arm: Remove 32bit KVM host support

That's it. Remove all references to KVM itself, and document
that although it is no more, the ABI between SVC and HYP still
exists.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Vladimir Murzin <vladimir.murzin@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Christoffer Dall <christoffer.dall@arm.com>

1 files changed, 0 insertions, 387 deletions

diff --git a/arch/arm/kvm/guest.c b/arch/arm/kvm/guest.c
deleted file mode 100644
index 9f7ae0d8690f..000000000000
--- a/arch/arm/kvm/guest.c
+++ /dev/null
@@ -1,387 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (C) 2012 - Virtual Open Systems and Columbia University
- * Author: Christoffer Dall <c.dall@virtualopensystems.com>
- */
-
-#include <linux/errno.h>
-#include <linux/err.h>
-#include <linux/kvm_host.h>
-#include <linux/module.h>
-#include <linux/vmalloc.h>
-#include <linux/fs.h>
-#include <kvm/arm_psci.h>
-#include <asm/cputype.h>
-#include <linux/uaccess.h>
-#include <asm/kvm.h>
-#include <asm/kvm_emulate.h>
-#include <asm/kvm_coproc.h>
-
-#define VM_STAT(x) { #x, offsetof(struct kvm, stat.x), KVM_STAT_VM }
-#define VCPU_STAT(x) { #x, offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU }
-
-struct kvm_stats_debugfs_item debugfs_entries[] = {
-	VCPU_STAT(halt_successful_poll),
-	VCPU_STAT(halt_attempted_poll),
-	VCPU_STAT(halt_poll_invalid),
-	VCPU_STAT(halt_wakeup),
-	VCPU_STAT(hvc_exit_stat),
-	VCPU_STAT(wfe_exit_stat),
-	VCPU_STAT(wfi_exit_stat),
-	VCPU_STAT(mmio_exit_user),
-	VCPU_STAT(mmio_exit_kernel),
-	VCPU_STAT(exits),
-	{ NULL }
-};
-
-static u64 core_reg_offset_from_id(u64 id)
-{
-	return id & ~(KVM_REG_ARCH_MASK | KVM_REG_SIZE_MASK | KVM_REG_ARM_CORE);
-}
-
-static int get_core_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
-{
-	u32 __user *uaddr = (u32 __user *)(long)reg->addr;
-	struct kvm_regs *regs = &vcpu->arch.ctxt.gp_regs;
-	u64 off;
-
-	if (KVM_REG_SIZE(reg->id) != 4)
-		return -ENOENT;
-
-	/* Our ID is an index into the kvm_regs struct. */
-	off = core_reg_offset_from_id(reg->id);
-	if (off >= sizeof(*regs) / KVM_REG_SIZE(reg->id))
-		return -ENOENT;
-
-	return put_user(((u32 *)regs)[off], uaddr);
-}
-
-static int set_core_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
-{
-	u32 __user *uaddr = (u32 __user *)(long)reg->addr;
-	struct kvm_regs *regs = &vcpu->arch.ctxt.gp_regs;
-	u64 off, val;
-
-	if (KVM_REG_SIZE(reg->id) != 4)
-		return -ENOENT;
-
-	/* Our ID is an index into the kvm_regs struct. */
-	off = core_reg_offset_from_id(reg->id);
-	if (off >= sizeof(*regs) / KVM_REG_SIZE(reg->id))
-		return -ENOENT;
-
-	if (get_user(val, uaddr) != 0)
-		return -EFAULT;
-
-	if (off == KVM_REG_ARM_CORE_REG(usr_regs.ARM_cpsr)) {
-		unsigned long mode = val & MODE_MASK;
-		switch (mode) {
-		case USR_MODE:
-		case FIQ_MODE:
-		case IRQ_MODE:
-		case SVC_MODE:
-		case ABT_MODE:
-		case UND_MODE:
-			break;
-		default:
-			return -EINVAL;
-		}
-	}
-
-	((u32 *)regs)[off] = val;
-	return 0;
-}
-
-int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
-{
-	return -EINVAL;
-}
-
-int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
-{
-	return -EINVAL;
-}
-
-#define NUM_TIMER_REGS 3
-
-static bool is_timer_reg(u64 index)
-{
-	switch (index) {
-	case KVM_REG_ARM_TIMER_CTL:
-	case KVM_REG_ARM_TIMER_CNT:
-	case KVM_REG_ARM_TIMER_CVAL:
-		return true;
-	}
-	return false;
-}
-
-static int copy_timer_indices(struct kvm_vcpu *vcpu, u64 __user *uindices)
-{
-	if (put_user(KVM_REG_ARM_TIMER_CTL, uindices))
-		return -EFAULT;
-	uindices++;
-	if (put_user(KVM_REG_ARM_TIMER_CNT, uindices))
-		return -EFAULT;
