[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v7 09/10] xen/vmtrace: support for VM forks
From: Tamas K Lengyel <tamas.lengyel@xxxxxxxxx> Implement vmtrace_reset_pt function. Properly set IPT state for VM forks. Signed-off-by: Tamas K Lengyel <tamas.lengyel@xxxxxxxxx> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> --- CC: Jan Beulich <JBeulich@xxxxxxxx> CC: Roger Pau Monné <roger.pau@xxxxxxxxxx> CC: Wei Liu <wl@xxxxxxx> CC: Jun Nakajima <jun.nakajima@xxxxxxxxx> CC: Kevin Tian <kevin.tian@xxxxxxxxx> CC: Michał Leszczyński <michal.leszczynski@xxxxxxx> CC: Tamas K Lengyel <tamas@xxxxxxxxxxxxx> v7: * New --- xen/arch/x86/hvm/vmx/vmx.c | 11 +++++++++++ xen/arch/x86/mm/mem_sharing.c | 3 +++ xen/include/asm-x86/hvm/hvm.h | 9 +++++++++ 3 files changed, 23 insertions(+) diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c index d4e7b50b8a..40ae398cf5 100644 --- a/xen/arch/x86/hvm/vmx/vmx.c +++ b/xen/arch/x86/hvm/vmx/vmx.c @@ -2408,6 +2408,16 @@ static int vmtrace_output_position(struct vcpu *v, uint64_t *pos) return v->arch.hvm.vmx.ipt_active; } +static int vmtrace_reset(struct vcpu *v) +{ + if ( !v->arch.hvm.vmx.ipt_active ) + return -EINVAL; + + v->arch.msrs->rtit.output_offset = 0; + v->arch.msrs->rtit.status = 0; + return 0; +} + static struct hvm_function_table __initdata vmx_function_table = { .name = "VMX", .cpu_up_prepare = vmx_cpu_up_prepare, @@ -2467,6 +2477,7 @@ static struct hvm_function_table __initdata vmx_function_table = { .vmtrace_output_position = vmtrace_output_position, .vmtrace_set_option = vmtrace_set_option, .vmtrace_get_option = vmtrace_get_option, + .vmtrace_reset = vmtrace_reset, .tsc_scaling = { .max_ratio = VMX_TSC_MULTIPLIER_MAX, }, diff --git a/xen/arch/x86/mm/mem_sharing.c b/xen/arch/x86/mm/mem_sharing.c index adaeab4612..fd07eb8d4d 100644 --- a/xen/arch/x86/mm/mem_sharing.c +++ b/xen/arch/x86/mm/mem_sharing.c @@ -1632,6 +1632,8 @@ static int copy_vcpu_settings(struct domain *cd, const struct domain *d) copy_domain_page(new_vcpu_info_mfn, vcpu_info_mfn); } + hvm_vmtrace_reset(cd_vcpu); + /* * TODO: to support VMs with PV interfaces copy additional * settings here, such as PV timers. @@ -1782,6 +1784,7 @@ static int fork(struct domain *cd, struct domain *d) cd->max_pages = d->max_pages; *cd->arch.cpuid = *d->arch.cpuid; *cd->arch.msr = *d->arch.msr; + cd->vmtrace_frames = d->vmtrace_frames; cd->parent = d; } diff --git a/xen/include/asm-x86/hvm/hvm.h b/xen/include/asm-x86/hvm/hvm.h index 960ec03917..150746de66 100644 --- a/xen/include/asm-x86/hvm/hvm.h +++ b/xen/include/asm-x86/hvm/hvm.h @@ -219,6 +219,7 @@ struct hvm_function_table { int (*vmtrace_output_position)(struct vcpu *v, uint64_t *pos); int (*vmtrace_set_option)(struct vcpu *v, uint64_t key, uint64_t value); int (*vmtrace_get_option)(struct vcpu *v, uint64_t key, uint64_t *value); + int (*vmtrace_reset)(struct vcpu *v); /* * Parameters and callbacks for hardware-assisted TSC scaling, @@ -696,6 +697,14 @@ static inline int hvm_vmtrace_get_option( return -EOPNOTSUPP; } +static inline int hvm_vmtrace_reset(struct vcpu *v) +{ + if ( hvm_funcs.vmtrace_reset ) + return hvm_funcs.vmtrace_reset(v); + + return -EOPNOTSUPP; +} + /* * This must be defined as a macro instead of an inline function, * because it uses 'struct vcpu' and 'struct domain' which have -- 2.11.0
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |