From mboxrd@z Thu Jan 1 00:00:00 1970 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 132B6C44515 for ; Mon, 20 Jul 2026 13:22:49 +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=jbQDACakTRETryp3VlBQ7FasPGSnCE+jqltMPIJeasw=; b=lvptd6+1CqKhh+uHjn6YsGP/Rv 4jPlKqmmkpbHrcsv8ewbNc/yTRA8o7eHcQWdWVOT3eQoozydhWBLUE/7JlkvB/CBOzwJlYYGrmAip IyInIIec6Cmkc3K4+IB6iOgm5iHB4BBNLgM7fv4JjctURGFTJovUJia5nGc+QRqIOMZ9XaWOAuBLq l+49BNLK4feTG4JEuwKBkVE+ICpIuumlb0PBxVLkrXqEoSO5hFLdOZdBc1bWrWIO+PCtbfNERWS5f upZi0oUS0UHDr3bchwZ4W49n2afMH8+993efum4BC08sQinLRMei2WftvUvM4/CGWx3ubY/UqBA03 73zw/uTA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wlnxC-00000006mof-2EGE; Mon, 20 Jul 2026 13:22:42 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wlnxB-00000006mnt-1cbn for linux-arm-kernel@lists.infradead.org; Mon, 20 Jul 2026 13:22:41 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 14BE243D4C; Mon, 20 Jul 2026 13:22:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EE9441F00ACF; Mon, 20 Jul 2026 13:22:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784553761; bh=jbQDACakTRETryp3VlBQ7FasPGSnCE+jqltMPIJeasw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=nYck7O4kWWxsUSxL58MlrgkK2QNm1fOsMqUghUiVUSK9KCF3J1Sinpr2AEdvLFPhk ytKPGNsGL1f0RXfM+JZNjJcx+SIRdA+x4akjyw93/GerLM//BZ5K/MXe53vhZEm3lr q+a2y+wx9akzVDAm5vOq7MvD5U62C42Je6NLzwo/04OMdZmtUDLRLl5eIQztAQfCIZ rIHQBjCCiNvsqOdkUMJG+r0weTgFWyOAbCbnt1NHei3I++h0DqKKAV/B4SMZs1r0S8 OsqjEf9chwrw1IxuBfSfB2ou3eoVE1SZF0fxgxxO1pvmzG0W7ToFJfCWpeG/MN+Up2 tONl6H51zIRUw== 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 4.98.2) (envelope-from ) id 1wlnx9-00000006oKK-1El7; Mon, 20 Jul 2026 13:22:39 +0000 From: Marc Zyngier To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: Steffen Eiden , Joey Gouly , Suzuki K Poulose , Oliver Upton , Zenghui Yu Subject: [PATCH 3/5] KVM: arm64: Convert most ICH_VTR_EL2 accesses to inlined literal value Date: Mon, 20 Jul 2026 14:22:18 +0100 Message-ID: <20260720132220.2143486-5-maz@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260720132220.2143486-1-maz@kernel.org> References: <20260720132220.2143486-1-maz@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, seiden@linux.ibm.com, joey.gouly@arm.com, suzuki.poulose@arm.com, oupton@kernel.org, yuzenghui@huawei.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false 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 Now that we have a new helper that inlines the value of ICH_VTR_EL2 into the code, use this to replace most of the sysreg accesses to that register. This avoids a lot of traps when running KVM under NV. Signed-off-by: Marc Zyngier --- arch/arm64/kvm/hyp/vgic-v3-sr.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/arch/arm64/kvm/hyp/vgic-v3-sr.c b/arch/arm64/kvm/hyp/vgic-v3-sr.c index 8da7a40ced58a..3e5d5ddf35a19 100644 --- a/arch/arm64/kvm/hyp/vgic-v3-sr.c +++ b/arch/arm64/kvm/hyp/vgic-v3-sr.c @@ -367,7 +367,7 @@ void __vgic_v3_save_aprs(struct vgic_v3_cpu_if *cpu_if) u64 val; u32 nr_pre_bits; - val = read_gicreg(ICH_VTR_EL2); + val = vgic_ich_vtr(); nr_pre_bits = vtr_to_nr_pre_bits(val); switch (nr_pre_bits) { @@ -400,7 +400,7 @@ static void __vgic_v3_restore_aprs(struct vgic_v3_cpu_if *cpu_if) u64 val; u32 nr_pre_bits; - val = read_gicreg(ICH_VTR_EL2); + val = vgic_ich_vtr(); nr_pre_bits = vtr_to_nr_pre_bits(val); switch (nr_pre_bits) { @@ -430,7 +430,7 @@ static void __vgic_v3_restore_aprs(struct vgic_v3_cpu_if *cpu_if) void __vgic_v3_init_lrs(void) { - int max_lr_idx = vtr_to_max_lr_idx(read_gicreg(ICH_VTR_EL2)); + int max_lr_idx = vtr_to_max_lr_idx(vgic_ich_vtr()); int i; for (i = 0; i <= max_lr_idx; i++) @@ -455,7 +455,7 @@ u64 __vgic_v3_get_gic_config(void) * system, so we first check if we have GICv5 support. */ if (cpus_have_final_cap(ARM64_HAS_GICV5_CPUIF)) - return read_gicreg(ICH_VTR_EL2); + return vgic_ich_vtr(); sre = read_gicreg(ICC_SRE_EL1); /* @@ -498,7 +498,7 @@ u64 __vgic_v3_get_gic_config(void) } val = (val & ICC_SRE_EL1_SRE) ? 0 : (1ULL << 63); - val |= read_gicreg(ICH_VTR_EL2); + val |= vgic_ich_vtr(); return val; } @@ -540,7 +540,7 @@ void __vgic_v3_restore_vmcr_aprs(struct vgic_v3_cpu_if *cpu_if) static int __vgic_v3_bpr_min(void) { /* See Pseudocode for VPriorityGroup */ - return 8 - vtr_to_nr_pre_bits(read_gicreg(ICH_VTR_EL2)); + return 8 - vtr_to_nr_pre_bits(vgic_ich_vtr()); } static int __vgic_v3_get_group(struct kvm_vcpu *vcpu) @@ -614,7 +614,7 @@ static int __vgic_v3_find_active_lr(struct kvm_vcpu *vcpu, int intid, static int __vgic_v3_get_highest_active_priority(void) { - u8 nr_apr_regs = vtr_to_nr_apr_regs(read_gicreg(ICH_VTR_EL2)); + u8 nr_apr_regs = vtr_to_nr_apr_regs(vgic_ich_vtr()); u32 hap = 0; int i; @@ -707,7 +707,7 @@ static void __vgic_v3_set_active_priority(u8 pri, u32 vmcr, int grp) static int __vgic_v3_clear_highest_active_priority(void) { - u8 nr_apr_regs = vtr_to_nr_apr_regs(read_gicreg(ICH_VTR_EL2)); + u8 nr_apr_regs = vtr_to_nr_apr_regs(vgic_ich_vtr()); u32 hap = 0; int i; @@ -1039,7 +1039,7 @@ static void __vgic_v3_read_ctlr(struct kvm_vcpu *vcpu, u32 vmcr, int rt) { u32 vtr, val; - vtr = read_gicreg(ICH_VTR_EL2); + vtr = vgic_ich_vtr(); /* PRIbits */ val = ((vtr >> 29) & 7) << ICC_CTLR_EL1_PRI_BITS_SHIFT; /* IDbits */ -- 2.47.3