README: Document x2apic compatibility

jovanbulck · Sep 17, 2024 · 4884538 · 4884538
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diff --git a/README.md b/README.md
@@ -129,7 +129,7 @@ below.
 
 | Linux kernel parameter               | Motivation                                                                                                                                                                     |
 | ------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
-| `nox2apic`                           | Configure local APIC device in memory-mapped I/O mode (to make use of SGX-Step's precise single-stepping features).                                                            |
+| `nox2apic`                           | Optionally configure local APIC device in memory-mapped I/O mode (to make use of SGX-Step's precise single-stepping features). Alternatively, you can leave the CPU in x2APIC mode and recent SGX-Step distributions should also be compatible.                                                            |
 | `iomem=relaxed no_timer_check`       | Suppress unneeded warning messages in the kernel logs.                                                                                                                         |
 | `nmi_watchdog=0`                     | Suppress the kernel NMI watchdog.                                                                                                                                              |
 | `isolcpus=1`                         | Affinitize the victim process to an isolated CPU core.                                                                                                                         |

diff --git a/check_sys.sh b/check_sys.sh
@@ -68,7 +68,7 @@ cpuinfo=`cat /proc/cpuinfo`
 assert_not_contains "$cpuinfo" "smap"   "not disabled in /proc/cpuinfo"
 assert_not_contains "$cpuinfo" "smep"   "not disabled in /proc/cpuinfo"
 assert_not_contains "$cpuinfo" "umip"   "not disabled in /proc/cpuinfo"
-assert_not_contains "$cpuinfo" "x2apic" "not disabled in /proc/cpuinfo"
+#assert_not_contains "$cpuinfo" "x2apic" "not disabled in /proc/cpuinfo"
 end_check
 
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