On Sat, May 18, 2013 at 06:54:26AM -0700, Sanjay Lal wrote:
> From: David Daney <david.da...@cavium.com>
>
> There are several parts to this:
>
> o All registers are 64-bits wide, 32-bit guests use the least
> significant portion of the register storage fields.
>
> o FPU register formats are defined.
>
> o CP0 Registers are manipulated via the KVM_GET_MSRS/KVM_SET_MSRS
> mechanism.
>
> The vcpu_ioctl_get_regs and vcpu_ioctl_set_regs function pointers
> become unused so they were removed.
>
> Some IOCTL functions were moved to kvm_trap_emul because the
> implementations are only for that flavor of KVM host. In the future, if
> hardware based virtualization is added, they can be hidden behind
> function pointers as appropriate.
>
David, can you please divide this one big patch to smaller patches
with each one having only one of the changes listed above?
> Signed-off-by: David Daney <david.da...@cavium.com>
> Signed-off-by: Sanjay Lal <sanj...@kymasys.com>
> ---
> arch/mips/include/asm/kvm_host.h | 4 -
> arch/mips/include/uapi/asm/kvm.h | 106 ++++++++++---
> arch/mips/kvm/kvm_mips.c | 102 +-----------
> arch/mips/kvm/kvm_trap_emul.c | 330
> ++++++++++++++++++++++++++++++++++-----
> 4 files changed, 382 insertions(+), 160 deletions(-)
>
> diff --git a/arch/mips/include/asm/kvm_host.h
> b/arch/mips/include/asm/kvm_host.h
> index e68781e..e3d49ec 100644
> --- a/arch/mips/include/asm/kvm_host.h
> +++ b/arch/mips/include/asm/kvm_host.h
> @@ -496,10 +496,6 @@ struct kvm_mips_callbacks {
> uint32_t cause);
> int (*irq_clear) (struct kvm_vcpu *vcpu, unsigned int priority,
> uint32_t cause);
> - int (*vcpu_ioctl_get_regs) (struct kvm_vcpu *vcpu,
> - struct kvm_regs *regs);
> - int (*vcpu_ioctl_set_regs) (struct kvm_vcpu *vcpu,
> - struct kvm_regs *regs);
> };
> extern struct kvm_mips_callbacks *kvm_mips_callbacks;
> int kvm_mips_emulation_init(struct kvm_mips_callbacks **install_callbacks);
> diff --git a/arch/mips/include/uapi/asm/kvm.h
> b/arch/mips/include/uapi/asm/kvm.h
> index 85789ea..83c44d8 100644
> --- a/arch/mips/include/uapi/asm/kvm.h
> +++ b/arch/mips/include/uapi/asm/kvm.h
> @@ -1,55 +1,113 @@
> /*
> -* This file is subject to the terms and conditions of the GNU General Public
> -* License. See the file "COPYING" in the main directory of this archive
> -* for more details.
> -*
> -* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
> -* Authors: Sanjay Lal <sanj...@kymasys.com>
> -*/
> + * This file is subject to the terms and conditions of the GNU General Public
> + * License. See the file "COPYING" in the main directory of this archive
> + * for more details.
> + *
> + * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
> + * Copyright (C) 2013 Cavium, Inc.
> + * Authors: Sanjay Lal <sanj...@kymasys.com>
> + */
>
> #ifndef __LINUX_KVM_MIPS_H
> #define __LINUX_KVM_MIPS_H
>
> #include <linux/types.h>
>
> -#define __KVM_MIPS
> -
> -#define N_MIPS_COPROC_REGS 32
> -#define N_MIPS_COPROC_SEL 8
> +/*
> + * KVM MIPS specific structures and definitions.
> + *
> + * Some parts derived from the x86 version of this file.
> + */
>
> /* for KVM_GET_REGS and KVM_SET_REGS */
> +/*
> + * If Config[AT] is zero (32-bit CPU), the register contents are
> + * stored in the lower 32-bits of the struct kvm_regs fields and sign
> + * extended to 64-bits.
