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* [PATCH v4 00/19] x86/cpu: Clean up handling of VMX features
@ 2019-11-28  1:39 Sean Christopherson
  2019-11-28  1:39 ` [PATCH v4 01/19] x86/msr-index: Clean up bit defines for IA32_FEATURE_CONTROL MSR Sean Christopherson
                   ` (18 more replies)
  0 siblings, 19 replies; 23+ messages in thread
From: Sean Christopherson @ 2019-11-28  1:39 UTC (permalink / raw)
  To: Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86
  Cc: H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan,
	linux-kernel, kvm, linux-edac, linux-pm, linux-kselftest,
	Borislav Petkov, Jarkko Sakkinen

Clean up a handful of interrelated warts in the kernel's handling of VMX:

  - Enable VMX in IA32_FEATURE_CONTROL during boot instead of on-demand
    during KVM load to avoid future contention over IA32_FEATURE_CONTROL.

  - Rework VMX feature reporting so that it is accurate and up-to-date,
    now and in the future.

  - Consolidate code across CPUs that support VMX.

This series stems from two separate but related issues.  The first issue,
pointed out by Boris in the SGX enabling series[1], is that the kernel
currently doesn't ensure the IA32_FEATURE_CONTROL MSR is configured during
boot.  The second issue is that the kernel's reporting of VMX features is
stale, potentially inaccurate, and difficult to maintain.

v4:
  - Rebase to tip/master, 8a1b070333f4 ("Merge branch 'WIP.x86/mm'")
  - Rename everything feature control related to IA32_FEAT_CTL. [Boris]
  - Minor coding style tweaks [Boris and Jarkko].
  - Print VMX feature flags in "vmx flags" to avoid polluting "flags",
    but keep printing the current synthetic VMX in "flags" so as not to
    break the ABI. [Boris]
  - Don't bother printing an error message in the extremely unlikely
    event VMX is supported but IA32_FEAT_CTL doesn't exist. [Boris]
  - Beef up a few changelogs and comments. [Boris]
  - Add a comment in the LMCE code for the new WARN. [Jarkko]
  - Check CONFIG_KVM_INTEL instead of CONFIG_KVM when deciding whether
    or not to enable VMX.
  - Add a patch to introduce X86_FEATURE_MSR_IA32_FEAT_CTL.
  - Dropped Jim's Reviewed-by from a few KVM patches due to the above
    addition.

v3:
  - Rebase to tip/master, ceceaf1f12ba ("Merge branch 'WIP.x86/cleanups'").
  - Rename the feature control MSR bit defines [Boris].
  - Rewrite the error message displayed when reading feature control MSR
    faults on a VMX capable CPU to explicitly state that it's likely a
    hardware or hypervisor issue [Boris].
  - Collect a Reviewed-by for the LMCE change [Boris].
  - Enable VMX in feature control (if it's unlocked) if and only if
    KVM is enabled [Paolo].
  - Remove a big pile of redudant MSR defines from the KVM selftests that
    was discovered when renaming the feature control defines.
  - Fix a changelog typoe [Boris].

v2:
  - Rebase to latest tip/x86/cpu (1edae1ae6258, "x86/Kconfig: Enforce...)
  - Collect Jim's reviews.
  - Fix a typo in setting of EPT capabilities [TonyWWang-oc].
  - Remove defines for reserved VMX feature flags [Paolo].
  - Print the VMX features under "flags" and maintain all existing names
    to be backward compatible with the ABI [Paolo].
  - Create aggregate APIC features to report FLEXPRIORITY and APICV, so
    that the full feature *and* their associated individual features are
    printed, e.g. to aid in recognizing why an APIC feature isn't being
    used.
  - Fix a few copy paste errors in changelogs.


v1 cover letter:

== IA32_FEATURE_CONTROL ==
Lack of IA32_FEATURE_CONTROL configuration during boot isn't a functional
issue in the current kernel as the majority of platforms set and lock
IA32_FEATURE_CONTROL in firmware.  And when the MSR is left unlocked, KVM
is the only subsystem that writes IA32_FEATURE_CONTROL.  That will change
if/when SGX support is enabled, as SGX will also want to fully enable
itself when IA32_FEATURE_CONTROL is unlocked.

== VMX Feature Reporting ==
VMX features are not enumerated via CPUID, but instead are enumerated
through VMX MSRs.  As a result, new VMX features are not automatically
reported via /proc/cpuinfo.

An attempt was made long ago to report interesting and/or meaningful VMX
features by synthesizing select features into a Linux-defined cpufeatures
word.  Synthetic feature flags worked for the initial purpose, but the
existence of the synthetic flags was forgotten almost immediately, e.g.
only one new flag (EPT A/D) has been added in the the decade since the
synthetic VMX features were introduced, while VMX and KVM have gained
support for many new features.

Placing the synthetic flags in x86_capability also allows them to be
queried via cpu_has() and company, which is misleading as the flags exist
purely for reporting via /proc/cpuinfo.  KVM, the only in-kernel user of
VMX, ignores the flags.

Last but not least, VMX features are reported in /proc/cpuinfo even
when VMX is unusable due to lack of enabling in IA32_FEATURE_CONTROL.

== Caveats ==
All of the testing of non-standard flows was done in a VM, as I don't
have a system that leaves IA32_FEATURE_CONTROL unlocked, or locks it with
VMX disabled.

The Centaur and Zhaoxin changes are somewhat speculative, as I haven't
confirmed they actually support IA32_FEATURE_CONTROL, or that they want to
gain "official" KVM support.  I assume they unofficially support KVM given
that both CPUs went through the effort of enumerating VMX features.  That
in turn would require them to support IA32_FEATURE_CONTROL since KVM will
fault and refuse to load if the MSR doesn't exist.

[1] https://lkml.kernel.org/r/20190925085156.GA3891@zn.tnic

Sean Christopherson (19):
  x86/msr-index: Clean up bit defines for IA32_FEATURE_CONTROL MSR
  selftests: kvm: Replace manual MSR defs with common msr-index.h
  tools arch x86: Sync msr-index.h from kernel sources
  x86/intel: Initialize IA32_FEAT_CTL MSR at boot
  x86/mce: WARN once if IA32_FEAT_CTL MSR is left unlocked
  x86/centaur: Use common IA32_FEAT_CTL MSR initialization
  x86/zhaoxin: Use common IA32_FEAT_CTL MSR initialization
  x86/cpu: Clear VMX feature flag if VMX is not fully enabled
  x86/vmx: Introduce VMX_FEATURES_*
  x86/cpu: Detect VMX features on Intel, Centaur and Zhaoxin CPUs
  x86/cpu: Print VMX flags in /proc/cpuinfo using VMX_FEATURES_*
  x86/cpu: Set synthetic VMX cpufeatures during init_ia32_feat_ctl()
  x86/cpufeatures: Add flag to track whether MSR IA32_FEAT_CTL is
    configured
  KVM: VMX: Drop initialization of IA32_FEAT_CTL MSR
  KVM: VMX: Use VMX feature flag to query BIOS enabling
  KVM: VMX: Check for full VMX support when verifying CPU compatibility
  KVM: VMX: Use VMX_FEATURE_* flags to define VMCS control bits
  perf/x86: Provide stubs of KVM helpers for non-Intel CPUs
  KVM: VMX: Allow KVM_INTEL when building for Centaur and/or Zhaoxin
    CPUs

 MAINTAINERS                                   |   2 +-
 arch/x86/Kconfig.cpu                          |   8 +
 arch/x86/boot/mkcpustr.c                      |   1 +
 arch/x86/include/asm/cpufeatures.h            |   1 +
 arch/x86/include/asm/msr-index.h              |  14 +-
 arch/x86/include/asm/perf_event.h             |  22 +-
 arch/x86/include/asm/processor.h              |   4 +
 arch/x86/include/asm/vmx.h                    | 105 +--
 arch/x86/include/asm/vmxfeatures.h            |  86 +++
 arch/x86/kernel/cpu/Makefile                  |   6 +-
 arch/x86/kernel/cpu/centaur.c                 |  35 +-
 arch/x86/kernel/cpu/common.c                  |   3 +
 arch/x86/kernel/cpu/cpu.h                     |   4 +
 arch/x86/kernel/cpu/feat_ctl.c                | 140 ++++
 arch/x86/kernel/cpu/intel.c                   |  49 +-
 arch/x86/kernel/cpu/mce/intel.c               |  15 +-
 arch/x86/kernel/cpu/mkcapflags.sh             |  15 +-
 arch/x86/kernel/cpu/proc.c                    |  15 +
 arch/x86/kernel/cpu/zhaoxin.c                 |  35 +-
 arch/x86/kvm/Kconfig                          |  10 +-
 arch/x86/kvm/vmx/nested.c                     |   4 +-
 arch/x86/kvm/vmx/vmx.c                        |  67 +-
 arch/x86/kvm/vmx/vmx.h                        |   2 +-
 arch/x86/kvm/x86.c                            |   2 +-
 tools/arch/x86/include/asm/msr-index.h        |  30 +-
 tools/power/x86/turbostat/turbostat.c         |   4 +-
 tools/testing/selftests/kvm/Makefile          |   4 +-
 .../selftests/kvm/include/x86_64/processor.h  | 726 +-----------------
 tools/testing/selftests/kvm/lib/x86_64/vmx.c  |   8 +-
 29 files changed, 431 insertions(+), 986 deletions(-)
 create mode 100644 arch/x86/include/asm/vmxfeatures.h
 create mode 100644 arch/x86/kernel/cpu/feat_ctl.c

-- 
2.24.0


^ permalink raw reply	[flat|nested] 23+ messages in thread

* [PATCH v4 01/19] x86/msr-index: Clean up bit defines for IA32_FEATURE_CONTROL MSR
  2019-11-28  1:39 [PATCH v4 00/19] x86/cpu: Clean up handling of VMX features Sean Christopherson
@ 2019-11-28  1:39 ` Sean Christopherson
  2019-11-28 21:07   ` kbuild test robot
  2019-11-30 20:52   ` kbuild test robot
  2019-11-28  1:39 ` [PATCH v4 02/19] selftests: kvm: Replace manual MSR defs with common msr-index.h Sean Christopherson
                   ` (17 subsequent siblings)
  18 siblings, 2 replies; 23+ messages in thread
From: Sean Christopherson @ 2019-11-28  1:39 UTC (permalink / raw)
  To: Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86
  Cc: H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan,
	linux-kernel, kvm, linux-edac, linux-pm, linux-kselftest,
	Borislav Petkov, Jarkko Sakkinen

As pointed out by Boris, the defines for bits in IA32_FEATURE_CONTROL
are quite a mouthful, especially the VMX bits which must differentiate
between enabling VMX inside and outside SMX (TXT) operation.  Rename the
MSR and its bit defines to abbreviate FEATURE_CONTROL as FEAT_CTL to
make them a little friendlier on the eyes.

Arguably the MSR itself should keep the full IA32_FEATURE_CONTROL name
to match Intel's SDM, but a future patch will add a dedicated Kconfig,
file and functions for the MSR.  Using the full name for those assets is
rather unwieldy, so bite the bullet and use IA32_FEAT_CTL so that its
nomenclature is consistent throughout the kernel.

Opportunistically fix a few other annoyances with the defines:

  - Relocate the bit defines so that they immediately follow the MSR
    define, e.g. aren't mistaken as belonging to MISC_FEATURE_CONTROL.
  - Add whitespace around the block of feature control defines to make
    it clear they're all related.
  - Use BIT() instead of manually encoding the bit shift.
  - Use "VMX" instead of "VMXON" to match the SDM.
  - Append "_ENABLED" to the LMCE (Local Machine Check Exception) bit to
    be consistent with the kernel's verbiage used for all other feature
    control bits.  Note, the SDM refers to the LMCE bit as LMCE_ON,
    likely to differentiate it from IA32_MCG_EXT_CTL.LMCE_EN.  Ignore
    the (literal) one-off usage of _ON, the SDM is simply "wrong".

Cc: Borislav Petkov <bp@alien8.de>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/include/asm/msr-index.h | 14 +++++-----
 arch/x86/kernel/cpu/mce/intel.c  | 10 +++----
 arch/x86/kvm/vmx/nested.c        |  4 +--
 arch/x86/kvm/vmx/vmx.c           | 46 ++++++++++++++++----------------
 arch/x86/kvm/vmx/vmx.h           |  2 +-
 arch/x86/kvm/x86.c               |  2 +-
 6 files changed, 40 insertions(+), 38 deletions(-)

diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
index 084e98da04a7..ebe1685e92dd 100644
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -558,7 +558,14 @@
 #define MSR_IA32_EBL_CR_POWERON		0x0000002a
 #define MSR_EBC_FREQUENCY_ID		0x0000002c
 #define MSR_SMI_COUNT			0x00000034
-#define MSR_IA32_FEATURE_CONTROL        0x0000003a
+
+/* Referred to as IA32_FEATURE_CONTROL in Intel's SDM. */
+#define MSR_IA32_FEAT_CTL		0x0000003a
+#define FEAT_CTL_LOCKED				BIT(0)
+#define FEAT_CTL_VMX_ENABLED_INSIDE_SMX		BIT(1)
+#define FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX	BIT(2)
+#define FEAT_CTL_LMCE_ENABLED			BIT(20)
+
 #define MSR_IA32_TSC_ADJUST             0x0000003b
 #define MSR_IA32_BNDCFGS		0x00000d90
 
@@ -566,11 +573,6 @@
 
 #define MSR_IA32_XSS			0x00000da0
 
-#define FEATURE_CONTROL_LOCKED				(1<<0)
-#define FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX	(1<<1)
-#define FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX	(1<<2)
-#define FEATURE_CONTROL_LMCE				(1<<20)
-
 #define MSR_IA32_APICBASE		0x0000001b
 #define MSR_IA32_APICBASE_BSP		(1<<8)
 #define MSR_IA32_APICBASE_ENABLE	(1<<11)
diff --git a/arch/x86/kernel/cpu/mce/intel.c b/arch/x86/kernel/cpu/mce/intel.c
index e270d0770134..c238518b84a2 100644
--- a/arch/x86/kernel/cpu/mce/intel.c
+++ b/arch/x86/kernel/cpu/mce/intel.c
@@ -115,12 +115,12 @@ static bool lmce_supported(void)
 
 	/*
 	 * BIOS should indicate support for LMCE by setting bit 20 in
-	 * IA32_FEATURE_CONTROL without which touching MCG_EXT_CTL will
-	 * generate a #GP fault.
+	 * IA32_FEAT_CTL without which touching MCG_EXT_CTL will generate a #GP
+	 * fault.
 	 */
-	rdmsrl(MSR_IA32_FEATURE_CONTROL, tmp);
-	if ((tmp & (FEATURE_CONTROL_LOCKED | FEATURE_CONTROL_LMCE)) ==
-		   (FEATURE_CONTROL_LOCKED | FEATURE_CONTROL_LMCE))
+	rdmsrl(MSR_IA32_FEAT_CTL, tmp);
+	if ((tmp & (FEAT_CTL_LOCKED | FEAT_CTL_LMCE_ENABLED)) ==
+		   (FEAT_CTL_LOCKED | FEAT_CTL_LMCE_ENABLED))
 		return true;
 
 	return false;
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 4aea7d304beb..6879966b7648 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -4588,8 +4588,8 @@ static int handle_vmon(struct kvm_vcpu *vcpu)
 	gpa_t vmptr;
 	uint32_t revision;
 	struct vcpu_vmx *vmx = to_vmx(vcpu);
-	const u64 VMXON_NEEDED_FEATURES = FEATURE_CONTROL_LOCKED
-		| FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX;
+	const u64 VMXON_NEEDED_FEATURES = FEAT_CTL_LOCKED
+		| FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX;
 
 	/*
 	 * The Intel VMX Instruction Reference lists a bunch of bits that are
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 1b9ab4166397..ecf3ccf71bb2 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -1839,11 +1839,11 @@ static int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
 	case MSR_IA32_MCG_EXT_CTL:
 		if (!msr_info->host_initiated &&
 		    !(vmx->msr_ia32_feature_control &
-		      FEATURE_CONTROL_LMCE))
+		      FEAT_CTL_LMCE_ENABLED))
 			return 1;
 		msr_info->data = vcpu->arch.mcg_ext_ctl;
 		break;
-	case MSR_IA32_FEATURE_CONTROL:
+	case MSR_IA32_FEAT_CTL:
 		msr_info->data = vmx->msr_ia32_feature_control;
 		break;
 	case MSR_IA32_VMX_BASIC ... MSR_IA32_VMX_VMFUNC:
@@ -2074,15 +2074,15 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
 	case MSR_IA32_MCG_EXT_CTL:
 		if ((!msr_info->host_initiated &&
 		     !(to_vmx(vcpu)->msr_ia32_feature_control &
-		       FEATURE_CONTROL_LMCE)) ||
+		       FEAT_CTL_LMCE_ENABLED)) ||
 		    (data & ~MCG_EXT_CTL_LMCE_EN))
 			return 1;
 		vcpu->arch.mcg_ext_ctl = data;
 		break;
-	case MSR_IA32_FEATURE_CONTROL:
+	case MSR_IA32_FEAT_CTL:
 		if (!vmx_feature_control_msr_valid(vcpu, data) ||
 		    (to_vmx(vcpu)->msr_ia32_feature_control &
-		     FEATURE_CONTROL_LOCKED && !msr_info->host_initiated))
+		     FEAT_CTL_LOCKED && !msr_info->host_initiated))
 			return 1;
 		vmx->msr_ia32_feature_control = data;
 		if (msr_info->host_initiated && data == 0)
@@ -2206,22 +2206,22 @@ static __init int vmx_disabled_by_bios(void)
 {
 	u64 msr;
 
-	rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
-	if (msr & FEATURE_CONTROL_LOCKED) {
+	rdmsrl(MSR_IA32_FEAT_CTL, msr);
+	if (msr & FEAT_CTL_LOCKED) {
 		/* launched w/ TXT and VMX disabled */
-		if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX)
+		if (!(msr & FEAT_CTL_VMX_ENABLED_INSIDE_SMX)
 			&& tboot_enabled())
 			return 1;
 		/* launched w/o TXT and VMX only enabled w/ TXT */
-		if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX)
-			&& (msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX)
+		if (!(msr & FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX)
+			&& (msr & FEAT_CTL_VMX_ENABLED_INSIDE_SMX)
 			&& !tboot_enabled()) {
 			printk(KERN_WARNING "kvm: disable TXT in the BIOS or "
 				"activate TXT before enabling KVM\n");
 			return 1;
 		}
 		/* launched w/o TXT and VMX disabled */
-		if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX)
+		if (!(msr & FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX)
 			&& !tboot_enabled())
 			return 1;
 	}
@@ -2269,16 +2269,16 @@ static int hardware_enable(void)
 	 */
 	crash_enable_local_vmclear(cpu);
 
-	rdmsrl(MSR_IA32_FEATURE_CONTROL, old);
+	rdmsrl(MSR_IA32_FEAT_CTL, old);
 
-	test_bits = FEATURE_CONTROL_LOCKED;
-	test_bits |= FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX;
+	test_bits = FEAT_CTL_LOCKED;
+	test_bits |= FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX;
 	if (tboot_enabled())
-		test_bits |= FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX;
+		test_bits |= FEAT_CTL_VMX_ENABLED_INSIDE_SMX;
 
 	if ((old & test_bits) != test_bits) {
 		/* enable and lock */
-		wrmsrl(MSR_IA32_FEATURE_CONTROL, old | test_bits);
+		wrmsrl(MSR_IA32_FEAT_CTL, old | test_bits);
 	}
 	kvm_cpu_vmxon(phys_addr);
 	if (enable_ept)
@@ -6807,7 +6807,7 @@ static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
 	vmx->nested.posted_intr_nv = -1;
 	vmx->nested.current_vmptr = -1ull;
 
-	vmx->msr_ia32_feature_control_valid_bits = FEATURE_CONTROL_LOCKED;
+	vmx->msr_ia32_feature_control_valid_bits = FEAT_CTL_LOCKED;
 
 	/*
 	 * Enforce invariant: pi_desc.nv is always either POSTED_INTR_VECTOR
@@ -7107,12 +7107,12 @@ static void vmx_cpuid_update(struct kvm_vcpu *vcpu)
 
 	if (nested_vmx_allowed(vcpu))
 		to_vmx(vcpu)->msr_ia32_feature_control_valid_bits |=
-			FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX |
-			FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX;
+			FEAT_CTL_VMX_ENABLED_INSIDE_SMX |
+			FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX;
 	else
 		to_vmx(vcpu)->msr_ia32_feature_control_valid_bits &=
-			~(FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX |
-			  FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX);
+			~(FEAT_CTL_VMX_ENABLED_INSIDE_SMX |
+			  FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX);
 
 	if (nested_vmx_allowed(vcpu)) {
 		nested_vmx_cr_fixed1_bits_update(vcpu);
@@ -7531,10 +7531,10 @@ static void vmx_setup_mce(struct kvm_vcpu *vcpu)
 {
 	if (vcpu->arch.mcg_cap & MCG_LMCE_P)
 		to_vmx(vcpu)->msr_ia32_feature_control_valid_bits |=
-			FEATURE_CONTROL_LMCE;
+			FEAT_CTL_LMCE_ENABLED;
 	else
 		to_vmx(vcpu)->msr_ia32_feature_control_valid_bits &=
-			~FEATURE_CONTROL_LMCE;
+			~FEAT_CTL_LMCE_ENABLED;
 }
 
 static int vmx_smi_allowed(struct kvm_vcpu *vcpu)
diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
index 7c1b978b2df4..b2c87f6be987 100644
--- a/arch/x86/kvm/vmx/vmx.h
+++ b/arch/x86/kvm/vmx/vmx.h
@@ -283,7 +283,7 @@ struct vcpu_vmx {
 
 	/*
 	 * Only bits masked by msr_ia32_feature_control_valid_bits can be set in
-	 * msr_ia32_feature_control. FEATURE_CONTROL_LOCKED is always included
+	 * msr_ia32_feature_control. FEAT_CTL_LOCKED is always included
 	 * in msr_ia32_feature_control_valid_bits.
 	 */
 	u64 msr_ia32_feature_control;
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index cf917139de6b..740d3ee42455 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1142,7 +1142,7 @@ static const u32 msrs_to_save_all[] = {
 	MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
 #endif
 	MSR_IA32_TSC, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA,
-	MSR_IA32_FEATURE_CONTROL, MSR_IA32_BNDCFGS, MSR_TSC_AUX,
+	MSR_IA32_FEAT_CTL, MSR_IA32_BNDCFGS, MSR_TSC_AUX,
 	MSR_IA32_SPEC_CTRL,
 	MSR_IA32_RTIT_CTL, MSR_IA32_RTIT_STATUS, MSR_IA32_RTIT_CR3_MATCH,
 	MSR_IA32_RTIT_OUTPUT_BASE, MSR_IA32_RTIT_OUTPUT_MASK,
-- 
2.24.0


^ permalink raw reply	[flat|nested] 23+ messages in thread

* [PATCH v4 02/19] selftests: kvm: Replace manual MSR defs with common msr-index.h
  2019-11-28  1:39 [PATCH v4 00/19] x86/cpu: Clean up handling of VMX features Sean Christopherson
  2019-11-28  1:39 ` [PATCH v4 01/19] x86/msr-index: Clean up bit defines for IA32_FEATURE_CONTROL MSR Sean Christopherson
@ 2019-11-28  1:39 ` Sean Christopherson
  2019-11-28  1:40 ` [PATCH v4 03/19] tools arch x86: Sync msr-index.h from kernel sources Sean Christopherson
                   ` (16 subsequent siblings)
  18 siblings, 0 replies; 23+ messages in thread
From: Sean Christopherson @ 2019-11-28  1:39 UTC (permalink / raw)
  To: Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86
  Cc: H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan,
	linux-kernel, kvm, linux-edac, linux-pm, linux-kselftest,
	Borislav Petkov, Jarkko Sakkinen

The kernel's version of msr-index.h was pulled wholesale into tools by
commit 444e2ff34df8 ("tools arch x86: Grab a copy of the file containing
the MSR numbers"), use the common msr-index.h instead of manually
redefining everything in a KVM-only header.

