[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [RFC v2 1/6] xen/arm: Save and restore support with hvm context hypercalls
From: Jaeyong Yoo <jaeyong.yoo@xxxxxxxxxxx> This patch implements HVM context hypercalls to support ARM guest save and restore. It saves the states of guest GIC, arch timer, and CPU registers. Signed-off-by: Evgeny Fedotov <e.fedotov@xxxxxxxxxxx> Signed-off-by: Wei Huang <w1.huang@xxxxxxxxxxx> --- xen/arch/arm/Makefile | 1 + xen/arch/arm/hvm.c | 268 +++++++++++++++++++++++++++++++- xen/arch/arm/save.c | 65 ++++++++ xen/arch/arm/vgic.c | 146 +++++++++++++++++ xen/arch/arm/vtimer.c | 71 +++++++++ xen/arch/x86/domctl.c | 70 --------- xen/common/Makefile | 2 +- xen/common/domctl.c | 74 +++++++++ xen/include/asm-arm/hvm/support.h | 29 ++++ xen/include/public/arch-arm/hvm/save.h | 130 ++++++++++++++++ 10 files changed, 784 insertions(+), 72 deletions(-) create mode 100644 xen/arch/arm/save.c create mode 100644 xen/include/asm-arm/hvm/support.h diff --git a/xen/arch/arm/Makefile b/xen/arch/arm/Makefile index 63e0460..d9a328c 100644 --- a/xen/arch/arm/Makefile +++ b/xen/arch/arm/Makefile @@ -33,6 +33,7 @@ obj-y += hvm.o obj-y += device.o obj-y += decode.o obj-y += processor.o +obj-y += save.o #obj-bin-y += ....o diff --git a/xen/arch/arm/hvm.c b/xen/arch/arm/hvm.c index 471c4cd..18eb2bd 100644 --- a/xen/arch/arm/hvm.c +++ b/xen/arch/arm/hvm.c @@ -4,6 +4,7 @@ #include <xen/errno.h> #include <xen/guest_access.h> #include <xen/sched.h> +#include <xen/hvm/save.h> #include <xsm/xsm.h> @@ -12,9 +13,9 @@ #include <public/hvm/hvm_op.h> #include <asm/hypercall.h> +#include <asm/gic.h> long do_hvm_op(unsigned long op, XEN_GUEST_HANDLE_PARAM(void) arg) - { long rc = 0; @@ -65,3 +66,268 @@ long do_hvm_op(unsigned long op, XEN_GUEST_HANDLE_PARAM(void) arg) return rc; } + +/* Save CPU related states into save/retore context */ +static int hvm_save_cpu_ctxt(struct domain *d, hvm_domain_context_t *h) +{ + struct hvm_hw_cpu ctxt; + struct vcpu_guest_core_regs c; + struct vcpu *v; + int ret = 0; + + /* Save the state of CPU */ + for_each_vcpu( d, v ) + { + memset(&ctxt, 0, sizeof(ctxt)); + + ctxt.sctlr = v->arch.sctlr; + ctxt.ttbr0 = v->arch.ttbr0; + ctxt.ttbr1 = v->arch.ttbr1; + ctxt.ttbcr = v->arch.ttbcr; + + ctxt.dacr = v->arch.dacr; + ctxt.ifsr = v->arch.ifsr; +#ifdef CONFIG_ARM_32 + ctxt.ifar = v->arch.ifar; + ctxt.dfar = v->arch.dfar; + ctxt.dfsr = v->arch.dfsr; +#else + ctxt.far = v->arch.far; + ctxt.esr = v->arch.esr; +#endif + +#ifdef CONFIG_ARM_32 + ctxt.mair0 = v->arch.mair0; + ctxt.mair1 = v->arch.mair1; +#else + ctxt.mair0 = v->arch.mair; +#endif + + /* Control Registers */ + ctxt.actlr = v->arch.actlr; + ctxt.sctlr = v->arch.sctlr; + ctxt.cpacr = v->arch.cpacr; + + ctxt.contextidr = v->arch.contextidr; + ctxt.tpidr_el0 = v->arch.tpidr_el0; + ctxt.tpidr_el1 = v->arch.tpidr_el1; + ctxt.tpidrro_el0 = v->arch.tpidrro_el0; + + /* CP 15 */ + ctxt.csselr = v->arch.csselr; + + ctxt.afsr0 = v->arch.afsr0; + ctxt.afsr1 = v->arch.afsr1; + ctxt.vbar = v->arch.vbar; + ctxt.par = v->arch.par; + ctxt.teecr = v->arch.teecr; + ctxt.teehbr = v->arch.teehbr; + +#ifdef CONFIG_ARM_32 + ctxt.joscr = v->arch.joscr; + ctxt.jmcr = v->arch.jmcr; +#endif + + memset(&c, 0, sizeof(c)); + + /* get guest core registers */ + vcpu_regs_hyp_to_user(v, &c); + + ctxt.x0 = c.x0; + ctxt.x1 = c.x1; + ctxt.x2 = c.x2; + ctxt.x3 = c.x3; + ctxt.x4 = c.x4; + ctxt.x5 = c.x5; + ctxt.x6 = c.x6; + ctxt.x7 = c.x7; + ctxt.x8 = c.x8; + ctxt.x9 = c.x9; + ctxt.x10 = c.x10; + ctxt.x11 = c.x11; + ctxt.x12 = c.x12; + ctxt.x13 = c.x13; + ctxt.x14 = c.x14; + ctxt.x15 = c.x15; + ctxt.x16 = c.x16; + ctxt.x17 = c.x17; + ctxt.x18 = c.x18; + ctxt.x19 = c.x19; + ctxt.x20 = c.x20; + ctxt.x21 = c.x21; + ctxt.x22 = c.x22; + ctxt.x23 = c.x23; + ctxt.x24 = c.x24; + ctxt.x25 = c.x25; + ctxt.x26 = c.x26; + ctxt.x27 = c.x27; + ctxt.x28 = c.x28; + ctxt.x29 = c.x29; + ctxt.x30 = c.x30; + ctxt.pc64 = c.pc64; + ctxt.cpsr = c.cpsr; + ctxt.spsr_el1 = c.spsr_el1; /* spsr_svc */ + +#ifdef CONFIG_ARM_32 + ctxt.spsr_fiq = c.spsr_fiq; + ctxt.spsr_irq = c.spsr_irq; + ctxt.spsr_und = c.spsr_und; + ctxt.spsr_abt = c.spsr_abt; +#endif +#ifdef CONFIG_ARM_64 + ctxt.sp_el0 = c.sp_el0; + ctxt.sp_el1 = c.sp_el1; + ctxt.elr_el1 = c.elr_el1; +#endif + + /* check VFP state size */ + BUILD_BUG_ON(sizeof(v->arch.vfp) > sizeof (ctxt.vfp)); + memcpy((void*) &ctxt.vfp, (void*) &v->arch.vfp, sizeof(v->arch.vfp)); + + ctxt.pause_flags = v->pause_flags; + + if ( (ret = hvm_save_entry(VCPU, v->vcpu_id, h, &ctxt)) != 0 ) + return ret; + } + + return ret; +} + +/* Load CPU related states from existing save/retore context */ +static int hvm_load_cpu_ctxt(struct domain *d, hvm_domain_context_t *h) +{ + int vcpuid; + struct hvm_hw_cpu ctxt; + struct vcpu *v; + struct vcpu_guest_core_regs c; + + vcpuid = hvm_load_instance(h); + if ( vcpuid >= d->max_vcpus || (v = d->vcpu[vcpuid]) == NULL ) + { + dprintk(XENLOG_G_ERR, "HVM restore: dom%u has no vcpu%u\n", + d->domain_id, vcpuid); + return -EINVAL; + } + + if ( hvm_load_entry(VCPU, h, &ctxt) != 0 ) + return -EINVAL; + + v->arch.sctlr = ctxt.sctlr; + v->arch.ttbr0 = ctxt.ttbr0; + v->arch.ttbr1 = ctxt.ttbr1; + v->arch.ttbcr = ctxt.ttbcr; + + v->arch.dacr = ctxt.dacr; + v->arch.ifsr = ctxt.ifsr; +#ifdef CONFIG_ARM_32 + v->arch.ifar = ctxt.ifar; + v->arch.dfar = ctxt.dfar; + v->arch.dfsr = ctxt.dfsr; +#else + v->arch.far = ctxt.far; + v->arch.esr = ctxt.esr; +#endif + +#ifdef CONFIG_ARM_32 + v->arch.mair0 = ctxt.mair0; + v->arch.mair1 = ctxt.mair1; +#else + v->arch.mair = ctxt.mair0; +#endif + + /* Control Registers */ + v->arch.actlr = ctxt.actlr; + v->arch.cpacr = ctxt.cpacr; + v->arch.contextidr = ctxt.contextidr; + v->arch.tpidr_el0 = ctxt.tpidr_el0; + v->arch.tpidr_el1 = ctxt.tpidr_el1; + v->arch.tpidrro_el0 = ctxt.tpidrro_el0; + + /* CP 15 */ + v->arch.csselr = ctxt.csselr; + + v->arch.afsr0 = ctxt.afsr0; + v->arch.afsr1 = ctxt.afsr1; + v->arch.vbar = ctxt.vbar; + v->arch.par = ctxt.par; + v->arch.teecr = ctxt.teecr; + v->arch.teehbr = ctxt.teehbr; +#ifdef CONFIG_ARM_32 + v->arch.joscr = ctxt.joscr; + v->arch.jmcr = ctxt.jmcr; +#endif + + /* fill guest core registers */ + memset(&c, 0, sizeof(c)); + c.x0 = ctxt.x0; + c.x1 = ctxt.x1; + c.x2 = ctxt.x2; + c.x3 = ctxt.x3; + c.x4 = ctxt.x4; + c.x5 = ctxt.x5; + c.x6 = ctxt.x6; + c.x7 = ctxt.x7; + c.x8 = ctxt.x8; + c.x9 = ctxt.x9; + c.x10 = ctxt.x10; + c.x11 = ctxt.x11; + c.x12 = ctxt.x12; + c.x13 = ctxt.x13; + c.x14 = ctxt.x14; + c.x15 = ctxt.x15; + c.x16 = ctxt.x16; + c.x17 = ctxt.x17; + c.x18 = ctxt.x18; + c.x19 = ctxt.x19; + c.x20 = ctxt.x20; + c.x21 = ctxt.x21; + c.x22 = ctxt.x22; + c.x23 = ctxt.x23; + c.x24 = ctxt.x24; + c.x25 = ctxt.x25; + c.x26 = ctxt.x26; + c.x27 = ctxt.x27; + c.x28 = ctxt.x28; + c.x29 = ctxt.x29; + c.x30 = ctxt.x30; + c.pc64 = ctxt.pc64; + c.cpsr = ctxt.cpsr; + c.spsr_el1 = ctxt.spsr_el1; /* spsr_svc */ + +#ifdef CONFIG_ARM_32 + c.spsr_fiq = ctxt.spsr_fiq; + c.spsr_irq = ctxt.spsr_irq; + c.spsr_und = ctxt.spsr_und; + c.spsr_abt = ctxt.spsr_abt; +#endif +#ifdef CONFIG_ARM_64 + c.sp_el0 = ctxt.sp_el0; + c.sp_el1 = ctxt.sp_el1; + c.elr_el1 = ctxt.elr_el1; +#endif + + /* set guest core registers */ + vcpu_regs_user_to_hyp(v, &c); + + /* check VFP state size */ + BUILD_BUG_ON(sizeof(v->arch.vfp) > sizeof (ctxt.vfp)); + memcpy(&v->arch.vfp, &ctxt, sizeof(v->arch.vfp)); + + v->is_initialised = 1; + v->pause_flags = ctxt.pause_flags; + + return 0; +} + +HVM_REGISTER_SAVE_RESTORE(VCPU, hvm_save_cpu_ctxt, hvm_load_cpu_ctxt, 1, + HVMSR_PER_VCPU); + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * tab-width: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/arch/arm/save.c b/xen/arch/arm/save.c new file mode 100644 index 0000000..eef14a8 --- /dev/null +++ b/xen/arch/arm/save.c @@ -0,0 +1,65 @@ +/* + * Save.c: Save and restore HVM guest's emulated hardware state for ARM. + * + * Copyright (c) 2014, Samsung Electronics. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., 59 Temple + * Place - Suite 330, Boston, MA 02111-1307 USA. + */ +#include <asm/hvm/support.h> +#include <public/hvm/save.h> + +void arch_hvm_save(struct domain *d, struct hvm_save_header *hdr) +{ + hdr->cpuid = current_cpu_data.midr.bits; +} + +int arch_hvm_load(struct domain *d, struct hvm_save_header *hdr) +{ + uint32_t cpuid; + + if ( hdr->magic != HVM_FILE_MAGIC ) + { + printk(XENLOG_G_ERR "HVM%d restore: bad magic number %#"PRIx32"\n", + d->domain_id, hdr->magic); + return -EINVAL; + } + + if ( hdr->version != HVM_FILE_VERSION ) + { + printk(XENLOG_G_ERR "HVM%d restore: unsupported version %u\n", + d->domain_id, hdr->version); + return -EINVAL; + } + + cpuid = current_cpu_data.midr.bits; + if ( hdr->cpuid != cpuid ) + { + printk(XENLOG_G_INFO "HVM%d restore: VM saved on one CPU " + "(%#"PRIx32") and restored on another (%#"PRIx32").