From: Haozhong Zhang <haozhong.zhang@intel.com>
To: xen-devel@lists.xen.org, Jan Beulich <jbeulich@suse.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Kevin Tian <kevin.tian@intel.com>
Cc: Haozhong Zhang <haozhong.zhang@intel.com>,
Keir Fraser <keir@xen.org>,
Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>,
Jun Nakajima <jun.nakajima@intel.com>
Subject: [PATCH v3 12/13] vmx: Add VMX RDTSC(P) scaling support
Date: Thu, 31 Dec 2015 11:03:39 +0800 [thread overview]
Message-ID: <1451531020-29964-13-git-send-email-haozhong.zhang@intel.com> (raw)
In-Reply-To: <1451531020-29964-1-git-send-email-haozhong.zhang@intel.com>
This patch adds the initialization and setup code for VMX TSC scaling.
Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com>
Acked-by: Kevin Tian <kevin.tian@intel.com>
---
xen/arch/x86/hvm/vmx/vmcs.c | 12 +++++++++---
xen/arch/x86/hvm/vmx/vmx.c | 15 +++++++++++++++
xen/include/asm-x86/hvm/vmx/vmcs.h | 7 +++++++
3 files changed, 31 insertions(+), 3 deletions(-)
diff --git a/xen/arch/x86/hvm/vmx/vmcs.c b/xen/arch/x86/hvm/vmx/vmcs.c
index edd4c8d..8f16c3a 100644
--- a/xen/arch/x86/hvm/vmx/vmcs.c
+++ b/xen/arch/x86/hvm/vmx/vmcs.c
@@ -149,6 +149,7 @@ static void __init vmx_display_features(void)
P(cpu_has_vmx_vmfunc, "VM Functions");
P(cpu_has_vmx_virt_exceptions, "Virtualisation Exceptions");
P(cpu_has_vmx_pml, "Page Modification Logging");
+ P(cpu_has_vmx_tsc_scaling, "TSC Scaling");
#undef P
if ( !printed )
@@ -242,7 +243,8 @@ static int vmx_init_vmcs_config(void)
SECONDARY_EXEC_ENABLE_INVPCID |
SECONDARY_EXEC_ENABLE_VM_FUNCTIONS |
SECONDARY_EXEC_ENABLE_VIRT_EXCEPTIONS |
- SECONDARY_EXEC_XSAVES);
+ SECONDARY_EXEC_XSAVES |
+ SECONDARY_EXEC_TSC_SCALING);
rdmsrl(MSR_IA32_VMX_MISC, _vmx_misc_cap);
if ( _vmx_misc_cap & VMX_MISC_VMWRITE_ALL )
opt |= SECONDARY_EXEC_ENABLE_VMCS_SHADOWING;
@@ -999,7 +1001,7 @@ static int construct_vmcs(struct vcpu *v)
__vmwrite(PIN_BASED_VM_EXEC_CONTROL, vmx_pin_based_exec_control);
v->arch.hvm_vmx.exec_control = vmx_cpu_based_exec_control;
- if ( d->arch.vtsc )
+ if ( d->arch.vtsc && !cpu_has_vmx_tsc_scaling )
v->arch.hvm_vmx.exec_control |= CPU_BASED_RDTSC_EXITING;
v->arch.hvm_vmx.secondary_exec_control = vmx_secondary_exec_control;
@@ -1281,6 +1283,9 @@ static int construct_vmcs(struct vcpu *v)
if ( cpu_has_vmx_xsaves )
__vmwrite(XSS_EXIT_BITMAP, 0);
+ if ( cpu_has_vmx_tsc_scaling )
+ __vmwrite(TSC_MULTIPLIER, v->arch.hvm_vcpu.tsc_scaling_ratio);
+
vmx_vmcs_exit(v);
/* PVH: paging mode is updated by arch_set_info_guest(). */
@@ -1863,7 +1868,8 @@ void vmcs_dump_vcpu(struct vcpu *v)
vmr32(VM_EXIT_REASON), vmr(EXIT_QUALIFICATION));
printk("IDTVectoring: info=%08x errcode=%08x\n",
vmr32(IDT_VECTORING_INFO), vmr32(IDT_VECTORING_ERROR_CODE));
- printk("TSC Offset = 0x%016lx\n", vmr(TSC_OFFSET));
+ printk("TSC Offset = 0x%016lx TSC Multiplier = 0x%016lx\n",
+ vmr(TSC_OFFSET), vmr(TSC_MULTIPLIER));
if ( (v->arch.hvm_vmx.exec_control & CPU_BASED_TPR_SHADOW) ||