Note, a few MSR related definitions remain in processor.h because they
are not covered by msr-index.h, including the awesomely named
APIC_BASE_MSR, which refers to starting index of the x2APIC MSRs, not
the actual MSR_IA32_APICBASE, which *is* defined by msr-index.h.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 tools/testing/selftests/kvm/Makefile          |   4 +-
 .../selftests/kvm/include/x86_64/processor.h  | 726 +-----------------
 2 files changed, 6 insertions(+), 724 deletions(-)

diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index 3138a916574a..608fa835c764 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -45,9 +45,11 @@ LIBKVM += $(LIBKVM_$(UNAME_M))
 INSTALL_HDR_PATH = $(top_srcdir)/usr
 LINUX_HDR_PATH = $(INSTALL_HDR_PATH)/include/
 LINUX_TOOL_INCLUDE = $(top_srcdir)/tools/include
+LINUX_TOOL_ARCH_INCLUDE = $(top_srcdir)/tools/arch/x86/include
 CFLAGS += -Wall -Wstrict-prototypes -Wuninitialized -O2 -g -std=gnu99 \
 	-fno-stack-protector -fno-PIE -I$(LINUX_TOOL_INCLUDE) \
-	-I$(LINUX_HDR_PATH) -Iinclude -I$(<D) -Iinclude/$(UNAME_M) -I..
+	-I$(LINUX_TOOL_ARCH_INCLUDE) -I$(LINUX_HDR_PATH) -Iinclude \
+	-I$(<D) -Iinclude/$(UNAME_M) -I..
 
 no-pie-option := $(call try-run, echo 'int main() { return 0; }' | \
         $(CC) -Werror -no-pie -x c - -o "$$TMP", -no-pie)
diff --git a/tools/testing/selftests/kvm/include/x86_64/processor.h b/tools/testing/selftests/kvm/include/x86_64/processor.h
index 635ee6c33ad2..aa6451b3f740 100644
--- a/tools/testing/selftests/kvm/include/x86_64/processor.h
+++ b/tools/testing/selftests/kvm/include/x86_64/processor.h
@@ -11,6 +11,8 @@
 #include <assert.h>
 #include <stdint.h>
 
+#include <asm/msr-index.h>
+
 #define X86_EFLAGS_FIXED	 (1u << 1)
 
 #define X86_CR4_VME		(1ul << 0)
@@ -348,444 +350,6 @@ void kvm_get_cpu_address_width(unsigned int *pa_bits, unsigned int *va_bits);
 #define X86_CR0_CD          (1UL<<30) /* Cache Disable */
 #define X86_CR0_PG          (1UL<<31) /* Paging */
 
-/*
- * CPU model specific register (MSR) numbers.
- */
-
-/* x86-64 specific MSRs */
-#define MSR_EFER		0xc0000080 /* extended feature register */
-#define MSR_STAR		0xc0000081 /* legacy mode SYSCALL target */
-#define MSR_LSTAR		0xc0000082 /* long mode SYSCALL target */
-#define MSR_CSTAR		0xc0000083 /* compat mode SYSCALL target */
-#define MSR_SYSCALL_MASK	0xc0000084 /* EFLAGS mask for syscall */
-#define MSR_FS_BASE		0xc0000100 /* 64bit FS base */
-#define MSR_GS_BASE		0xc0000101 /* 64bit GS base */
-#define MSR_KERNEL_GS_BASE	0xc0000102 /* SwapGS GS shadow */
-#define MSR_TSC_AUX		0xc0000103 /* Auxiliary TSC */
-
-/* EFER bits: */
-#define EFER_SCE		(1<<0)  /* SYSCALL/SYSRET */
-#define EFER_LME		(1<<8)  /* Long mode enable */
-#define EFER_LMA		(1<<10) /* Long mode active (read-only) */
-#define EFER_NX			(1<<11) /* No execute enable */
-#define EFER_SVME		(1<<12) /* Enable virtualization */
-#define EFER_LMSLE		(1<<13) /* Long Mode Segment Limit Enable */
-#define EFER_FFXSR		(1<<14) /* Enable Fast FXSAVE/FXRSTOR */
-
-/* Intel MSRs. Some also available on other CPUs */
-
-#define MSR_PPIN_CTL			0x0000004e
-#define MSR_PPIN			0x0000004f
-
-#define MSR_IA32_PERFCTR0		0x000000c1
-#define MSR_IA32_PERFCTR1		0x000000c2
-#define MSR_FSB_FREQ			0x000000cd
-#define MSR_PLATFORM_INFO		0x000000ce
-#define MSR_PLATFORM_INFO_CPUID_FAULT_BIT	31
-#define MSR_PLATFORM_INFO_CPUID_FAULT		BIT_ULL(MSR_PLATFORM_INFO_CPUID_FAULT_BIT)
-
-#define MSR_PKG_CST_CONFIG_CONTROL	0x000000e2
-#define NHM_C3_AUTO_DEMOTE		(1UL << 25)
-#define NHM_C1_AUTO_DEMOTE		(1UL << 26)
-#define ATM_LNC_C6_AUTO_DEMOTE		(1UL << 25)
-#define SNB_C1_AUTO_UNDEMOTE		(1UL << 27)
-#define SNB_C3_AUTO_UNDEMOTE		(1UL << 28)
-
-#define MSR_MTRRcap			0x000000fe
-#define MSR_IA32_BBL_CR_CTL		0x00000119
-#define MSR_IA32_BBL_CR_CTL3		0x0000011e
-
-#define MSR_IA32_SYSENTER_CS		0x00000174
-#define MSR_IA32_SYSENTER_ESP		0x00000175
-#define MSR_IA32_SYSENTER_EIP		0x00000176
-
-#define MSR_IA32_MCG_CAP		0x00000179
-#define MSR_IA32_MCG_STATUS		0x0000017a
-#define MSR_IA32_MCG_CTL		0x0000017b
-#define MSR_IA32_MCG_EXT_CTL		0x000004d0
-
-#define MSR_OFFCORE_RSP_0		0x000001a6
-#define MSR_OFFCORE_RSP_1		0x000001a7
-#define MSR_TURBO_RATIO_LIMIT		0x000001ad
-#define MSR_TURBO_RATIO_LIMIT1		0x000001ae
-#define MSR_TURBO_RATIO_LIMIT2		0x000001af
-
-#define MSR_LBR_SELECT			0x000001c8
-#define MSR_LBR_TOS			0x000001c9
-#define MSR_LBR_NHM_FROM		0x00000680
-#define MSR_LBR_NHM_TO			0x000006c0
-#define MSR_LBR_CORE_FROM		0x00000040
-#define MSR_LBR_CORE_TO			0x00000060
-
-#define MSR_LBR_INFO_0			0x00000dc0 /* ... 0xddf for _31 */
-#define LBR_INFO_MISPRED		BIT_ULL(63)
-#define LBR_INFO_IN_TX			BIT_ULL(62)
-#define LBR_INFO_ABORT			BIT_ULL(61)
-#define LBR_INFO_CYCLES			0xffff
-
-#define MSR_IA32_PEBS_ENABLE		0x000003f1
-#define MSR_IA32_DS_AREA		0x00000600
-#define MSR_IA32_PERF_CAPABILITIES	0x00000345
-#define MSR_PEBS_LD_LAT_THRESHOLD	0x000003f6
-
-#define MSR_IA32_RTIT_CTL		0x00000570
-#define MSR_IA32_RTIT_STATUS		0x00000571
-#define MSR_IA32_RTIT_ADDR0_A		0x00000580
-#define MSR_IA32_RTIT_ADDR0_B		0x00000581
-#define MSR_IA32_RTIT_ADDR1_A		0x00000582
-#define MSR_IA32_RTIT_ADDR1_B		0x00000583
-#define MSR_IA32_RTIT_ADDR2_A		0x00000584
-#define MSR_IA32_RTIT_ADDR2_B		0x00000585
-#define MSR_IA32_RTIT_ADDR3_A		0x00000586
-#define MSR_IA32_RTIT_ADDR3_B		0x00000587
-#define MSR_IA32_RTIT_CR3_MATCH		0x00000572
-#define MSR_IA32_RTIT_OUTPUT_BASE	0x00000560
-#define MSR_IA32_RTIT_OUTPUT_MASK	0x00000561
-
-#define MSR_MTRRfix64K_00000		0x00000250
-#define MSR_MTRRfix16K_80000		0x00000258
-#define MSR_MTRRfix16K_A0000		0x00000259
-#define MSR_MTRRfix4K_C0000		0x00000268
-#define MSR_MTRRfix4K_C8000		0x00000269
-#define MSR_MTRRfix4K_D0000		0x0000026a
-#define MSR_MTRRfix4K_D8000		0x0000026b
-#define MSR_MTRRfix4K_E0000		0x0000026c
-#define MSR_MTRRfix4K_E8000		0x0000026d
-#define MSR_MTRRfix4K_F0000		0x0000026e
-#define MSR_MTRRfix4K_F8000		0x0000026f
-#define MSR_MTRRdefType			0x000002ff
-
-#define MSR_IA32_CR_PAT			0x00000277
-
-#define MSR_IA32_DEBUGCTLMSR		0x000001d9
-#define MSR_IA32_LASTBRANCHFROMIP	0x000001db
-#define MSR_IA32_LASTBRANCHTOIP		0x000001dc
-#define MSR_IA32_LASTINTFROMIP		0x000001dd
-#define MSR_IA32_LASTINTTOIP		0x000001de
-
-/* DEBUGCTLMSR bits (others vary by model): */
-#define DEBUGCTLMSR_LBR			(1UL <<  0) /* last branch recording */
-#define DEBUGCTLMSR_BTF_SHIFT		1
-#define DEBUGCTLMSR_BTF			(1UL <<  1) /* single-step on branches */
-#define DEBUGCTLMSR_TR			(1UL <<  6)
-#define DEBUGCTLMSR_BTS			(1UL <<  7)
-#define DEBUGCTLMSR_BTINT		(1UL <<  8)
-#define DEBUGCTLMSR_BTS_OFF_OS		(1UL <<  9)
-#define DEBUGCTLMSR_BTS_OFF_USR		(1UL << 10)
-#define DEBUGCTLMSR_FREEZE_LBRS_ON_PMI	(1UL << 11)
-#define DEBUGCTLMSR_FREEZE_IN_SMM_BIT	14
-#define DEBUGCTLMSR_FREEZE_IN_SMM	(1UL << DEBUGCTLMSR_FREEZE_IN_SMM_BIT)
-
-#define MSR_PEBS_FRONTEND		0x000003f7
-
-#define MSR_IA32_POWER_CTL		0x000001fc
-
-#define MSR_IA32_MC0_CTL		0x00000400
-#define MSR_IA32_MC0_STATUS		0x00000401
-#define MSR_IA32_MC0_ADDR		0x00000402
-#define MSR_IA32_MC0_MISC		0x00000403
-
-/* C-state Residency Counters */
-#define MSR_PKG_C3_RESIDENCY		0x000003f8
-#define MSR_PKG_C6_RESIDENCY		0x000003f9
-#define MSR_ATOM_PKG_C6_RESIDENCY	0x000003fa
-#define MSR_PKG_C7_RESIDENCY		0x000003fa
-#define MSR_CORE_C3_RESIDENCY		0x000003fc
-#define MSR_CORE_C6_RESIDENCY		0x000003fd
-#define MSR_CORE_C7_RESIDENCY		0x000003fe
-#define MSR_KNL_CORE_C6_RESIDENCY	0x000003ff
-#define MSR_PKG_C2_RESIDENCY		0x0000060d
-#define MSR_PKG_C8_RESIDENCY		0x00000630
-#define MSR_PKG_C9_RESIDENCY		0x00000631
-#define MSR_PKG_C10_RESIDENCY		0x00000632
-
-/* Interrupt Response Limit */
-#define MSR_PKGC3_IRTL			0x0000060a
-#define MSR_PKGC6_IRTL			0x0000060b
-#define MSR_PKGC7_IRTL			0x0000060c
-#define MSR_PKGC8_IRTL			0x00000633
-#define MSR_PKGC9_IRTL			0x00000634
-#define MSR_PKGC10_IRTL			0x00000635
-
-/* Run Time Average Power Limiting (RAPL) Interface */
-
-#define MSR_RAPL_POWER_UNIT		0x00000606
-
-#define MSR_PKG_POWER_LIMIT		0x00000610
-#define MSR_PKG_ENERGY_STATUS		0x00000611
-#define MSR_PKG_PERF_STATUS		0x00000613
-#define MSR_PKG_POWER_INFO		0x00000614
-
-#define MSR_DRAM_POWER_LIMIT		0x00000618
-#define MSR_DRAM_ENERGY_STATUS		0x00000619
-#define MSR_DRAM_PERF_STATUS		0x0000061b
-#define MSR_DRAM_POWER_INFO		0x0000061c
-
-#define MSR_PP0_POWER_LIMIT		0x00000638
-#define MSR_PP0_ENERGY_STATUS		0x00000639
-#define MSR_PP0_POLICY			0x0000063a
-#define MSR_PP0_PERF_STATUS		0x0000063b
-
-#define MSR_PP1_POWER_LIMIT		0x00000640
-#define MSR_PP1_ENERGY_STATUS		0x00000641
-#define MSR_PP1_POLICY			0x00000642
-
-/* Config TDP MSRs */
-#define MSR_CONFIG_TDP_NOMINAL		0x00000648
-#define MSR_CONFIG_TDP_LEVEL_1		0x00000649
-#define MSR_CONFIG_TDP_LEVEL_2		0x0000064A
-#define MSR_CONFIG_TDP_CONTROL		0x0000064B
-#define MSR_TURBO_ACTIVATION_RATIO	0x0000064C
-
-#define MSR_PLATFORM_ENERGY_STATUS	0x0000064D
-
-#define MSR_PKG_WEIGHTED_CORE_C0_RES	0x00000658
-#define MSR_PKG_ANY_CORE_C0_RES		0x00000659
-#define MSR_PKG_ANY_GFXE_C0_RES		0x0000065A
-#define MSR_PKG_BOTH_CORE_GFXE_C0_RES	0x0000065B
-
-#define MSR_CORE_C1_RES			0x00000660
-#define MSR_MODULE_C6_RES_MS		0x00000664
-
-#define MSR_CC6_DEMOTION_POLICY_CONFIG	0x00000668
-#define MSR_MC6_DEMOTION_POLICY_CONFIG	0x00000669
-
-#define MSR_ATOM_CORE_RATIOS		0x0000066a
-#define MSR_ATOM_CORE_VIDS		0x0000066b
-#define MSR_ATOM_CORE_TURBO_RATIOS	0x0000066c
-#define MSR_ATOM_CORE_TURBO_VIDS	0x0000066d
-
-
-#define MSR_CORE_PERF_LIMIT_REASONS	0x00000690
-#define MSR_GFX_PERF_LIMIT_REASONS	0x000006B0
-#define MSR_RING_PERF_LIMIT_REASONS	0x000006B1
-
-/* Hardware P state interface */
-#define MSR_PPERF			0x0000064e
-#define MSR_PERF_LIMIT_REASONS		0x0000064f
-#define MSR_PM_ENABLE			0x00000770
-#define MSR_HWP_CAPABILITIES		0x00000771
-#define MSR_HWP_REQUEST_PKG		0x00000772
-#define MSR_HWP_INTERRUPT		0x00000773
-#define MSR_HWP_REQUEST			0x00000774
-#define MSR_HWP_STATUS			0x00000777
-
-/* CPUID.6.EAX */
-#define HWP_BASE_BIT			(1<<7)
-#define HWP_NOTIFICATIONS_BIT		(1<<8)
-#define HWP_ACTIVITY_WINDOW_BIT		(1<<9)
-#define HWP_ENERGY_PERF_PREFERENCE_BIT	(1<<10)
-#define HWP_PACKAGE_LEVEL_REQUEST_BIT	(1<<11)
-
-/* IA32_HWP_CAPABILITIES */
-#define HWP_HIGHEST_PERF(x)		(((x) >> 0) & 0xff)
-#define HWP_GUARANTEED_PERF(x)		(((x) >> 8) & 0xff)
-#define HWP_MOSTEFFICIENT_PERF(x)	(((x) >> 16) & 0xff)
-#define HWP_LOWEST_PERF(x)		(((x) >> 24) & 0xff)
-
-/* IA32_HWP_REQUEST */
-#define HWP_MIN_PERF(x)			(x & 0xff)
-#define HWP_MAX_PERF(x)			((x & 0xff) << 8)
-#define HWP_DESIRED_PERF(x)		((x & 0xff) << 16)
-#define HWP_ENERGY_PERF_PREFERENCE(x)	(((unsigned long long) x & 0xff) << 24)
-#define HWP_EPP_PERFORMANCE		0x00
-#define HWP_EPP_BALANCE_PERFORMANCE	0x80
-#define HWP_EPP_BALANCE_POWERSAVE	0xC0
-#define HWP_EPP_POWERSAVE		0xFF
-#define HWP_ACTIVITY_WINDOW(x)		((unsigned long long)(x & 0xff3) << 32)
-#define HWP_PACKAGE_CONTROL(x)		((unsigned long long)(x & 0x1) << 42)
-
-/* IA32_HWP_STATUS */
-#define HWP_GUARANTEED_CHANGE(x)	(x & 0x1)
-#define HWP_EXCURSION_TO_MINIMUM(x)	(x & 0x4)
-
-/* IA32_HWP_INTERRUPT */
-#define HWP_CHANGE_TO_GUARANTEED_INT(x)	(x & 0x1)
-#define HWP_EXCURSION_TO_MINIMUM_INT(x)	(x & 0x2)
-
-#define MSR_AMD64_MC0_MASK		0xc0010044
-
-#define MSR_IA32_MCx_CTL(x)		(MSR_IA32_MC0_CTL + 4*(x))
-#define MSR_IA32_MCx_STATUS(x)		(MSR_IA32_MC0_STATUS + 4*(x))
-#define MSR_IA32_MCx_ADDR(x)		(MSR_IA32_MC0_ADDR + 4*(x))
-#define MSR_IA32_MCx_MISC(x)		(MSR_IA32_MC0_MISC + 4*(x))
-
-#define MSR_AMD64_MCx_MASK(x)		(MSR_AMD64_MC0_MASK + (x))
-
-/* These are consecutive and not in the normal 4er MCE bank block */
-#define MSR_IA32_MC0_CTL2		0x00000280
-#define MSR_IA32_MCx_CTL2(x)		(MSR_IA32_MC0_CTL2 + (x))
-
-#define MSR_P6_PERFCTR0			0x000000c1
-#define MSR_P6_PERFCTR1			0x000000c2
-#define MSR_P6_EVNTSEL0			0x00000186
-#define MSR_P6_EVNTSEL1			0x00000187
-
-#define MSR_KNC_PERFCTR0               0x00000020
-#define MSR_KNC_PERFCTR1               0x00000021
-#define MSR_KNC_EVNTSEL0               0x00000028
-#define MSR_KNC_EVNTSEL1               0x00000029
-
-/* Alternative perfctr range with full access. */
-#define MSR_IA32_PMC0			0x000004c1
-
-/* AMD64 MSRs. Not complete. See the architecture manual for a more
-   complete list. */
-
-#define MSR_AMD64_PATCH_LEVEL		0x0000008b
-#define MSR_AMD64_TSC_RATIO		0xc0000104
-#define MSR_AMD64_NB_CFG		0xc001001f
-#define MSR_AMD64_PATCH_LOADER		0xc0010020
-#define MSR_AMD64_OSVW_ID_LENGTH	0xc0010140
-#define MSR_AMD64_OSVW_STATUS		0xc0010141
-#define MSR_AMD64_LS_CFG		0xc0011020
-#define MSR_AMD64_DC_CFG		0xc0011022
-#define MSR_AMD64_BU_CFG2		0xc001102a
-#define MSR_AMD64_IBSFETCHCTL		0xc0011030
-#define MSR_AMD64_IBSFETCHLINAD		0xc0011031
-#define MSR_AMD64_IBSFETCHPHYSAD	0xc0011032
-#define MSR_AMD64_IBSFETCH_REG_COUNT	3
-#define MSR_AMD64_IBSFETCH_REG_MASK	((1UL<<MSR_AMD64_IBSFETCH_REG_COUNT)-1)
-#define MSR_AMD64_IBSOPCTL		0xc0011033
-#define MSR_AMD64_IBSOPRIP		0xc0011034
-#define MSR_AMD64_IBSOPDATA		0xc0011035
-#define MSR_AMD64_IBSOPDATA2		0xc0011036
-#define MSR_AMD64_IBSOPDATA3		0xc0011037
-#define MSR_AMD64_IBSDCLINAD		0xc0011038
-#define MSR_AMD64_IBSDCPHYSAD		0xc0011039
-#define MSR_AMD64_IBSOP_REG_COUNT	7
-#define MSR_AMD64_IBSOP_REG_MASK	((1UL<<MSR_AMD64_IBSOP_REG_COUNT)-1)
-#define MSR_AMD64_IBSCTL		0xc001103a
-#define MSR_AMD64_IBSBRTARGET		0xc001103b
-#define MSR_AMD64_IBSOPDATA4		0xc001103d
-#define MSR_AMD64_IBS_REG_COUNT_MAX	8 /* includes MSR_AMD64_IBSBRTARGET */
-#define MSR_AMD64_SEV			0xc0010131
-#define MSR_AMD64_SEV_ENABLED_BIT	0
-#define MSR_AMD64_SEV_ENABLED		BIT_ULL(MSR_AMD64_SEV_ENABLED_BIT)
-
-/* Fam 17h MSRs */
-#define MSR_F17H_IRPERF			0xc00000e9
-
-/* Fam 16h MSRs */
-#define MSR_F16H_L2I_PERF_CTL		0xc0010230
-#define MSR_F16H_L2I_PERF_CTR		0xc0010231
-#define MSR_F16H_DR1_ADDR_MASK		0xc0011019
-#define MSR_F16H_DR2_ADDR_MASK		0xc001101a
-#define MSR_F16H_DR3_ADDR_MASK		0xc001101b
-#define MSR_F16H_DR0_ADDR_MASK		0xc0011027
-
-/* Fam 15h MSRs */
-#define MSR_F15H_PERF_CTL		0xc0010200
-#define MSR_F15H_PERF_CTR		0xc0010201
-#define MSR_F15H_NB_PERF_CTL		0xc0010240
-#define MSR_F15H_NB_PERF_CTR		0xc0010241
-#define MSR_F15H_PTSC			0xc0010280
-#define MSR_F15H_IC_CFG			0xc0011021
-
-/* Fam 10h MSRs */
-#define MSR_FAM10H_MMIO_CONF_BASE	0xc0010058
-#define FAM10H_MMIO_CONF_ENABLE		(1<<0)
-#define FAM10H_MMIO_CONF_BUSRANGE_MASK	0xf
-#define FAM10H_MMIO_CONF_BUSRANGE_SHIFT 2
-#define FAM10H_MMIO_CONF_BASE_MASK	0xfffffffULL
-#define FAM10H_MMIO_CONF_BASE_SHIFT	20
-#define MSR_FAM10H_NODE_ID		0xc001100c
-#define MSR_F10H_DECFG			0xc0011029
-#define MSR_F10H_DECFG_LFENCE_SERIALIZE_BIT	1
-#define MSR_F10H_DECFG_LFENCE_SERIALIZE		BIT_ULL(MSR_F10H_DECFG_LFENCE_SERIALIZE_BIT)
-
-/* K8 MSRs */
-#define MSR_K8_TOP_MEM1			0xc001001a
-#define MSR_K8_TOP_MEM2			0xc001001d
-#define MSR_K8_SYSCFG			0xc0010010
-#define MSR_K8_SYSCFG_MEM_ENCRYPT_BIT	23
-#define MSR_K8_SYSCFG_MEM_ENCRYPT	BIT_ULL(MSR_K8_SYSCFG_MEM_ENCRYPT_BIT)
-#define MSR_K8_INT_PENDING_MSG		0xc0010055
-/* C1E active bits in int pending message */
-#define K8_INTP_C1E_ACTIVE_MASK		0x18000000
-#define MSR_K8_TSEG_ADDR		0xc0010112
-#define MSR_K8_TSEG_MASK		0xc0010113
-#define K8_MTRRFIXRANGE_DRAM_ENABLE	0x00040000 /* MtrrFixDramEn bit    */
-#define K8_MTRRFIXRANGE_DRAM_MODIFY	0x00080000 /* MtrrFixDramModEn bit */
-#define K8_MTRR_RDMEM_WRMEM_MASK	0x18181818 /* Mask: RdMem|WrMem    */
-
-/* K7 MSRs */
-#define MSR_K7_EVNTSEL0			0xc0010000
-#define MSR_K7_PERFCTR0			0xc0010004
-#define MSR_K7_EVNTSEL1			0xc0010001
-#define MSR_K7_PERFCTR1			0xc0010005
-#define MSR_K7_EVNTSEL2			0xc0010002
-#define MSR_K7_PERFCTR2			0xc0010006
-#define MSR_K7_EVNTSEL3			0xc0010003
-#define MSR_K7_PERFCTR3			0xc0010007
-#define MSR_K7_CLK_CTL			0xc001001b
-#define MSR_K7_HWCR			0xc0010015
-#define MSR_K7_HWCR_SMMLOCK_BIT		0
-#define MSR_K7_HWCR_SMMLOCK		BIT_ULL(MSR_K7_HWCR_SMMLOCK_BIT)
-#define MSR_K7_FID_VID_CTL		0xc0010041
-#define MSR_K7_FID_VID_STATUS		0xc0010042
-
-/* K6 MSRs */
-#define MSR_K6_WHCR			0xc0000082
-#define MSR_K6_UWCCR			0xc0000085
-#define MSR_K6_EPMR			0xc0000086
-#define MSR_K6_PSOR			0xc0000087
-#define MSR_K6_PFIR			0xc0000088
-
-/* Centaur-Hauls/IDT defined MSRs. */
-#define MSR_IDT_FCR1			0x00000107
-#define MSR_IDT_FCR2			0x00000108
-#define MSR_IDT_FCR3			0x00000109
-#define MSR_IDT_FCR4			0x0000010a
-
-#define MSR_IDT_MCR0			0x00000110
-#define MSR_IDT_MCR1			0x00000111
-#define MSR_IDT_MCR2			0x00000112
-#define MSR_IDT_MCR3			0x00000113
-#define MSR_IDT_MCR4			0x00000114
-#define MSR_IDT_MCR5			0x00000115
-#define MSR_IDT_MCR6			0x00000116
-#define MSR_IDT_MCR7			0x00000117
-#define MSR_IDT_MCR_CTRL		0x00000120
-
-/* VIA Cyrix defined MSRs*/
-#define MSR_VIA_FCR			0x00001107
-#define MSR_VIA_LONGHAUL		0x0000110a
-#define MSR_VIA_RNG			0x0000110b
-#define MSR_VIA_BCR2			0x00001147
-
-/* Transmeta defined MSRs */
-#define MSR_TMTA_LONGRUN_CTRL		0x80868010
-#define MSR_TMTA_LONGRUN_FLAGS		0x80868011
-#define MSR_TMTA_LRTI_READOUT		0x80868018
-#define MSR_TMTA_LRTI_VOLT_MHZ		0x8086801a
-
-/* Intel defined MSRs. */
-#define MSR_IA32_P5_MC_ADDR		0x00000000
-#define MSR_IA32_P5_MC_TYPE		0x00000001
-#define MSR_IA32_TSC			0x00000010
-#define MSR_IA32_PLATFORM_ID		0x00000017
-#define MSR_IA32_EBL_CR_POWERON		0x0000002a
-#define MSR_EBC_FREQUENCY_ID		0x0000002c
-#define MSR_SMI_COUNT			0x00000034
-#define MSR_IA32_FEATURE_CONTROL        0x0000003a
-#define MSR_IA32_TSC_ADJUST             0x0000003b
-#define MSR_IA32_BNDCFGS		0x00000d90
-
-#define MSR_IA32_BNDCFGS_RSVD		0x00000ffc
-
-#define MSR_IA32_XSS			0x00000da0
-
-#define FEATURE_CONTROL_LOCKED				(1<<0)
-#define FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX	(1<<1)
-#define FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX	(1<<2)
-#define FEATURE_CONTROL_LMCE				(1<<20)
-
-#define MSR_IA32_APICBASE		0x0000001b
-#define MSR_IA32_APICBASE_BSP		(1<<8)
-#define MSR_IA32_APICBASE_ENABLE	(1<<11)
-#define MSR_IA32_APICBASE_BASE		(0xfffff<<12)
-
 #define APIC_BASE_MSR	0x800
 #define X2APIC_ENABLE	(1UL << 10)
 #define	APIC_ICR	0x300
@@ -813,291 +377,7 @@ void kvm_get_cpu_address_width(unsigned int *pa_bits, unsigned int *va_bits);
 #define		APIC_VECTOR_MASK	0x000FF
 #define	APIC_ICR2	0x310
 