\n", + d->domain_id, hdr->cpuid, cpuid); + return -EINVAL; + } + + return 0; +} + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * tab-width: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/arch/arm/vgic.c b/xen/arch/arm/vgic.c index 9fc9586..af244a7 100644 --- a/xen/arch/arm/vgic.c +++ b/xen/arch/arm/vgic.c @@ -24,6 +24,7 @@ #include <xen/softirq.h> #include <xen/irq.h> #include <xen/sched.h> +#include <xen/hvm/save.h> #include <asm/current.h> @@ -73,6 +74,75 @@ static struct vgic_irq_rank *vgic_irq_rank(struct vcpu *v, int b, int n) return NULL; } +/* Save rank info into a context to support domain save/restore */ +static int vgic_save_irq_rank(struct vcpu *v, struct vgic_rank *ext, + struct vgic_irq_rank *rank) +{ + spin_lock(&rank->lock); + + /* IENABLE, IACTIVE, IPEND, PENDSGI registers */ + ext->ienable = rank->ienable; + ext->iactive = rank->iactive; + ext->ipend = rank->ipend; + ext->pendsgi = rank->pendsgi; + + /* ICFG */ + ext->icfg[0] = rank->icfg[0]; + ext->icfg[1] = rank->icfg[1]; + + /* IPRIORITY */ + BUILD_BUG_ON(sizeof(rank->ipriority) != sizeof (ext->ipriority)); + memcpy(ext->ipriority, rank->ipriority, sizeof(rank->ipriority)); + + /* ITARGETS */ + BUILD_BUG_ON(sizeof(rank->itargets) != sizeof (ext->itargets)); + memcpy(ext->itargets, rank->itargets, sizeof(rank->itargets)); + + spin_unlock(&rank->lock); + + return 0; +} + +/* Load rank info from a context to support for domain save/restore */ +static int vgic_load_irq_rank(struct vcpu *v, struct vgic_irq_rank *rank, + struct vgic_rank *ext) +{ + struct pending_irq *p; + unsigned int irq = 0; + const unsigned long enable_bits = ext->ienable; + + spin_lock(&rank->lock); + + /* IENABLE, IACTIVE, IPEND, PENDSGI registers */ + rank->ienable = ext->ienable; + rank->iactive = ext->iactive; + rank->ipend = ext->ipend; + rank->pendsgi = ext->pendsgi; + + /* ICFG */ + rank->icfg[0] = ext->icfg[0]; + rank->icfg[1] = ext->icfg[1]; + + /* IPRIORITY */ + BUILD_BUG_ON(sizeof(rank->ipriority) != sizeof (ext->ipriority)); + memcpy(rank->ipriority, ext->ipriority, sizeof(rank->ipriority)); + + /* ITARGETS */ + BUILD_BUG_ON(sizeof(rank->itargets) != sizeof (ext->itargets)); + memcpy(rank->itargets, ext->itargets, sizeof(rank->itargets)); + + /* Set IRQ status as enabled by iterating through rank->ienable */ + while ( (irq = find_next_bit(&enable_bits, 32, irq)) < 32 ) { + p = irq_to_pending(v, irq); + set_bit(GIC_IRQ_GUEST_ENABLED, &p->status); + irq++; + } + + spin_unlock(&rank->lock); + + return 0; +} + int domain_vgic_init(struct domain *d) { int i; @@ -749,6 +819,82 @@ out: smp_send_event_check_mask(cpumask_of(v->processor)); } + +/* Save GIC state into a context to support save/restore */ +static int hvm_gic_save_ctxt(struct domain *d, hvm_domain_context_t *h) +{ + struct hvm_hw_gic ctxt; + struct vcpu *v; + int ret = 0; + + /* Save the state of GICs */ + for_each_vcpu( d, v ) + { + ctxt.gic_hcr = v->arch.gic_hcr; + ctxt.gic_vmcr = v->arch.gic_vmcr; + ctxt.gic_apr = v->arch.gic_apr; + + /* Save list