From patchwork Tue Sep 3 15:38:34 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 13788987 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3AD8CCD3447 for ; Tue, 3 Sep 2024 15:54:50 +0000 (UTC) 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: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=Xut7ScRrSC7DHaOsQpG2iHYyuZeTxQVECYuUOAEPJ/c=; b=vtTX3yLbd+qA2w5CGATaQmHjH7 gTlbwBD2vt7lXW+iUOilxisbjwwl1kBzwpnCL6QsXC5MytyutCNCNBdiDXQDKbcqLBMLFbaWVzoZN f7j3J5RIvvSLg9MZsSPmNXg/yRHe39DSo6LJriT9cnrcC1uwEXjsgH9v1sFXSbW6zhOlFGYbYkGl+ g4qOL780qBnR4Q0QOf90g7gEevETbCldHFwyEZ9CMRHuPM1jIZAYYdzybxq5ZW5C8sYGM/lzrt3Lq gpVPOLH6nvwNi6jpW2ZDLGYmS5jVfTanae765Iy2a2x0BjC8p91AoGO1OYtNZLZbymY1rfGWxI2F4 SOo89Ydw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1slVrd-00000000yDD-3nEg; Tue, 03 Sep 2024 15:54:41 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1slVcE-00000000uJM-20Ux for linux-arm-kernel@lists.infradead.org; Tue, 03 Sep 2024 15:38:49 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id C45FD5C5A27; Tue, 3 Sep 2024 15:38:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A08F4C4CECE; Tue, 3 Sep 2024 15:38:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1725377923; bh=uSYy4/G7+cpYtPVwsLakcewzkxa6RwV1FsQc7LKoyms=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jvU272r1wwDrDWuoK3xnvVQA7d3aMvpWvfSAdyynJTHgZQL8wCzEKkCCOGa9kn7bF kjKEOZKfwLbCs7nhop720zITOlkrOLXpheK12arBJ3eedL0B2XvQbXWSTDkGJOKIne F2VeRHc7aSuily7u0oxScN9z+6Re3Rgcbu8A7mlc9xnoI58c4t+itCGCt4GELTM9AB W1jvKz0ACfJBxl3eERRApGvV8qtPkhQkXB2nQzVGpsMVsv/H1F4tfs/6nCaBN4y6Wt AixDkeT/BDG7q19GTe5J/C58S+ZL4Gr4IWe46onKHkWeHprNMOkJ0iGyM89EBO1upH 8nH8wboFO+sag== Received: from sofa.misterjones.org ([185.219.108.64] helo=valley-girl.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1slVc9-009Hr9-Ub; Tue, 03 Sep 2024 16:38:42 +0100 From: Marc Zyngier To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org Cc: James Morse , Suzuki K Poulose , Oliver Upton , Zenghui Yu , Joey Gouly , Alexandru Elisei , Mark Brown Subject: [PATCH v2 16/16] KVM: arm64: Rely on visibility to let PIR*_ELx/TCR2_ELx UNDEF Date: Tue, 3 Sep 2024 16:38:34 +0100 Message-Id: <20240903153834.1909472-17-maz@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240903153834.1909472-1-maz@kernel.org> References: <20240903153834.1909472-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, james.morse@arm.com, suzuki.poulose@arm.com, oliver.upton@linux.dev, yuzenghui@huawei.com, joey.gouly@arm.com, alexandru.elisei@arm.com, broonie@kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240903_083846_744311_0EF88865 X-CRM114-Status: GOOD ( 11.10 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org With a visibility defined for these registers, there is no need to check again for S1PIE or TCRX being implemented as perform_access() already handles it. Signed-off-by: Marc Zyngier Reviewed-by: Mark Brown --- arch/arm64/kvm/sys_regs.c | 36 +++--------------------------------- 1 file changed, 3 insertions(+), 33 deletions(-) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index bcc7c4c6620f..2783c1d2a13a 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -346,18 +346,6 @@ static bool access_rw(struct kvm_vcpu *vcpu, return true; } -static bool check_s1pie_access_rw(struct kvm_vcpu *vcpu, - struct sys_reg_params *p, - const struct sys_reg_desc *r) -{ - if (!kvm_has_feat(vcpu->kvm, ID_AA64MMFR3_EL1, S1PIE, IMP)) { - kvm_inject_undefined(vcpu); - return false; - } - - return access_rw(vcpu, p, r); -} - /* * See note at ARMv7 ARM B1.14.4 (TL;DR: S/W ops are not easily virtualized). */ @@ -424,12 +412,6 @@ static bool access_vm_reg(struct kvm_vcpu *vcpu, bool was_enabled = vcpu_has_cache_enabled(vcpu); u64 val, mask, shift; - if (reg_to_encoding(r) == SYS_TCR2_EL1 && - !kvm_has_feat(vcpu->kvm, ID_AA64MMFR3_EL1, TCRX, IMP)) { - kvm_inject_undefined(vcpu); - return false; - } - BUG_ON(!p->is_write); get_access_mask(r, &mask, &shift); @@ -448,18 +430,6 @@ static bool access_vm_reg(struct kvm_vcpu *vcpu, return true; } -static bool access_tcr2_el2(struct kvm_vcpu *vcpu, - struct sys_reg_params *p, - const struct sys_reg_desc *r) -{ - if (!kvm_has_feat(vcpu->kvm, ID_AA64MMFR3_EL1, TCRX, IMP)) { - kvm_inject_undefined(vcpu); - return false; - } - - return access_rw(vcpu, p, r); -} - static bool access_actlr(struct kvm_vcpu *vcpu, struct sys_reg_params *p, const struct sys_reg_desc *r) @@ -2865,7 +2835,7 @@ static const struct sys_reg_desc sys_reg_descs[] = { EL2_REG(TTBR0_EL2, access_rw, reset_val, 0), EL2_REG(TTBR1_EL2, access_rw, reset_val, 0), EL2_REG(TCR_EL2, access_rw, reset_val, TCR_EL2_RES1), - EL2_REG_FILTERED(TCR2_EL2, access_tcr2_el2, reset_val, TCR2_EL2_RES1, + EL2_REG_FILTERED(TCR2_EL2, access_rw, reset_val, TCR2_EL2_RES1, tcr2_el2_visibility), EL2_REG_VNCR(VTTBR_EL2, reset_val, 0), EL2_REG_VNCR(VTCR_EL2, reset_val, 0), @@ -2898,9 +2868,9 @@ static const struct sys_reg_desc sys_reg_descs[] = { EL2_REG(HPFAR_EL2, access_rw, reset_val, 0), EL2_REG(MAIR_EL2, access_rw, reset_val, 0), - EL2_REG_FILTERED(PIRE0_EL2, check_s1pie_access_rw, reset_val, 0, + EL2_REG_FILTERED(PIRE0_EL2, access_rw, reset_val, 0, s1pie_el2_visibility), - EL2_REG_FILTERED(PIR_EL2, check_s1pie_access_rw, reset_val, 0, + EL2_REG_FILTERED(PIR_EL2, access_rw, reset_val, 0, s1pie_el2_visibility), EL2_REG(AMAIR_EL2, access_rw, reset_val, 0),