(vmx_pin_based_exec_control & PIN_BASED_POSTED_INTERRUPT) )
printk("TPR Threshold = 0x%02x PostedIntrVec = 0x%02x\n",
diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index f26a1bc..4c7214d 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -115,6 +115,7 @@ static int vmx_vcpu_initialise(struct vcpu *v)
v->arch.schedule_tail = vmx_do_resume;
v->arch.ctxt_switch_from = vmx_ctxt_switch_from;
v->arch.ctxt_switch_to = vmx_ctxt_switch_to;
+ v->arch.hvm_vcpu.tsc_scaling_ratio = VMX_TSC_MULTIPLIER_DEFAULT;
if ( (rc = vmx_create_vmcs(v)) != 0 )
{
@@ -1105,6 +1106,13 @@ static void vmx_handle_cd(struct vcpu *v, unsigned long value)
}
}
+static void vmx_setup_tsc_scaling(struct vcpu *v)
+{
+ vmx_vmcs_enter(v);
+ __vmwrite(TSC_MULTIPLIER, v->arch.hvm_vcpu.tsc_scaling_ratio);
+ vmx_vmcs_exit(v);
+}
+
static void vmx_set_tsc_offset(struct vcpu *v, u64 offset, u64 at_tsc)
{
vmx_vmcs_enter(v);
@@ -2003,6 +2011,10 @@ static struct hvm_function_table __initdata vmx_function_table = {
.altp2m_vcpu_update_vmfunc_ve = vmx_vcpu_update_vmfunc_ve,
.altp2m_vcpu_emulate_ve = vmx_vcpu_emulate_ve,
.altp2m_vcpu_emulate_vmfunc = vmx_vcpu_emulate_vmfunc,
+ .default_tsc_scaling_ratio = VMX_TSC_MULTIPLIER_DEFAULT,
+ .max_tsc_scaling_ratio = VMX_TSC_MULTIPLIER_MAX,
+ .tsc_scaling_ratio_frac_bits = 48,
+ .setup_tsc_scaling = vmx_setup_tsc_scaling,
};
/* Handle VT-d posted-interrupt when VCPU is running. */
@@ -2107,6 +2119,9 @@ const struct hvm_function_table * __init start_vmx(void)
&& cpu_has_vmx_secondary_exec_control )
vmx_function_table.pvh_supported = 1;
+ if ( cpu_has_vmx_tsc_scaling )
+ vmx_function_table.tsc_scaling_supported = 1;
+
setup_vmcs_dump();
return &vmx_function_table;
diff --git a/xen/include/asm-x86/hvm/vmx/vmcs.h b/xen/include/asm-x86/hvm/vmx/vmcs.h
index d1496b8..fdece44 100644
--- a/xen/include/asm-x86/hvm/vmx/vmcs.h
+++ b/xen/include/asm-x86/hvm/vmx/vmcs.h
@@ -236,6 +236,7 @@ extern u32 vmx_vmentry_control;
#define SECONDARY_EXEC_ENABLE_PML 0x00020000
#define SECONDARY_EXEC_ENABLE_VIRT_EXCEPTIONS 0x00040000
#define SECONDARY_EXEC_XSAVES 0x00100000
+#define SECONDARY_EXEC_TSC_SCALING 0x02000000
extern u32 vmx_secondary_exec_control;
#define VMX_EPT_EXEC_ONLY_SUPPORTED 0x00000001
@@ -258,6 +259,9 @@ extern u64 vmx_ept_vpid_cap;
#define VMX_MISC_CR3_TARGET 0x01ff0000
#define VMX_MISC_VMWRITE_ALL 0x20000000
+#define VMX_TSC_MULTIPLIER_DEFAULT 0x0001000000000000ULL
+#define VMX_TSC_MULTIPLIER_MAX 0xffffffffffffffffULL
+
#define cpu_has_wbinvd_exiting \
(vmx_secondary_exec_control & SECONDARY_EXEC_WBINVD_EXITING)
#define cpu_has_vmx_virtualize_apic_accesses \
@@ -303,6 +307,8 @@ extern u64 vmx_ept_vpid_cap;
(vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_PML)
#define cpu_has_vmx_xsaves \
(vmx_secondary_exec_control & SECONDARY_EXEC_XSAVES)
+#define cpu_has_vmx_tsc_scaling \
+ (vmx_secondary_exec_control & SECONDARY_EXEC_TSC_SCALING)
#define VMCS_RID_TYPE_MASK 0x80000000