registers and masks */ + BUILD_BUG_ON(sizeof(v->arch.gic_lr) > sizeof (ctxt.gic_lr)); + memcpy(ctxt.gic_lr, v->arch.gic_lr, sizeof(v->arch.gic_lr)); + + ctxt.lr_mask = v->arch.lr_mask; + ctxt.event_mask = v->arch.event_mask; + + /* Save PPI states (per-CPU), necessary for SMP-enabled guests */ + if ( (ret = vgic_save_irq_rank(v, &ctxt.ppi_state, + &v->arch.vgic.private_irqs)) != 0 ) + return ret; + + if ( (ret = hvm_save_entry(GIC, v->vcpu_id, h, &ctxt)) != 0 ) + return ret; + } + + return ret; +} + +/* Restore GIC state from a context to support save/restore */ +static int hvm_gic_load_ctxt(struct domain *d, hvm_domain_context_t *h) +{ + int vcpuid; + struct hvm_hw_gic ctxt; + struct vcpu *v; + int ret = 0; + + /* Which vcpu is this? */ + vcpuid = hvm_load_instance(h); + if ( vcpuid >= d->max_vcpus || (v = d->vcpu[vcpuid]) == NULL ) + { + dprintk(XENLOG_G_ERR, "HVM restore: dom%u has no vcpu%u\n", + d->domain_id, vcpuid); + return -EINVAL; + } + + if ( hvm_load_entry(GIC, h, &ctxt) != 0 ) + return -EINVAL; + + v->arch.gic_hcr = ctxt.gic_hcr; + v->arch.gic_vmcr = ctxt.gic_vmcr; + v->arch.gic_apr = ctxt.gic_apr; + + /* Restore list registers and masks */ + BUILD_BUG_ON(sizeof(v->arch.gic_lr) > sizeof (ctxt.gic_lr)); + memcpy(v->arch.gic_lr, ctxt.gic_lr, sizeof(v->arch.gic_lr)); + + v->arch.lr_mask = ctxt.lr_mask; + v->arch.event_mask = ctxt.event_mask; + + /* Restore PPI states */ + if ( (ret = vgic_load_irq_rank(v, &v->arch.vgic.private_irqs, + &ctxt.ppi_state)) != 0 ) + return ret; + + return ret; +} + +HVM_REGISTER_SAVE_RESTORE(GIC, hvm_gic_save_ctxt, hvm_gic_load_ctxt, 1, + HVMSR_PER_VCPU); + /* * Local variables: * mode: C diff --git a/xen/arch/arm/vtimer.c b/xen/arch/arm/vtimer.c index 3d6a721..7c47eac 100644 --- a/xen/arch/arm/vtimer.c +++ b/xen/arch/arm/vtimer.c @@ -21,6 +21,7 @@ #include <xen/lib.h> #include <xen/timer.h> #include <xen/sched.h> +#include <xen/hvm/save.h> #include <asm/irq.h> #include <asm/time.h> #include <asm/gic.h> @@ -284,6 +285,76 @@ int vtimer_emulate(struct cpu_user_regs *regs, union hsr hsr) } } +static int hvm_vtimer_save_ctxt(struct domain *d, hvm_domain_context_t *h) +{ + struct hvm_hw_timer ctxt; + struct vcpu *v; + struct vtimer *t; + int i, ret = 0; + + /* Save the state of vtimer and ptimer */ + for_each_vcpu( d, v ) + { + t = &v->arch.virt_timer; + for ( i = 0; i < 2; i++ ) + { + ctxt.cval = t->cval; + ctxt.ctl = t->ctl; + ctxt.vtb_offset = i ? d->arch.phys_timer_base.offset : + d->arch.virt_timer_base.offset; + ctxt.type = i ? TIMER_TYPE_PHYS : TIMER_TYPE_VIRT; + + if ( (ret = hvm_save_entry(TIMER, v->vcpu_id, h, &ctxt)) != 0 ) + return ret; + + t = &v->arch.phys_timer; + } + } + + return ret; +} + +static int hvm_vtimer_load_ctxt(struct domain *d, hvm_domain_context_t *h) +{ + int vcpuid; + struct hvm_hw_timer ctxt; + struct vcpu *v; + struct vtimer *t = NULL; + + /* Which vcpu is this? */ + vcpuid = hvm_load_instance(h); + + if ( vcpuid >= d->max_vcpus || (v = d->vcpu[vcpuid]) == NULL ) + { + dprintk(XENLOG_G_ERR, "HVM restore: dom%u has no vcpu%u\n", + d->domain_id, vcpuid); + return -EINVAL; + } + + if ( hvm_load_entry(TIMER, h, &ctxt) != 0 ) + return -EINVAL; + + if ( ctxt.type == TIMER_TYPE_VIRT ) + { + t = &v->arch.virt_timer; + d->arch.virt_timer_base.offset = ctxt.vtb_offset; + } + else + { + t = &v->arch.phys_timer; + d->arch.phys_timer_base.offset = ctxt.vtb_offset; + } + + t->cval = ctxt.cval; + t->ctl = ctxt.ctl; + t->v = v; + + return 0; +} + +HVM_REGISTER_SAVE_RESTORE(TIMER, hvm_vtimer_save_ctxt, hvm_vtimer_load_ctxt, + 2, HVMSR_PER_VCPU); + /* * Local variables: * mode: C diff --git a/xen/arch/x86/domctl.c b/xen/arch/x86/domctl.c index 26635ff..30fbd30 100644 --- a/xen/arch/x86/domctl.c +++ b/xen/arch/x86/domctl.c @@ -399,76 +399,6 @@ long arch_do_domctl( } break; - case XEN_DOMCTL_sethvmcontext: - { - struct hvm_domain_context c = { .size = domctl->u.hvmcontext.size }; - - ret = -EINVAL; - if ( !is_hvm_domain(d) ) - goto sethvmcontext_out; - - ret = -ENOMEM; - if ( (c.data = xmalloc_bytes(c.size)) == NULL ) - goto sethvmcontext_out; - - ret = -EFAULT; - if ( copy_from_guest(c.data, domctl->u.hvmcontext.buffer, c.size) != 0) - goto sethvmcontext_out; - - domain_pause(d); - ret = hvm_load(d, &c); - domain_unpause(d); - - sethvmcontext_out: - if ( c.data != NULL ) - xfree(c.data); - } - break; - - case XEN_DOMCTL_gethvmcontext: - { - struct hvm_domain_context c = { 0 }; - - ret = -EINVAL; - if ( !is_hvm_domain(d) ) - goto gethvmcontext_out; - - c.size = hvm_save_size(d); - - if ( guest_handle_is_null(domctl->u.hvmcontext.buffer) ) - { - /* Client is querying for the correct buffer size */ - domctl->u.hvmcontext.size = c.size; - ret = 0; - goto gethvmcontext_out; - } - - /* Check that the client has a big enough buffer */ - ret = -ENOSPC; - if ( domctl->u.hvmcontext.size < c.size ) - goto gethvmcontext_out; - - /* Allocate our own marshalling buffer */ - ret = -ENOMEM; - if ( (c.data = xmalloc_bytes(c.size)) == NULL ) - goto gethvmcontext_out; - - domain_pause(d); - ret = hvm_save(d, &c); - domain_unpause(d); - - domctl->u.hvmcontext.size = c.cur; - if ( copy_to_guest(domctl->u.hvmcontext.buffer, c.data, c.size) != 0 ) - ret = -EFAULT; - - gethvmcontext_out: - copyback = 1; - - if ( c.data != NULL ) - xfree(c.data); - } - break; - case XEN_DOMCTL_gethvmcontext_partial: { ret = -EINVAL; diff --git a/xen/common/Makefile b/xen/common/Makefile index 3683ae3..13b781f 100644 --- a/xen/common/Makefile +++ b/xen/common/Makefile @@ -62,7 +62,7 @@ obj-$(CONFIG_XENCOMM) += xencomm.o subdir-$(CONFIG_COMPAT) += compat -subdir-$(x86_64) += hvm +subdir-y += hvm subdir-$(coverage) += gcov diff --git a/xen/common/domctl.c b/xen/common/domctl.c index 5342e5d..2ea4af5 100644 --- a/xen/common/domctl.c +++ b/xen/common/domctl.c @@ -24,6 +24,8 @@ #include <xen/bitmap.h> #include <xen/paging.h> #include <xen/hypercall.h> +#include <xen/hvm/save.h> +#include <xen/guest_access.h> #include <asm/current.h> #include <asm/irq.h> #include <asm/page.h> @@ -881,6 +883,78 @@ long do_domctl(XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_domctl) } break; + case XEN_DOMCTL_sethvmcontext: + { + struct hvm_domain_context c = { .size = op->u.hvmcontext.size }; + + ret = -EINVAL; + if ( (d == current->domain) || /* no domain_pause() */ + !is_hvm_domain(d) ) + goto sethvmcontext_out; + + ret = -ENOMEM; + if ( (c.data = xmalloc_bytes(c.size)) == NULL ) + goto sethvmcontext_out; + + ret = -EFAULT; + if ( copy_from_guest(c.data, op->u.hvmcontext.buffer, c.size) != 0) + goto sethvmcontext_out; + + domain_pause(d); + ret = hvm_load(d, &c); + domain_unpause(d); + + sethvmcontext_out: + if ( c.data != NULL ) + xfree(c.data); + } + break; + + case XEN_DOMCTL_gethvmcontext: + { + struct hvm_domain_context c = { 0 }; + + ret = -EINVAL; + if ( (d == current->domain) || /* no domain_pause() */ + !is_hvm_domain(d) ) + goto gethvmcontext_out; + + c.size = hvm_save_size(d); + + if ( guest_handle_is_null(op->u.hvmcontext.buffer) ) + { + /* Client is querying for the correct buffer size */ + op->u.hvmcontext.size = c.size; + ret = 0; + goto gethvmcontext_out; + } + + /* Check that the client has a big enough buffer */ + ret = -ENOSPC; + if ( op->u.hvmcontext.size < c.size ) + goto gethvmcontext_out; + + /* Allocate our own marshalling buffer */ + ret = -ENOMEM; + if ( (c.data = xmalloc_bytes(c.size)) == NULL ) + goto gethvmcontext_out; + + domain_pause(d); + ret = hvm_save(d, &c); + domain_unpause(d); + + op->u.hvmcontext.size = c.cur; + if ( copy_to_guest(op->u.hvmcontext.buffer, c.data, c.size) != 0 ) + ret = -EFAULT; + + gethvmcontext_out: + copyback = 1; + + if ( c.data != NULL ) + xfree(c.data); + } + break; + default: ret = arch_do_domctl(op, d, u_domctl); break; diff --git a/xen/include/asm-arm/hvm/support.h b/xen/include/asm-arm/hvm/support.h new file mode 100644 index 0000000..09f7cb8 --- /dev/null +++ b/xen/include/asm-arm/hvm/support.h @@ -0,0 +1,29 @@ +/* + * asm-arm/hvm/support.h: HVM support routines used by ARM. + * + * Copyright (c) 2014, Samsung Electronics. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., 59 Temple + * Place - Suite 330, Boston, MA 02111-1307 USA. + */ + +#ifndef __ASM_ARM_HVM_SUPPORT_H__ +#define __ASM_ARM_HVM_SUPPORT_H__ + +#include <xen/types.h> +#include <public/hvm/ioreq.h> +#include <xen/sched.h> +#include <xen/hvm/save.h> +#include <asm/processor.h> + +#endif /* __ASM_ARM_HVM_SUPPORT_H__ */ diff --git a/xen/include/public/arch-arm/hvm/save.h b/xen/include/public/arch-arm/hvm/save.h index 75b8e65..f6ad258 100644 --- a/xen/include/public/arch-arm/hvm/save.h +++ b/xen/include/public/arch-arm/hvm/save.h @@ -26,6 +26,136 @@ #ifndef __XEN_PUBLIC_HVM_SAVE_ARM_H__ #define __XEN_PUBLIC_HVM_SAVE_ARM_H__ +#define HVM_FILE_MAGIC 0x92385520 +#define HVM_FILE_VERSION 0x00000001 + +struct hvm_save_header +{ + uint32_t magic; /* Must be HVM_FILE_MAGIC */ + uint32_t