> + */
> struct kvm_regs {
> - __u32 gprs[32];
> - __u32 hi;
> - __u32 lo;
> - __u32 pc;
> + /* out (KVM_GET_REGS) / in (KVM_SET_REGS) */
> + __u64 gpr[32];
> + __u64 hi, lo;
> + __u64 pc;
> +};
>
> - __u32 cp0reg[N_MIPS_COPROC_REGS][N_MIPS_COPROC_SEL];
> +/* for KVM_GET_FPU and KVM_SET_FPU */
> +/*
> + * If Status[FR] is zero (32-bit FPU), the upper 32-bits of the FPRs
> + * are zero filled.
> + */
> +struct kvm_fpu {
> + __u64 fpr[32];
> + __u32 fir;
> + __u32 fccr;
> + __u32 fexr;
> + __u32 fenr;
> + __u32 fcsr;
> + __u32 pad;
> };
>
> -/* for KVM_GET_SREGS and KVM_SET_SREGS */
> -struct kvm_sregs {
> +
> +/*
> + * For MIPS, we use the same APIs as x86, where 'msr' corresponds to a
> + * CP0 register. The index field is broken down as follows:
> + *
> + * bits[2..0] - Register 'sel' index.
> + * bits[7..3] - Register 'rd' index.
> + * bits[15..8] - Must be zero.
> + * bits[31..16] - 0 -> CP0 registers.
> + *
> + * Other sets registers may be added in the future. Each set would
> + * have its own identifier in bits[31..16].
> + *
> + * For MSRs that are narrower than 64-bits, the value is stored in the
> + * low order bits of the data field, and sign extended to 64-bits.
> + */
> +#define KVM_MIPS_MSR_CP0 0
> +struct kvm_msr_entry {
> + __u32 index;
> + __u32 reserved;
> + __u64 data;
> };
>
> -/* for KVM_GET_FPU and KVM_SET_FPU */
> -struct kvm_fpu {
> +/* for KVM_GET_MSRS and KVM_SET_MSRS */
> +struct kvm_msrs {
> + __u32 nmsrs; /* number of msrs in entries */
> + __u32 pad;
> +
> + struct kvm_msr_entry entries[0];
> };
>
> +/* for KVM_GET_MSR_INDEX_LIST */
> +struct kvm_msr_list {
> + __u32 nmsrs; /* number of msrs in entries */
> + __u32 indices[0];
> +};
> +
> +/*
> + * KVM MIPS specific structures and definitions
> + *
> + */
> struct kvm_debug_exit_arch {
> + __u64 epc;
> };
>
> /* for KVM_SET_GUEST_DEBUG */
> struct kvm_guest_debug_arch {
> };
>
> +/* definition of registers in kvm_run */
> +struct kvm_sync_regs {
> +};
> +
> +/* dummy definition */
> +struct kvm_sregs {
> +};
> +
> struct kvm_mips_interrupt {
> /* in */
> __u32 cpu;
> __u32 irq;
> };
>
> -/* definition of registers in kvm_run */
> -struct kvm_sync_regs {
> -};
> -
> #endif /* __LINUX_KVM_MIPS_H */
> diff --git a/arch/mips/kvm/kvm_mips.c b/arch/mips/kvm/kvm_mips.c
> index e0dad02..26a40e3 100644
> --- a/arch/mips/kvm/kvm_mips.c
> +++ b/arch/mips/kvm/kvm_mips.c
> @@ -51,16 +51,6 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
> {NULL}
> };
>
> -static int kvm_mips_reset_vcpu(struct kvm_vcpu *vcpu)
> -{
> - int i;
> - for_each_possible_cpu(i) {
> - vcpu->arch.guest_kernel_asid[i] = 0;
> - vcpu->arch.guest_user_asid[i] = 0;
> - }
> - return 0;
> -}
> -
> gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
> {
> return gfn;
> @@ -192,12 +182,6 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
> }
> }
>
> -long