-#define MSR_IA32_TSCDEADLINE		0x000006e0
-
-#define MSR_IA32_UCODE_WRITE		0x00000079
-#define MSR_IA32_UCODE_REV		0x0000008b
-
-#define MSR_IA32_SMM_MONITOR_CTL	0x0000009b
-#define MSR_IA32_SMBASE			0x0000009e
-
-#define MSR_IA32_PERF_STATUS		0x00000198
-#define MSR_IA32_PERF_CTL		0x00000199
-#define INTEL_PERF_CTL_MASK		0xffff
-#define MSR_AMD_PSTATE_DEF_BASE		0xc0010064
-#define MSR_AMD_PERF_STATUS		0xc0010063
-#define MSR_AMD_PERF_CTL		0xc0010062
-
-#define MSR_IA32_MPERF			0x000000e7
-#define MSR_IA32_APERF			0x000000e8
-
-#define MSR_IA32_THERM_CONTROL		0x0000019a
-#define MSR_IA32_THERM_INTERRUPT	0x0000019b
-
-#define THERM_INT_HIGH_ENABLE		(1 << 0)
-#define THERM_INT_LOW_ENABLE		(1 << 1)
-#define THERM_INT_PLN_ENABLE		(1 << 24)
-
-#define MSR_IA32_THERM_STATUS		0x0000019c
-
-#define THERM_STATUS_PROCHOT		(1 << 0)
-#define THERM_STATUS_POWER_LIMIT	(1 << 10)
-
-#define MSR_THERM2_CTL			0x0000019d
-
-#define MSR_THERM2_CTL_TM_SELECT	(1ULL << 16)
-
-#define MSR_IA32_MISC_ENABLE		0x000001a0
-
-#define MSR_IA32_TEMPERATURE_TARGET	0x000001a2
-
-#define MSR_MISC_FEATURE_CONTROL	0x000001a4
-#define MSR_MISC_PWR_MGMT		0x000001aa
-
-#define MSR_IA32_ENERGY_PERF_BIAS	0x000001b0
-#define ENERGY_PERF_BIAS_PERFORMANCE		0
-#define ENERGY_PERF_BIAS_BALANCE_PERFORMANCE	4
-#define ENERGY_PERF_BIAS_NORMAL			6
-#define ENERGY_PERF_BIAS_BALANCE_POWERSAVE	8
-#define ENERGY_PERF_BIAS_POWERSAVE		15
-
-#define MSR_IA32_PACKAGE_THERM_STATUS		0x000001b1
-
-#define PACKAGE_THERM_STATUS_PROCHOT		(1 << 0)
-#define PACKAGE_THERM_STATUS_POWER_LIMIT	(1 << 10)
-
-#define MSR_IA32_PACKAGE_THERM_INTERRUPT	0x000001b2
-
-#define PACKAGE_THERM_INT_HIGH_ENABLE		(1 << 0)
-#define PACKAGE_THERM_INT_LOW_ENABLE		(1 << 1)
-#define PACKAGE_THERM_INT_PLN_ENABLE		(1 << 24)
-
-/* Thermal Thresholds Support */
-#define THERM_INT_THRESHOLD0_ENABLE    (1 << 15)
-#define THERM_SHIFT_THRESHOLD0        8
-#define THERM_MASK_THRESHOLD0          (0x7f << THERM_SHIFT_THRESHOLD0)
-#define THERM_INT_THRESHOLD1_ENABLE    (1 << 23)
-#define THERM_SHIFT_THRESHOLD1        16
-#define THERM_MASK_THRESHOLD1          (0x7f << THERM_SHIFT_THRESHOLD1)
-#define THERM_STATUS_THRESHOLD0        (1 << 6)
-#define THERM_LOG_THRESHOLD0           (1 << 7)
-#define THERM_STATUS_THRESHOLD1        (1 << 8)
-#define THERM_LOG_THRESHOLD1           (1 << 9)
-
-/* MISC_ENABLE bits: architectural */
-#define MSR_IA32_MISC_ENABLE_FAST_STRING_BIT		0
-#define MSR_IA32_MISC_ENABLE_FAST_STRING		(1ULL << MSR_IA32_MISC_ENABLE_FAST_STRING_BIT)
-#define MSR_IA32_MISC_ENABLE_TCC_BIT			1
-#define MSR_IA32_MISC_ENABLE_TCC			(1ULL << MSR_IA32_MISC_ENABLE_TCC_BIT)
-#define MSR_IA32_MISC_ENABLE_EMON_BIT			7
-#define MSR_IA32_MISC_ENABLE_EMON			(1ULL << MSR_IA32_MISC_ENABLE_EMON_BIT)
-#define MSR_IA32_MISC_ENABLE_BTS_UNAVAIL_BIT		11
-#define MSR_IA32_MISC_ENABLE_BTS_UNAVAIL		(1ULL << MSR_IA32_MISC_ENABLE_BTS_UNAVAIL_BIT)
-#define MSR_IA32_MISC_ENABLE_PEBS_UNAVAIL_BIT		12
-#define MSR_IA32_MISC_ENABLE_PEBS_UNAVAIL		(1ULL << MSR_IA32_MISC_ENABLE_PEBS_UNAVAIL_BIT)
-#define MSR_IA32_MISC_ENABLE_ENHANCED_SPEEDSTEP_BIT	16
-#define MSR_IA32_MISC_ENABLE_ENHANCED_SPEEDSTEP		(1ULL << MSR_IA32_MISC_ENABLE_ENHANCED_SPEEDSTEP_BIT)
-#define MSR_IA32_MISC_ENABLE_MWAIT_BIT			18
-#define MSR_IA32_MISC_ENABLE_MWAIT			(1ULL << MSR_IA32_MISC_ENABLE_MWAIT_BIT)
-#define MSR_IA32_MISC_ENABLE_LIMIT_CPUID_BIT		22
-#define MSR_IA32_MISC_ENABLE_LIMIT_CPUID		(1ULL << MSR_IA32_MISC_ENABLE_LIMIT_CPUID_BIT)
-#define MSR_IA32_MISC_ENABLE_XTPR_DISABLE_BIT		23
-#define MSR_IA32_MISC_ENABLE_XTPR_DISABLE		(1ULL << MSR_IA32_MISC_ENABLE_XTPR_DISABLE_BIT)
-#define MSR_IA32_MISC_ENABLE_XD_DISABLE_BIT		34
-#define MSR_IA32_MISC_ENABLE_XD_DISABLE			(1ULL << MSR_IA32_MISC_ENABLE_XD_DISABLE_BIT)
-
-/* MISC_ENABLE bits: model-specific, meaning may vary from core to core */
-#define MSR_IA32_MISC_ENABLE_X87_COMPAT_BIT		2
-#define MSR_IA32_MISC_ENABLE_X87_COMPAT			(1ULL << MSR_IA32_MISC_ENABLE_X87_COMPAT_BIT)
-#define MSR_IA32_MISC_ENABLE_TM1_BIT			3
-#define MSR_IA32_MISC_ENABLE_TM1			(1ULL << MSR_IA32_MISC_ENABLE_TM1_BIT)
-#define MSR_IA32_MISC_ENABLE_SPLIT_LOCK_DISABLE_BIT	4
-#define MSR_IA32_MISC_ENABLE_SPLIT_LOCK_DISABLE		(1ULL << MSR_IA32_MISC_ENABLE_SPLIT_LOCK_DISABLE_BIT)
-#define MSR_IA32_MISC_ENABLE_L3CACHE_DISABLE_BIT	6
-#define MSR_IA32_MISC_ENABLE_L3CACHE_DISABLE		(1ULL << MSR_IA32_MISC_ENABLE_L3CACHE_DISABLE_BIT)
-#define MSR_IA32_MISC_ENABLE_SUPPRESS_LOCK_BIT		8
-#define MSR_IA32_MISC_ENABLE_SUPPRESS_LOCK		(1ULL << MSR_IA32_MISC_ENABLE_SUPPRESS_LOCK_BIT)
-#define MSR_IA32_MISC_ENABLE_PREFETCH_DISABLE_BIT	9
-#define MSR_IA32_MISC_ENABLE_PREFETCH_DISABLE		(1ULL << MSR_IA32_MISC_ENABLE_PREFETCH_DISABLE_BIT)
-#define MSR_IA32_MISC_ENABLE_FERR_BIT			10
-#define MSR_IA32_MISC_ENABLE_FERR			(1ULL << MSR_IA32_MISC_ENABLE_FERR_BIT)
-#define MSR_IA32_MISC_ENABLE_FERR_MULTIPLEX_BIT		10
-#define MSR_IA32_MISC_ENABLE_FERR_MULTIPLEX		(1ULL << MSR_IA32_MISC_ENABLE_FERR_MULTIPLEX_BIT)
-#define MSR_IA32_MISC_ENABLE_TM2_BIT			13
-#define MSR_IA32_MISC_ENABLE_TM2			(1ULL << MSR_IA32_MISC_ENABLE_TM2_BIT)
-#define MSR_IA32_MISC_ENABLE_ADJ_PREF_DISABLE_BIT	19
-#define MSR_IA32_MISC_ENABLE_ADJ_PREF_DISABLE		(1ULL << MSR_IA32_MISC_ENABLE_ADJ_PREF_DISABLE_BIT)
-#define MSR_IA32_MISC_ENABLE_SPEEDSTEP_LOCK_BIT		20
-#define MSR_IA32_MISC_ENABLE_SPEEDSTEP_LOCK		(1ULL << MSR_IA32_MISC_ENABLE_SPEEDSTEP_LOCK_BIT)
-#define MSR_IA32_MISC_ENABLE_L1D_CONTEXT_BIT		24
-#define MSR_IA32_MISC_ENABLE_L1D_CONTEXT		(1ULL << MSR_IA32_MISC_ENABLE_L1D_CONTEXT_BIT)
-#define MSR_IA32_MISC_ENABLE_DCU_PREF_DISABLE_BIT	37
-#define MSR_IA32_MISC_ENABLE_DCU_PREF_DISABLE		(1ULL << MSR_IA32_MISC_ENABLE_DCU_PREF_DISABLE_BIT)
-#define MSR_IA32_MISC_ENABLE_TURBO_DISABLE_BIT		38
-#define MSR_IA32_MISC_ENABLE_TURBO_DISABLE		(1ULL << MSR_IA32_MISC_ENABLE_TURBO_DISABLE_BIT)
-#define MSR_IA32_MISC_ENABLE_IP_PREF_DISABLE_BIT	39
-#define MSR_IA32_MISC_ENABLE_IP_PREF_DISABLE		(1ULL << MSR_IA32_MISC_ENABLE_IP_PREF_DISABLE_BIT)
-
-/* MISC_FEATURES_ENABLES non-architectural features */
-#define MSR_MISC_FEATURES_ENABLES	0x00000140
-
-#define MSR_MISC_FEATURES_ENABLES_CPUID_FAULT_BIT	0
-#define MSR_MISC_FEATURES_ENABLES_CPUID_FAULT		BIT_ULL(MSR_MISC_FEATURES_ENABLES_CPUID_FAULT_BIT)
-#define MSR_MISC_FEATURES_ENABLES_RING3MWAIT_BIT	1
-
-#define MSR_IA32_TSC_DEADLINE		0x000006E0
-
-/* P4/Xeon+ specific */
-#define MSR_IA32_MCG_EAX		0x00000180
-#define MSR_IA32_MCG_EBX		0x00000181
-#define MSR_IA32_MCG_ECX		0x00000182
-#define MSR_IA32_MCG_EDX		0x00000183
-#define MSR_IA32_MCG_ESI		0x00000184
-#define MSR_IA32_MCG_EDI		0x00000185
-#define MSR_IA32_MCG_EBP		0x00000186
-#define MSR_IA32_MCG_ESP		0x00000187
-#define MSR_IA32_MCG_EFLAGS		0x00000188
-#define MSR_IA32_MCG_EIP		0x00000189
-#define MSR_IA32_MCG_RESERVED		0x0000018a
-
-/* Pentium IV performance counter MSRs */
-#define MSR_P4_BPU_PERFCTR0		0x00000300
-#define MSR_P4_BPU_PERFCTR1		0x00000301
-#define MSR_P4_BPU_PERFCTR2		0x00000302
-#define MSR_P4_BPU_PERFCTR3		0x00000303
-#define MSR_P4_MS_PERFCTR0		0x00000304
-#define MSR_P4_MS_PERFCTR1		0x00000305
-#define MSR_P4_MS_PERFCTR2		0x00000306
-#define MSR_P4_MS_PERFCTR3		0x00000307
-#define MSR_P4_FLAME_PERFCTR0		0x00000308
-#define MSR_P4_FLAME_PERFCTR1		0x00000309
-#define MSR_P4_FLAME_PERFCTR2		0x0000030a
-#define MSR_P4_FLAME_PERFCTR3		0x0000030b
-#define MSR_P4_IQ_PERFCTR0		0x0000030c
-#define MSR_P4_IQ_PERFCTR1		0x0000030d
-#define MSR_P4_IQ_PERFCTR2		0x0000030e
-#define MSR_P4_IQ_PERFCTR3		0x0000030f
-#define MSR_P4_IQ_PERFCTR4		0x00000310
-#define MSR_P4_IQ_PERFCTR5		0x00000311
-#define MSR_P4_BPU_CCCR0		0x00000360
-#define MSR_P4_BPU_CCCR1		0x00000361
-#define MSR_P4_BPU_CCCR2		0x00000362
-#define MSR_P4_BPU_CCCR3		0x00000363
-#define MSR_P4_MS_CCCR0			0x00000364
-#define MSR_P4_MS_CCCR1			0x00000365
-#define MSR_P4_MS_CCCR2			0x00000366
-#define MSR_P4_MS_CCCR3			0x00000367
-#define MSR_P4_FLAME_CCCR0		0x00000368
-#define MSR_P4_FLAME_CCCR1		0x00000369
-#define MSR_P4_FLAME_CCCR2		0x0000036a
-#define MSR_P4_FLAME_CCCR3		0x0000036b
-#define MSR_P4_IQ_CCCR0			0x0000036c
-#define MSR_P4_IQ_CCCR1			0x0000036d
-#define MSR_P4_IQ_CCCR2			0x0000036e
-#define MSR_P4_IQ_CCCR3			0x0000036f
-#define MSR_P4_IQ_CCCR4			0x00000370
-#define MSR_P4_IQ_CCCR5			0x00000371
-#define MSR_P4_ALF_ESCR0		0x000003ca
-#define MSR_P4_ALF_ESCR1		0x000003cb
-#define MSR_P4_BPU_ESCR0		0x000003b2
-#define MSR_P4_BPU_ESCR1		0x000003b3
-#define MSR_P4_BSU_ESCR0		0x000003a0
-#define MSR_P4_BSU_ESCR1		0x000003a1
-#define MSR_P4_CRU_ESCR0		0x000003b8
-#define MSR_P4_CRU_ESCR1		0x000003b9
-#define MSR_P4_CRU_ESCR2		0x000003cc
-#define MSR_P4_CRU_ESCR3		0x000003cd
-#define MSR_P4_CRU_ESCR4		0x000003e0
-#define MSR_P4_CRU_ESCR5		0x000003e1
-#define MSR_P4_DAC_ESCR0		0x000003a8
-#define MSR_P4_DAC_ESCR1		0x000003a9
-#define MSR_P4_FIRM_ESCR0		0x000003a4
-#define MSR_P4_FIRM_ESCR1		0x000003a5
-#define MSR_P4_FLAME_ESCR0		0x000003a6
-#define MSR_P4_FLAME_ESCR1		0x000003a7
-#define MSR_P4_FSB_ESCR0		0x000003a2
-#define MSR_P4_FSB_ESCR1		0x000003a3
-#define MSR_P4_IQ_ESCR0			0x000003ba
-#define MSR_P4_IQ_ESCR1			0x000003bb
-#define MSR_P4_IS_ESCR0			0x000003b4
-#define MSR_P4_IS_ESCR1			0x000003b5
-#define MSR_P4_ITLB_ESCR0		0x000003b6
-#define MSR_P4_ITLB_ESCR1		0x000003b7
-#define MSR_P4_IX_ESCR0			0x000003c8
-#define MSR_P4_IX_ESCR1			0x000003c9
-#define MSR_P4_MOB_ESCR0		0x000003aa
-#define MSR_P4_MOB_ESCR1		0x000003ab
-#define MSR_P4_MS_ESCR0			0x000003c0
-#define MSR_P4_MS_ESCR1			0x000003c1
-#define MSR_P4_PMH_ESCR0		0x000003ac
-#define MSR_P4_PMH_ESCR1		0x000003ad
-#define MSR_P4_RAT_ESCR0		0x000003bc
-#define MSR_P4_RAT_ESCR1		0x000003bd
-#define MSR_P4_SAAT_ESCR0		0x000003ae
-#define MSR_P4_SAAT_ESCR1		0x000003af
-#define MSR_P4_SSU_ESCR0		0x000003be
-#define MSR_P4_SSU_ESCR1		0x000003bf /* guess: not in manual */
-
-#define MSR_P4_TBPU_ESCR0		0x000003c2
-#define MSR_P4_TBPU_ESCR1		0x000003c3
-#define MSR_P4_TC_ESCR0			0x000003c4
-#define MSR_P4_TC_ESCR1			0x000003c5
-#define MSR_P4_U2L_ESCR0		0x000003b0
-#define MSR_P4_U2L_ESCR1		0x000003b1
-
-#define MSR_P4_PEBS_MATRIX_VERT		0x000003f2
-
-/* Intel Core-based CPU performance counters */
-#define MSR_CORE_PERF_FIXED_CTR0	0x00000309
-#define MSR_CORE_PERF_FIXED_CTR1	0x0000030a
-#define MSR_CORE_PERF_FIXED_CTR2	0x0000030b
-#define MSR_CORE_PERF_FIXED_CTR_CTRL	0x0000038d
-#define MSR_CORE_PERF_GLOBAL_STATUS	0x0000038e
-#define MSR_CORE_PERF_GLOBAL_CTRL	0x0000038f
-#define MSR_CORE_PERF_GLOBAL_OVF_CTRL	0x00000390
-
-/* Geode defined MSRs */
-#define MSR_GEODE_BUSCONT_CONF0		0x00001900
-
-/* Intel VT MSRs */
-#define MSR_IA32_VMX_BASIC              0x00000480
-#define MSR_IA32_VMX_PINBASED_CTLS      0x00000481
-#define MSR_IA32_VMX_PROCBASED_CTLS     0x00000482
-#define MSR_IA32_VMX_EXIT_CTLS          0x00000483
-#define MSR_IA32_VMX_ENTRY_CTLS         0x00000484
-#define MSR_IA32_VMX_MISC               0x00000485
-#define MSR_IA32_VMX_CR0_FIXED0         0x00000486
-#define MSR_IA32_VMX_CR0_FIXED1         0x00000487
-#define MSR_IA32_VMX_CR4_FIXED0         0x00000488
-#define MSR_IA32_VMX_CR4_FIXED1         0x00000489
-#define MSR_IA32_VMX_VMCS_ENUM          0x0000048a
-#define MSR_IA32_VMX_PROCBASED_CTLS2    0x0000048b
-#define MSR_IA32_VMX_EPT_VPID_CAP       0x0000048c
-#define MSR_IA32_VMX_TRUE_PINBASED_CTLS  0x0000048d
-#define MSR_IA32_VMX_TRUE_PROCBASED_CTLS 0x0000048e
-#define MSR_IA32_VMX_TRUE_EXIT_CTLS      0x0000048f
-#define MSR_IA32_VMX_TRUE_ENTRY_CTLS     0x00000490
-#define MSR_IA32_VMX_VMFUNC             0x00000491
-
-/* VMX_BASIC bits and bitmasks */
-#define VMX_BASIC_VMCS_SIZE_SHIFT	32
-#define VMX_BASIC_TRUE_CTLS		(1ULL << 55)
-#define VMX_BASIC_64		0x0001000000000000LLU
-#define VMX_BASIC_MEM_TYPE_SHIFT	50
-#define VMX_BASIC_MEM_TYPE_MASK	0x003c000000000000LLU
-#define VMX_BASIC_MEM_TYPE_WB	6LLU
-#define VMX_BASIC_INOUT		0x0040000000000000LLU
-
 /* VMX_EPT_VPID_CAP bits */
-#define VMX_EPT_VPID_CAP_AD_BITS	(1ULL << 21)
-
-/* MSR_IA32_VMX_MISC bits */
-#define MSR_IA32_VMX_MISC_VMWRITE_SHADOW_RO_FIELDS (1ULL << 29)
-#define MSR_IA32_VMX_MISC_PREEMPTION_TIMER_SCALE   0x1F
-/* AMD-V MSRs */
-
-#define MSR_VM_CR                       0xc0010114
-#define MSR_VM_IGNNE                    0xc0010115
-#define MSR_VM_HSAVE_PA                 0xc0010117
+#define VMX_EPT_VPID_CAP_AD_BITS       (1ULL << 21)
 
 #endif /* SELFTEST_KVM_PROCESSOR_H */
-- 
2.24.0


^ permalink raw reply	[flat|nested] 23+ messages in thread

* [PATCH v4 03/19] tools arch x86: Sync msr-index.h from kernel sources
  2019-11-28  1:39 [PATCH v4 00/19] x86/cpu: Clean up handling of VMX features Sean Christopherson
  2019-11-28  1:39 ` [PATCH v4 01/19] x86/msr-index: Clean up bit defines for IA32_FEATURE_CONTROL MSR Sean Christopherson
  2019-11-28  1:39 ` [PATCH v4 02/19] selftests: kvm: Replace manual MSR defs with common msr-index.h Sean Christopherson
@ 2019-11-28  1:40 ` Sean Christopherson
  2019-11-28  1:40 ` [PATCH v4 04/19] x86/intel: Initialize IA32_FEAT_CTL MSR at boot Sean Christopherson
                   ` (15 subsequent siblings)
  18 siblings, 0 replies; 23+ messages in thread
From: Sean Christopherson @ 2019-11-28  1:40 UTC (permalink / raw)
  To: Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86
  Cc: H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan,
	linux-kernel, kvm, linux-edac, linux-pm, linux-kselftest,
	Borislav Petkov, Jarkko Sakkinen

Sync msr-index.h to pull in recent renames of the IA32_FEATURE_CONTROL
MSR definitions.  Update KVM's VMX selftest and turbostat accordingly.
Keep the full name in turbostat's output to avoid breaking someone's
workflow, e.g. if a script is looking for the full name.

While using the renamed defines is by no means necessary, do the sync
now to avoid leaving a landmine that will get stepped on the next time
msr-index.h needs to be refreshed for some other reason.