-	uindices++;
-	if (put_user(KVM_REG_ARM_TIMER_CVAL, uindices))
-		return -EFAULT;
-
-	return 0;
-}
-
-static int set_timer_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
-{
-	void __user *uaddr = (void __user *)(long)reg->addr;
-	u64 val;
-	int ret;
-
-	ret = copy_from_user(&val, uaddr, KVM_REG_SIZE(reg->id));
-	if (ret != 0)
-		return -EFAULT;
-
-	return kvm_arm_timer_set_reg(vcpu, reg->id, val);
-}
-
-static int get_timer_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
-{
-	void __user *uaddr = (void __user *)(long)reg->addr;
-	u64 val;
-
-	val = kvm_arm_timer_get_reg(vcpu, reg->id);
-	return copy_to_user(uaddr, &val, KVM_REG_SIZE(reg->id)) ? -EFAULT : 0;
-}
-
-static unsigned long num_core_regs(void)
-{
-	return sizeof(struct kvm_regs) / sizeof(u32);
-}
-
-/**
- * kvm_arm_num_regs - how many registers do we present via KVM_GET_ONE_REG
- *
- * This is for all registers.
- */
-unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu)
-{
-	return num_core_regs() + kvm_arm_num_coproc_regs(vcpu)
-		+ kvm_arm_get_fw_num_regs(vcpu)
-		+ NUM_TIMER_REGS;
-}
-
-/**
- * kvm_arm_copy_reg_indices - get indices of all registers.
- *
- * We do core registers right here, then we append coproc regs.
- */
-int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *uindices)
-{
-	unsigned int i;
-	const u64 core_reg = KVM_REG_ARM | KVM_REG_SIZE_U32 | KVM_REG_ARM_CORE;
-	int ret;
-
-	for (i = 0; i < sizeof(struct kvm_regs)/sizeof(u32); i++) {
-		if (put_user(core_reg | i, uindices))
-			return -EFAULT;
-		uindices++;
-	}
-
-	ret = kvm_arm_copy_fw_reg_indices(vcpu, uindices);
-	if (ret)
-		return ret;
-	uindices += kvm_arm_get_fw_num_regs(vcpu);
-
-	ret = copy_timer_indices(vcpu, uindices);
-	if (ret)
-		return ret;
-	uindices += NUM_TIMER_REGS;
-
-	return kvm_arm_copy_coproc_indices(vcpu, uindices);
-}
-
-int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
-{
-	/* We currently use nothing arch-specific in upper 32 bits */
-	if ((reg->id & ~KVM_REG_SIZE_MASK) >> 32 != KVM_REG_ARM >> 32)
-		return -EINVAL;
-
-	/* Register group 16 means we want a core register. */
-	if ((reg->id & KVM_REG_ARM_COPROC_MASK) == KVM_REG_ARM_CORE)
-		return get_core_reg(vcpu, reg);
-
-	if ((reg->id & KVM_REG_ARM_COPROC_MASK) == KVM_REG_ARM_FW)
-		return kvm_arm_get_fw_reg(vcpu, reg);
-
-	if (is_timer_reg(reg->id))
-		return get_timer_reg(vcpu, reg);
-
-	return kvm_arm_coproc_get_reg(vcpu, reg);
-}
-
-int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
-{
-	/* We currently use nothing arch-specific in upper 32 bits */
-	if ((reg->id & ~KVM_REG_SIZE_MASK) >> 32 != KVM_REG_ARM >> 32)
-		return -EINVAL;
-
-	/* Register group 16 means we set a core register. */
-	if ((reg->id & KVM_REG_ARM_COPROC_MASK) == KVM_REG_ARM_CORE)
-		return set_core_reg(vcpu, reg);
-
-	if ((reg->id & KVM_REG_ARM_COPROC_MASK) == KVM_REG_ARM_FW)
-		return kvm_arm_set_fw_reg(vcpu, reg);
-
-	if (is_timer_reg(reg->id))
-		return set_timer_reg(vcpu, reg);
-
-	return kvm_arm_coproc_set_reg(vcpu, reg);
-}
-
-int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
-				  struct kvm_sregs *sregs)
-{
-	return -EINVAL;
-}
-
-int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
-				  struct kvm_sregs *sregs)
-{
-	return -EINVAL;
-}
-
-
-int __kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu,
-			      struct kvm_vcpu_events *events)
-{
-	events->exception.serror_pending = !!(*vcpu_hcr(vcpu) & HCR_VA);
-
-	/*
-	 * We never return a pending ext_dabt here because we deliver it to
-	 * the virtual CPU directly when setting the event and it's no longer
-	 * 'pending' at this point.
