From patchwork Mon Jul 18 10:48:18 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vladimir Murzin X-Patchwork-Id: 9234405 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 13A3560756 for ; Mon, 18 Jul 2016 10:54:19 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 025D726C2F for ; Mon, 18 Jul 2016 10:54:19 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E968826C9B; Mon, 18 Jul 2016 10:54:18 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 628C926C2F for ; Mon, 18 Jul 2016 10:54:18 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bP6A0-0007Jn-9S; Mon, 18 Jul 2016 10:52:28 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bP672-0004IE-4l for linux-arm-kernel@lists.infradead.org; Mon, 18 Jul 2016 10:49:34 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9D82CBAD; Mon, 18 Jul 2016 03:49:57 -0700 (PDT) Received: from login1.euhpc.arm.com (login1.euhpc.arm.com [10.6.26.143]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id ED8893F487; Mon, 18 Jul 2016 03:48:47 -0700 (PDT) From: Vladimir Murzin To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu Subject: [PATCH 6/7] ARM: KVM: Get ready to use vgic-v3 Date: Mon, 18 Jul 2016 11:48:18 +0100 Message-Id: <1468838899-34909-7-git-send-email-vladimir.murzin@arm.com> X-Mailer: git-send-email 2.0.0 In-Reply-To: <1468838899-34909-1-git-send-email-vladimir.murzin@arm.com> References: <1468838899-34909-1-git-send-email-vladimir.murzin@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160718_034924_584771_54C6E1D1 X-CRM114-Status: GOOD ( 11.96 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: marc.zyngier@arm.com, andre.przywara@arm.com, christoffer.dall@linaro.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP We need to take care we have everything vgic-v3 expects from us before a quantum leap: - provide required macros via uapi.h - handle access to GICv3 cpu interface from the guest - provide mapping between arm64 version of GICv3 cpu registers and arm's The later is handled via redirection of read{write}_gicreg() and required mainly because 64-bit wide ICH_LR is split in two 32-bit halves (ICH_LR and ICH_LRC) accessed independently. Signed-off-by: Vladimir Murzin --- arch/arm/include/asm/arch_gicv3.h | 64 +++++++++++++++++++++++++++++++++++++ arch/arm/include/asm/kvm_asm.h | 3 ++ arch/arm/include/uapi/asm/kvm.h | 7 ++++ arch/arm/kvm/coproc.c | 36 +++++++++++++++++++++ 4 files changed, 110 insertions(+) diff --git a/arch/arm/include/asm/arch_gicv3.h b/arch/arm/include/asm/arch_gicv3.h index af25c32..f93f6bd 100644 --- a/arch/arm/include/asm/arch_gicv3.h +++ b/arch/arm/include/asm/arch_gicv3.h @@ -96,6 +96,70 @@ #define ICH_AP1R2 __AP1Rx(2) #define ICH_AP1R3 __AP1Rx(3) +/* A32-to-A64 mappings used by VGIC save/restore */ + +#define CPUIF_MAP(a32, a64) \ +static inline void write_ ## a64(u32 val) \ +{ \ + write_sysreg(val, a32); \ +} \ +static inline u32 read_ ## a64(void) \ +{ \ + return read_sysreg(a32); \ +} \ + +#define CPUIF_MAP_LO_HI(a32lo, a32hi, a64) \ +static inline void write_ ## a64(u64 val) \ +{ \ + write_sysreg((u32)val, a32lo); \ + write_sysreg((u32)(val >> 32), a32hi); \ +} \ +static inline u64 read_ ## a64(void) \ +{ \ + u64 val = read_sysreg(a32lo); \ + \ + val |= (u64)read_sysreg(a32hi) << 32; \ + \ + return val; \ +} + +CPUIF_MAP(ICH_HCR, ICH_HCR_EL2) +CPUIF_MAP(ICH_VTR, ICH_VTR_EL2) +CPUIF_MAP(ICH_MISR, ICH_MISR_EL2) +CPUIF_MAP(ICH_EISR, ICH_EISR_EL2) +CPUIF_MAP(ICH_ELSR, ICH_ELSR_EL2) +CPUIF_MAP(ICH_VMCR, ICH_VMCR_EL2) +CPUIF_MAP(ICH_AP0R3, ICH_AP0R3_EL2) +CPUIF_MAP(ICH_AP0R2, ICH_AP0R2_EL2) +CPUIF_MAP(ICH_AP0R1, ICH_AP0R1_EL2) +CPUIF_MAP(ICH_AP0R0, ICH_AP0R0_EL2) +CPUIF_MAP(ICH_AP1R3, ICH_AP1R3_EL2) +CPUIF_MAP(ICH_AP1R2, ICH_AP1R2_EL2) +CPUIF_MAP(ICH_AP1R1, ICH_AP1R1_EL2) +CPUIF_MAP(ICH_AP1R0, ICH_AP1R0_EL2) +CPUIF_MAP(ICC_HSRE, ICC_SRE_EL2) +CPUIF_MAP(ICC_SRE, ICC_SRE_EL1) + +CPUIF_MAP_LO_HI(ICH_LR15, ICH_LRC15, ICH_LR15_EL2) +CPUIF_MAP_LO_HI(ICH_LR14, ICH_LRC14, ICH_LR14_EL2) +CPUIF_MAP_LO_HI(ICH_LR13, ICH_LRC13, ICH_LR13_EL2) +CPUIF_MAP_LO_HI(ICH_LR12, ICH_LRC12, ICH_LR12_EL2) +CPUIF_MAP_LO_HI(ICH_LR11, ICH_LRC11, ICH_LR11_EL2) +CPUIF_MAP_LO_HI(ICH_LR10, ICH_LRC10, ICH_LR10_EL2) +CPUIF_MAP_LO_HI(ICH_LR9, ICH_LRC9, ICH_LR9_EL2) +CPUIF_MAP_LO_HI(ICH_LR8, ICH_LRC8, ICH_LR8_EL2) +CPUIF_MAP_LO_HI(ICH_LR7, ICH_LRC7, ICH_LR7_EL2) +CPUIF_MAP_LO_HI(ICH_LR6, ICH_LRC6, ICH_LR6_EL2) +CPUIF_MAP_LO_HI(ICH_LR5, ICH_LRC5, ICH_LR5_EL2) +CPUIF_MAP_LO_HI(ICH_LR4, ICH_LRC4, ICH_LR4_EL2) +CPUIF_MAP_LO_HI(ICH_LR3, ICH_LRC3, ICH_LR3_EL2) +CPUIF_MAP_LO_HI(ICH_LR2, ICH_LRC2, ICH_LR2_EL2) +CPUIF_MAP_LO_HI(ICH_LR1, ICH_LRC1, ICH_LR1_EL2) +CPUIF_MAP_LO_HI(ICH_LR0, ICH_LRC0, ICH_LR0_EL2) + +#define read_gicreg(r) read_##r() +#define write_gicreg(v, r) write_##r(v) + /* Low-level accessors */ static inline void gic_write_eoir(u32 irq) diff --git a/arch/arm/include/asm/kvm_asm.h b/arch/arm/include/asm/kvm_asm.h index 3d5a5cd..d5dcf00 100644 --- a/arch/arm/include/asm/kvm_asm.h +++ b/arch/arm/include/asm/kvm_asm.h @@ -66,6 +66,9 @@ extern void __kvm_tlb_flush_vmid(struct kvm *kvm); extern int __kvm_vcpu_run(struct kvm_vcpu *vcpu); extern void __init_stage2_translation(void); + +extern u64 __vgic_v3_get_ich_vtr_el2(void); +extern void __vgic_v3_init_lrs(void); #endif #endif /* __ARM_KVM_ASM_H__ */ diff --git a/arch/arm/include/uapi/asm/kvm.h b/arch/arm/include/uapi/asm/kvm.h index df3f60c..55a92b5 100644 --- a/arch/arm/include/uapi/asm/kvm.h +++ b/arch/arm/include/uapi/asm/kvm.h @@ -84,6 +84,13 @@ struct kvm_regs { #define KVM_VGIC_V2_DIST_SIZE 0x1000 #define KVM_VGIC_V2_CPU_SIZE 0x2000 +/* Supported VGICv3 address types */ +#define KVM_VGIC_V3_ADDR_TYPE_DIST 2 +#define KVM_VGIC_V3_ADDR_TYPE_REDIST 3 + +#define KVM_VGIC_V3_DIST_SIZE SZ_64K +#define KVM_VGIC_V3_REDIST_SIZE (2 * SZ_64K) + #define KVM_ARM_VCPU_POWER_OFF 0 /* CPU is started in OFF state */ #define KVM_ARM_VCPU_PSCI_0_2 1 /* CPU uses PSCI v0.2 */ diff --git a/arch/arm/kvm/coproc.c b/arch/arm/kvm/coproc.c index 1bb2b79..10c0244 100644 --- a/arch/arm/kvm/coproc.c +++ b/arch/arm/kvm/coproc.c @@ -228,6 +228,36 @@ bool access_vm_reg(struct kvm_vcpu *vcpu, return true; } +static bool access_gic_sgi(struct kvm_vcpu *vcpu, + const struct coproc_params *p, + const struct coproc_reg *r) +{ + u64 reg; + + if (!p->is_write) + return read_from_write_only(vcpu, p); + + reg = *vcpu_reg(vcpu, p->Rt2); + reg <<= 32; + reg |= *vcpu_reg(vcpu, p->Rt1) ; + + vgic_v3_dispatch_sgi(vcpu, reg); + + return true; +} + +static bool access_gic_sre(struct kvm_vcpu *vcpu, + const struct coproc_params *p, + const struct coproc_reg *r) +{ + if (p->is_write) + return ignore_write(vcpu, p); + + *vcpu_reg(vcpu, p->Rt1) = vcpu->arch.vgic_cpu.vgic_v3.vgic_sre; + + return true; +} + /* * We could trap ID_DFR0 and tell the guest we don't support performance * monitoring. Unfortunately the patch to make the kernel check ID_DFR0 was @@ -361,10 +391,16 @@ static const struct coproc_reg cp15_regs[] = { { CRn(10), CRm( 3), Op1( 0), Op2( 1), is32, access_vm_reg, reset_unknown, c10_AMAIR1}, + /* ICC_SGI1R */ + { CRm64(12), Op1( 0), is64, access_gic_sgi}, + /* VBAR: swapped by interrupt.S. */ { CRn(12), CRm( 0), Op1( 0), Op2( 0), is32, NULL, reset_val, c12_VBAR, 0x00000000 }, + /* ICC_SRE */ + { CRn(12), CRm(12), Op1( 0), Op2(5), is32, access_gic_sre }, + /* CONTEXTIDR/TPIDRURW/TPIDRURO/TPIDRPRW: swapped by interrupt.S. */ { CRn(13), CRm( 0), Op1( 0), Op2( 1), is32, access_vm_reg, reset_val, c13_CID, 0x00000000 },