No functional change intended.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 tools/arch/x86/include/asm/msr-index.h       | 30 ++++++++++++++++----
 tools/power/x86/turbostat/turbostat.c        |  4 +--
 tools/testing/selftests/kvm/lib/x86_64/vmx.c |  8 +++---
 3 files changed, 30 insertions(+), 12 deletions(-)

diff --git a/tools/arch/x86/include/asm/msr-index.h b/tools/arch/x86/include/asm/msr-index.h
index 20ce682a2540..0fc370bc7db5 100644
--- a/tools/arch/x86/include/asm/msr-index.h
+++ b/tools/arch/x86/include/asm/msr-index.h
@@ -93,6 +93,18 @@
 						  * Microarchitectural Data
 						  * Sampling (MDS) vulnerabilities.
 						  */
+#define ARCH_CAP_PSCHANGE_MC_NO		BIT(6)	 /*
+						  * The processor is not susceptible to a
+						  * machine check error due to modifying the
+						  * code page size along with either the
+						  * physical address or cache type
+						  * without TLB invalidation.
+						  */
+#define ARCH_CAP_TSX_CTRL_MSR		BIT(7)	/* MSR for TSX control is available. */
+#define ARCH_CAP_TAA_NO			BIT(8)	/*
+						 * Not susceptible to
+						 * TSX Async Abort (TAA) vulnerabilities.
+						 */
 
 #define MSR_IA32_FLUSH_CMD		0x0000010b
 #define L1D_FLUSH			BIT(0)	/*
@@ -103,6 +115,10 @@
 #define MSR_IA32_BBL_CR_CTL		0x00000119
 #define MSR_IA32_BBL_CR_CTL3		0x0000011e
 
+#define MSR_IA32_TSX_CTRL		0x00000122
+#define TSX_CTRL_RTM_DISABLE		BIT(0)	/* Disable RTM feature */
+#define TSX_CTRL_CPUID_CLEAR		BIT(1)	/* Disable TSX enumeration */
+
 #define MSR_IA32_SYSENTER_CS		0x00000174
 #define MSR_IA32_SYSENTER_ESP		0x00000175
 #define MSR_IA32_SYSENTER_EIP		0x00000176
@@ -540,7 +556,14 @@
 #define MSR_IA32_EBL_CR_POWERON		0x0000002a
 #define MSR_EBC_FREQUENCY_ID		0x0000002c
 #define MSR_SMI_COUNT			0x00000034
-#define MSR_IA32_FEATURE_CONTROL        0x0000003a
+
+/* Referred to as IA32_FEATURE_CONTROL in Intel's SDM. */
+#define MSR_IA32_FEAT_CTL		0x0000003a
+#define FEAT_CTL_LOCKED				BIT(0)
+#define FEAT_CTL_VMX_ENABLED_INSIDE_SMX		BIT(1)
+#define FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX	BIT(2)
+#define FEAT_CTL_LMCE_ENABLED			BIT(20)
+
 #define MSR_IA32_TSC_ADJUST             0x0000003b
 #define MSR_IA32_BNDCFGS		0x00000d90
 
@@ -548,11 +571,6 @@
 
 #define MSR_IA32_XSS			0x00000da0
 
-#define FEATURE_CONTROL_LOCKED				(1<<0)
-#define FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX	(1<<1)
-#define FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX	(1<<2)
-#define FEATURE_CONTROL_LMCE				(1<<20)
-
 #define MSR_IA32_APICBASE		0x0000001b
 #define MSR_IA32_APICBASE_BSP		(1<<8)
 #define MSR_IA32_APICBASE_ENABLE	(1<<11)
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 5d0fddda842c..31c1ca0bb3ee 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -4499,10 +4499,10 @@ void decode_feature_control_msr(void)
 {
 	unsigned long long msr;
 
-	if (!get_msr(base_cpu, MSR_IA32_FEATURE_CONTROL, &msr))
+	if (!get_msr(base_cpu, MSR_IA32_FEAT_CTL, &msr))
 		fprintf(outf, "cpu%d: MSR_IA32_FEATURE_CONTROL: 0x%08llx (%sLocked %s)\n",
 			base_cpu, msr,
-			msr & FEATURE_CONTROL_LOCKED ? "" : "UN-",
+			msr & FEAT_CTL_LOCKED ? "" : "UN-",
 			msr & (1 << 18) ? "SGX" : "");
 }
 
diff --git a/tools/testing/selftests/kvm/lib/x86_64/vmx.c b/tools/testing/selftests/kvm/lib/x86_64/vmx.c
index f6ec97b7eaef..85064baf5e97 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/vmx.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/vmx.c
@@ -157,11 +157,11 @@ bool prepare_for_vmx_operation(struct vmx_pages *vmx)
 	 *  Bit 2: Enables VMXON outside of SMX operation. If clear, VMXON
 	 *    outside of SMX causes a #GP.
 	 */
-	required = FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX;
-	required |= FEATURE_CONTROL_LOCKED;
-	feature_control = rdmsr(MSR_IA32_FEATURE_CONTROL);
+	required = FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX;
+	required |= FEAT_CTL_LOCKED;
+	feature_control = rdmsr(MSR_IA32_FEAT_CTL);
 	if ((feature_control & required) != required)
-		wrmsr(MSR_IA32_FEATURE_CONTROL, feature_control | required);
+		wrmsr(MSR_IA32_FEAT_CTL, feature_control | required);
 
 	/* Enter VMX root operation. */
 	*(uint32_t *)(vmx->vmxon) = vmcs_revision();
-- 
2.24.0


^ permalink raw reply	[flat|nested] 23+ messages in thread

* [PATCH v4 04/19] x86/intel: Initialize IA32_FEAT_CTL MSR at boot
  2019-11-28  1:39 [PATCH v4 00/19] x86/cpu: Clean up handling of VMX features Sean Christopherson
                   ` (2 preceding siblings ...)
  2019-11-28  1:40 ` [PATCH v4 03/19] tools arch x86: Sync msr-index.h from kernel sources Sean Christopherson
@ 2019-11-28  1:40 ` Sean Christopherson
  2019-11-28  1:40 ` [PATCH v4 05/19] x86/mce: WARN once if IA32_FEAT_CTL MSR is left unlocked Sean Christopherson
                   ` (14 subsequent siblings)
  18 siblings, 0 replies; 23+ messages in thread
From: Sean Christopherson @ 2019-11-28  1:40 UTC (permalink / raw)
  To: Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86
  Cc: H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan,
	linux-kernel, kvm, linux-edac, linux-pm, linux-kselftest,
	Borislav Petkov, Jarkko Sakkinen

Opportunistically initialize IA32_FEAT_CTL to enable VMX when the MSR is
left unlocked by BIOS.  Configuring feature control at boot time paves
the way for similar enabling of other features, e.g. Software Guard
Extensions (SGX).

Temporarily leave equivalent KVM code in place in order to avoid
introducing a regression on Centaur and Zhaoxin CPUs, e.g. removing
KVM's code would leave the MSR unlocked on those CPUs and would break
existing functionality if people are loading kvm_intel on Centaur and/or
Zhaoxin.  Defer enablement of the boot-time configuration on Centaur and
Zhaoxin to future patches to aid bisection.

Note, Local Machine Check Exceptions (LMCE) are also supported by the
kernel and enabled via feature control, but the kernel currently uses
LMCE if and and only if the feature is explicitly enabled by BIOS.  Keep
the current behavior to avoid introducing bugs, future patches can opt
in to opportunistic enabling if it's deemed desirable to do so.

Always lock IA32_FEAT_CTL if it exists, even if the CPU doesn't support
VMX, so that other existing and future kernel code that queries the MSR
can assume it's locked.

Start from a clean slate when constructing the value to write to
IA32_FEAT_CTL, i.e. ignore whatever value BIOS left in the MSR so as not
to enable random features or fault on the WRMSR.

Suggested-by: Borislav Petkov <bp@suse.de>
Cc: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/Kconfig.cpu           |  4 ++++
 arch/x86/kernel/cpu/Makefile   |  1 +
 arch/x86/kernel/cpu/cpu.h      |  4 ++++
 arch/x86/kernel/cpu/feat_ctl.c | 37 ++++++++++++++++++++++++++++++++++
 arch/x86/kernel/cpu/intel.c    |  2 ++
 5 files changed, 48 insertions(+)
 create mode 100644 arch/x86/kernel/cpu/feat_ctl.c

diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index af9c967782f6..98be76fa2978 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -387,6 +387,10 @@ config X86_DEBUGCTLMSR
 	def_bool y
 	depends on !(MK6 || MWINCHIPC6 || MWINCHIP3D || MCYRIXIII || M586MMX || M586TSC || M586 || M486SX || M486) && !UML
 
+config IA32_FEAT_CTL
+	def_bool y
+	depends on CPU_SUP_INTEL
+
 menuconfig PROCESSOR_SELECT
 	bool "Supported processor vendors" if EXPERT
 	---help---
diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile
index a704fb9ee98e..4173b0de7a2f 100644
--- a/arch/x86/kernel/cpu/Makefile
+++ b/arch/x86/kernel/cpu/Makefile
@@ -32,6 +32,7 @@ obj-y			+= umwait.o
 obj-$(CONFIG_PROC_FS)	+= proc.o
 obj-$(CONFIG_X86_FEATURE_NAMES) += capflags.o powerflags.o
 
+obj-$(CONFIG_IA32_FEAT_CTL) += feat_ctl.o
 ifdef CONFIG_CPU_SUP_INTEL
 obj-y			+= intel.o intel_pconfig.o tsx.o
 obj-$(CONFIG_PM)	+= intel_epb.o
diff --git a/arch/x86/kernel/cpu/cpu.h b/arch/x86/kernel/cpu/cpu.h
index 38ab6e115eac..37fdefd14f28 100644
--- a/arch/x86/kernel/cpu/cpu.h
+++ b/arch/x86/kernel/cpu/cpu.h
@@ -80,4 +80,8 @@ extern void x86_spec_ctrl_setup_ap(void);
 
 extern u64 x86_read_arch_cap_msr(void);
 
+#ifdef CONFIG_IA32_FEAT_CTL
+void init_ia32_feat_ctl(struct cpuinfo_x86 *c);
+#endif
+
 #endif /* ARCH_X86_CPU_H */
diff --git a/arch/x86/kernel/cpu/feat_ctl.c b/arch/x86/kernel/cpu/feat_ctl.c
new file mode 100644
index 000000000000..c4f8f767853b
--- /dev/null
+++ b/arch/x86/kernel/cpu/feat_ctl.c
@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/tboot.h>
+
+#include <asm/cpufeature.h>
+#include <asm/msr-index.h>
+#include <asm/processor.h>
+
+void init_ia32_feat_ctl(struct cpuinfo_x86 *c)
+{
+	u64 msr;
+
+	if (rdmsrl_safe(MSR_IA32_FEAT_CTL, &msr))
+		return;
+
+	if (msr & FEAT_CTL_LOCKED)
+		return;
+
+	/*
+	 * Ignore whatever value BIOS left in the MSR to avoid enabling random
+	 * features or faulting on the WRMSR.
+	 */
+	msr = FEAT_CTL_LOCKED;
+
+	/*
+	 * Enable VMX if and only if the kernel may do VMXON at some point,
+	 * i.e. KVM is enabled, to avoid unnecessarily adding an attack vector
+	 * for the kernel, e.g. using VMX to hide malicious code.
+	 */
+	if (cpu_has(c, X86_FEATURE_VMX) && IS_ENABLED(CONFIG_KVM_INTEL)) {
+		msr |= FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX;
+
+		if (tboot_enabled())
+			msr |= FEAT_CTL_VMX_ENABLED_INSIDE_SMX;
+	}
+
+	wrmsrl(MSR_IA32_FEAT_CTL, msr);
+}
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 4a900804a023..9129c170ea11 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -755,6 +755,8 @@ static void init_intel(struct cpuinfo_x86 *c)
 	/* Work around errata */
 	srat_detect_node(c);
 
+	init_ia32_feat_ctl(c);
+
 	if (cpu_has(c, X86_FEATURE_VMX))
 		detect_vmx_virtcap(c);
 
-- 
2.24.0


^ permalink raw reply	[flat|nested] 23+ messages in thread

* [PATCH v4 05/19] x86/mce: WARN once if IA32_FEAT_CTL MSR is left unlocked
  2019-11-28  1:39 [PATCH v4 00/19] x86/cpu: Clean up handling of VMX features Sean Christopherson
                   ` (3 preceding siblings ...)
  2019-11-28  1:40 ` [PATCH v4 04/19] x86/intel: Initialize IA32_FEAT_CTL MSR at boot Sean Christopherson
@ 2019-11-28  1:40 ` Sean Christopherson
  2019-11-28  1:40 ` [PATCH v4 06/19] x86/centaur: Use common IA32_FEAT_CTL MSR initialization Sean Christopherson
                   ` (13 subsequent siblings)
  18 siblings, 0 replies; 23+ messages in thread
From: Sean Christopherson @ 2019-11-28  1:40 UTC (permalink / raw)
  To: Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86
  Cc: H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan,
	linux-kernel, kvm, linux-edac, linux-pm, linux-kselftest,
	Borislav Petkov, Jarkko Sakkinen

WARN if the IA32_FEAT_CTL MSR is somehow left unlocked now that CPU
initialization unconditionally locks the MSR.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/kernel/cpu/mce/intel.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kernel/cpu/mce/intel.c b/arch/x86/kernel/cpu/mce/intel.c
index c238518b84a2..5627b1091b85 100644
--- a/arch/x86/kernel/cpu/mce/intel.c
+++ b/arch/x86/kernel/cpu/mce/intel.c
@@ -116,14 +116,15 @@ static bool lmce_supported(void)
 	/*
 	 * BIOS should indicate support for LMCE by setting bit 20 in
 	 * IA32_FEAT_CTL without which touching MCG_EXT_CTL will generate a #GP
-	 * fault.
+	 * fault.  The MSR must also be locked for LMCE_ENABLED to take effect.
+	 * WARN if the MSR isn't locked as init_ia32_feat_ctl() unconditionally
+	 * locks the MSR in the event that it wasn't already locked by BIOS.
 	 */
 	rdmsrl(MSR_IA32_FEAT_CTL, tmp);
-	if ((tmp & (FEAT_CTL_LOCKED | FEAT_CTL_LMCE_ENABLED)) ==
-		   (FEAT_CTL_LOCKED | FEAT_CTL_LMCE_ENABLED))
-		return true;
+	if (WARN_ON_ONCE(!(tmp & FEAT_CTL_LOCKED)))
+		return false;
 
-	return false;
+	return tmp & FEAT_CTL_LMCE_ENABLED;
 }
 
 bool mce_intel_cmci_poll(void)
-- 
2.24.0


^ permalink raw reply	[flat|nested] 23+ messages in thread

* [PATCH v4 06/19] x86/centaur: Use common IA32_FEAT_CTL MSR initialization
  2019-11-28  1:39 [PATCH v4 00/19] x86/cpu: Clean up handling of VMX features Sean Christopherson
                   ` (4 preceding siblings ...)
  2019-11-28  1:40 ` [PATCH v4 05/19] x86/mce: WARN once if IA32_FEAT_CTL MSR is left unlocked Sean Christopherson
@ 2019-11-28  1:40 ` Sean Christopherson
  2019-11-28  1:40 ` [PATCH v4 07/19] x86/zhaoxin: " Sean Christopherson
                   ` (12 subsequent siblings)
  18 siblings, 0 replies; 23+ messages in thread
From: Sean Christopherson @ 2019-11-28  1:40 UTC (permalink / raw)
  To: Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86
  Cc: H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan,
	linux-kernel, kvm, linux-edac, linux-pm, linux-kselftest,
	Borislav Petkov, Jarkko Sakkinen

Use the recently added IA32_FEAT_CTL MSR initialization sequence to
opportunstically enable VMX support when running on a Centaur CPU.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/Kconfig.cpu          | 2 +-
 arch/x86/kernel/cpu/centaur.c | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index 98be76fa2978..cba5b64266df 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -389,7 +389,7 @@ config X86_DEBUGCTLMSR
 
 config IA32_FEAT_CTL
 	def_bool y
-	depends on CPU_SUP_INTEL
+	depends on CPU_SUP_INTEL || CPU_SUP_CENTAUR
 
 menuconfig PROCESSOR_SELECT
 	bool "Supported processor vendors" if EXPERT
diff --git a/arch/x86/kernel/cpu/centaur.c b/arch/x86/kernel/cpu/centaur.c
index 14433ff5b828..084f6040b4df 100644
--- a/arch/x86/kernel/cpu/centaur.c
+++ b/arch/x86/kernel/cpu/centaur.c
@@ -250,6 +250,8 @@ static void init_centaur(struct cpuinfo_x86 *c)
 	set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
 #endif
 
+	init_ia32_feat_ctl(c);
+
 	if (cpu_has(c, X86_FEATURE_VMX))
 		centaur_detect_vmx_virtcap(c);
 }
-- 
2.24.0


^ permalink raw reply	[flat|nested] 23+ messages in thread

* [PATCH v4 07/19] x86/zhaoxin: Use common IA32_FEAT_CTL MSR initialization
  2019-11-28  1:39 [PATCH v4 00/19] x86/cpu: Clean up handling of VMX features Sean Christopherson
                   ` (5 preceding siblings ...)
  2019-11-28  1:40 ` [PATCH v4 06/19] x86/centaur: Use common IA32_FEAT_CTL MSR initialization Sean Christopherson
@ 2019-11-28  1:40 ` " Sean Christopherson
  2019-11-28  1:40 ` [PATCH v4 08/19] x86/cpu: Clear VMX feature flag if VMX is not fully enabled Sean Christopherson
                   ` (11 subsequent siblings)
  18 siblings, 0 replies; 23+ messages in thread
From: Sean Christopherson @ 2019-11-28  1:40 UTC (permalink / raw)
  To: Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86
  Cc: H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan,
	linux-kernel, kvm, linux-edac, linux-pm, linux-kselftest,
	Borislav Petkov, Jarkko Sakkinen

Use the recently added IA32_FEAT_CTL MSR initialization sequence to
opportunstically enable VMX support when running on a Zhaoxin CPU.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/Kconfig.cpu          | 2 +-
 arch/x86/kernel/cpu/zhaoxin.c | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index cba5b64266df..526425fcaedc 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -389,7 +389,7 @@ config X86_DEBUGCTLMSR
 
 config IA32_FEAT_CTL
 	def_bool y
-	depends on CPU_SUP_INTEL || CPU_SUP_CENTAUR
+	depends on CPU_SUP_INTEL || CPU_SUP_CENTAUR || CPU_SUP_ZHAOXIN
 
 menuconfig PROCESSOR_SELECT
 	bool "Supported processor vendors" if EXPERT
diff --git a/arch/x86/kernel/cpu/zhaoxin.c b/arch/x86/kernel/cpu/zhaoxin.c
index 8e6f2f4b4afe..630a1450ea70 100644
--- a/arch/x86/kernel/cpu/zhaoxin.c
+++ b/arch/x86/kernel/cpu/zhaoxin.c
@@ -141,6 +141,8 @@ static void init_zhaoxin(struct cpuinfo_x86 *c)
 	set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
 #endif
 
+	init_ia32_feat_ctl(c);
+
 	if (cpu_has(c, X86_FEATURE_VMX))
 		zhaoxin_detect_vmx_virtcap(c);
 }
-- 
2.24.0


^ permalink raw reply	[flat|nested] 23+ messages in thread

* [PATCH v4 08/19] x86/cpu: Clear VMX feature flag if VMX is not fully enabled
  2019-11-28  1:39 [PATCH v4 00/19] x86/cpu: Clean up handling of VMX features Sean Christopherson
                   ` (6 preceding siblings ...)
  2019-11-28  1:40 ` [PATCH v4 07/19] x86/zhaoxin: " Sean Christopherson
@ 2019-11-28  1:40 ` Sean Christopherson
  2019-11-28  1:40 ` [PATCH v4 09/19] x86/vmx: Introduce VMX_FEATURES_* Sean Christopherson
                   ` (10 subsequent siblings)
  18 siblings, 0 replies; 23+ messages in thread
From: Sean Christopherson @ 2019-11-28  1:40 UTC (permalink / raw)
  To: Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86
  Cc: H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan,
	linux-kernel, kvm, linux-edac, linux-pm, linux-kselftest,
	Borislav Petkov, Jarkko Sakkinen

Now that IA32_FEAT_CTL is always configured and locked for CPUs that are
known to support VMX[*], clear the VMX capability flag if the MSR is
unsupported or BIOS disabled VMX, i.e. locked IA32_FEAT_CTL and didn't
set the appropriate VMX enable bit.

[*] Because init_ia32_feat_ctl() is called from vendors ->c_init(), it's
    still possible for IA32_FEAT_CTL to be left unlocked when VMX is
    supported by the CPU.  This is not fatal, and will be addressed in a
    future patch.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/kernel/cpu/feat_ctl.c | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/cpu/feat_ctl.c b/arch/x86/kernel/cpu/feat_ctl.c
index c4f8f767853b..a46c9e46f937 100644
--- a/arch/x86/kernel/cpu/feat_ctl.c
+++ b/arch/x86/kernel/cpu/feat_ctl.c
@@ -5,15 +5,21 @@
 #include <asm/msr-index.h>
 #include <asm/processor.h>
 
+#undef pr_fmt
+#define pr_fmt(fmt)	"x86/cpu: " fmt
+
 void init_ia32_feat_ctl(struct cpuinfo_x86 *c)
 {
+	bool tboot = tboot_enabled();
 	u64 msr;
 
-	if (rdmsrl_safe(MSR_IA32_FEAT_CTL, &msr))
+	if (rdmsrl_safe(MSR_IA32_FEAT_CTL, &msr)) {
+		clear_cpu_cap(c, X86_FEATURE_VMX);
 		return;
+	}
 
 	if (msr & FEAT_CTL_LOCKED)
-		return;
+		goto update_caps;
 
 	/*
 	 * Ignore whatever value BIOS left in the MSR to avoid enabling random
@@ -29,9 +35,20 @@ void init_ia32_feat_ctl(struct cpuinfo_x86 *c)
 	if (cpu_has(c, X86_FEATURE_VMX) && IS_ENABLED(CONFIG_KVM_INTEL)) {
 		msr |= FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX;
 
-		if (tboot_enabled())
+		if (tboot)
 			msr |= FEAT_CTL_VMX_ENABLED_INSIDE_SMX;
 	}
 
 	wrmsrl(MSR_IA32_FEAT_CTL, msr);
+
+update_caps:
+	if (!cpu_has(c, X86_FEATURE_VMX))
+		return;
+
+	if ( (tboot && !(msr & FEAT_CTL_VMX_ENABLED_INSIDE_SMX)) ||
+	    (!tboot && !(msr & FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX))) {
+		pr_err_once("VMX (%s TXT) disabled by BIOS\n",
+			    tboot ? "inside" : "outside");
+		clear_cpu_cap(c, X86_FEATURE_VMX);
+	}
 }
-- 
2.24.0


^ permalink raw reply	[flat|nested] 23+ messages in thread

* [PATCH v4 09/19] x86/vmx: Introduce VMX_FEATURES_*
  2019-11-28  1:39 [PATCH v4 00/19] x86/cpu: Clean up handling of VMX features Sean Christopherson
                   ` (7 preceding siblings ...)
  2019-11-28  1:40 ` [PATCH v4 08/19] x86/cpu: Clear VMX feature flag if VMX is not fully enabled Sean Christopherson
@ 2019-11-28  1:40 ` Sean Christopherson
  2019-11-28  1:40 ` [PATCH v4 10/19] x86/cpu: Detect VMX features on Intel, Centaur and Zhaoxin CPUs Sean Christopherson
                   ` (9 subsequent siblings)
  18 siblings, 0 replies; 23+ messages in thread
From: Sean Christopherson @ 2019-11-28  1:40 UTC (permalink / raw)
  To: Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86
  Cc: H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan,
	linux-kernel, kvm, linux-edac, linux-pm, linux-kselftest,
	Borislav Petkov, Jarkko Sakkinen

Add a VMX specific variant of X86_FEATURE_* flags, which will eventually
supplant the synthetic VMX flags defined in cpufeatures word 8.  Use the
Intel-defined layouts for the major VMX execution controls so that their
word entries can be directly populated from their respective MSRs, and
so that the VMX_FEATURE_* flags can be used to define the existing bit
definitions in asm/vmx.h, i.e. force developers to define a VMX_FEATURE
flag when adding support for a new hardware feature.

The majority of Intel's (and compatible CPU's) VMX capabilities are
enumerated via MSRs and not CPUID, i.e. querying /proc/cpuinfo doesn't
naturally provide any insight into the virtualization capabilities of
VMX enabled CPUs.  Commit e38e05a85828d ("x86: extended "flags" to show
virtualization HW feature in /proc/cpuinfo") attempted to address the
issue by synthesizing select VMX features into a Linux-defined word in
cpufeatures.

Lack of reporting of VMX capabilities via /proc/cpuinfo is problematic
because there is no sane way for a user to query the capabilities of
their platform, e.g. when trying to find a platform to test a feature or
debug an issue that has a hardware dependency.  Lack of reporting is
especially problematic when the user isn't familiar with VMX, e.g. the
format of the MSRs is non-standard, existence of some MSRs is reported
by bits in other MSRs, several "features" from KVM's point of view are
enumerated as 3+ distinct features by hardware, etc...

The synthetic cpufeatures approach has several flaws:

  - The set of synthesized VMX flags has become extremely stale with
    respect to the full set of VMX features, e.g. only one new flag
    (EPT A/D) has been added in the the decade since the introduction of
    the synthetic VMX features.  Failure to keep the VMX flags up to
    date is likely due to the lack of a mechanism that forces developers
    to consider whether or not a new feature is worth reporting.

  - The synthetic flags may incorrectly be misinterpreted as affecting
    kernel behavior, i.e. KVM, the kernel's sole consumer of VMX,
    completely ignores the synthetic flags.

  - New CPU vendors that support VMX have duplicated the hideous code
    that propagates VMX features from MSRs to cpufeatures.  Bringing the
    synthetic VMX flags up to date would exacerbate the copy+paste
    trainwreck.