> -kvm_arch_dev_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
> -{
> - return -EINVAL;
> -}
> -
> void kvm_arch_free_memslot(struct kvm_memory_slot *free,
> struct kvm_memory_slot *dont)
> {
> @@ -435,42 +419,6 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu,
> struct kvm_run *run)
>
> return r;
> }
> -
> -int
> -kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_mips_interrupt
> *irq)
> -{
> - int intr = (int)irq->irq;
> - struct kvm_vcpu *dvcpu = NULL;
> -
> - if (intr == 3 || intr == -3 || intr == 4 || intr == -4)
> - kvm_debug("%s: CPU: %d, INTR: %d\n", __func__, irq->cpu,
> - (int)intr);
> -
> - if (irq->cpu == -1)
> - dvcpu = vcpu;
> - else
> - dvcpu = vcpu->kvm->vcpus[irq->cpu];
> -
> - if (intr == 2 || intr == 3 || intr == 4) {
> - kvm_mips_callbacks->queue_io_int(dvcpu, irq);
> -
> - } else if (intr == -2 || intr == -3 || intr == -4) {
> - kvm_mips_callbacks->dequeue_io_int(dvcpu, irq);
> - } else {
> - kvm_err("%s: invalid interrupt ioctl (%d:%d)\n", __func__,
> - irq->cpu, irq->irq);
> - return -EINVAL;
> - }
> -
> - dvcpu->arch.wait = 0;
> -
> - if (waitqueue_active(&dvcpu->wq)) {
> - wake_up_interruptible(&dvcpu->wq);
> - }
> -
> - return 0;
> -}
> -
> int
> kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
> struct kvm_mp_state *mp_state)
> @@ -485,42 +433,6 @@ kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
> return -EINVAL;
> }
>
> -long
> -kvm_arch_vcpu_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
> -{
> - struct kvm_vcpu *vcpu = filp->private_data;
> - void __user *argp = (void __user *)arg;
> - long r;
> - int intr;
> -
> - switch (ioctl) {
> - case KVM_NMI:
> - /* Treat the NMI as a CPU reset */
> - r = kvm_mips_reset_vcpu(vcpu);
> - break;
> - case KVM_INTERRUPT:
> - {
> - struct kvm_mips_interrupt irq;
> - r = -EFAULT;
> - if (copy_from_user(&irq, argp, sizeof(irq)))
> - goto out;
> -
> - intr = (int)irq.irq;
> -
> - kvm_debug("[%d] %s: irq: %d\n", vcpu->vcpu_id, __func__,
> - irq.irq);
> -
> - r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
> - break;
> - }
> - default:
> - r = -EINVAL;
> - }
> -
> -out:
> - return r;
> -}
> -
> /*
> * Get (and clear) the dirty memory log for a memory slot.
> */
> @@ -677,28 +589,28 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu,
> struct kvm_regs *regs)
> {
> int i;
>
> - for (i = 0; i < 32; i++)
> - vcpu->arch.gprs[i] = regs->gprs[i];
> -
> + for (i = 1; i < ARRAY_SIZE(vcpu->arch.gprs); i++)
> + vcpu->arch.gprs[i] = regs->gpr[i];
> + vcpu->arch.gprs[0] = 0; /* zero is special, and cannot be set. */
> vcpu->arch.hi = regs->hi;
> vcpu->arch.lo = regs->lo;
> vcpu->arch.pc = regs->pc;
>
> - return kvm_mips_callbacks->vcpu_ioctl_set_regs(vcpu, regs);
> + return 0;
> }
>
> int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs
> *regs)
> {
> int i;
>
> - for (i = 0; i < 32; i++)
> - regs->gprs[i] = vcpu->arch.gprs[i];
