From patchwork Wed Sep 11 13:51:27 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 13800596 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 DC9871A2642; Wed, 11 Sep 2024 13:51:58 +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=1726062718; cv=none; b=WsLq1bv40Q//r5pIRc6qXJ6JSqslBF1/pHPb+ATBgRVczR3Cru9akEn06prNkqdA02/mLUnLjYuwwjAjQGkHKfDVidDxfVJvXXQy5SrsBpdFa50NDwOO23wAeZMwZdQvj/lvjuCGjefmYtygXmkRm2Xeebm0KSw9Lp4fANR6pgs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726062718; c=relaxed/simple; bh=wO+H1x7RpunI39z5g6QQtUvPj7qwwksh4Ah0uJkrFLE=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=Rw/PENJTKz9rz6KWNTY1XM5h00osLZb9b1dGQCcsTRTU0+GNtALYe4R2t6g2sYMkTyXf4gAdglVn0UVwC5CftpN1shEBZFQJusRA6XJyF8ah2NUgqbHlfl4Ld9WNWvxiUshXtlkHlSt0lh6Lw4Nk0UeHsXFrq3sX9ZUuc/bwSg4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PVIAQbyv; 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="PVIAQbyv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8411BC4CEC0; Wed, 11 Sep 2024 13:51:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1726062718; bh=wO+H1x7RpunI39z5g6QQtUvPj7qwwksh4Ah0uJkrFLE=; h=From:To:Cc:Subject:Date:From; b=PVIAQbyvTmBKzZc8GMOcpEMjA1U8Ip58tOgkLvur+UCu0ygdjB74YvSN6CACy1jQf pbKiOr/duVQ7wmo+jNBqrANTjLbcI2lIHZNO8Pn+xYxY+wcg8BOn81FZj/EaizREXr Oi/iQziLKJLbLJOkSXhvGdbzwaI2p3twd9Ta0dwRYX9T1dmo3Nn5uaosuXwTjxROjh bVe3xG62EDcdYoLmY2p1QlS1hWH3V09Sn0xZwo1YsNYF7sEnTo0oHdWPviJyc31Gr2 SymSnLlR7woYJ1zprgqdpF0Tr6YawTCaT1acpEuI7jeD55QteQouLsZq0/IfoYzdxr KXx/gj8OFPJcg== 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 1soNlE-00C7tL-6c; Wed, 11 Sep 2024 14:51:56 +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 v3 00/24] KVM: arm64: Add EL2 support to FEAT_S1PIE Date: Wed, 11 Sep 2024 14:51:27 +0100 Message-Id: <20240911135151.401193-1-maz@kernel.org> X-Mailer: git-send-email 2.39.2 Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 This series serves a few purposes: - Complete the S1PIE support to include EL2 - Sneak in the EL2 system register world switch As mentioned in few of the patches, this implementation relies on a very recent fix to the architecture (D22677 in [0]). * From v2 [2]: - Correctly reprogram the context for AT in the fast path when S1PIE is in use - Generalised sysreg RES0/RES1 masking, and added TCR2_EL2 RES0/RES1 bit handling - Fix TCR2_EL1, PIR_EL1, PIRE0_EL1 access with VHE - Add a bunch of missing registers to get_el2_to_el1_mapping() - Correctly map {TCR2,PIR,PIRE0}_EL2 to their EL1 equivalent on NV - Disable hierarchical permissions when S1PIE is enabled - Make EL2 world switch directly act on the vcpu rather than an arbitrary context - Remove SKL{0,1} from the TCR2_EL2 description * From the initial posting [1]: - Rebased on top of the AT support branch, which is currently sitting in kvmarm/next - Add handling for S1 indirect permission in AT, which I'm sure will give Alexandru another king-sized headache - Picked Mark Brown's series [3] dealing with TCRX and S1PIE visibility, and slapped an extra fix on top for good measure - Picked up RBs from Joey, with thanks. [0] https://developer.arm.com/documentation/102105/ka-04/ [1] https://lore.kernel.org/r/20240813144738.2048302-1-maz@kernel.org [2] https://lore.kernel.org/r/20240903153834.1909472-1-maz@kernel.org [3] https://lore.kernel.org/r/20240822-kvm-arm64-hide-pie-regs-v2-0-376624fa829c@kernel.org Marc Zyngier (21): arm64: Drop SKL0/SKL1 from TCR2_EL2 arm64: Remove VNCR definition for PIRE0_EL2 arm64: Add encoding for PIRE0_EL2 KVM: arm64: nv: Add missing EL2->EL1 mappings in get_el2_to_el1_mapping() KVM: arm64: nv: Handle CNTHCTL_EL2 specially KVM: arm64: nv: Save/Restore vEL2 sysregs KVM: arm64: Correctly access TCR2_EL1, PIR_EL1, PIRE0_EL1 with VHE KVM: arm64: Extend masking facility to arbitrary registers arm64: Define ID_AA64MMFR1_EL1.HAFDBS advertising FEAT_HAFT KVM: arm64: Add TCR2_EL2 to the sysreg arrays KVM: arm64: Sanitise TCR2_EL2 KVM: arm64: Add save/restore for TCR2_EL2 KVM: arm64: Add PIR{,E0}_EL2 to the sysreg arrays KVM: arm64: Add save/restore for PIR{,E0}_EL2 KVM: arm64: Handle PIR{,E0}_EL2 traps KVM: arm64: Sanitise ID_AA64MMFR3_EL1 KVM: arm64: Add AT fast-path support for S1PIE KVM: arm64: Split S1 permission evaluation into direct and hierarchical parts KVM: arm64: Disable hierarchical permissions when S1PIE is enabled KVM: arm64: Implement AT S1PIE support KVM: arm64: Rely on visibility to let PIR*_ELx/TCR2_ELx UNDEF Mark Brown (3): KVM: arm64: Define helper for EL2 registers with custom visibility KVM: arm64: Hide TCR2_EL1 from userspace when disabled for guests KVM: arm64: Hide S1PIE registers from userspace when disabled for guests arch/arm64/include/asm/kvm_host.h | 34 ++- arch/arm64/include/asm/vncr_mapping.h | 1 - arch/arm64/kvm/at.c | 322 +++++++++++++++++---- arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h | 5 +- arch/arm64/kvm/hyp/nvhe/sysreg-sr.c | 2 +- arch/arm64/kvm/hyp/vhe/sysreg-sr.c | 155 +++++++++- arch/arm64/kvm/nested.c | 34 ++- arch/arm64/kvm/sys_regs.c | 129 ++++++++- arch/arm64/tools/sysreg | 8 +- include/kvm/arm_arch_timer.h | 3 + 10 files changed, 597 insertions(+), 96 deletions(-)