From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Xen-devel <xen-devel@lists.xenproject.org>
Cc: "Tamas K Lengyel" <tamas.lengyel@intel.com>,
"Andrew Cooper" <andrew.cooper3@citrix.com>,
"Jan Beulich" <JBeulich@suse.com>,
"Roger Pau Monné" <roger.pau@citrix.com>, "Wei Liu" <wl@xen.org>,
"Jun Nakajima" <jun.nakajima@intel.com>,
"Kevin Tian" <kevin.tian@intel.com>,
"Michał Leszczyński" <michal.leszczynski@cert.pl>,
"Tamas K Lengyel" <tamas@tklengyel.com>
Subject: [PATCH v7 09/10] xen/vmtrace: support for VM forks
Date: Thu, 21 Jan 2021 21:27:17 +0000 [thread overview]
Message-ID: <20210121212718.2441-10-andrew.cooper3@citrix.com> (raw)
In-Reply-To: <20210121212718.2441-1-andrew.cooper3@citrix.com>
From: Tamas K Lengyel <tamas.lengyel@intel.com>
Implement vmtrace_reset_pt function. Properly set IPT
state for VM forks.
Signed-off-by: Tamas K Lengyel <tamas.lengyel@intel.com>
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
---
CC: Jan Beulich <JBeulich@suse.com>
CC: Roger Pau Monné <roger.pau@citrix.com>
CC: Wei Liu <wl@xen.org>
CC: Jun Nakajima <jun.nakajima@intel.com>
CC: Kevin Tian <kevin.tian@intel.com>
CC: Michał Leszczyński <michal.leszczynski@cert.pl>
CC: Tamas K Lengyel <tamas@tklengyel.com>
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
next prev parent reply other threads:[~2021-01-21 21:28 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-21 21:27 [PATCH v7 00/10] Implement support for external IPT monitoring Andrew Cooper
2021-01-21 21:27 ` [PATCH v7 01/10] xen+tools: Introduce XEN_SYSCTL_PHYSCAP_vmtrace Andrew Cooper
2021-01-22 15:28 ` Ian Jackson
2021-01-26 8:58 ` Julien Grall
2021-01-26 10:04 ` Andrew Cooper
2021-01-21 21:27 ` [PATCH v7 02/10] xen/domain: Add vmtrace_frames domain creation parameter Andrew Cooper
2021-01-25 15:08 ` Jan Beulich
2021-01-25 17:17 ` Andrew Cooper
2021-01-26 10:51 ` Jan Beulich
2021-01-29 16:37 ` Jan Beulich
2021-01-21 21:27 ` [PATCH v7 03/10] tools/[lib]xl: Add vmtrace_buf_size parameter Andrew Cooper
2021-01-22 15:29 ` Ian Jackson
2021-01-21 21:27 ` [PATCH v7 04/10] xen/memory: Add a vmtrace_buf resource type Andrew Cooper
2021-01-25 16:31 ` Jan Beulich
2021-01-26 7:37 ` Jan Beulich
2021-01-26 9:58 ` Andrew Cooper
2021-01-26 10:30 ` Jan Beulich
2021-01-21 21:27 ` [PATCH v7 05/10] x86/vmx: Add Intel Processor Trace support Andrew Cooper
2021-01-26 13:35 ` Jan Beulich
2021-01-29 22:08 ` Andrew Cooper
2021-01-21 21:27 ` [PATCH v7 06/10] xen/domctl: Add XEN_DOMCTL_vmtrace_op Andrew Cooper
2021-01-26 14:18 ` Jan Beulich
2021-01-29 23:01 ` Andrew Cooper
2021-01-21 21:27 ` [PATCH v7 07/10] tools/libxc: Add xc_vmtrace_* functions Andrew Cooper
2021-01-22 15:29 ` Ian Jackson
2021-01-21 21:27 ` [PATCH v7 08/10] tools/misc: Add xen-vmtrace tool Andrew Cooper
2021-01-22 15:33 ` Ian Jackson
2021-01-25 15:30 ` Andrew Cooper
2021-01-26 11:59 ` Ian Jackson
2021-01-26 12:55 ` Andrew Cooper
2021-01-26 13:32 ` Ian Jackson
2021-01-26 15:59 ` Andrew Cooper
2021-01-21 21:27 ` Andrew Cooper [this message]
2021-01-26 14:21 ` [PATCH v7 09/10] xen/vmtrace: support for VM forks Jan Beulich
2021-01-27 15:50 ` Lengyel, Tamas
2021-01-21 21:27 ` [PATCH v7 10/10] x86/vm_event: Carry Processor Trace buffer offset in vm_event Andrew Cooper
2021-01-26 14:27 ` Jan Beulich
2021-01-29 23:22 ` Andrew Cooper
2021-01-29 23:40 ` Tamas K Lengyel
2021-02-01 8:55 ` Jan Beulich
2021-02-01 9:06 ` Andrew Cooper
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