From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=91.218.175.69 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792690695; b=t66XYyRfDymNfscBy1/ykoWXbD0IwoduJF2tY1M3IXmZBKzK35QmMp0G5NjjGgRzevmy YoMfw/gP6O81JoiscVe7FqJcTUw9/BJAzvDXRxuV4xn6wyHIVI+KvvIuRweslMlc5Lwb9 nohhN7vIRbPf7WA30GpY3oWCAeAqLIHuOgfqJh+6MvNH2p3Kn60+I2dxOsRioxS0BZjpY nLe1x8Vay6+RIeRAuleRYfLpq5HX2eCjlb/qRKjbN3o+AkVTuhbmHXCGk001nFLbmKgNt HTLlBCY4Mje+ojVaC0m3HwjmMHMQ9ONSbOrVMrKhr8OnRcU6/bWarKVp3TGarOcodDg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792690695; 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:In-Reply-To:References:MIME-Version:Content-Type: Content-Transfer-Encoding; bh=qp9j90rvNjQEHYpNnURle2G+so6ZY/ayC5ckMBJ47tw=; b=QlR2UGOGoy7GhlJ2zLO6QAPt5t2vTcThBz2UP5RVhoWIhE50CYILwx28N9yEJ1Bhe8y/ Ce9RrwixWA7/yzVqHorrejno1JRNE1zTSiBYP7nZ6e9RRbKFeN3k+H27oQjIpH6DU302o yuP/eDbOMv4I2h2aTzXMgod0peVXnH6zZJaaAZbo/AOKZSJjbxjSa0QbmiJqy8GcX+s/7 +Xpl3wG9lsIWnKJhKHbnxoFixgGFka7FJD2g30fPOf0ZY0czr7mOXt739omGc0ksyjr56 3QvwooUVE6o0hmyeI180G2y8taWmnpXpVtf0F+lrJLr/LGgTkatO3K7IIqNjfzvQXpQ== 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=C2WdeDsy; arc=none smtp.remote-ip=91.218.175.69 Received: from mta0.migadu.com (out-69.mta0.migadu.com [91.218.175.69]) (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 7A682606A31B for ; Thu, 22 Oct 2026 17:38:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 7A682606A31B 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=C2WdeDsy X-Envelope-To: kvmarm@lists.linux.dev DKIM-Signature: a=rsa-sha256; bh=qp9j90rvNjQEHYpNnURle2G+so6ZY/ayC5ckMBJ47tw=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1792690691; v=1; x=1793295491; b=C2WdeDsy/Q6QBr9Xyku5LDGL9KE4sGVWTRGNEc9gDyAjsYyZ4YUmhkHS88MsjykoVJX8Djca Gqa15OEkXcTAbl1j3yCpfYDKA+SMukdL022UmNe2NVngXAcx5trsyFP8HuV4HdiPygEIw71tv99 p6BTAHIKPpfzJTsDz8/+5+2w= X-Envelope-To: kvmarm@lists.linux.dev Received: by smtp.migadu.com with ESMTPS id b2080240adfd05ac; Thu, 22 Oct 2026 17:38:11 +0000 X-Mizu-Trace-ID: b2080240adfd05ac X-Migadu-Flow: FLOW_OUT From: Fuad Tabba To: Vincent Donnefort Cc: maz@kernel.org, oupton@kernel.org, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, joey.gouly@arm.com, seiden@linux.ibm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, catalin.marinas@arm.com, will@kernel.org, kernel-team@android.com, tabba@google.com Subject: Re: [PATCH v2 4/4] KVM: arm64: pkvm: Avoid trapping on HVC_RESET_VECTORS Date: Thu, 22 Oct 2026 18:38:06 +0100 Message-ID: <20261022173806.3752938-1-fuad.tabba@linux.dev> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20261022140048.2522787-5-vdonnefort@google.com> References: <20261022140048.2522787-1-vdonnefort@google.com> <20261022140048.2522787-5-vdonnefort@google.com> X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Hi Vincent, On Thu, 22 Oct 2026 15:00:48 +0100, Vincent Donnefort wrote: > pKVM prevents the reset of the hypervisor vector and as a consequence, > kvm_hyp_initialized can never be reset. Add a fast-path for this case to > skip unnecessary HVCs on the CPU hotplug and PM path. Could you drop this patch? It brings back a pKVM check in the host code, which Marc asked to avoid on v1 [1], to save one HVC that pKVM already rejects. Cheers, /fuad [1] https://lore.kernel.org/all/86jynbyshv.wl-maz@kernel.org/