@@ -378,6 +384,7 @@ enum vmcs_field {
VMWRITE_BITMAP = 0x00002028,
VIRT_EXCEPTION_INFO = 0x0000202a,
XSS_EXIT_BITMAP = 0x0000202c,
+ TSC_MULTIPLIER = 0x00002032,
GUEST_PHYSICAL_ADDRESS = 0x00002400,
VMCS_LINK_POINTER = 0x00002800,
GUEST_IA32_DEBUGCTL = 0x00002802,
--
2.4.8
next prev parent reply other threads:[~2015-12-31 3:03 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-31 3:03 [PATCH v3 00/13] Add VMX TSC scaling support Haozhong Zhang
2015-12-31 3:03 ` [PATCH v3 01/13] x86/time.c: Use correct guest TSC frequency in tsc_set_info() Haozhong Zhang
2016-01-04 17:44 ` Boris Ostrovsky
2015-12-31 3:03 ` [PATCH v3 02/13] x86/time.c: Use correct guest TSC frequency in tsc_get_info() Haozhong Zhang
2016-01-04 17:48 ` Boris Ostrovsky
2016-01-05 0:32 ` Haozhong Zhang
2016-01-08 9:05 ` Jan Beulich
2016-01-08 9:12 ` Haozhong Zhang
2015-12-31 3:03 ` [PATCH v3 03/13] x86/hvm: Scale host TSC when setting/getting guest TSC Haozhong Zhang
2016-01-08 9:15 ` Jan Beulich
2016-01-08 14:04 ` Haozhong Zhang
2015-12-31 3:03 ` [PATCH v3 04/13] x86/time.c: Scale host TSC in pvclock properly Haozhong Zhang
2016-01-04 18:09 ` Boris Ostrovsky
2016-01-05 0:59 ` Haozhong Zhang
2016-01-05 16:15 ` Boris Ostrovsky
2016-01-06 0:56 ` Haozhong Zhang
2016-01-08 9:20 ` Jan Beulich
2016-01-08 13:22 ` Haozhong Zhang
2016-01-08 13:43 ` Jan Beulich
2016-01-08 13:50 ` Haozhong Zhang
2015-12-31 3:03 ` [PATCH v3 05/13] svm: Remove redundant TSC scaling in svm_set_tsc_offset() Haozhong Zhang
2016-01-08 9:22 ` Jan Beulich
2016-01-08 13:24 ` Haozhong Zhang
2015-12-31 3:03 ` [PATCH v3 06/13] x86/hvm: Collect information of TSC scaling ratio Haozhong Zhang
2015-12-31 3:03 ` [PATCH v3 07/13] x86: Add functions for 64-bit integer arithmetic Haozhong Zhang
2016-01-04 18:26 ` Boris Ostrovsky
2016-01-05 1:15 ` Haozhong Zhang
2016-01-05 16:21 ` Boris Ostrovsky
2016-01-08 9:34 ` Jan Beulich
2016-01-08 13:48 ` Haozhong Zhang
2015-12-31 3:03 ` [PATCH v3 08/13] x86/hvm: Setup TSC scaling ratio Haozhong Zhang
2016-01-04 18:40 ` Boris Ostrovsky
2016-01-05 1:20 ` Haozhong Zhang
2016-01-08 9:44 ` Jan Beulich
2016-01-08 13:55 ` Haozhong Zhang
2016-01-08 14:04 ` Jan Beulich
2016-01-08 14:10 ` Haozhong Zhang
2015-12-31 3:03 ` [PATCH v3 09/13] x86/hvm: Replace architecture TSC scaling by a common function Haozhong Zhang
2016-01-04 18:42 ` Boris Ostrovsky
2016-01-12 16:44 ` Jan Beulich
2015-12-31 3:03 ` [PATCH v3 10/13] x86/hvm: Move saving/loading vcpu's TSC to common code Haozhong Zhang
2015-12-31 3:03 ` [PATCH v3 11/13] x86/hvm: Detect TSC scaling through hvm_funcs Haozhong Zhang
2015-12-31 3:03 ` Haozhong Zhang [this message]
2016-01-12 16:48 ` [PATCH v3 12/13] vmx: Add VMX RDTSC(P) scaling support Jan Beulich
2016-01-14 4:52 ` Haozhong Zhang
2016-01-14 9:05 ` Jan Beulich
2016-01-14 9:47 ` Haozhong Zhang
2015-12-31 3:03 ` [PATCH v3 13/13] docs: Add descriptions of TSC scaling in xl.cfg and tscmode.txt Haozhong Zhang
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