> + for (i = 0; i < ARRAY_SIZE(vcpu->arch.gprs); i++)
> + regs->gpr[i] = vcpu->arch.gprs[i];
>
> regs->hi = vcpu->arch.hi;
> regs->lo = vcpu->arch.lo;
> regs->pc = vcpu->arch.pc;
>
> - return kvm_mips_callbacks->vcpu_ioctl_get_regs(vcpu, regs);
> + return 0;
> }
>
> void kvm_mips_comparecount_func(unsigned long data)
> diff --git a/arch/mips/kvm/kvm_trap_emul.c b/arch/mips/kvm/kvm_trap_emul.c
> index 466aeef..df98dcb 100644
> --- a/arch/mips/kvm/kvm_trap_emul.c
> +++ b/arch/mips/kvm/kvm_trap_emul.c
> @@ -13,7 +13,7 @@
> #include <linux/err.h>
> #include <linux/module.h>
> #include <linux/vmalloc.h>
> -
> +#include <linux/fs.h>
> #include <linux/kvm_host.h>
>
> #include "kvm_mips_opcode.h"
> @@ -345,54 +345,312 @@ static int kvm_trap_emul_handle_break(struct kvm_vcpu
> *vcpu)
> return ret;
> }
>
> -static int
> -kvm_trap_emul_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
> +#define MSR_MIPS_CP0_INDEX (8 * 0 + 0)
> +#define MSR_MIPS_CP0_ENTRYLO0 (8 * 2 + 0)
> +#define MSR_MIPS_CP0_ENTRYLO1 (8 * 3 + 0)
> +#define MSR_MIPS_CP0_CONTEXT (8 * 4 + 0)
> +#define MSR_MIPS_CP0_USERLOCAL (8 * 4 + 2)
> +#define MSR_MIPS_CP0_PAGEMASK (8 * 5 + 0)
> +#define MSR_MIPS_CP0_PAGEGRAIN (8 * 5 + 1)
> +#define MSR_MIPS_CP0_WIRED (8 * 6 + 0)
> +#define MSR_MIPS_CP0_HWRENA (8 * 7 + 0)
> +#define MSR_MIPS_CP0_BADVADDR (8 * 8 + 0)
> +#define MSR_MIPS_CP0_COUNT (8 * 9 + 0)
> +#define MSR_MIPS_CP0_ENTRYHI (8 * 10 + 0)
> +#define MSR_MIPS_CP0_COMPARE (8 * 11 + 0)
> +#define MSR_MIPS_CP0_STATUS (8 * 12 + 0)
> +#define MSR_MIPS_CP0_CAUSE (8 * 13 + 0)
> +#define MSR_MIPS_CP0_EBASE (8 * 15 + 1)
> +#define MSR_MIPS_CP0_CONFIG (8 * 16 + 0)
> +#define MSR_MIPS_CP0_CONFIG1 (8 * 16 + 1)
> +#define MSR_MIPS_CP0_CONFIG2 (8 * 16 + 2)
> +#define MSR_MIPS_CP0_CONFIG3 (8 * 16 + 3)
> +#define MSR_MIPS_CP0_CONFIG7 (8 * 16 + 7)
> +#define MSR_MIPS_CP0_XCONTEXT (8 * 20 + 0)
> +#define MSR_MIPS_CP0_ERROREPC (8 * 30 + 0)
> +
> +static u32 msrs_to_save[] = {
> + MSR_MIPS_CP0_INDEX,
> + MSR_MIPS_CP0_CONTEXT,
> + MSR_MIPS_CP0_PAGEMASK,
> + MSR_MIPS_CP0_WIRED,
> + MSR_MIPS_CP0_BADVADDR,
> + MSR_MIPS_CP0_ENTRYHI,
> + MSR_MIPS_CP0_STATUS,
> + MSR_MIPS_CP0_CAUSE,
> + /* EPC set via kvm_regs, et al. */
> + MSR_MIPS_CP0_CONFIG,
> + MSR_MIPS_CP0_CONFIG1,
> + MSR_MIPS_CP0_CONFIG2,
> + MSR_MIPS_CP0_CONFIG3,
> + MSR_MIPS_CP0_CONFIG7,
> + MSR_MIPS_CP0_XCONTEXT,
> + MSR_MIPS_CP0_ERROREPC
> +};
> +
> +#define MAX_IO_MSRS 128
> +
> +static int mipsvz_get_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
> {
> struct mips_coproc *cop0 = vcpu->arch.cop0;
> + s64 v;
>
> - kvm_write_c0_guest_index(cop0, regs->cp0reg[MIPS_CP0_TLB_INDEX][0]);
> - kvm_write_c0_guest_context(cop0, regs->cp0reg[MIPS_CP0_TLB_CONTEXT][0]);
> - kvm_write_c0_guest_badvaddr(cop0, regs->cp0reg[MIPS_CP0_BAD_VADDR][0]);
> - kvm_write_c0_guest_entryhi(cop0, regs->cp0reg[MIPS_CP0_TLB_HI][0]);