Define separate VMX_FEATURE flags to set the stage for enumerating VMX
capabilities outside of the cpu_has() framework, and for adding
functional usage of VMX_FEATURE_* to help ensure the features reported
via /proc/cpuinfo is up to date with respect to kernel recognition of
VMX capabilities.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 MAINTAINERS                        |  2 +-
 arch/x86/include/asm/processor.h   |  1 +
 arch/x86/include/asm/vmxfeatures.h | 81 ++++++++++++++++++++++++++++++
 3 files changed, 83 insertions(+), 1 deletion(-)
 create mode 100644 arch/x86/include/asm/vmxfeatures.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 31ea754560bd..d1f0fd8dc2c5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9107,7 +9107,7 @@ F:	arch/x86/include/uapi/asm/svm.h
 F:	arch/x86/include/asm/kvm*
 F:	arch/x86/include/asm/pvclock-abi.h
 F:	arch/x86/include/asm/svm.h
-F:	arch/x86/include/asm/vmx.h
+F:	arch/x86/include/asm/vmx*.h
 F:	arch/x86/kernel/kvm.c
 F:	arch/x86/kernel/kvmclock.c
 
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 0340aad3f2fc..bab513404606 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -25,6 +25,7 @@ struct vm86;
 #include <asm/special_insns.h>
 #include <asm/fpu/types.h>
 #include <asm/unwind_hints.h>
+#include <asm/vmxfeatures.h>
 
 #include <linux/personality.h>
 #include <linux/cache.h>
diff --git a/arch/x86/include/asm/vmxfeatures.h b/arch/x86/include/asm/vmxfeatures.h
new file mode 100644
index 000000000000..1b96b03c1147
--- /dev/null
+++ b/arch/x86/include/asm/vmxfeatures.h
@@ -0,0 +1,81 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_X86_VMXFEATURES_H
+#define _ASM_X86_VMXFEATURES_H
+
+/*
+ * Note: If the comment begins with a quoted string, that string is used
+ * in /proc/cpuinfo instead of the macro name.  If the string is "",
+ * this feature bit is not displayed in /proc/cpuinfo at all.
+ */
+
+/* Pin-Based VM-Execution Controls, EPT/VPID, APIC and VM-Functions, word 0 */
+#define VMX_FEATURE_INTR_EXITING	( 0*32+  0) /* "" VM-Exit on vectored interrupts */
+#define VMX_FEATURE_NMI_EXITING		( 0*32+  3) /* "" VM-Exit on NMIs */
+#define VMX_FEATURE_VIRTUAL_NMIS	( 0*32+  5) /* NMI virtualization */
+#define VMX_FEATURE_PREEMPTION_TIMER	( 0*32+  6) /* VMX Preemption Timer */
+#define VMX_FEATURE_POSTED_INTR		( 0*32+  7) /* Posted Interrupts */
+
+/* EPT/VPID features, scattered to bits 16-23 */
+#define VMX_FEATURE_INVVPID		( 0*32+ 16) /* INVVPID is supported */
+#define VMX_FEATURE_EPT_EXECUTE_ONLY	( 0*32+ 17) /* "ept_x_only" EPT entries can be execute only */
+#define VMX_FEATURE_EPT_AD		( 0*32+ 18) /* EPT Accessed/Dirty bits */
+#define VMX_FEATURE_EPT_1GB		( 0*32+ 19) /* 1GB EPT pages */
+
+/* Aggregated APIC features 24-27 */
+#define VMX_FEATURE_FLEXPRIORITY	( 0*32+ 24) /* TPR shadow + virt APIC */
+#define VMX_FEATURE_APICV	        ( 0*32+ 25) /* TPR shadow + APIC reg virt + virt intr delivery + posted interrupts */
+
+/* VM-Functions, shifted to bits 28-31 */
+#define VMX_FEATURE_EPTP_SWITCHING	( 0*32+ 28) /* EPTP switching (in guest) */
+
+/* Primary Processor-Based VM-Execution Controls, word 1 */
+#define VMX_FEATURE_VIRTUAL_INTR_PENDING ( 1*32+  2) /* "" VM-Exit if INTRs are unblocked in guest */
+#define VMX_FEATURE_TSC_OFFSETTING	( 1*32+  3) /* Offset hardware TSC when read in guest */
+#define VMX_FEATURE_HLT_EXITING		( 1*32+  7) /* "" VM-Exit on HLT */
+#define VMX_FEATURE_INVLPG_EXITING	( 1*32+  9) /* "" VM-Exit on INVLPG */
+#define VMX_FEATURE_MWAIT_EXITING	( 1*32+ 10) /* "" VM-Exit on MWAIT */
+#define VMX_FEATURE_RDPMC_EXITING	( 1*32+ 11) /* "" VM-Exit on RDPMC */
+#define VMX_FEATURE_RDTSC_EXITING	( 1*32+ 12) /* "" VM-Exit on RDTSC */
+#define VMX_FEATURE_CR3_LOAD_EXITING	( 1*32+ 15) /* "" VM-Exit on writes to CR3 */
+#define VMX_FEATURE_CR3_STORE_EXITING	( 1*32+ 16) /* "" VM-Exit on reads from CR3 */
+#define VMX_FEATURE_CR8_LOAD_EXITING	( 1*32+ 19) /* "" VM-Exit on writes to CR8 */
+#define VMX_FEATURE_CR8_STORE_EXITING	( 1*32+ 20) /* "" VM-Exit on reads from CR8 */
+#define VMX_FEATURE_VIRTUAL_TPR		( 1*32+ 21) /* TPR virtualization, a.k.a. TPR shadow */
+#define VMX_FEATURE_VIRTUAL_NMI_PENDING	( 1*32+ 22) /* "" VM-Exit if NMIs are unblocked in guest */
+#define VMX_FEATURE_MOV_DR_EXITING	( 1*32+ 23) /* "" VM-Exit on accesses to debug registers */
+#define VMX_FEATURE_UNCOND_IO_EXITING	( 1*32+ 24) /* "" VM-Exit on *all* IN{S} and OUT{S}*/
+#define VMX_FEATURE_USE_IO_BITMAPS	( 1*32+ 25) /* "" VM-Exit based on I/O port */
+#define VMX_FEATURE_MONITOR_TRAP_FLAG	( 1*32+ 27) /* "mtf" VMX single-step VM-Exits */
+#define VMX_FEATURE_USE_MSR_BITMAPS	( 1*32+ 28) /* "" VM-Exit based on MSR index */
+#define VMX_FEATURE_MONITOR_EXITING	( 1*32+ 29) /* "" VM-Exit on MONITOR (MWAIT's accomplice) */
+#define VMX_FEATURE_PAUSE_EXITING	( 1*32+ 30) /* "" VM-Exit on PAUSE (unconditionally) */
+#define VMX_FEATURE_SEC_CONTROLS	( 1*32+ 31) /* "" Enable Secondary VM-Execution Controls */
+
+/* Secondary Processor-Based VM-Execution Controls, word 2 */
+#define VMX_FEATURE_VIRT_APIC_ACCESSES	( 2*32+  0) /* Virtualize memory mapped APIC accesses */
+#define VMX_FEATURE_EPT			( 2*32+  1) /* Extended Page Tables, a.k.a. Two-Dimensional Paging */
+#define VMX_FEATURE_DESC_EXITING	( 2*32+  2) /* "" VM-Exit on {S,L}*DT instructions */
+#define VMX_FEATURE_RDTSCP		( 2*32+  3) /* "" Enable RDTSCP in guest */
+#define VMX_FEATURE_VIRTUAL_X2APIC	( 2*32+  4) /* "" Virtualize X2APIC for the guest */
+#define VMX_FEATURE_VPID		( 2*32+  5) /* Virtual Processor ID (TLB ASID modifier) */
+#define VMX_FEATURE_WBINVD_EXITING	( 2*32+  6) /* "" VM-Exit on WBINVD */
+#define VMX_FEATURE_UNRESTRICTED_GUEST	( 2*32+  7) /* Allow Big Real Mode and other "invalid" states */
+#define VMX_FEATURE_APIC_REGISTER_VIRT	( 2*32+  8) /* Hardware emulation of reads to the virtual-APIC */
+#define VMX_FEATURE_VIRT_INTR_DELIVERY	( 2*32+  9) /* Evaluation and delivery of pending virtual interrupts */
+#define VMX_FEATURE_PAUSE_LOOP_EXITING	( 2*32+ 10) /* "ple" Conditionally VM-Exit on PAUSE at CPL0 */
+#define VMX_FEATURE_RDRAND_EXITING	( 2*32+ 11) /* "" VM-Exit on RDRAND*/
+#define VMX_FEATURE_INVPCID		( 2*32+ 12) /* "" Enable INVPCID in guest */
+#define VMX_FEATURE_VMFUNC		( 2*32+ 13) /* "" Enable VM-Functions (leaf dependent) */
+#define VMX_FEATURE_SHADOW_VMCS		( 2*32+ 14) /* VMREAD/VMWRITE in guest can access shadow VMCS */
+#define VMX_FEATURE_ENCLS_EXITING	( 2*32+ 15) /* "" VM-Exit on ENCLS (leaf dependent) */
+#define VMX_FEATURE_RDSEED_EXITING	( 2*32+ 16) /* "" VM-Exit on RDSEED */
+#define VMX_FEATURE_PAGE_MOD_LOGGING	( 2*32+ 17) /* "pml" Log dirty pages into buffer */
+#define VMX_FEATURE_EPT_VIOLATION_VE	( 2*32+ 18) /* "" Conditionally reflect EPT violations as #VE exceptions */
+#define VMX_FEATURE_PT_CONCEAL_VMX	( 2*32+ 19) /* "" Suppress VMX indicators in Processor Trace */
+#define VMX_FEATURE_XSAVES		( 2*32+ 20) /* "" Enable XSAVES and XRSTORS in guest */
+#define VMX_FEATURE_MODE_BASED_EPT_EXEC	( 2*32+ 22) /* Enable separate EPT EXEC bits for supervisor vs. user */
+#define VMX_FEATURE_PT_USE_GPA		( 2*32+ 24) /* "" Processor Trace logs GPAs */
+#define VMX_FEATURE_TSC_SCALING		( 2*32+ 25) /* Scale hardware TSC when read in guest */
+#define VMX_FEATURE_ENCLV_EXITING	( 2*32+ 28) /* "" VM-Exit on ENCLV (leaf dependent) */
+
+#endif /* _ASM_X86_VMXFEATURES_H */
-- 
2.24.0


^ permalink raw reply	[flat|nested] 23+ messages in thread

* [PATCH v4 10/19] x86/cpu: Detect VMX features on Intel, Centaur and Zhaoxin CPUs
  2019-11-28  1:39 [PATCH v4 00/19] x86/cpu: Clean up handling of VMX features Sean Christopherson
                   ` (8 preceding siblings ...)
  2019-11-28  1:40 ` [PATCH v4 09/19] x86/vmx: Introduce VMX_FEATURES_* Sean Christopherson
@ 2019-11-28  1:40 ` Sean Christopherson
  2019-11-28  1:40 ` [PATCH v4 11/19] x86/cpu: Print VMX flags in /proc/cpuinfo using VMX_FEATURES_* Sean Christopherson
                   ` (8 subsequent siblings)
  18 siblings, 0 replies; 23+ messages in thread
From: Sean Christopherson @ 2019-11-28  1:40 UTC (permalink / raw)
  To: Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86
  Cc: H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan,
	linux-kernel, kvm, linux-edac, linux-pm, linux-kselftest,
	Borislav Petkov, Jarkko Sakkinen

Add an entry in struct cpuinfo_x86 to track VMX capabilities and fill
the capabilities during IA32_FEAT_CTL MSR initialization.

Make the VMX capabilities dependent on IA32_FEAT_CTL and
X86_FEATURE_NAMES so as to avoid unnecessary overhead on CPUs that can't
possibly support VMX, or when /proc/cpuinfo is not available.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/Kconfig.cpu               |  4 ++
 arch/x86/include/asm/processor.h   |  3 ++
 arch/x86/include/asm/vmxfeatures.h |  5 +++
 arch/x86/kernel/cpu/common.c       |  3 ++
 arch/x86/kernel/cpu/feat_ctl.c     | 70 ++++++++++++++++++++++++++++++
 5 files changed, 85 insertions(+)

diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index 526425fcaedc..bc3a497c029c 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -391,6 +391,10 @@ config IA32_FEAT_CTL
 	def_bool y
 	depends on CPU_SUP_INTEL || CPU_SUP_CENTAUR || CPU_SUP_ZHAOXIN
 
+config X86_VMX_FEATURE_NAMES
+	def_bool y
+	depends on IA32_FEAT_CTL && X86_FEATURE_NAMES
+
 menuconfig PROCESSOR_SELECT
 	bool "Supported processor vendors" if EXPERT
 	---help---
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index bab513404606..3324cf036dfb 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -85,6 +85,9 @@ struct cpuinfo_x86 {
 #ifdef CONFIG_X86_64
 	/* Number of 4K pages in DTLB/ITLB combined(in pages): */
 	int			x86_tlbsize;
+#endif
+#ifdef CONFIG_X86_VMX_FEATURE_NAMES
+	__u32			vmx_capability[NVMXINTS];
 #endif
 	__u8			x86_virt_bits;
 	__u8			x86_phys_bits;
diff --git a/arch/x86/include/asm/vmxfeatures.h b/arch/x86/include/asm/vmxfeatures.h
index 1b96b03c1147..ab42d94e2359 100644
--- a/arch/x86/include/asm/vmxfeatures.h
+++ b/arch/x86/include/asm/vmxfeatures.h
@@ -2,6 +2,11 @@
 #ifndef _ASM_X86_VMXFEATURES_H
 #define _ASM_X86_VMXFEATURES_H
 
+/*
+ * Defines VMX CPU feature bits
+ */
+#define NVMXINTS			3 /* N 32-bit words worth of info */
+
 /*
  * Note: If the comment begins with a quoted string, that string is used
  * in /proc/cpuinfo instead of the macro name.  If the string is "",
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 9d6a35a4586e..df1eacd26443 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1449,6 +1449,9 @@ static void identify_cpu(struct cpuinfo_x86 *c)
 #endif
 	c->x86_cache_alignment = c->x86_clflush_size;
 	memset(&c->x86_capability, 0, sizeof(c->x86_capability));
+#ifdef CONFIG_X86_VMX_FEATURE_NAMES
+	memset(&c->vmx_capability, 0, sizeof(c->vmx_capability));
+#endif
 
 	generic_identify(c);
 
diff --git a/arch/x86/kernel/cpu/feat_ctl.c b/arch/x86/kernel/cpu/feat_ctl.c
index a46c9e46f937..93268bde662a 100644
--- a/arch/x86/kernel/cpu/feat_ctl.c
+++ b/arch/x86/kernel/cpu/feat_ctl.c
@@ -4,6 +4,72 @@
 #include <asm/cpufeature.h>
 #include <asm/msr-index.h>
 #include <asm/processor.h>
+#include <asm/vmx.h>
+
+#ifdef CONFIG_X86_VMX_FEATURE_NAMES
+enum vmx_feature_leafs {
+	MISC_FEATURES = 0,
+	PRIMARY_PROC_CTLS,
+	SECONDARY_PROC_CTLS,
+	NR_VMX_FEATURE_WORDS,
+};
+
+#define F(x) BIT(VMX_FEATURE_##x & 0x1f)
+
+static void init_vmx_capabilities(struct cpuinfo_x86 *c)
+{
+	u32 supported, funcs, ept, vpid, ign;
+
+	BUILD_BUG_ON(NVMXINTS != NR_VMX_FEATURE_WORDS);
+
+	/*
+	 * The high bits contain the allowed-1 settings, i.e. features that can
+	 * be turned on.  The low bits contain the allowed-0 settings, i.e.
+	 * features that can be turned off.  Ignore the allowed-0 settings,
+	 * if a feature can be turned on then it's supported.
+	 */
+	rdmsr(MSR_IA32_VMX_PROCBASED_CTLS, ign, supported);
+	c->vmx_capability[PRIMARY_PROC_CTLS] = supported;
+
+	rdmsr_safe(MSR_IA32_VMX_PROCBASED_CTLS2, &ign, &supported);
+	c->vmx_capability[SECONDARY_PROC_CTLS] = supported;
+
+	rdmsr(MSR_IA32_VMX_PINBASED_CTLS, ign, supported);
+	rdmsr_safe(MSR_IA32_VMX_VMFUNC, &ign, &funcs);
+
+	/*
+	 * Except for EPT+VPID, which enumerates support for both in a single
+	 * MSR, low for EPT, high for VPID.
+	 */
+	rdmsr_safe(MSR_IA32_VMX_EPT_VPID_CAP, &ept, &vpid);
+
+	/* Pin, EPT, VPID and VM-Func are merged into a single word. */
+	WARN_ON_ONCE(supported >> 16);
+	WARN_ON_ONCE(funcs >> 4);
+	c->vmx_capability[MISC_FEATURES] = (supported & 0xffff) |
+					   ((vpid & 0x1) << 16) |
+					   ((funcs & 0xf) << 28);
+
+	/* EPT bits are full on scattered and must be manually handled. */
+	if (ept & VMX_EPT_EXECUTE_ONLY_BIT)
+		c->vmx_capability[MISC_FEATURES] |= F(EPT_EXECUTE_ONLY);
+	if (ept & VMX_EPT_AD_BIT)
+		c->vmx_capability[MISC_FEATURES] |= F(EPT_AD);
+	if (ept & VMX_EPT_1GB_PAGE_BIT)
+		c->vmx_capability[MISC_FEATURES] |= F(EPT_1GB);
+
+	/* Synthetic APIC features that are aggregates of multiple features. */
+	if ((c->vmx_capability[PRIMARY_PROC_CTLS] & F(VIRTUAL_TPR)) &&
+	    (c->vmx_capability[SECONDARY_PROC_CTLS] & F(VIRT_APIC_ACCESSES)))
+		c->vmx_capability[MISC_FEATURES] |= F(FLEXPRIORITY);
+
+	if ((c->vmx_capability[PRIMARY_PROC_CTLS] & F(VIRTUAL_TPR)) &&
+	    (c->vmx_capability[SECONDARY_PROC_CTLS] & F(APIC_REGISTER_VIRT)) &&
+	    (c->vmx_capability[SECONDARY_PROC_CTLS] & F(VIRT_INTR_DELIVERY)) &&
+	    (c->vmx_capability[MISC_FEATURES] & F(POSTED_INTR)))
+		c->vmx_capability[MISC_FEATURES] |= F(APICV);
+}
+#endif /* CONFIG_X86_VMX_FEATURE_NAMES */
 
 #undef pr_fmt
 #define pr_fmt(fmt)	"x86/cpu: " fmt
@@ -50,5 +116,9 @@ void init_ia32_feat_ctl(struct cpuinfo_x86 *c)
 		pr_err_once("VMX (%s TXT) disabled by BIOS\n",
 			    tboot ? "inside" : "outside");
 		clear_cpu_cap(c, X86_FEATURE_VMX);
+	} else {
+#ifdef CONFIG_X86_VMX_FEATURE_NAMES
+		init_vmx_capabilities(c);
+#endif
 	}
 }
-- 
2.24.0


^ permalink raw reply	[flat|nested] 23+ messages in thread

* [PATCH v4 11/19] x86/cpu: Print VMX flags in /proc/cpuinfo using VMX_FEATURES_*
  2019-11-28  1:39 [PATCH v4 00/19] x86/cpu: Clean up handling of VMX features Sean Christopherson
                   ` (9 preceding siblings ...)
  2019-11-28  1:40 ` [PATCH v4 10/19] x86/cpu: Detect VMX features on Intel, Centaur and Zhaoxin CPUs Sean Christopherson
@ 2019-11-28  1:40 ` Sean Christopherson
  2019-11-28  1:40 ` [PATCH v4 12/19] x86/cpu: Set synthetic VMX cpufeatures during init_ia32_feat_ctl() Sean Christopherson
                   ` (7 subsequent siblings)
  18 siblings, 0 replies; 23+ messages in thread
From: Sean Christopherson @ 2019-11-28  1:40 UTC (permalink / raw)
  To: Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86
  Cc: H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan,
	linux-kernel, kvm, linux-edac, linux-pm, linux-kselftest,
	Borislav Petkov, Jarkko Sakkinen

Add support for generating VMX feature names in capflags.c and use the
resulting x86_vmx_flags to print the VMX flags in /proc/cpuinfo.  Don't
print VMX flags if no bits are set in word 0, which holds Pin Controls.
Pin Control's INTR and NMI exiting are fundamental pillars of VMX, if
they are not supported then the CPU is broken, it does not actually
support VMX, or the kernel wasn't built with support for the target CPU.

Print the features in a dedicated "vmx flags" line to avoid polluting
the common "flags" and to avoid having to prefix all flags with "vmx_",
which results in horrendously long names.

Keep synthetic VMX flags in cpufeatures to preserve /proc/cpuinfo's ABI
for those flags.  This means that "flags" and "vmx flags" will have
duplicate entries for tpr_shadow (virtual_tpr), vnmi (virtual_nmis),
ept, flexpriority, vpid and ept_ad, but caps the pollution of "flags" at
those six VMX features.  The vendor specific code that populates the
synthetic flags will be consolidated in a future patch to futher
minimize the lasting damage.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/boot/mkcpustr.c          |  1 +
 arch/x86/kernel/cpu/Makefile      |  5 +++--
 arch/x86/kernel/cpu/mkcapflags.sh | 15 +++++++++++----
 arch/x86/kernel/cpu/proc.c        | 15 +++++++++++++++
 4 files changed, 30 insertions(+), 6 deletions(-)

diff --git a/arch/x86/boot/mkcpustr.c b/arch/x86/boot/mkcpustr.c
index 9caa10e82217..da0ccc5de538 100644
--- a/arch/x86/boot/mkcpustr.c
+++ b/arch/x86/boot/mkcpustr.c
@@ -15,6 +15,7 @@
 #include "../include/asm/required-features.h"
 #include "../include/asm/disabled-features.h"
 #include "../include/asm/cpufeatures.h"
+#include "../include/asm/vmxfeatures.h"
 #include "../kernel/cpu/capflags.c"
 
 int main(void)
diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile
index 4173b0de7a2f..dba6a83bc349 100644
--- a/arch/x86/kernel/cpu/Makefile
+++ b/arch/x86/kernel/cpu/Makefile
@@ -57,11 +57,12 @@ obj-$(CONFIG_ACRN_GUEST)		+= acrn.o
 
 ifdef CONFIG_X86_FEATURE_NAMES
 quiet_cmd_mkcapflags = MKCAP   $@
-      cmd_mkcapflags = $(CONFIG_SHELL) $(srctree)/$(src)/mkcapflags.sh $< $@
+      cmd_mkcapflags = $(CONFIG_SHELL) $(srctree)/$(src)/mkcapflags.sh $@ $^
 
 cpufeature = $(src)/../../include/asm/cpufeatures.h
+vmxfeature = $(src)/../../include/asm/vmxfeatures.h
 
-$(obj)/capflags.c: $(cpufeature) $(src)/mkcapflags.sh FORCE
+$(obj)/capflags.c: $(cpufeature) $(vmxfeature) $(src)/mkcapflags.sh FORCE
 	$(call if_changed,mkcapflags)
 endif
 targets += capflags.c
diff --git a/arch/x86/kernel/cpu/mkcapflags.sh b/arch/x86/kernel/cpu/mkcapflags.sh
index aed45b8895d5..1db560ed2ca3 100644
--- a/arch/x86/kernel/cpu/mkcapflags.sh
+++ b/arch/x86/kernel/cpu/mkcapflags.sh
@@ -6,8 +6,7 @@
 
 set -e
 
-IN=$1
-OUT=$2
+OUT=$1
 
 dump_array()
 {
@@ -15,6 +14,7 @@ dump_array()
 	SIZE=$2
 	PFX=$3
 	POSTFIX=$4
+	IN=$5
 
 	PFX_SZ=$(echo $PFX | wc -c)
 	TABS="$(printf '\t\t\t\t\t')"
@@ -57,11 +57,18 @@ trap 'rm "$OUT"' EXIT
 	echo "#endif"
 	echo ""
 
-	dump_array "x86_cap_flags" "NCAPINTS*32" "X86_FEATURE_" ""
+	dump_array "x86_cap_flags" "NCAPINTS*32" "X86_FEATURE_" "" $2
 	echo ""
 
-	dump_array "x86_bug_flags" "NBUGINTS*32" "X86_BUG_" "NCAPINTS*32"
+	dump_array "x86_bug_flags" "NBUGINTS*32" "X86_BUG_" "NCAPINTS*32" $2
+	echo ""
 
+	echo "#ifdef CONFIG_X86_VMX_FEATURE_NAMES"
+	echo "#ifndef _ASM_X86_VMXFEATURES_H"
+	echo "#include <asm/vmxfeatures.h>"
+	echo "#endif"
+	dump_array "x86_vmx_flags" "NVMXINTS*32" "VMX_FEATURE_" "" $3
+	echo "#endif /* CONFIG_X86_VMX_FEATURE_NAMES */"
 ) > $OUT
 
 trap - EXIT
diff --git a/arch/x86/kernel/cpu/proc.c b/arch/x86/kernel/cpu/proc.c
index cb2e49810d68..4eec8889b0ff 100644
--- a/arch/x86/kernel/cpu/proc.c
+++ b/arch/x86/kernel/cpu/proc.c
@@ -7,6 +7,10 @@
 
 #include "cpu.h"
 
+#ifdef CONFIG_X86_VMX_FEATURE_NAMES
+extern const char * const x86_vmx_flags[NVMXINTS*32];
+#endif
+
 /*
  *	Get CPU information for use by the procfs.
  */
@@ -102,6 +106,17 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 		if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
 			seq_printf(m, " %s", x86_cap_flags[i]);
 
+#ifdef CONFIG_X86_VMX_FEATURE_NAMES
+	if (cpu_has(c, X86_FEATURE_VMX) && c->vmx_capability[0]) {
+		seq_puts(m, "\nvmx flags\t:");
+		for (i = 0; i < 32*NVMXINTS; i++) {
+			if (test_bit(i, (unsigned long *)c->vmx_capability) &&
+			    x86_vmx_flags[i] != NULL)
+				seq_printf(m, " %s", x86_vmx_flags[i]);
+		}
+	}
+#endif
+
 	seq_puts(m, "\nbugs\t\t:");
 	for (i = 0; i < 32*NBUGINTS; i++) {
 		unsigned int bug_bit = 32*NCAPINTS + i;
-- 
2.24.0


^ permalink raw reply	[flat|nested] 23+ messages in thread

* [PATCH v4 12/19] x86/cpu: Set synthetic VMX cpufeatures during init_ia32_feat_ctl()
  2019-11-28  1:39 [PATCH v4 00/19] x86/cpu: Clean up handling of VMX features Sean Christopherson
                   ` (10 preceding siblings ...)
  2019-11-28  1:40 ` [PATCH v4 11/19] x86/cpu: Print VMX flags in /proc/cpuinfo using VMX_FEATURES_* Sean Christopherson
@ 2019-11-28  1:40 ` Sean Christopherson
  2019-11-28  1:40 ` [PATCH v4 13/19] x86/cpufeatures: Add flag to track whether MSR IA32_FEAT_CTL is configured Sean Christopherson
                   ` (6 subsequent siblings)
  18 siblings, 0 replies; 23+ messages in thread
From: Sean Christopherson @ 2019-11-28  1:40 UTC (permalink / raw)
  To: Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86
  Cc: H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan,
	linux-kernel, kvm, linux-edac, linux-pm, linux-kselftest,
	Borislav Petkov, Jarkko Sakkinen

Set the synthetic VMX cpufeatures, which need to be kept to preserve
/proc/cpuinfo's ABI, in the common IA32_FEAT_CTL initialization code.
Remove the vendor code that manually sets the synthetic flags.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/kernel/cpu/centaur.c  | 35 ------------------------
 arch/x86/kernel/cpu/feat_ctl.c | 14 ++++++++++
 arch/x86/kernel/cpu/intel.c    | 49 ----------------------------------
 arch/x86/kernel/cpu/zhaoxin.c  | 35 ------------------------
 4 files changed, 14 insertions(+), 119 deletions(-)

diff --git a/arch/x86/kernel/cpu/centaur.c b/arch/x86/kernel/cpu/centaur.c
index 084f6040b4df..02d99feb333e 100644
--- a/arch/x86/kernel/cpu/centaur.c
+++ b/arch/x86/kernel/cpu/centaur.c
@@ -18,13 +18,6 @@
 #define RNG_ENABLED	(1 << 3)
 #define RNG_ENABLE	(1 << 6)	/* MSR_VIA_RNG */
 
-#define X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW	0x00200000
-#define X86_VMX_FEATURE_PROC_CTLS_VNMI		0x00400000
-#define X86_VMX_FEATURE_PROC_CTLS_2ND_CTLS	0x80000000
-#define X86_VMX_FEATURE_PROC_CTLS2_VIRT_APIC	0x00000001
-#define X86_VMX_FEATURE_PROC_CTLS2_EPT		0x00000002
-#define X86_VMX_FEATURE_PROC_CTLS2_VPID		0x00000020
-
 static void init_c3(struct cpuinfo_x86 *c)
 {
 	u32  lo, hi;
@@ -119,31 +112,6 @@ static void early_init_centaur(struct cpuinfo_x86 *c)
 	}
 }
 
-static void centaur_detect_vmx_virtcap(struct cpuinfo_x86 *c)
-{
-	u32 vmx_msr_low, vmx_msr_high, msr_ctl, msr_ctl2;
-
-	rdmsr(MSR_IA32_VMX_PROCBASED_CTLS, vmx_msr_low, vmx_msr_high);
-	msr_ctl = vmx_msr_high | vmx_msr_low;
-
-	if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW)
-		set_cpu_cap(c, X86_FEATURE_TPR_SHADOW);
-	if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_VNMI)
-		set_cpu_cap(c, X86_FEATURE_VNMI);
-	if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_2ND_CTLS) {
-		rdmsr(MSR_IA32_VMX_PROCBASED_CTLS2,
-		      vmx_msr_low, vmx_msr_high);
-		msr_ctl2 = vmx_msr_high | vmx_msr_low;
-		if ((msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_VIRT_APIC) &&
-		    (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW))
-			set_cpu_cap(c, X86_FEATURE_FLEXPRIORITY);
-		if (msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_EPT)
-			set_cpu_cap(c, X86_FEATURE_EPT);
-		if (msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_VPID)
-			set_cpu_cap(c, X86_FEATURE_VPID);
-	}
-}
-
 static void init_centaur(struct cpuinfo_x86 *c)
 {
 #ifdef CONFIG_X86_32
@@ -251,9 +219,6 @@ static void init_centaur(struct cpuinfo_x86 *c)
 #endif
 
 	init_ia32_feat_ctl(c);
-
-	if (cpu_has(c, X86_FEATURE_VMX))
-		centaur_detect_vmx_virtcap(c);
 }
 
 #ifdef CONFIG_X86_32
diff --git a/arch/x86/kernel/cpu/feat_ctl.c b/arch/x86/kernel/cpu/feat_ctl.c
index 93268bde662a..9435d82be623 100644
--- a/arch/x86/kernel/cpu/feat_ctl.c
+++ b/arch/x86/kernel/cpu/feat_ctl.c
@@ -68,6 +68,20 @@ static void init_vmx_capabilities(struct cpuinfo_x86 *c)
 	    (c->vmx_capability[SECONDARY_PROC_CTLS] & F(VIRT_INTR_DELIVERY)) &&
 	    (c->vmx_capability[MISC_FEATURES] & F(POSTED_INTR)))
 		c->vmx_capability[MISC_FEATURES] |= F(APICV);
+
+	/* Set the synthetic cpufeatures to preserve /proc/cpuinfo's ABI. */
+	if (c->vmx_capability[PRIMARY_PROC_CTLS] & F(VIRTUAL_TPR))
+		set_cpu_cap(c, X86_FEATURE_TPR_SHADOW);
+	if (c->vmx_capability[MISC_FEATURES] & F(FLEXPRIORITY))
+		set_cpu_cap(c, X86_FEATURE_FLEXPRIORITY);
+	if (c->vmx_capability[MISC_FEATURES] & F(VIRTUAL_NMIS))
+		set_cpu_cap(c, X86_FEATURE_VNMI);
+	if (c->vmx_capability[SECONDARY_PROC_CTLS] & F(EPT))
+		set_cpu_cap(c, X86_FEATURE_EPT);
+	if (c->vmx_capability[MISC_FEATURES] & F(EPT_AD))
+		set_cpu_cap(c, X86_FEATURE_EPT_AD);
+	if (c->vmx_capability[MISC_FEATURES] & F(VPID))
+		set_cpu_cap(c, X86_FEATURE_VPID);
 }
 #endif /* CONFIG_X86_VMX_FEATURE_NAMES */
 
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 9129c170ea11..57473e2c0869 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -494,52 +494,6 @@ static void srat_detect_node(struct cpuinfo_x86 *c)
 #endif
 }
 
-static void detect_vmx_virtcap(struct cpuinfo_x86 *c)
-{
-	/* Intel VMX MSR indicated features */
-#define X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW	0x00200000
-#define X86_VMX_FEATURE_PROC_CTLS_VNMI		0x00400000
-#define X86_VMX_FEATURE_PROC_CTLS_2ND_CTLS	0x80000000
-#define X86_VMX_FEATURE_PROC_CTLS2_VIRT_APIC	0x00000001
-#define X86_VMX_FEATURE_PROC_CTLS2_EPT		0x00000002
-#define X86_VMX_FEATURE_PROC_CTLS2_VPID		0x00000020
-#define x86_VMX_FEATURE_EPT_CAP_AD		0x00200000
-
-	u32 vmx_msr_low, vmx_msr_high, msr_ctl, msr_ctl2;
-	u32 msr_vpid_cap, msr_ept_cap;
-
-	clear_cpu_cap(c, X86_FEATURE_TPR_SHADOW);
-	clear_cpu_cap(c, X86_FEATURE_VNMI);
-	clear_cpu_cap(c, X86_FEATURE_FLEXPRIORITY);
-	clear_cpu_cap(c, X86_FEATURE_EPT);
-	clear_cpu_cap(c, X86_FEATURE_VPID);
-	clear_cpu_cap(c, X86_FEATURE_EPT_AD);
-
-	rdmsr(MSR_IA32_VMX_PROCBASED_CTLS, vmx_msr_low, vmx_msr_high);
-	msr_ctl = vmx_msr_high | vmx_msr_low;
-	if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW)
-		set_cpu_cap(c, X86_FEATURE_TPR_SHADOW);
-	if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_VNMI)
-		set_cpu_cap(c, X86_FEATURE_VNMI);
-	if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_2ND_CTLS) {
-		rdmsr(MSR_IA32_VMX_PROCBASED_CTLS2,
-		      vmx_msr_low, vmx_msr_high);
-		msr_ctl2 = vmx_msr_high | vmx_msr_low;
-		if ((msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_VIRT_APIC) &&
-		    (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW))
-			set_cpu_cap(c, X86_FEATURE_FLEXPRIORITY);
-		if (msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_EPT) {
-			set_cpu_cap(c, X86_FEATURE_EPT);
-			rdmsr(MSR_IA32_VMX_EPT_VPID_CAP,
-			      msr_ept_cap, msr_vpid_cap);
-			if (msr_ept_cap & x86_VMX_FEATURE_EPT_CAP_AD)
-				set_cpu_cap(c, X86_FEATURE_EPT_AD);
-		}
-		if (msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_VPID)
-			set_cpu_cap(c, X86_FEATURE_VPID);
-	}
-}
-
 #define MSR_IA32_TME_ACTIVATE		0x982
 
 /* Helpers to access TME_ACTIVATE MSR */
@@ -757,9 +711,6 @@ static void init_intel(struct cpuinfo_x86 *c)
 
 	init_ia32_feat_ctl(c);
 
-	if (cpu_has(c, X86_FEATURE_VMX))
-		detect_vmx_virtcap(c);
-
 	if (cpu_has(c, X86_FEATURE_TME))
 		detect_tme(c);
 
diff --git a/arch/x86/kernel/cpu/zhaoxin.c b/arch/x86/kernel/cpu/zhaoxin.c
index 630a1450ea70..6b2d3b0a63e6 100644
--- a/arch/x86/kernel/cpu/zhaoxin.c
+++ b/arch/x86/kernel/cpu/zhaoxin.c
@@ -16,13 +16,6 @@
 #define RNG_ENABLED	(1 << 3)
 #define RNG_ENABLE	(1 << 8)	/* MSR_ZHAOXIN_RNG */
 
-#define X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW	0x00200000
-#define X86_VMX_FEATURE_PROC_CTLS_VNMI		0x00400000
-#define X86_VMX_FEATURE_PROC_CTLS_2ND_CTLS	0x80000000
-#define X86_VMX_FEATURE_PROC_CTLS2_VIRT_APIC	0x00000001
-#define X86_VMX_FEATURE_PROC_CTLS2_EPT		0x00000002
-#define X86_VMX_FEATURE_PROC_CTLS2_VPID		0x00000020
-
 static void init_zhaoxin_cap(struct cpuinfo_x86 *c)
 {
 	u32  lo, hi;
@@ -89,31 +82,6 @@ static void early_init_zhaoxin(struct cpuinfo_x86 *c)
 
 }
 
-static void zhaoxin_detect_vmx_virtcap(struct cpuinfo_x86 *c)
-{
-	u32 vmx_msr_low, vmx_msr_high, msr_ctl, msr_ctl2;
-
-	rdmsr(MSR_IA32_VMX_PROCBASED_CTLS, vmx_msr_low, vmx_msr_high);
-	msr_ctl = vmx_msr_high | vmx_msr_low;
-
-	if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW)
-		set_cpu_cap(c, X86_FEATURE_TPR_SHADOW);
-	if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_VNMI)
-		set_cpu_cap(c, X86_FEATURE_VNMI);
-	if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_2ND_CTLS) {
-		rdmsr(MSR_IA32_VMX_PROCBASED_CTLS2,
-		      vmx_msr_low, vmx_msr_high);
-		msr_ctl2 = vmx_msr_high | vmx_msr_low;
-		if ((msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_VIRT_APIC) &&
-		    (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW))
-			set_cpu_cap(c, X86_FEATURE_FLEXPRIORITY);
-		if (msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_EPT)
-			set_cpu_cap(c, X86_FEATURE_EPT);
-		if (msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_VPID)
-			set_cpu_cap(c, X86_FEATURE_VPID);
-	}
-}
-
 static void init_zhaoxin(struct cpuinfo_x86 *c)
 {
 	early_init_zhaoxin(c);
@@ -142,9 +110,6 @@ static void init_zhaoxin(struct cpuinfo_x86 *c)
 #endif
 
 	init_ia32_feat_ctl(c);
-
-	if (cpu_has(c, X86_FEATURE_VMX))
-		zhaoxin_detect_vmx_virtcap(c);
 }
 
 #ifdef CONFIG_X86_32
-- 
2.24.0


^ permalink raw reply	[flat|nested] 23+ messages in thread

* [PATCH v4 13/19] x86/cpufeatures: Add flag to track whether MSR IA32_FEAT_CTL is configured
  2019-11-28  1:39 [PATCH v4 00/19] x86/cpu: Clean up handling of VMX features Sean Christopherson
                   ` (11 preceding siblings ...)
  2019-11-28  1:40 ` [PATCH v4 12/19] x86/cpu: Set synthetic VMX cpufeatures during init_ia32_feat_ctl() Sean Christopherson
@ 2019-11-28  1:40 ` Sean Christopherson
  2019-11-28  1:40 ` [PATCH v4 14/19] KVM: VMX: Drop initialization of IA32_FEAT_CTL MSR Sean Christopherson
                   ` (5 subsequent siblings)
  18 siblings, 0 replies; 23+ messages in thread
From: Sean Christopherson @ 2019-11-28  1:40 UTC (permalink / raw)
  To: Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86
  Cc: H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan,
	linux-kernel, kvm, linux-edac, linux-pm, linux-kselftest,
	Borislav Petkov, Jarkko Sakkinen

Add a new feature flag, X86_FEATURE_MSR_IA32_FEAT_CTL, to track whether
IA32_FEAT_CTL has been initialized.  This will allow KVM, and any future
subsystems that depend on IA32_FEAT_CTL, to rely purely on cpufeatures
to query platform support, e.g. allows a future patch to remove KVM's
manual IA32_FEAT_CTL MSR checks.

Various features (on platforms that support IA32_FEAT_CTL) are dependent
on IA32_FEAT_CTL being configured and locked, e.g. VMX and LMCE.  The
MSR is always configured during boot, but only if the CPU vendor is
recognized by the kernel.  Because CPUID doesn't incorporate the current
IA32_FEAT_CTL value in its reporting of relevant features, it's possible
for a feature to be reported as supported in cpufeatures but not truly
enabled, e.g. if the CPU supports VMX but the kernel doesn't recognize
the CPU.

As a result, without the flag, KVM would see VMX as supported even if
IA32_FEAT_CTL hasn't been initialized, and so would need to manually
read the MSR and check the various enabling bits to avoid taking an
unexpected #GP on VMXON.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---

I tried darn hard to avoid this patch, but couldn't come up with a less
crappy alternative.  Arguably, letting KVM #GP in the above scenario is
acceptable because it means the user is doing something silly.  But, KVM
currently handles this scenario gracefully, and I think we'll have the
same conundrum for SGX.  Requiring KVM and SGX to check the MSR sort of
defeats the purpose of this series.

Another option I thought of was to call init_ia32_feat_ctl() from common
code, but that would mean taking a #GP on the RDMSR on AMD and company,
which seems far worse than adding a synthetic feature flag.

The last option I tried was to clear the VMX flag in default_init(), but
then we'd have to do the same for SGX and any other new features that get
dumped into IA32_FEAT_CTL, which again seems worse than adding a synthetic
flag.

 arch/x86/include/asm/cpufeatures.h | 1 +
 arch/x86/kernel/cpu/feat_ctl.c     | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h
index e9b62498fe75..67d21b25ff78 100644
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -220,6 +220,7 @@
 #define X86_FEATURE_ZEN			( 7*32+28) /* "" CPU is AMD family 0x17 (Zen) */
 #define X86_FEATURE_L1TF_PTEINV		( 7*32+29) /* "" L1TF workaround PTE inversion */
 #define X86_FEATURE_IBRS_ENHANCED	( 7*32+30) /* Enhanced IBRS */
+#define X86_FEATURE_MSR_IA32_FEAT_CTL	( 7*32+31) /* "" MSR IA32_FEAT_CTL configured */
 
 /* Virtualization flags: Linux defined, word 8 */
 #define X86_FEATURE_TPR_SHADOW		( 8*32+ 0) /* Intel TPR Shadow */
diff --git a/arch/x86/kernel/cpu/feat_ctl.c b/arch/x86/kernel/cpu/feat_ctl.c
index 9435d82be623..c3782c13c3f9 100644
--- a/arch/x86/kernel/cpu/feat_ctl.c
+++ b/arch/x86/kernel/cpu/feat_ctl.c
@@ -122,6 +122,8 @@ void init_ia32_feat_ctl(struct cpuinfo_x86 *c)
 	wrmsrl(MSR_IA32_FEAT_CTL, msr);
 
 update_caps:
+	set_cpu_cap(c, X86_FEATURE_MSR_IA32_FEAT_CTL);
+
 	if (!cpu_has(c, X86_FEATURE_VMX))
 		return;
 
-- 
2.24.0


^ permalink raw reply	[flat|nested] 23+ messages in thread

* [PATCH v4 14/19] KVM: VMX: Drop initialization of IA32_FEAT_CTL MSR
  2019-11-28  1:39 [PATCH v4 00/19] x86/cpu: Clean up handling of VMX features Sean Christopherson
                   ` (12 preceding siblings ...)
  2019-11-28  1:40 ` [PATCH v4 13/19] x86/cpufeatures: Add flag to track whether MSR IA32_FEAT_CTL is configured Sean Christopherson
@ 2019-11-28  1:40 ` Sean Christopherson
  2019-11-28  1:40 ` [PATCH v4 15/19] KVM: VMX: Use VMX feature flag to query BIOS enabling Sean Christopherson
                   ` (4 subsequent siblings)
  18 siblings, 0 replies; 23+ messages in thread
From: Sean Christopherson @ 2019-11-28  1:40 UTC (permalink / raw)
  To: Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86
  Cc: H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan,
	linux-kernel, kvm, linux-edac, linux-pm, linux-kselftest,
	Borislav Petkov, Jarkko Sakkinen

Remove KVM's code to initialize IA32_FEAT_CTL MSR when KVM is loaded now
that the MSR is initialized during boot on all CPUs that support VMX,
i.e. on all CPUs that can possibly load kvm_intel.

Note, don't WARN if IA32_FEAT_CTL is unlocked, even though the MSR is
unconditionally locked by init_ia32_feat_ctl().  KVM isn't tied directly
to a CPU vendor detection, whereas init_ia32_feat_ctl() is invoked if
and only if the CPU vendor is recognized and known to support VMX.  As a
result, vmx_disabled_by_bios() may be reached without going through
init_ia32_feat_ctl() and thus without locking IA32_FEAT_CTL.  This quirk
will be eliminated in a future patch.

Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/kvm/vmx/vmx.c | 48 +++++++++++++++++-------------------------
 1 file changed, 19 insertions(+), 29 deletions(-)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index ecf3ccf71bb2..50dd8026e718 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -2207,24 +2207,26 @@ static __init int vmx_disabled_by_bios(void)
 	u64 msr;
 
 	rdmsrl(MSR_IA32_FEAT_CTL, msr);
-	if (msr & FEAT_CTL_LOCKED) {
-		/* launched w/ TXT and VMX disabled */
-		if (!(msr & FEAT_CTL_VMX_ENABLED_INSIDE_SMX)
-			&& tboot_enabled())
-			return 1;
-		/* launched w/o TXT and VMX only enabled w/ TXT */
-		if (!(msr & FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX)
-			&& (msr & FEAT_CTL_VMX_ENABLED_INSIDE_SMX)
-			&& !tboot_enabled()) {
-			printk(KERN_WARNING "kvm: disable TXT in the BIOS or "
-				"activate TXT before enabling KVM\n");
-			return 1;
-		}
-		/* launched w/o TXT and VMX disabled */
-		if (!(msr & FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX)
-			&& !tboot_enabled())
-			return 1;
+
+	if (unlikely(!(msr & FEAT_CTL_LOCKED)))
+		return 1;
+
+	/* launched w/ TXT and VMX disabled */
+	if (!(msr & FEAT_CTL_VMX_ENABLED_INSIDE_SMX) &&
+	    tboot_enabled())
+		return 1;
+	/* launched w/o TXT and VMX only enabled w/ TXT */
+	if (!(msr & FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX) &&
+	    (msr & FEAT_CTL_VMX_ENABLED_INSIDE_SMX) &&
+	    !tboot_enabled()) {
+		pr_warn("kvm: disable TXT in the BIOS or "
+			"activate TXT before enabling KVM\n");
+		return 1;
 	}
+	/* launched w/o TXT and VMX disabled */
+	if (!(msr & FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX) &&
+	    !tboot_enabled())
+		return 1;
 
 	return 0;
 }
@@ -2241,7 +2243,6 @@ static int hardware_enable(void)
 {
 	int cpu = raw_smp_processor_id();
 	u64 phys_addr = __pa(per_cpu(vmxarea, cpu));
-	u64 old, test_bits;
 
 	if (cr4_read_shadow() & X86_CR4_VMXE)
 		return -EBUSY;
@@ -2269,17 +2270,6 @@ static int hardware_enable(void)
 	 */
 	crash_enable_local_vmclear(cpu);
 
-	rdmsrl(MSR_IA32_FEAT_CTL, old);
-
-	test_bits = FEAT_CTL_LOCKED;
-	test_bits |= FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX;
-	if (tboot_enabled())
-		test_bits |= FEAT_CTL_VMX_ENABLED_INSIDE_SMX;
-
-	if ((old & test_bits) != test_bits) {
-		/* enable and lock */
-		wrmsrl(MSR_IA32_FEAT_CTL, old | test_bits);
-	}
 	kvm_cpu_vmxon(phys_addr);
 	if (enable_ept)
 		ept_sync_global();
-- 
2.24.0


^ permalink raw reply	[flat|nested] 23+ messages in thread

* [PATCH v4 15/19] KVM: VMX: Use VMX feature flag to query BIOS enabling
  2019-11-28  1:39 [PATCH v4 00/19] x86/cpu: Clean up handling of VMX features Sean Christopherson
                   ` (13 preceding siblings ...)
  2019-11-28  1:40 ` [PATCH v4 14/19] KVM: VMX: Drop initialization of IA32_FEAT_CTL MSR Sean Christopherson
@ 2019-11-28  1:40 ` Sean Christopherson
  2019-11-28  1:40 ` [PATCH v4 16/19] KVM: VMX: Check for full VMX support when verifying CPU compatibility Sean Christopherson
                   ` (3 subsequent siblings)
  18 siblings, 0 replies; 23+ messages in thread
From: Sean Christopherson @ 2019-11-28  1:40 UTC (permalink / raw)
  To: Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86
  Cc: H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan,
	linux-kernel, kvm, linux-edac, linux-pm, linux-kselftest,
	Borislav Petkov, Jarkko Sakkinen

Replace KVM's manual checks on IA32_FEAT_CTL with a query on the boot
CPU's MSR_IA32_FEAT_CTL and VMX feature flags.  The MSR_IA32_FEAT_CTL
indicates that IA32_FEAT_CTL has been configured and that dependent
features are accurately reflected in cpufeatures, e.g. the VMX flag is
now cleared during boot if VMX isn't fully enabled via IA32_FEAT_CTL,
including the case where the MSR isn't supported.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/kvm/vmx/vmx.c | 27 ++-------------------------
 1 file changed, 2 insertions(+), 25 deletions(-)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 50dd8026e718..6020f04fe1a8 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -2204,31 +2204,8 @@ static __init int cpu_has_kvm_support(void)
 
 static __init int vmx_disabled_by_bios(void)
 {
-	u64 msr;
-
-	rdmsrl(MSR_IA32_FEAT_CTL, msr);
-
-	if (unlikely(!(msr & FEAT_CTL_LOCKED)))
-		return 1;
-
-	/* launched w/ TXT and VMX disabled */
-	if (!(msr & FEAT_CTL_VMX_ENABLED_INSIDE_SMX) &&
-	    tboot_enabled())
-		return 1;
-	/* launched w/o TXT and VMX only enabled w/ TXT */
-	if (!(msr & FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX) &&
-	    (msr & FEAT_CTL_VMX_ENABLED_INSIDE_SMX) &&
-	    !tboot_enabled()) {
-		pr_warn("kvm: disable TXT in the BIOS or "
-			"activate TXT before enabling KVM\n");
-		return 1;
-	}
-	/* launched w/o TXT and VMX disabled */
-	if (!(msr & FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX) &&
-	    !tboot_enabled())
-		return 1;
-
-	return 0;
+	return !boot_cpu_has(X86_FEATURE_MSR_IA32_FEAT_CTL) ||
+	       !boot_cpu_has(X86_FEATURE_VMX);
 }
 
 static void kvm_cpu_vmxon(u64 addr)
-- 
2.24.0


^ permalink raw reply	[flat|nested] 23+ messages in thread

* [PATCH v4 16/19] KVM: VMX: Check for full VMX support when verifying CPU compatibility
  2019-11-28  1:39 [PATCH v4 00/19] x86/cpu: Clean up handling of VMX features Sean Christopherson
                   ` (14 preceding siblings ...)
  2019-11-28  1:40 ` [PATCH v4 15/19] KVM: VMX: Use VMX feature flag to query BIOS enabling Sean Christopherson
@ 2019-11-28  1:40 ` Sean Christopherson
  2019-11-28  1:40 ` [PATCH v4 17/19] KVM: VMX: Use VMX_FEATURE_* flags to define VMCS control bits Sean Christopherson
                   ` (2 subsequent siblings)
  18 siblings, 0 replies; 23+ messages in thread
From: Sean Christopherson @ 2019-11-28  1:40 UTC (permalink / raw)
  To: Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86
  Cc: H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan,
	linux-kernel, kvm, linux-edac, linux-pm, linux-kselftest,
	Borislav Petkov, Jarkko Sakkinen

Explicitly check the current CPU's IA32_FEAT_CTL and VMX feature flags
when verifying compatibility across physical CPUs.  This effectively
adds a check on IA32_FEAT_CTL to ensure that VMX is fully enabled on
all CPUs.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/kvm/vmx/vmx.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 6020f04fe1a8..38d17c78e19d 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -6846,6 +6846,12 @@ static int __init vmx_check_processor_compat(void)
 	struct vmcs_config vmcs_conf;
 	struct vmx_capability vmx_cap;
 
+	if (!this_cpu_has(X86_FEATURE_MSR_IA32_FEAT_CTL) ||
+	    !this_cpu_has(X86_FEATURE_VMX)) {
+		pr_err("kvm: VMX is disabled on CPU %d\n", smp_processor_id());
+		return -EIO;
+	}
+
 	if (setup_vmcs_config(&vmcs_conf, &vmx_cap) < 0)
 		return -EIO;
 	if (nested)
-- 
2.24.0


^ permalink raw reply	[flat|nested] 23+ messages in thread

* [PATCH v4 17/19] KVM: VMX: Use VMX_FEATURE_* flags to define VMCS control bits
  2019-11-28  1:39 [PATCH v4 00/19] x86/cpu: Clean up handling of VMX features Sean Christopherson
                   ` (15 preceding siblings ...)
  2019-11-28  1:40 ` [PATCH v4 16/19] KVM: VMX: Check for full VMX support when verifying CPU compatibility Sean Christopherson
@ 2019-11-28  1:40 ` Sean Christopherson
  2019-11-28  1:40 ` [PATCH v4 18/19] perf/x86: Provide stubs of KVM helpers for non-Intel CPUs Sean Christopherson
  2019-11-28  1:40 ` [PATCH v4 19/19] KVM: VMX: Allow KVM_INTEL when building for Centaur and/or Zhaoxin CPUs Sean Christopherson
  18 siblings, 0 replies; 23+ messages in thread
From: Sean Christopherson @ 2019-11-28  1:40 UTC (permalink / raw)
  To: Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86
  Cc: H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan,
	linux-kernel, kvm, linux-edac, linux-pm, linux-kselftest,
	Borislav Petkov, Jarkko Sakkinen

Define the VMCS execution control flags (consumed by KVM) using their
associated VMX_FEATURE_* to provide a strong hint that new VMX features
are expected to be added to VMX_FEATURE and considered for reporting via
/proc/cpuinfo.

