Author: scottl
Date: Tue Nov 12 19:15:16 2019
New Revision: 354655
URL: https://svnweb.freebsd.org/changeset/base/354655
Log:
Add new bit definitions for TSX, related to the TAA issue. The actual
mitigation will follow in a future commit.
Sponsored by: Intel
Modified:
head/sys/x86/include/specialreg.h
head/sys/x86/x86/identcpu.c
Modified: head/sys/x86/include/specialreg.h
==============================================================================
--- head/sys/x86/include/specialreg.h Tue Nov 12 18:13:51 2019
(r354654)
+++ head/sys/x86/include/specialreg.h Tue Nov 12 19:15:16 2019
(r354655)
@@ -491,7 +491,13 @@
#define IA32_ARCH_CAP_SSB_NO 0x00000010
#define IA32_ARCH_CAP_MDS_NO 0x00000020
#define IA32_ARCH_CAP_IF_PSCHANGE_MC_NO 0x00000040
+#define IA32_ARCH_CAP_TSX_CTRL 0x00000080
+#define IA32_ARCH_CAP_TAA_NO 0x00000100
+/* MSR IA32_TSX_CTRL bits */
+#define IA32_TSX_CTRL_RTM_DISABLE 0x00000001
+#define IA32_TSX_CTRL_TSX_CPUID_CLEAR 0x00000002
+
/*
* CPUID manufacturers identifiers
*/
@@ -543,6 +549,7 @@
#define MSR_BBL_CR_TRIG 0x11a
#define MSR_BBL_CR_BUSY 0x11b
#define MSR_BBL_CR_CTL3 0x11e
+#define MSR_IA32_TSX_CTRL 0x122
#define MSR_SYSENTER_CS_MSR 0x174
#define MSR_SYSENTER_ESP_MSR 0x175
#define MSR_SYSENTER_EIP_MSR 0x176
Modified: head/sys/x86/x86/identcpu.c
==============================================================================
--- head/sys/x86/x86/identcpu.c Tue Nov 12 18:13:51 2019 (r354654)
+++ head/sys/x86/x86/identcpu.c Tue Nov 12 19:15:16 2019 (r354655)
@@ -1046,6 +1046,8 @@ printcpuinfo(void)
"\004SKIP_L1DFL_VME"
"\005SSB_NO"
"\006MDS_NO"
+ "\010TSX_CTRL"
+ "\011TAA_NO"
);
}
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