> - kvm_write_c0_guest_epc(cop0, regs->cp0reg[MIPS_CP0_EXC_PC][0]);
> + switch (index) {
> + case MSR_MIPS_CP0_INDEX:
> + v = (long)kvm_read_c0_guest_index(cop0);
> + break;
> + case MSR_MIPS_CP0_CONTEXT:
> + v = (long)kvm_read_c0_guest_context(cop0);
> + break;
> + case MSR_MIPS_CP0_PAGEMASK:
> + v = (long)kvm_read_c0_guest_pagemask(cop0);
> + break;
> + case MSR_MIPS_CP0_WIRED:
> + v = (long)kvm_read_c0_guest_wired(cop0);
> + break;
> + case MSR_MIPS_CP0_BADVADDR:
> + v = (long)kvm_read_c0_guest_badvaddr(cop0);
> + break;
> + case MSR_MIPS_CP0_ENTRYHI:
> + v = (long)kvm_read_c0_guest_entryhi(cop0);
> + break;
> + case MSR_MIPS_CP0_STATUS:
> + v = (long)kvm_read_c0_guest_status(cop0);
> + break;
> + case MSR_MIPS_CP0_CAUSE:
> + v = (long)kvm_read_c0_guest_cause(cop0);
> + break;
> + case MSR_MIPS_CP0_ERROREPC:
> + v = (long)kvm_read_c0_guest_errorepc(cop0);
> + break;
> + case MSR_MIPS_CP0_CONFIG:
> + v = (long)kvm_read_c0_guest_config(cop0);
> + break;
> + case MSR_MIPS_CP0_CONFIG1:
> + v = (long)kvm_read_c0_guest_config1(cop0);
> + break;
> + case MSR_MIPS_CP0_CONFIG2:
> + v = (long)kvm_read_c0_guest_config2(cop0);
> + break;
> + case MSR_MIPS_CP0_CONFIG3:
> + v = (long)kvm_read_c0_guest_config3(cop0);
> + break;
> + case MSR_MIPS_CP0_CONFIG7:
> + v = (long)kvm_read_c0_guest_config7(cop0);
> + break;
> + default:
> + return -EINVAL;
> + }
> + *data = v;
> + return 0;
> +}
>
> - kvm_write_c0_guest_status(cop0, regs->cp0reg[MIPS_CP0_STATUS][0]);
> - kvm_write_c0_guest_cause(cop0, regs->cp0reg[MIPS_CP0_CAUSE][0]);
> - kvm_write_c0_guest_pagemask(cop0,
> - regs->cp0reg[MIPS_CP0_TLB_PG_MASK][0]);
> - kvm_write_c0_guest_wired(cop0, regs->cp0reg[MIPS_CP0_TLB_WIRED][0]);
> - kvm_write_c0_guest_errorepc(cop0, regs->cp0reg[MIPS_CP0_ERROR_PC][0]);
> +static int mipsvz_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
> +{
> + struct mips_coproc *cop0 = vcpu->arch.cop0;
> + u64 v = *data;
>
> + switch (index) {
> + case MSR_MIPS_CP0_INDEX:
> + kvm_write_c0_guest_index(cop0, v);
> + break;
> + case MSR_MIPS_CP0_CONTEXT:
> + kvm_write_c0_guest_context(cop0, v);
> + break;
> + case MSR_MIPS_CP0_PAGEMASK:
> + kvm_write_c0_guest_pagemask(cop0, v);
> + break;
> + case MSR_MIPS_CP0_WIRED:
> + kvm_write_c0_guest_wired(cop0, v);
> + break;
> + case MSR_MIPS_CP0_BADVADDR:
> + kvm_write_c0_guest_badvaddr(cop0, v);
> + break;
> + case MSR_MIPS_CP0_ENTRYHI:
> + kvm_write_c0_guest_entryhi(cop0, v);
> + break;
> + case MSR_MIPS_CP0_STATUS:
> + kvm_write_c0_guest_status(cop0, v);
> + break;
> + case MSR_MIPS_CP0_CAUSE:
> + kvm_write_c0_guest_cause(cop0, v);
> + break;
> + case MSR_MIPS_CP0_ERROREPC:
> + kvm_write_c0_guest_errorepc(cop0, v);
> + break;
> + default:
> + return -EINVAL;
> + }
> return 0;
> }
>
> -static int
> -kvm_trap_emul_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
> +/*
> + * Read or write a bunch of msrs. Parameters are user addresses.
