From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 61DF2606A31B for ; Thu, 22 Oct 2026 17:38:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=Ht41tyW0; dkim=pass (1024-bit key, unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=C2WdeDsy DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc: To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Unsubscribe-Post: List-Owner; bh=qp9j90rvNjQEHYpNnURle2G+so6ZY/ayC5ckMBJ47tw=; b=Ht41tyW0V5y8bm sX04CEp9IeqFIQDrHKYCj8yKiuvnkwm3W7cUJPBndcBGprZ9IggpX6k63cTLqJZIxfUdQpE7UyBy9 Vk673u9T4DwyudlYU1nPcVVzPrgZufVVsk+ZAtRyxQ/r6iDK8MPMVwZJobH3Epcg3gGLhAA9hLVEF lGY0X9W4BEM/yy8Am3iMVkcAXP8n+vqYUFqPBX2fGexRcZyrsnpcwscMfqfpaLm8GFSO2iQGFP54K Ak7tuGh05zDzUbqDKJq6DElDGh6M0nPoFYezZjAx7BinnGoT6vpGEjXa++IqXLoCLKirhFYQ+xOV6 H2RD2LZ5vksQLN6RYUJg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xJwk7-0000000Eb7Y-18V1; Thu, 22 Oct 2026 17:38:19 +0000 Received: from out-159.mta0.migadu.com ([2001:41d0:1004:224b::9f] helo=mta0.migadu.com) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xJwk3-0000000Eb6m-3Pct for linux-arm-kernel@lists.infradead.org; Thu, 22 Oct 2026 17:38:17 +0000 X-Envelope-To: linux-arm-kernel@lists.infradead.org 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: linux-arm-kernel@lists.infradead.org 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-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261022_103815_986173_9BB7F47D X-CRM114-Status: UNSURE ( 7.30 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.1 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-8.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 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/