From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AF9CA2BE63F for ; Fri, 27 Feb 2026 21:22:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772227329; cv=none; b=mxLP26rp3xdmajmVgzq7K9WrB9N5IUIbidcYWaiwu7+URdrdTJk5G/TOSbMX3iXYOMLohpSmDKs1rE5D0Bj1hr1oV9OiTW//OaCf2pINtftIO2j2lvtiLqkZq77oEIrX3zTL5RPDyXbFjIjZGN4mK/7TLQ2oUrCfqVv/LVCw6Xk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772227329; c=relaxed/simple; bh=lbmOvF2j4H2gM9f9E+jo9GT5XZZz8FGdqwqTpXMG4fI=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=gCVJGnWuVasE7tciFhVaQDGNE+mhYr7cha+21ToQ8t9N5PboYfjOzM2VuGIViV0wwCjH/tUOV/h5BtT2KdjjRK6WY9aK84XnwK4vE1/PfPEvqS3ZRXZ3eaQDbvOFWMv5SZUZKPE4ruxjHx01tgSdoW08ejhkG1pesUU/YQRX8Dc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=AenEIsFC; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="AenEIsFC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D22E0C116C6; Fri, 27 Feb 2026 21:22:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772227329; bh=lbmOvF2j4H2gM9f9E+jo9GT5XZZz8FGdqwqTpXMG4fI=; h=From:To:Cc:Subject:Date:From; b=AenEIsFCWc6WXPcDF5B6PhuzvHPP+0WZOmq0yCR8YrYKZtRKcgmiQY8y1aLEo8aFN CTX3Z5J5eB4kt1QfbDT20nshkL+XgnPnNBX2zymU9dqxSKhzmfvd7WgNbQ5GlQE5mL p7Nxm9CPlIPuD62DZlzdK8da64canH6RPMvx3DS+aAeS67nzSzsFopuAx8PAriw2CX JBjj+PBYolRueSnaWjbdRgQk87H4CEOGaptmUoc3QVd9hOl1H9ukWG7IP5OAfv/UI0 i3es00DaYaEUKGlqhbsTNl1R47d14VKVFNjtmfIFG+D8hzQttU46ODDpPzNtQKvZek szQlCXdVTM+ng== From: Will Deacon To: kvmarm@lists.linux.dev Cc: mark.rutland@arm.com, linux-arm-kernel@lists.infradead.org, Will Deacon , Marc Zyngier , Oliver Upton , James Clark , Leo Yan , Suzuki K Poulose , Fuad Tabba , Alexandru Elisei , Yabin Cui Subject: [PATCH v2 0/3] KVM: arm64: Fix SPE and TRBE nVHE world switch Date: Fri, 27 Feb 2026 21:21:32 +0000 Message-ID: <20260227212136.7660-1-will@kernel.org> X-Mailer: git-send-email 2.47.3 Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi folks, This is version two of the patch that I originally sent here: https://lore.kernel.org/r/20260216130959.19317-1-will@kernel.org Changes since v1 include: * Add missing memory barriers and comments for each step * Work around known CPU errata in TRBE draining / enabling sequences * Fix SPE as well! * Minor clean up to BRBE so that it smells the same as SPE and TRBE As before, I've not been able to test this as-is. Cheers, Will Cc: Marc Zyngier Cc: Oliver Upton Cc: James Clark Cc: Leo Yan Cc: Suzuki K Poulose Cc: Fuad Tabba Cc: Alexandru Elisei Cc: Yabin Cui --->8 Will Deacon (3): KVM: arm64: Disable TRBE Trace Buffer Unit when running in guest context KVM: arm64: Disable SPE Profiling Buffer when running in guest context KVM: arm64: Don't pass host_debug_state to BRBE world-switch routines arch/arm64/include/asm/kvm_host.h | 2 + arch/arm64/kvm/hyp/nvhe/debug-sr.c | 118 +++++++++++++++++++++++------ arch/arm64/kvm/hyp/nvhe/switch.c | 2 +- 3 files changed, 96 insertions(+), 26 deletions(-) -- 2.53.0.473.g4a7958ca14-goog