> + *
> + * @return number of msrs set successfully.
> + */
> +static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
> + int (*do_msr)(struct kvm_vcpu *vcpu,
> + unsigned index, u64 *data),
> + bool writeback)
> {
> - struct mips_coproc *cop0 = vcpu->arch.cop0;
> + struct kvm_msrs msrs;
> + struct kvm_msr_entry *entries;
> + int r, n;
> + unsigned size;
> +
> + r = -EFAULT;
> + if (copy_from_user(&msrs, user_msrs, sizeof(msrs)))
> + goto out;
> +
> + r = -E2BIG;
> + if (msrs.nmsrs >= MAX_IO_MSRS)
> + goto out;
> +
> + size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
> + entries = memdup_user(user_msrs->entries, size);
> + if (IS_ERR(entries)) {
> + r = PTR_ERR(entries);
> + goto out;
> + }
>
> - regs->cp0reg[MIPS_CP0_TLB_INDEX][0] = kvm_read_c0_guest_index(cop0);
> - regs->cp0reg[MIPS_CP0_TLB_CONTEXT][0] = kvm_read_c0_guest_context(cop0);
> - regs->cp0reg[MIPS_CP0_BAD_VADDR][0] = kvm_read_c0_guest_badvaddr(cop0);
> - regs->cp0reg[MIPS_CP0_TLB_HI][0] = kvm_read_c0_guest_entryhi(cop0);
> - regs->cp0reg[MIPS_CP0_EXC_PC][0] = kvm_read_c0_guest_epc(cop0);
> -
> - regs->cp0reg[MIPS_CP0_STATUS][0] = kvm_read_c0_guest_status(cop0);
> - regs->cp0reg[MIPS_CP0_CAUSE][0] = kvm_read_c0_guest_cause(cop0);
> - regs->cp0reg[MIPS_CP0_TLB_PG_MASK][0] =
> - kvm_read_c0_guest_pagemask(cop0);
> - regs->cp0reg[MIPS_CP0_TLB_WIRED][0] = kvm_read_c0_guest_wired(cop0);
> - regs->cp0reg[MIPS_CP0_ERROR_PC][0] = kvm_read_c0_guest_errorepc(cop0);
> -
> - regs->cp0reg[MIPS_CP0_CONFIG][0] = kvm_read_c0_guest_config(cop0);
> - regs->cp0reg[MIPS_CP0_CONFIG][1] = kvm_read_c0_guest_config1(cop0);
> - regs->cp0reg[MIPS_CP0_CONFIG][2] = kvm_read_c0_guest_config2(cop0);
> - regs->cp0reg[MIPS_CP0_CONFIG][3] = kvm_read_c0_guest_config3(cop0);
> - regs->cp0reg[MIPS_CP0_CONFIG][7] = kvm_read_c0_guest_config7(cop0);
> + for (n = 0; n < msrs.nmsrs; ++n)
> + if (do_msr(vcpu, entries[n].index, &entries[n].data))
> + break;
> +
> + r = -EFAULT;
> + if (writeback && copy_to_user(user_msrs->entries, entries, size))
> + goto out_free;
> +
> + r = n;
> +
> +out_free:
> + kfree(entries);
> +out:
> + return r;
> +}
> +
> +static int kvm_mips_reset_vcpu(struct kvm_vcpu *vcpu)
> +{
> + int i;
> + for_each_possible_cpu(i) {
> + vcpu->arch.guest_kernel_asid[i] = 0;
> + vcpu->arch.guest_user_asid[i] = 0;
> + }
> + return 0;
> +}
> +
> +int
> +kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_mips_interrupt
> *irq)
> +{
> + int intr = (int)irq->irq;
> + struct kvm_vcpu *dvcpu = NULL;
> +
> + if (intr == 3 || intr == -3 || intr == 4 || intr == -4)
> + kvm_debug("%s: CPU: %d, INTR: %d\n", __func__, irq->cpu,
> + (int)intr);
> +
> + if (irq->cpu == -1)
> + dvcpu = vcpu;
> + else
> + dvcpu = vcpu->kvm->vcpus[irq->cpu];
> +
> + if (intr == 2 || intr == 3 || intr == 4) {