-	 */
-
-	return 0;
-}
-
-int __kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu,
-			      struct kvm_vcpu_events *events)
-{
-	bool serror_pending = events->exception.serror_pending;
-	bool has_esr = events->exception.serror_has_esr;
-	bool ext_dabt_pending = events->exception.ext_dabt_pending;
-
-	if (serror_pending && has_esr)
-		return -EINVAL;
-	else if (serror_pending)
-		kvm_inject_vabt(vcpu);
-
-	if (ext_dabt_pending)
-		kvm_inject_dabt(vcpu, kvm_vcpu_get_hfar(vcpu));
-
-	return 0;
-}
-
-int __attribute_const__ kvm_target_cpu(void)
-{
-	switch (read_cpuid_part()) {
-	case ARM_CPU_PART_CORTEX_A7:
-		return KVM_ARM_TARGET_CORTEX_A7;
-	case ARM_CPU_PART_CORTEX_A15:
-		return KVM_ARM_TARGET_CORTEX_A15;
-	default:
-		return -EINVAL;
-	}
-}
-
-int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init)
-{
-	int target = kvm_target_cpu();
-
-	if (target < 0)
-		return -ENODEV;
-
-	memset(init, 0, sizeof(*init));
-
-	/*
-	 * For now, we don't return any features.
-	 * In future, we might use features to return target
-	 * specific features available for the preferred
-	 * target type.
-	 */
-	init->target = (__u32)target;
-
-	return 0;
-}
-
-int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
-{
-	return -EINVAL;
-}
-
-int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
-{
-	return -EINVAL;
-}
-
-int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
-				  struct kvm_translation *tr)
-{
-	return -EINVAL;
-}
-
-int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
-					struct kvm_guest_debug *dbg)
-{
-	return -EINVAL;
-}
-
-int kvm_arm_vcpu_arch_set_attr(struct kvm_vcpu *vcpu,
-			       struct kvm_device_attr *attr)
-{
-	int ret;
-
-	switch (attr->group) {
-	case KVM_ARM_VCPU_TIMER_CTRL:
-		ret = kvm_arm_timer_set_attr(vcpu, attr);
-		break;
-	default:
-		ret = -ENXIO;
-		break;
-	}
-
-	return ret;
-}
-
-int kvm_arm_vcpu_arch_get_attr(struct kvm_vcpu *vcpu,
-			       struct kvm_device_attr *attr)
-{
-	int ret;
-
-	switch (attr->group) {
-	case KVM_ARM_VCPU_TIMER_CTRL:
-		ret = kvm_arm_timer_get_attr(vcpu, attr);
-		break;
-	default:
-		ret = -ENXIO;
-		break;
-	}
-
-	return ret;
-}
-
-int kvm_arm_vcpu_arch_has_attr(struct kvm_vcpu *vcpu,
-			       struct kvm_device_attr *attr)
-{
-	int ret;
-
-	switch (attr->group) {
-	case KVM_ARM_VCPU_TIMER_CTRL:
-		ret = kvm_arm_timer_has_attr(vcpu, attr);
-		break;
-	default:
-		ret = -ENXIO;
-		break;
-	}
-
-	return ret;
-}