No functional change intended.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/include/asm/vmx.h | 105 +++++++++++++++++++------------------
 1 file changed, 55 insertions(+), 50 deletions(-)

diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h
index 1835767aa335..9fbba31be825 100644
--- a/arch/x86/include/asm/vmx.h
+++ b/arch/x86/include/asm/vmx.h
@@ -15,67 +15,70 @@
 #include <linux/bitops.h>
 #include <linux/types.h>
 #include <uapi/asm/vmx.h>
+#include <asm/vmxfeatures.h>
+
+#define VMCS_CONTROL_BIT(x)	BIT(VMX_FEATURE_##x & 0x1f)
 
 /*
  * Definitions of Primary Processor-Based VM-Execution Controls.
  */
-#define CPU_BASED_VIRTUAL_INTR_PENDING          0x00000004
-#define CPU_BASED_USE_TSC_OFFSETING             0x00000008
-#define CPU_BASED_HLT_EXITING                   0x00000080
-#define CPU_BASED_INVLPG_EXITING                0x00000200
-#define CPU_BASED_MWAIT_EXITING                 0x00000400
-#define CPU_BASED_RDPMC_EXITING                 0x00000800
-#define CPU_BASED_RDTSC_EXITING                 0x00001000
-#define CPU_BASED_CR3_LOAD_EXITING		0x00008000
-#define CPU_BASED_CR3_STORE_EXITING		0x00010000
-#define CPU_BASED_CR8_LOAD_EXITING              0x00080000
-#define CPU_BASED_CR8_STORE_EXITING             0x00100000
-#define CPU_BASED_TPR_SHADOW                    0x00200000
-#define CPU_BASED_VIRTUAL_NMI_PENDING		0x00400000
-#define CPU_BASED_MOV_DR_EXITING                0x00800000
-#define CPU_BASED_UNCOND_IO_EXITING             0x01000000
-#define CPU_BASED_USE_IO_BITMAPS                0x02000000
-#define CPU_BASED_MONITOR_TRAP_FLAG             0x08000000
-#define CPU_BASED_USE_MSR_BITMAPS               0x10000000
-#define CPU_BASED_MONITOR_EXITING               0x20000000
-#define CPU_BASED_PAUSE_EXITING                 0x40000000
-#define CPU_BASED_ACTIVATE_SECONDARY_CONTROLS   0x80000000
+#define CPU_BASED_VIRTUAL_INTR_PENDING          VMCS_CONTROL_BIT(VIRTUAL_INTR_PENDING)
+#define CPU_BASED_USE_TSC_OFFSETING             VMCS_CONTROL_BIT(TSC_OFFSETTING)
+#define CPU_BASED_HLT_EXITING                   VMCS_CONTROL_BIT(HLT_EXITING)
+#define CPU_BASED_INVLPG_EXITING                VMCS_CONTROL_BIT(INVLPG_EXITING)
+#define CPU_BASED_MWAIT_EXITING                 VMCS_CONTROL_BIT(MWAIT_EXITING)
+#define CPU_BASED_RDPMC_EXITING                 VMCS_CONTROL_BIT(RDPMC_EXITING)
+#define CPU_BASED_RDTSC_EXITING                 VMCS_CONTROL_BIT(RDTSC_EXITING)
+#define CPU_BASED_CR3_LOAD_EXITING		VMCS_CONTROL_BIT(CR3_LOAD_EXITING)
+#define CPU_BASED_CR3_STORE_EXITING		VMCS_CONTROL_BIT(CR3_STORE_EXITING)
+#define CPU_BASED_CR8_LOAD_EXITING              VMCS_CONTROL_BIT(CR8_LOAD_EXITING)
+#define CPU_BASED_CR8_STORE_EXITING             VMCS_CONTROL_BIT(CR8_STORE_EXITING)
+#define CPU_BASED_TPR_SHADOW                    VMCS_CONTROL_BIT(VIRTUAL_TPR)
+#define CPU_BASED_VIRTUAL_NMI_PENDING		VMCS_CONTROL_BIT(VIRTUAL_NMI_PENDING)
+#define CPU_BASED_MOV_DR_EXITING                VMCS_CONTROL_BIT(MOV_DR_EXITING)
+#define CPU_BASED_UNCOND_IO_EXITING             VMCS_CONTROL_BIT(UNCOND_IO_EXITING)
+#define CPU_BASED_USE_IO_BITMAPS                VMCS_CONTROL_BIT(USE_IO_BITMAPS)
+#define CPU_BASED_MONITOR_TRAP_FLAG             VMCS_CONTROL_BIT(MONITOR_TRAP_FLAG)
+#define CPU_BASED_USE_MSR_BITMAPS               VMCS_CONTROL_BIT(USE_MSR_BITMAPS)
+#define CPU_BASED_MONITOR_EXITING               VMCS_CONTROL_BIT(MONITOR_EXITING)
+#define CPU_BASED_PAUSE_EXITING                 VMCS_CONTROL_BIT(PAUSE_EXITING)
+#define CPU_BASED_ACTIVATE_SECONDARY_CONTROLS   VMCS_CONTROL_BIT(SEC_CONTROLS)
 
 #define CPU_BASED_ALWAYSON_WITHOUT_TRUE_MSR	0x0401e172
 
 /*
  * Definitions of Secondary Processor-Based VM-Execution Controls.
  */
-#define SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES 0x00000001
-#define SECONDARY_EXEC_ENABLE_EPT               0x00000002
-#define SECONDARY_EXEC_DESC			0x00000004
-#define SECONDARY_EXEC_RDTSCP			0x00000008
-#define SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE   0x00000010
-#define SECONDARY_EXEC_ENABLE_VPID              0x00000020
-#define SECONDARY_EXEC_WBINVD_EXITING		0x00000040
-#define SECONDARY_EXEC_UNRESTRICTED_GUEST	0x00000080
-#define SECONDARY_EXEC_APIC_REGISTER_VIRT       0x00000100
-#define SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY    0x00000200
-#define SECONDARY_EXEC_PAUSE_LOOP_EXITING	0x00000400
-#define SECONDARY_EXEC_RDRAND_EXITING		0x00000800
-#define SECONDARY_EXEC_ENABLE_INVPCID		0x00001000
-#define SECONDARY_EXEC_ENABLE_VMFUNC            0x00002000
-#define SECONDARY_EXEC_SHADOW_VMCS              0x00004000
-#define SECONDARY_EXEC_ENCLS_EXITING		0x00008000
-#define SECONDARY_EXEC_RDSEED_EXITING		0x00010000
-#define SECONDARY_EXEC_ENABLE_PML               0x00020000
-#define SECONDARY_EXEC_PT_CONCEAL_VMX		0x00080000
-#define SECONDARY_EXEC_XSAVES			0x00100000
-#define SECONDARY_EXEC_PT_USE_GPA		0x01000000
-#define SECONDARY_EXEC_MODE_BASED_EPT_EXEC	0x00400000
-#define SECONDARY_EXEC_TSC_SCALING              0x02000000
+#define SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES VMCS_CONTROL_BIT(VIRT_APIC_ACCESSES)
+#define SECONDARY_EXEC_ENABLE_EPT               VMCS_CONTROL_BIT(EPT)
+#define SECONDARY_EXEC_DESC			VMCS_CONTROL_BIT(DESC_EXITING)
+#define SECONDARY_EXEC_RDTSCP			VMCS_CONTROL_BIT(RDTSCP)
+#define SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE   VMCS_CONTROL_BIT(VIRTUAL_X2APIC)
+#define SECONDARY_EXEC_ENABLE_VPID              VMCS_CONTROL_BIT(VPID)
+#define SECONDARY_EXEC_WBINVD_EXITING		VMCS_CONTROL_BIT(WBINVD_EXITING)
+#define SECONDARY_EXEC_UNRESTRICTED_GUEST	VMCS_CONTROL_BIT(UNRESTRICTED_GUEST)
+#define SECONDARY_EXEC_APIC_REGISTER_VIRT       VMCS_CONTROL_BIT(APIC_REGISTER_VIRT)
+#define SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY    VMCS_CONTROL_BIT(VIRT_INTR_DELIVERY)
+#define SECONDARY_EXEC_PAUSE_LOOP_EXITING	VMCS_CONTROL_BIT(PAUSE_LOOP_EXITING)
+#define SECONDARY_EXEC_RDRAND_EXITING		VMCS_CONTROL_BIT(RDRAND_EXITING)
+#define SECONDARY_EXEC_ENABLE_INVPCID		VMCS_CONTROL_BIT(INVPCID)
+#define SECONDARY_EXEC_ENABLE_VMFUNC            VMCS_CONTROL_BIT(VMFUNC)
+#define SECONDARY_EXEC_SHADOW_VMCS              VMCS_CONTROL_BIT(SHADOW_VMCS)
+#define SECONDARY_EXEC_ENCLS_EXITING		VMCS_CONTROL_BIT(ENCLS_EXITING)
+#define SECONDARY_EXEC_RDSEED_EXITING		VMCS_CONTROL_BIT(RDSEED_EXITING)
+#define SECONDARY_EXEC_ENABLE_PML               VMCS_CONTROL_BIT(PAGE_MOD_LOGGING)
+#define SECONDARY_EXEC_PT_CONCEAL_VMX		VMCS_CONTROL_BIT(PT_CONCEAL_VMX)
+#define SECONDARY_EXEC_XSAVES			VMCS_CONTROL_BIT(XSAVES)
+#define SECONDARY_EXEC_MODE_BASED_EPT_EXEC	VMCS_CONTROL_BIT(MODE_BASED_EPT_EXEC)
+#define SECONDARY_EXEC_PT_USE_GPA		VMCS_CONTROL_BIT(PT_USE_GPA)
+#define SECONDARY_EXEC_TSC_SCALING              VMCS_CONTROL_BIT(TSC_SCALING)
 #define SECONDARY_EXEC_ENABLE_USR_WAIT_PAUSE	0x04000000
 
-#define PIN_BASED_EXT_INTR_MASK                 0x00000001
-#define PIN_BASED_NMI_EXITING                   0x00000008
-#define PIN_BASED_VIRTUAL_NMIS                  0x00000020
-#define PIN_BASED_VMX_PREEMPTION_TIMER          0x00000040
-#define PIN_BASED_POSTED_INTR                   0x00000080
+#define PIN_BASED_EXT_INTR_MASK                 VMCS_CONTROL_BIT(INTR_EXITING)
+#define PIN_BASED_NMI_EXITING                   VMCS_CONTROL_BIT(NMI_EXITING)
+#define PIN_BASED_VIRTUAL_NMIS                  VMCS_CONTROL_BIT(VIRTUAL_NMIS)
+#define PIN_BASED_VMX_PREEMPTION_TIMER          VMCS_CONTROL_BIT(PREEMPTION_TIMER)
+#define PIN_BASED_POSTED_INTR                   VMCS_CONTROL_BIT(POSTED_INTR)
 
 #define PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR	0x00000016
 
@@ -114,7 +117,9 @@
 #define VMX_MISC_MSR_LIST_MULTIPLIER		512
 
 /* VMFUNC functions */
-#define VMX_VMFUNC_EPTP_SWITCHING               0x00000001
+#define VMFUNC_CONTROL_BIT(x)	BIT((VMX_FEATURE_##x & 0x1f) - 28)
+
+#define VMX_VMFUNC_EPTP_SWITCHING               VMFUNC_CONTROL_BIT(EPTP_SWITCHING)
 #define VMFUNC_EPTP_ENTRIES  512
 
 static inline u32 vmx_basic_vmcs_revision_id(u64 vmx_basic)
-- 
2.24.0


^ permalink raw reply	[flat|nested] 23+ messages in thread

* [PATCH v4 18/19] perf/x86: Provide stubs of KVM helpers for non-Intel CPUs
  2019-11-28  1:39 [PATCH v4 00/19] x86/cpu: Clean up handling of VMX features Sean Christopherson
                   ` (16 preceding siblings ...)
  2019-11-28  1:40 ` [PATCH v4 17/19] KVM: VMX: Use VMX_FEATURE_* flags to define VMCS control bits Sean Christopherson
@ 2019-11-28  1:40 ` Sean Christopherson
  2019-11-28  1:40 ` [PATCH v4 19/19] KVM: VMX: Allow KVM_INTEL when building for Centaur and/or Zhaoxin CPUs Sean Christopherson
  18 siblings, 0 replies; 23+ messages in thread
From: Sean Christopherson @ 2019-11-28  1:40 UTC (permalink / raw)
  To: Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86
  Cc: H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan,
	linux-kernel, kvm, linux-edac, linux-pm, linux-kselftest,
	Borislav Petkov, Jarkko Sakkinen

Provide stubs for perf_guest_get_msrs() and intel_pt_handle_vmx() when
building without support for Intel CPUs, i.e. CPU_SUP_INTEL=n.  Lack of
stubs is not currently a problem as the only user, KVM_INTEL, takes a
dependency on CPU_SUP_INTEL=y.  Provide the stubs for all CPUs so that
KVM_INTEL can be built for any CPU with compatible hardware support,
e.g. Centuar and Zhaoxin CPUs.

Note, the existing stub for perf_guest_get_msrs() is essentially dead
code as KVM selects CONFIG_PERF_EVENTS, i.e. the only user guarantees
the full implementation is built.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/include/asm/perf_event.h | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h
index ee26e9215f18..29964b0e1075 100644
--- a/arch/x86/include/asm/perf_event.h
+++ b/arch/x86/include/asm/perf_event.h
@@ -322,17 +322,10 @@ struct perf_guest_switch_msr {
 	u64 host, guest;
 };
 
-extern struct perf_guest_switch_msr *perf_guest_get_msrs(int *nr);
 extern void perf_get_x86_pmu_capability(struct x86_pmu_capability *cap);
 extern void perf_check_microcode(void);
 extern int x86_perf_rdpmc_index(struct perf_event *event);
 #else
-static inline struct perf_guest_switch_msr *perf_guest_get_msrs(int *nr)
-{
-	*nr = 0;
-	return NULL;
-}
-
 static inline void perf_get_x86_pmu_capability(struct x86_pmu_capability *cap)
 {
 	memset(cap, 0, sizeof(*cap));
@@ -342,8 +335,23 @@ static inline void perf_events_lapic_init(void)	{ }
 static inline void perf_check_microcode(void) { }
 #endif
 
+#if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_CPU_SUP_INTEL)
+extern struct perf_guest_switch_msr *perf_guest_get_msrs(int *nr);
+#else
+static inline struct perf_guest_switch_msr *perf_guest_get_msrs(int *nr)
+{
+	*nr = 0;
+	return NULL;
+}
+#endif
+
 #ifdef CONFIG_CPU_SUP_INTEL
  extern void intel_pt_handle_vmx(int on);
+#else
+static inline void intel_pt_handle_vmx(int on)
+{
+
+}
 #endif
 
 #if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_CPU_SUP_AMD)
-- 
2.24.0


^ permalink raw reply	[flat|nested] 23+ messages in thread

* [PATCH v4 19/19] KVM: VMX: Allow KVM_INTEL when building for Centaur and/or Zhaoxin CPUs
  2019-11-28  1:39 [PATCH v4 00/19] x86/cpu: Clean up handling of VMX features Sean Christopherson
                   ` (17 preceding siblings ...)
  2019-11-28  1:40 ` [PATCH v4 18/19] perf/x86: Provide stubs of KVM helpers for non-Intel CPUs Sean Christopherson
@ 2019-11-28  1:40 ` Sean Christopherson
  18 siblings, 0 replies; 23+ messages in thread
From: Sean Christopherson @ 2019-11-28  1:40 UTC (permalink / raw)
  To: Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86
  Cc: H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan,
	linux-kernel, kvm, linux-edac, linux-pm, linux-kselftest,
	Borislav Petkov, Jarkko Sakkinen

Change the dependency for KVM_INTEL, i.e. KVM w/ VMX, from Intel CPUs to
any CPU that supports the IA32_FEAT_CTL MSR and thus VMX functionality.
This effectively allows building KVM_INTEL for Centaur and Zhaoxin CPUs.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/kvm/Kconfig | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
index 840e12583b85..991019d5eee1 100644
--- a/arch/x86/kvm/Kconfig
+++ b/arch/x86/kvm/Kconfig
@@ -60,13 +60,11 @@ config KVM
 	  If unsure, say N.
 
 config KVM_INTEL
-	tristate "KVM for Intel processors support"
-	depends on KVM
-	# for perf_guest_get_msrs():
-	depends on CPU_SUP_INTEL
+	tristate "KVM for Intel (and compatible) processors support"
+	depends on KVM && IA32_FEAT_CTL
 	---help---
-	  Provides support for KVM on Intel processors equipped with the VT
-	  extensions.
+	  Provides support for KVM on processors equipped with Intel's VT
+	  extensions, a.k.a. Virtual Machine Extensions (VMX).
 
 	  To compile this as a module, choose M here: the module
 	  will be called kvm-intel.
-- 
2.24.0


^ permalink raw reply	[flat|nested] 23+ messages in thread

* Re: [PATCH v4 01/19] x86/msr-index: Clean up bit defines for IA32_FEATURE_CONTROL MSR
  2019-11-28  1:39 ` [PATCH v4 01/19] x86/msr-index: Clean up bit defines for IA32_FEATURE_CONTROL MSR Sean Christopherson
@ 2019-11-28 21:07   ` kbuild test robot
  2019-11-30 20:52   ` kbuild test robot
  1 sibling, 0 replies; 23+ messages in thread
From: kbuild test robot @ 2019-11-28 21:07 UTC (permalink / raw)
  To: Sean Christopherson
  Cc: kbuild-all, Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86,
	H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan,
	linux-kernel, kvm, linux-edac, linux-pm, linux-kselftest,
	Borislav Petkov, Jarkko Sakkinen

[-- Attachment #1: Type: text/plain, Size: 10221 bytes --]

Hi Sean,

I love your patch! Yet something to improve:

[auto build test ERROR on tip/auto-latest]
[also build test ERROR on next-20191128]
[cannot apply to tip/x86/core kvm/linux-next v5.4]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Sean-Christopherson/x86-cpu-Clean-up-handling-of-VMX-features/20191128-094556
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git e445033e58108a9891abfbc0dea90b066a75e4a9
config: i386-randconfig-a002-20191128 (attached as .config)
compiler: gcc-6 (Debian 6.3.0-18+deb9u1) 6.3.0 20170516
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   In file included from arch/x86/include/asm/processor.h:22:0,
                    from arch/x86/include/asm/cpufeature.h:5,
                    from arch/x86/include/asm/thread_info.h:53,
                    from include/linux/thread_info.h:38,
                    from arch/x86/include/asm/preempt.h:7,
                    from include/linux/preempt.h:78,
                    from include/linux/percpu.h:6,
                    from include/linux/cpuidle.h:14,
                    from drivers//idle/intel_idle.c:45:
   drivers//idle/intel_idle.c: In function 'sklh_idle_state_table_update':
>> drivers//idle/intel_idle.c:1287:10: error: 'MSR_IA32_FEATURE_CONTROL' undeclared (first use in this function)
      rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
             ^
   arch/x86/include/asm/msr.h:279:28: note: in definition of macro 'rdmsrl'
     ((val) = native_read_msr((msr)))
                               ^~~
   drivers//idle/intel_idle.c:1287:10: note: each undeclared identifier is reported only once for each function it appears in
      rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
             ^
   arch/x86/include/asm/msr.h:279:28: note: in definition of macro 'rdmsrl'
     ((val) = native_read_msr((msr)))
                               ^~~

vim +/MSR_IA32_FEATURE_CONTROL +1287 drivers//idle/intel_idle.c

5dcef694860100 Len Brown   2016-04-06  1189  
5dcef694860100 Len Brown   2016-04-06  1190  /*
5dcef694860100 Len Brown   2016-04-06  1191   * Translate IRTL (Interrupt Response Time Limit) MSR to usec
5dcef694860100 Len Brown   2016-04-06  1192   */
5dcef694860100 Len Brown   2016-04-06  1193  
5dcef694860100 Len Brown   2016-04-06  1194  static unsigned int irtl_ns_units[] = {
5dcef694860100 Len Brown   2016-04-06  1195  	1, 32, 1024, 32768, 1048576, 33554432, 0, 0 };
5dcef694860100 Len Brown   2016-04-06  1196  
5dcef694860100 Len Brown   2016-04-06  1197  static unsigned long long irtl_2_usec(unsigned long long irtl)
5dcef694860100 Len Brown   2016-04-06  1198  {
5dcef694860100 Len Brown   2016-04-06  1199  	unsigned long long ns;
5dcef694860100 Len Brown   2016-04-06  1200  
3451ab3ebf92b1 Jan Beulich 2016-06-27  1201  	if (!irtl)
3451ab3ebf92b1 Jan Beulich 2016-06-27  1202  		return 0;
3451ab3ebf92b1 Jan Beulich 2016-06-27  1203  
bef450962597ff Jan Beulich 2016-06-27  1204  	ns = irtl_ns_units[(irtl >> 10) & 0x7];
5dcef694860100 Len Brown   2016-04-06  1205  
5dcef694860100 Len Brown   2016-04-06  1206  	return div64_u64((irtl & 0x3FF) * ns, 1000);
5dcef694860100 Len Brown   2016-04-06  1207  }
5dcef694860100 Len Brown   2016-04-06  1208  /*
5dcef694860100 Len Brown   2016-04-06  1209   * bxt_idle_state_table_update(void)
5dcef694860100 Len Brown   2016-04-06  1210   *
5dcef694860100 Len Brown   2016-04-06  1211   * On BXT, we trust the IRTL to show the definitive maximum latency
5dcef694860100 Len Brown   2016-04-06  1212   * We use the same value for target_residency.
5dcef694860100 Len Brown   2016-04-06  1213   */
5dcef694860100 Len Brown   2016-04-06  1214  static void bxt_idle_state_table_update(void)
5dcef694860100 Len Brown   2016-04-06  1215  {
5dcef694860100 Len Brown   2016-04-06  1216  	unsigned long long msr;
3451ab3ebf92b1 Jan Beulich 2016-06-27  1217  	unsigned int usec;
5dcef694860100 Len Brown   2016-04-06  1218  
5dcef694860100 Len Brown   2016-04-06  1219  	rdmsrl(MSR_PKGC6_IRTL, msr);
3451ab3ebf92b1 Jan Beulich 2016-06-27  1220  	usec = irtl_2_usec(msr);
3451ab3ebf92b1 Jan Beulich 2016-06-27  1221  	if (usec) {
5dcef694860100 Len Brown   2016-04-06  1222  		bxt_cstates[2].exit_latency = usec;
5dcef694860100 Len Brown   2016-04-06  1223  		bxt_cstates[2].target_residency = usec;
5dcef694860100 Len Brown   2016-04-06  1224  	}
5dcef694860100 Len Brown   2016-04-06  1225  
5dcef694860100 Len Brown   2016-04-06  1226  	rdmsrl(MSR_PKGC7_IRTL, msr);
3451ab3ebf92b1 Jan Beulich 2016-06-27  1227  	usec = irtl_2_usec(msr);
3451ab3ebf92b1 Jan Beulich 2016-06-27  1228  	if (usec) {
5dcef694860100 Len Brown   2016-04-06  1229  		bxt_cstates[3].exit_latency = usec;
5dcef694860100 Len Brown   2016-04-06  1230  		bxt_cstates[3].target_residency = usec;
5dcef694860100 Len Brown   2016-04-06  1231  	}
5dcef694860100 Len Brown   2016-04-06  1232  
5dcef694860100 Len Brown   2016-04-06  1233  	rdmsrl(MSR_PKGC8_IRTL, msr);
3451ab3ebf92b1 Jan Beulich 2016-06-27  1234  	usec = irtl_2_usec(msr);
3451ab3ebf92b1 Jan Beulich 2016-06-27  1235  	if (usec) {
5dcef694860100 Len Brown   2016-04-06  1236  		bxt_cstates[4].exit_latency = usec;
5dcef694860100 Len Brown   2016-04-06  1237  		bxt_cstates[4].target_residency = usec;
5dcef694860100 Len Brown   2016-04-06  1238  	}
5dcef694860100 Len Brown   2016-04-06  1239  
5dcef694860100 Len Brown   2016-04-06  1240  	rdmsrl(MSR_PKGC9_IRTL, msr);
3451ab3ebf92b1 Jan Beulich 2016-06-27  1241  	usec = irtl_2_usec(msr);
3451ab3ebf92b1 Jan Beulich 2016-06-27  1242  	if (usec) {
5dcef694860100 Len Brown   2016-04-06  1243  		bxt_cstates[5].exit_latency = usec;
5dcef694860100 Len Brown   2016-04-06  1244  		bxt_cstates[5].target_residency = usec;
5dcef694860100 Len Brown   2016-04-06  1245  	}
5dcef694860100 Len Brown   2016-04-06  1246  
5dcef694860100 Len Brown   2016-04-06  1247  	rdmsrl(MSR_PKGC10_IRTL, msr);
3451ab3ebf92b1 Jan Beulich 2016-06-27  1248  	usec = irtl_2_usec(msr);
3451ab3ebf92b1 Jan Beulich 2016-06-27  1249  	if (usec) {
5dcef694860100 Len Brown   2016-04-06  1250  		bxt_cstates[6].exit_latency = usec;
5dcef694860100 Len Brown   2016-04-06  1251  		bxt_cstates[6].target_residency = usec;
5dcef694860100 Len Brown   2016-04-06  1252  	}
5dcef694860100 Len Brown   2016-04-06  1253  
5dcef694860100 Len Brown   2016-04-06  1254  }
d70e28f57e14a4 Len Brown   2016-03-13  1255  /*
d70e28f57e14a4 Len Brown   2016-03-13  1256   * sklh_idle_state_table_update(void)
d70e28f57e14a4 Len Brown   2016-03-13  1257   *
d70e28f57e14a4 Len Brown   2016-03-13  1258   * On SKL-H (model 0x5e) disable C8 and C9 if:
d70e28f57e14a4 Len Brown   2016-03-13  1259   * C10 is enabled and SGX disabled
d70e28f57e14a4 Len Brown   2016-03-13  1260   */
d70e28f57e14a4 Len Brown   2016-03-13  1261  static void sklh_idle_state_table_update(void)
d70e28f57e14a4 Len Brown   2016-03-13  1262  {
d70e28f57e14a4 Len Brown   2016-03-13  1263  	unsigned long long msr;
d70e28f57e14a4 Len Brown   2016-03-13  1264  	unsigned int eax, ebx, ecx, edx;
d70e28f57e14a4 Len Brown   2016-03-13  1265  
d70e28f57e14a4 Len Brown   2016-03-13  1266  
d70e28f57e14a4 Len Brown   2016-03-13  1267  	/* if PC10 disabled via cmdline intel_idle.max_cstate=7 or shallower */
d70e28f57e14a4 Len Brown   2016-03-13  1268  	if (max_cstate <= 7)
d70e28f57e14a4 Len Brown   2016-03-13  1269  		return;
d70e28f57e14a4 Len Brown   2016-03-13  1270  
d70e28f57e14a4 Len Brown   2016-03-13  1271  	/* if PC10 not present in CPUID.MWAIT.EDX */
d70e28f57e14a4 Len Brown   2016-03-13  1272  	if ((mwait_substates & (0xF << 28)) == 0)
d70e28f57e14a4 Len Brown   2016-03-13  1273  		return;
d70e28f57e14a4 Len Brown   2016-03-13  1274  
6cfb2374f83bc7 Len Brown   2017-01-07  1275  	rdmsrl(MSR_PKG_CST_CONFIG_CONTROL, msr);
d70e28f57e14a4 Len Brown   2016-03-13  1276  
d70e28f57e14a4 Len Brown   2016-03-13  1277  	/* PC10 is not enabled in PKG C-state limit */
d70e28f57e14a4 Len Brown   2016-03-13  1278  	if ((msr & 0xF) != 8)
d70e28f57e14a4 Len Brown   2016-03-13  1279  		return;
d70e28f57e14a4 Len Brown   2016-03-13  1280  
d70e28f57e14a4 Len Brown   2016-03-13  1281  	ecx = 0;
d70e28f57e14a4 Len Brown   2016-03-13  1282  	cpuid(7, &eax, &ebx, &ecx, &edx);
d70e28f57e14a4 Len Brown   2016-03-13  1283  
d70e28f57e14a4 Len Brown   2016-03-13  1284  	/* if SGX is present */
d70e28f57e14a4 Len Brown   2016-03-13  1285  	if (ebx & (1 << 2)) {
d70e28f57e14a4 Len Brown   2016-03-13  1286  
d70e28f57e14a4 Len Brown   2016-03-13 @1287  		rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
d70e28f57e14a4 Len Brown   2016-03-13  1288  
d70e28f57e14a4 Len Brown   2016-03-13  1289  		/* if SGX is enabled */
d70e28f57e14a4 Len Brown   2016-03-13  1290  		if (msr & (1 << 18))
0138d8f0755b5b Len Brown   2014-04-04  1291  			return;
0138d8f0755b5b Len Brown   2014-04-04  1292  	}
0138d8f0755b5b Len Brown   2014-04-04  1293  
d70e28f57e14a4 Len Brown   2016-03-13  1294  	skl_cstates[5].disabled = 1;	/* C8-SKL */
d70e28f57e14a4 Len Brown   2016-03-13  1295  	skl_cstates[6].disabled = 1;	/* C9-SKL */
d70e28f57e14a4 Len Brown   2016-03-13  1296  }
d70e28f57e14a4 Len Brown   2016-03-13  1297  /*
d70e28f57e14a4 Len Brown   2016-03-13  1298   * intel_idle_state_table_update()
d70e28f57e14a4 Len Brown   2016-03-13  1299   *
d70e28f57e14a4 Len Brown   2016-03-13  1300   * Update the default state_table for this CPU-id
d70e28f57e14a4 Len Brown   2016-03-13  1301   */
d70e28f57e14a4 Len Brown   2016-03-13  1302  