> + kvm_mips_callbacks->queue_io_int(dvcpu, irq);
> +
> + } else if (intr == -2 || intr == -3 || intr == -4) {
> + kvm_mips_callbacks->dequeue_io_int(dvcpu, irq);
> + } else {
> + kvm_err("%s: invalid interrupt ioctl (%d:%d)\n", __func__,
> + irq->cpu, irq->irq);
> + return -EINVAL;
> + }
> +
> + dvcpu->arch.wait = 0;
> +
> + if (waitqueue_active(&dvcpu->wq))
> + wake_up_interruptible(&dvcpu->wq);
>
> return 0;
> }
>
> +long
> +kvm_arch_vcpu_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
> +{
> + struct kvm_vcpu *vcpu = filp->private_data;
> + void __user *argp = (void __user *)arg;
> + long r;
> +
> + switch (ioctl) {
> + case KVM_GET_MSRS:
> + r = msr_io(vcpu, argp, mipsvz_get_msr, true);
> + break;
> + case KVM_SET_MSRS:
> + r = msr_io(vcpu, argp, mipsvz_set_msr, false);
> + break;
> + case KVM_NMI:
> + /* Treat the NMI as a CPU reset */
> + r = kvm_mips_reset_vcpu(vcpu);
> + break;
> + case KVM_INTERRUPT:
> + {
> + struct kvm_mips_interrupt irq;
> + r = -EFAULT;
> + if (copy_from_user(&irq, argp, sizeof(irq)))
> + goto out;
> +
> + kvm_debug("[%d] %s: irq: %d\n", vcpu->vcpu_id, __func__,
> + irq.irq);
> +
> + r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
> + break;
> + }
> + default:
> + r = -ENOIOCTLCMD;
> + }
> +
> +out:
> + return r;
> +}
> +
> +long kvm_arch_dev_ioctl(struct file *filp,
> + unsigned int ioctl, unsigned long arg)
> +{
> + long r;
> + void __user *argp = (void __user *)arg;
> +
> + switch (ioctl) {
> + case KVM_GET_MSR_INDEX_LIST: {
> + struct kvm_msr_list __user *user_msr_list = argp;
> + struct kvm_msr_list msr_list;
> + unsigned n;
> + unsigned num_msrs_to_save;
> +
> + r = -EFAULT;
> + if (copy_from_user(&msr_list, user_msr_list, sizeof(msr_list)))
> + goto out;
> + n = msr_list.nmsrs;
> + msr_list.nmsrs = ARRAY_SIZE(msrs_to_save);
> + num_msrs_to_save = min(n, msr_list.nmsrs);
> + if (copy_to_user(user_msr_list, &msr_list, sizeof(msr_list)))
> + goto out;
> + r = -E2BIG;
> + if (n < msr_list.nmsrs)
> + goto out;
> + r = -EFAULT;
> + if (copy_to_user(user_msr_list->indices, &msrs_to_save,
> + num_msrs_to_save * sizeof(u32)))
> + goto out;
> + r = 0;
> + break;
> + }
> + default:
> + r = -ENOIOCTLCMD;
> + }
> +out:
> + return r;
> +}
> +
> static int kvm_trap_emul_vm_init(struct kvm *kvm)
> {
> return 0;
> @@ -471,8 +729,6 @@ static struct kvm_mips_callbacks kvm_trap_emul_callbacks
> = {
> .dequeue_io_int = kvm_mips_dequeue_io_int_cb,
> .irq_deliver = kvm_mips_irq_deliver_cb,
> .irq_clear = kvm_mips_irq_clear_cb,
> - .vcpu_ioctl_get_regs = kvm_trap_emul_ioctl_get_regs,
> - .vcpu_ioctl_set_regs = kvm_trap_emul_ioctl_set_regs,
> };
>
> int kvm_mips_emulation_init(struct kvm_mips_callbacks **install_callbacks)
> --
> 1.7.11.3
--
Gleb.
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