMs. EL2 allocates a protected vCPU's SVE state from its own heap rather than pinning the host's buffer, so the host never sees the guest's vector registers. It then advertises ID_AA64ZFR0_EL1 to protected VMs, and routes the SVE trap to the lazy FP switch. The first patch is a small tidy-up of the pKVM FP sync code that saves a guest's SVE state. v2 of the pKVM selftests series [1] will add a selftest for this. Based on Linux 7.4-rc1 (6628e7d4c6b25). Cheers, /fuad [1] https://lore.kernel.org/all/20261104084842.132944-1-fuad.tabba@linux.dev/ Fuad Tabba (4): KVM: arm64: Remove redundant kern_hyp_va() calls from the pKVM FP sync KVM: arm64: Allocate a protected vCPU's SVE state at EL2 KVM: arm64: Advertise ID_AA64ZFR0_EL1 to protected VMs KVM: arm64: Allow protected VMs to use SVE Documentation/virt/kvm/arm/pkvm.rst | 6 ++--- arch/arm64/include/asm/kvm_hyp.h | 2 ++ arch/arm64/include/asm/kvm_pkvm.h | 1 + arch/arm64/kvm/arm.c | 1 + arch/arm64/kvm/hyp/nvhe/hyp-main.c | 4 +-- arch/arm64/kvm/hyp/nvhe/pkvm.c | 41 +++++++++++++++++++---------- arch/arm64/kvm/hyp/nvhe/switch.c | 1 + arch/arm64/kvm/hyp/nvhe/sys_regs.c | 22 ++++++++++++++-- arch/arm64/kvm/reset.c | 2 ++ 9 files changed, 59 insertions(+), 21 deletions(-) base-commit: 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4 -- 2.47.3