:::::: The code at line 1287 was first introduced by commit
:::::: d70e28f57e14a481977436695b0c9ba165472431 intel_idle: prevent SKL-H boot failure when C8+C9+C10 enabled

:::::: TO: Len Brown <len.brown@intel.com>
:::::: CC: Len Brown <len.brown@intel.com>

---
0-DAY kernel test infrastructure                 Open Source Technology Center
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 36801 bytes --]

^ permalink raw reply	[flat|nested] 23+ messages in thread

* Re: [PATCH v4 01/19] x86/msr-index: Clean up bit defines for IA32_FEATURE_CONTROL MSR
  2019-11-28  1:39 ` [PATCH v4 01/19] x86/msr-index: Clean up bit defines for IA32_FEATURE_CONTROL MSR Sean Christopherson
  2019-11-28 21:07   ` kbuild test robot
@ 2019-11-30 20:52   ` kbuild test robot
  2019-12-02 19:06     ` Sean Christopherson
  1 sibling, 1 reply; 23+ messages in thread
From: kbuild test robot @ 2019-11-30 20:52 UTC (permalink / raw)
  To: Sean Christopherson
  Cc: kbuild-all, Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86,
	H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan,
	linux-kernel, kvm, linux-edac, linux-pm, linux-kselftest,
	Borislav Petkov, Jarkko Sakkinen

[-- Attachment #1: Type: text/plain, Size: 10217 bytes --]

Hi Sean,

I love your patch! Yet something to improve:

[auto build test ERROR on tip/auto-latest]
[also build test ERROR on next-20191129]
[cannot apply to tip/x86/core kvm/linux-next v5.4]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Sean-Christopherson/x86-cpu-Clean-up-handling-of-VMX-features/20191128-094556
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git e445033e58108a9891abfbc0dea90b066a75e4a9
config: x86_64-randconfig-s0-20191128 (attached as .config)
compiler: gcc-7 (Debian 7.4.0-14) 7.4.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   In file included from arch/x86/include/asm/processor.h:22:0,
                    from arch/x86/include/asm/cpufeature.h:5,
                    from arch/x86/include/asm/thread_info.h:53,
                    from include/linux/thread_info.h:38,
                    from arch/x86/include/asm/preempt.h:7,
                    from include/linux/preempt.h:78,
                    from include/linux/percpu.h:6,
                    from include/linux/cpuidle.h:14,
                    from drivers/idle/intel_idle.c:45:
   drivers/idle/intel_idle.c: In function 'sklh_idle_state_table_update':
>> drivers/idle/intel_idle.c:1287:10: error: 'MSR_IA32_FEATURE_CONTROL' undeclared (first use in this function); did you mean 'MSR_MISC_FEATURE_CONTROL'?
      rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
             ^
   arch/x86/include/asm/msr.h:279:28: note: in definition of macro 'rdmsrl'
     ((val) = native_read_msr((msr)))
                               ^~~
   drivers/idle/intel_idle.c:1287:10: note: each undeclared identifier is reported only once for each function it appears in
      rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
             ^
   arch/x86/include/asm/msr.h:279:28: note: in definition of macro 'rdmsrl'
     ((val) = native_read_msr((msr)))
                               ^~~

vim +1287 drivers/idle/intel_idle.c

5dcef694860100 Len Brown   2016-04-06  1189  
5dcef694860100 Len Brown   2016-04-06  1190  /*
5dcef694860100 Len Brown   2016-04-06  1191   * Translate IRTL (Interrupt Response Time Limit) MSR to usec
5dcef694860100 Len Brown   2016-04-06  1192   */
5dcef694860100 Len Brown   2016-04-06  1193  
5dcef694860100 Len Brown   2016-04-06  1194  static unsigned int irtl_ns_units[] = {
5dcef694860100 Len Brown   2016-04-06  1195  	1, 32, 1024, 32768, 1048576, 33554432, 0, 0 };
5dcef694860100 Len Brown   2016-04-06  1196  
5dcef694860100 Len Brown   2016-04-06  1197  static unsigned long long irtl_2_usec(unsigned long long irtl)
5dcef694860100 Len Brown   2016-04-06  1198  {
5dcef694860100 Len Brown   2016-04-06  1199  	unsigned long long ns;
5dcef694860100 Len Brown   2016-04-06  1200  
3451ab3ebf92b1 Jan Beulich 2016-06-27  1201  	if (!irtl)
3451ab3ebf92b1 Jan Beulich 2016-06-27  1202  		return 0;
3451ab3ebf92b1 Jan Beulich 2016-06-27  1203  
bef450962597ff Jan Beulich 2016-06-27  1204  	ns = irtl_ns_units[(irtl >> 10) & 0x7];
5dcef694860100 Len Brown   2016-04-06  1205  
5dcef694860100 Len Brown   2016-04-06  1206  	return div64_u64((irtl & 0x3FF) * ns, 1000);
5dcef694860100 Len Brown   2016-04-06  1207  }
5dcef694860100 Len Brown   2016-04-06  1208  /*
5dcef694860100 Len Brown   2016-04-06  1209   * bxt_idle_state_table_update(void)
5dcef694860100 Len Brown   2016-04-06  1210   *
5dcef694860100 Len Brown   2016-04-06  1211   * On BXT, we trust the IRTL to show the definitive maximum latency
5dcef694860100 Len Brown   2016-04-06  1212   * We use the same value for target_residency.
5dcef694860100 Len Brown   2016-04-06  1213   */
5dcef694860100 Len Brown   2016-04-06  1214  static void bxt_idle_state_table_update(void)
5dcef694860100 Len Brown   2016-04-06  1215  {
5dcef694860100 Len Brown   2016-04-06  1216  	unsigned long long msr;
3451ab3ebf92b1 Jan Beulich 2016-06-27  1217  	unsigned int usec;
5dcef694860100 Len Brown   2016-04-06  1218  
5dcef694860100 Len Brown   2016-04-06  1219  	rdmsrl(MSR_PKGC6_IRTL, msr);
3451ab3ebf92b1 Jan Beulich 2016-06-27  1220  	usec = irtl_2_usec(msr);
3451ab3ebf92b1 Jan Beulich 2016-06-27  1221  	if (usec) {
5dcef694860100 Len Brown   2016-04-06  1222  		bxt_cstates[2].exit_latency = usec;
5dcef694860100 Len Brown   2016-04-06  1223  		bxt_cstates[2].target_residency = usec;
5dcef694860100 Len Brown   2016-04-06  1224  	}
5dcef694860100 Len Brown   2016-04-06  1225  
5dcef694860100 Len Brown   2016-04-06  1226  	rdmsrl(MSR_PKGC7_IRTL, msr);
3451ab3ebf92b1 Jan Beulich 2016-06-27  1227  	usec = irtl_2_usec(msr);
3451ab3ebf92b1 Jan Beulich 2016-06-27  1228  	if (usec) {
5dcef694860100 Len Brown   2016-04-06  1229  		bxt_cstates[3].exit_latency = usec;
5dcef694860100 Len Brown   2016-04-06  1230  		bxt_cstates[3].target_residency = usec;
5dcef694860100 Len Brown   2016-04-06  1231  	}
5dcef694860100 Len Brown   2016-04-06  1232  
5dcef694860100 Len Brown   2016-04-06  1233  	rdmsrl(MSR_PKGC8_IRTL, msr);
3451ab3ebf92b1 Jan Beulich 2016-06-27  1234  	usec = irtl_2_usec(msr);
3451ab3ebf92b1 Jan Beulich 2016-06-27  1235  	if (usec) {
5dcef694860100 Len Brown   2016-04-06  1236  		bxt_cstates[4].exit_latency = usec;
5dcef694860100 Len Brown   2016-04-06  1237  		bxt_cstates[4].target_residency = usec;
5dcef694860100 Len Brown   2016-04-06  1238  	}
5dcef694860100 Len Brown   2016-04-06  1239  
5dcef694860100 Len Brown   2016-04-06  1240  	rdmsrl(MSR_PKGC9_IRTL, msr);
3451ab3ebf92b1 Jan Beulich 2016-06-27  1241  	usec = irtl_2_usec(msr);
3451ab3ebf92b1 Jan Beulich 2016-06-27  1242  	if (usec) {
5dcef694860100 Len Brown   2016-04-06  1243  		bxt_cstates[5].exit_latency = usec;
5dcef694860100 Len Brown   2016-04-06  1244  		bxt_cstates[5].target_residency = usec;
5dcef694860100 Len Brown   2016-04-06  1245  	}
5dcef694860100 Len Brown   2016-04-06  1246  
5dcef694860100 Len Brown   2016-04-06  1247  	rdmsrl(MSR_PKGC10_IRTL, msr);
3451ab3ebf92b1 Jan Beulich 2016-06-27  1248  	usec = irtl_2_usec(msr);
3451ab3ebf92b1 Jan Beulich 2016-06-27  1249  	if (usec) {
5dcef694860100 Len Brown   2016-04-06  1250  		bxt_cstates[6].exit_latency = usec;
5dcef694860100 Len Brown   2016-04-06  1251  		bxt_cstates[6].target_residency = usec;
5dcef694860100 Len Brown   2016-04-06  1252  	}
5dcef694860100 Len Brown   2016-04-06  1253  
5dcef694860100 Len Brown   2016-04-06  1254  }
d70e28f57e14a4 Len Brown   2016-03-13  1255  /*
d70e28f57e14a4 Len Brown   2016-03-13  1256   * sklh_idle_state_table_update(void)
d70e28f57e14a4 Len Brown   2016-03-13  1257   *
d70e28f57e14a4 Len Brown   2016-03-13  1258   * On SKL-H (model 0x5e) disable C8 and C9 if:
d70e28f57e14a4 Len Brown   2016-03-13  1259   * C10 is enabled and SGX disabled
d70e28f57e14a4 Len Brown   2016-03-13  1260   */
d70e28f57e14a4 Len Brown   2016-03-13  1261  static void sklh_idle_state_table_update(void)
d70e28f57e14a4 Len Brown   2016-03-13  1262  {
d70e28f57e14a4 Len Brown   2016-03-13  1263  	unsigned long long msr;
d70e28f57e14a4 Len Brown   2016-03-13  1264  	unsigned int eax, ebx, ecx, edx;
d70e28f57e14a4 Len Brown   2016-03-13  1265  
d70e28f57e14a4 Len Brown   2016-03-13  1266  
d70e28f57e14a4 Len Brown   2016-03-13  1267  	/* if PC10 disabled via cmdline intel_idle.max_cstate=7 or shallower */
d70e28f57e14a4 Len Brown   2016-03-13  1268  	if (max_cstate <= 7)
d70e28f57e14a4 Len Brown   2016-03-13  1269  		return;
d70e28f57e14a4 Len Brown   2016-03-13  1270  
d70e28f57e14a4 Len Brown   2016-03-13  1271  	/* if PC10 not present in CPUID.MWAIT.EDX */
d70e28f57e14a4 Len Brown   2016-03-13  1272  	if ((mwait_substates & (0xF << 28)) == 0)
d70e28f57e14a4 Len Brown   2016-03-13  1273  		return;
d70e28f57e14a4 Len Brown   2016-03-13  1274  
6cfb2374f83bc7 Len Brown   2017-01-07  1275  	rdmsrl(MSR_PKG_CST_CONFIG_CONTROL, msr);
d70e28f57e14a4 Len Brown   2016-03-13  1276  
d70e28f57e14a4 Len Brown   2016-03-13  1277  	/* PC10 is not enabled in PKG C-state limit */
d70e28f57e14a4 Len Brown   2016-03-13  1278  	if ((msr & 0xF) != 8)
d70e28f57e14a4 Len Brown   2016-03-13  1279  		return;
d70e28f57e14a4 Len Brown   2016-03-13  1280  
d70e28f57e14a4 Len Brown   2016-03-13  1281  	ecx = 0;
d70e28f57e14a4 Len Brown   2016-03-13  1282  	cpuid(7, &eax, &ebx, &ecx, &edx);
d70e28f57e14a4 Len Brown   2016-03-13  1283  
d70e28f57e14a4 Len Brown   2016-03-13  1284  	/* if SGX is present */
d70e28f57e14a4 Len Brown   2016-03-13  1285  	if (ebx & (1 << 2)) {
d70e28f57e14a4 Len Brown   2016-03-13  1286  
d70e28f57e14a4 Len Brown   2016-03-13 @1287  		rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
d70e28f57e14a4 Len Brown   2016-03-13  1288  
d70e28f57e14a4 Len Brown   2016-03-13  1289  		/* if SGX is enabled */
d70e28f57e14a4 Len Brown   2016-03-13  1290  		if (msr & (1 << 18))
0138d8f0755b5b Len Brown   2014-04-04  1291  			return;
0138d8f0755b5b Len Brown   2014-04-04  1292  	}
0138d8f0755b5b Len Brown   2014-04-04  1293  
d70e28f57e14a4 Len Brown   2016-03-13  1294  	skl_cstates[5].disabled = 1;	/* C8-SKL */
d70e28f57e14a4 Len Brown   2016-03-13  1295  	skl_cstates[6].disabled = 1;	/* C9-SKL */
d70e28f57e14a4 Len Brown   2016-03-13  1296  }
d70e28f57e14a4 Len Brown   2016-03-13  1297  /*
d70e28f57e14a4 Len Brown   2016-03-13  1298   * intel_idle_state_table_update()
d70e28f57e14a4 Len Brown   2016-03-13  1299   *
d70e28f57e14a4 Len Brown   2016-03-13  1300   * Update the default state_table for this CPU-id
d70e28f57e14a4 Len Brown   2016-03-13  1301   */
d70e28f57e14a4 Len Brown   2016-03-13  1302  

:::::: The code at line 1287 was first introduced by commit
:::::: d70e28f57e14a481977436695b0c9ba165472431 intel_idle: prevent SKL-H boot failure when C8+C9+C10 enabled

:::::: TO: Len Brown <len.brown@intel.com>
:::::: CC: Len Brown <len.brown@intel.com>

---
0-DAY kernel test infrastructure                 Open Source Technology Center
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 35544 bytes --]

^ permalink raw reply	[flat|nested] 23+ messages in thread

* Re: [PATCH v4 01/19] x86/msr-index: Clean up bit defines for IA32_FEATURE_CONTROL MSR
  2019-11-30 20:52   ` kbuild test robot
@ 2019-12-02 19:06     ` Sean Christopherson
  0 siblings, 0 replies; 23+ messages in thread
From: Sean Christopherson @ 2019-12-02 19:06 UTC (permalink / raw)
  To: kbuild test robot
  Cc: kbuild-all, Thomas Gleixner, Ingo Molnar, Borislav Petkov, x86,
	H. Peter Anvin, Peter Zijlstra, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Paolo Bonzini, Radim Krčmář,
	Vitaly Kuznetsov, Wanpeng Li, Jim Mattson, Joerg Roedel,
	Tony Luck, Tony W Wang-oc, Len Brown, Shuah Khan, linux-kernel,
	kvm, linux-edac, linux-pm, linux-kselftest, Borislav Petkov,
	Jarkko Sakkinen

On Sun, Dec 01, 2019 at 04:52:53AM +0800, kbuild test robot wrote:
> Hi Sean,
> 
> I love your patch! Yet something to improve:
> 
> [auto build test ERROR on tip/auto-latest]
> [also build test ERROR on next-20191129]
> [cannot apply to tip/x86/core kvm/linux-next v5.4]
> [if your patch is applied to the wrong git tree, please drop us a note to help
> improve the system. BTW, we also suggest to use '--base' option to specify the
> base tree in git format-patch, please see https://stackoverflow.com/a/37406982]
> 
> url:    https://github.com/0day-ci/linux/commits/Sean-Christopherson/x86-cpu-Clean-up-handling-of-VMX-features/20191128-094556
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git e445033e58108a9891abfbc0dea90b066a75e4a9
> config: x86_64-randconfig-s0-20191128 (attached as .config)
> compiler: gcc-7 (Debian 7.4.0-14) 7.4.0
> reproduce:
>         # save the attached .config to linux build tree
>         make ARCH=x86_64 
> 
> If you fix the issue, kindly add following tag
> Reported-by: kbuild test robot <lkp@intel.com>
> 
> All errors (new ones prefixed by >>):
> 
>    In file included from arch/x86/include/asm/processor.h:22:0,
>                     from arch/x86/include/asm/cpufeature.h:5,
>                     from arch/x86/include/asm/thread_info.h:53,
>                     from include/linux/thread_info.h:38,
>                     from arch/x86/include/asm/preempt.h:7,
>                     from include/linux/preempt.h:78,
>                     from include/linux/percpu.h:6,
>                     from include/linux/cpuidle.h:14,
>                     from drivers/idle/intel_idle.c:45:
>    drivers/idle/intel_idle.c: In function 'sklh_idle_state_table_update':
> >> drivers/idle/intel_idle.c:1287:10: error: 'MSR_IA32_FEATURE_CONTROL' undeclared (first use in this function); did you mean 'MSR_MISC_FEATURE_CONTROL'?
>       rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
>              ^

Argh, flat out missed this when doing search and replace.

>    arch/x86/include/asm/msr.h:279:28: note: in definition of macro 'rdmsrl'
>      ((val) = native_read_msr((msr)))
>                                ^~~
>    drivers/idle/intel_idle.c:1287:10: note: each undeclared identifier is reported only once for each function it appears in
>       rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
>              ^
>    arch/x86/include/asm/msr.h:279:28: note: in definition of macro 'rdmsrl'
>      ((val) = native_read_msr((msr)))
>                                ^~~
> 
> vim +1287 drivers/idle/intel_idle.c

^ permalink raw reply	[flat|nested] 23+ messages in thread

end of thread, back to index

Thread overview: 23+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-11-28  1:39 [PATCH v4 00/19] x86/cpu: Clean up handling of VMX features Sean Christopherson
2019-11-28  1:39 ` [PATCH v4 01/19] x86/msr-index: Clean up bit defines for IA32_FEATURE_CONTROL MSR Sean Christopherson
2019-11-28 21:07   ` kbuild test robot
2019-11-30 20:52   ` kbuild test robot
2019-12-02 19:06     ` Sean Christopherson
2019-11-28  1:39 ` [PATCH v4 02/19] selftests: kvm: Replace manual MSR defs with common msr-index.h Sean Christopherson
2019-11-28  1:40 ` [PATCH v4 03/19] tools arch x86: Sync msr-index.h from kernel sources Sean Christopherson
2019-11-28  1:40 ` [PATCH v4 04/19] x86/intel: Initialize IA32_FEAT_CTL MSR at boot Sean Christopherson
2019-11-28  1:40 ` [PATCH v4 05/19] x86/mce: WARN once if IA32_FEAT_CTL MSR is left unlocked Sean Christopherson
2019-11-28  1:40 ` [PATCH v4 06/19] x86/centaur: Use common IA32_FEAT_CTL MSR initialization Sean Christopherson
2019-11-28  1:40 ` [PATCH v4 07/19] x86/zhaoxin: " Sean Christopherson
2019-11-28  1:40 ` [PATCH v4 08/19] x86/cpu: Clear VMX feature flag if VMX is not fully enabled Sean Christopherson
2019-11-28  1:40 ` [PATCH v4 09/19] x86/vmx: Introduce VMX_FEATURES_* Sean Christopherson
2019-11-28  1:40 ` [PATCH v4 10/19] x86/cpu: Detect VMX features on Intel, Centaur and Zhaoxin CPUs Sean Christopherson
2019-11-28  1:40 ` [PATCH v4 11/19] x86/cpu: Print VMX flags in /proc/cpuinfo using VMX_FEATURES_* Sean Christopherson
2019-11-28  1:40 ` [PATCH v4 12/19] x86/cpu: Set synthetic VMX cpufeatures during init_ia32_feat_ctl() Sean Christopherson
2019-11-28  1:40 ` [PATCH v4 13/19] x86/cpufeatures: Add flag to track whether MSR IA32_FEAT_CTL is configured Sean Christopherson
2019-11-28  1:40 ` [PATCH v4 14/19] KVM: VMX: Drop initialization of IA32_FEAT_CTL MSR Sean Christopherson
2019-11-28  1:40 ` [PATCH v4 15/19] KVM: VMX: Use VMX feature flag to query BIOS enabling Sean Christopherson
2019-11-28  1:40 ` [PATCH v4 16/19] KVM: VMX: Check for full VMX support when verifying CPU compatibility Sean Christopherson
2019-11-28  1:40 ` [PATCH v4 17/19] KVM: VMX: Use VMX_FEATURE_* flags to define VMCS control bits Sean Christopherson
2019-11-28  1:40 ` [PATCH v4 18/19] perf/x86: Provide stubs of KVM helpers for non-Intel CPUs Sean Christopherson
2019-11-28  1:40 ` [PATCH v4 19/19] KVM: VMX: Allow KVM_INTEL when building for Centaur and/or Zhaoxin CPUs Sean Christopherson

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