version; /* File format version */ + uint64_t changeset; /* Version of Xen that saved this file */ + uint32_t cpuid; /* MIDR_EL1 on the saving machine */ +}; +DECLARE_HVM_SAVE_TYPE(HEADER, 1, struct hvm_save_header); + +struct vgic_rank +{ + uint32_t ienable, iactive, ipend, pendsgi; + uint32_t icfg[2]; + uint32_t ipriority[8]; + uint32_t itargets[8]; +}; + +struct hvm_hw_gic +{ + uint32_t gic_hcr; + uint32_t gic_vmcr; + uint32_t gic_apr; + uint32_t gic_lr[64]; + uint64_t event_mask; + uint64_t lr_mask; + struct vgic_rank ppi_state; +}; +DECLARE_HVM_SAVE_TYPE(GIC, 2, struct hvm_hw_gic); + +#define TIMER_TYPE_VIRT 0 +#define TIMER_TYPE_PHYS 1 + +struct hvm_hw_timer +{ + uint64_t vtb_offset; + uint32_t ctl; + uint64_t cval; + uint32_t type; +}; +DECLARE_HVM_SAVE_TYPE(TIMER, 3, struct hvm_hw_timer); + +struct hvm_hw_cpu +{ +#ifdef CONFIG_ARM_32 + uint64_t vfp[34]; /* 32-bit VFP registers */ +#else + uint64_t vfp[66]; /* 64-bit VFP registers */ +#endif + + /* Guest core registers */ + uint64_t x0; /* r0_usr */ + uint64_t x1; /* r1_usr */ + uint64_t x2; /* r2_usr */ + uint64_t x3; /* r3_usr */ + uint64_t x4; /* r4_usr */ + uint64_t x5; /* r5_usr */ + uint64_t x6; /* r6_usr */ + uint64_t x7; /* r7_usr */ + uint64_t x8; /* r8_usr */ + uint64_t x9; /* r9_usr */ + uint64_t x10; /* r10_usr */ + uint64_t x11; /* r11_usr */ + uint64_t x12; /* r12_usr */ + uint64_t x13; /* sp_usr */ + uint64_t x14; /* lr_usr; */ + uint64_t x15; /* __unused_sp_hyp */ + uint64_t x16; /* lr_irq */ + uint64_t x17; /* sp_irq */ + uint64_t x18; /* lr_svc */ + uint64_t x19; /* sp_svc */ + uint64_t x20; /* lr_abt */ + uint64_t x21; /* sp_abt */ + uint64_t x22; /* lr_und */ + uint64_t x23; /* sp_und */ + uint64_t x24; /* r8_fiq */ + uint64_t x25; /* r9_fiq */ + uint64_t x26; /* r10_fiq */ + uint64_t x27; /* r11_fiq */ + uint64_t x28; /* r12_fiq */ + uint64_t x29; /* fp,sp_fiq */ + uint64_t x30; /* lr_fiq */ + uint64_t pc64; /* ELR_EL2 */ + uint32_t cpsr; /* SPSR_EL2 */ + uint32_t spsr_el1; /*spsr_svc */ + /* AArch32 guests only */ + uint32_t spsr_fiq, spsr_irq, spsr_und, spsr_abt; + /* AArch64 guests only */ + uint64_t sp_el0; + uint64_t sp_el1, elr_el1; + + uint32_t sctlr, ttbcr; + uint64_t ttbr0, ttbr1; + + uint32_t ifar, dfar; + uint32_t ifsr, dfsr; + uint32_t dacr; + uint64_t par; + + uint64_t far; + uint64_t esr; + + uint64_t mair0, mair1; + uint64_t tpidr_el0; + uint64_t tpidr_el1; + uint64_t tpidrro_el0; + uint64_t vbar; + + /* Control Registers */ + uint32_t actlr; + uint32_t cpacr; + uint32_t afsr0, afsr1; + uint32_t contextidr; + uint32_t teecr, teehbr; /* ThumbEE, 32-bit guests only */ + uint32_t joscr, jmcr; + /* CP 15 */ + uint32_t csselr; + + unsigned long pause_flags; + +}; +DECLARE_HVM_SAVE_TYPE(VCPU, 4, struct hvm_hw_cpu); + +/* + * Largest type-code in use + */ +#define HVM_SAVE_CODE_MAX 4 + #endif /* -- 1.7.9.5 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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