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From a66b7c34e1f618194d288d1b1982af805d5be57f Mon Sep 17 00:00:00 2001
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From: Dave Hansen <dave.hansen@linux.intel.com>
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Date: Tue, 22 Apr 2025 08:32:47 +0200
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Subject: x86/cpu: Help users notice when running old Intel microcode
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Old microcode is bad for users and for kernel developers.
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For users, it exposes them to known fixed security and/or functional
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issues. These obviously rarely result in instant dumpster fires in
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every environment. But it is as important to keep your microcode up
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to date as it is to keep your kernel up to date.
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Old microcode also makes kernels harder to debug. A developer looking
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at an oops need to consider kernel bugs, known CPU issues and unknown
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CPU issues as possible causes. If they know the microcode is up to
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date, they can mostly eliminate known CPU issues as the cause.
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Make it easier to tell if CPU microcode is out of date. Add a list
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of released microcode. If the loaded microcode is older than the
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release, tell users in a place that folks can find it:
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/sys/devices/system/cpu/vulnerabilities/old_microcode
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Tell kernel kernel developers about it with the existing taint
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flag:
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TAINT_CPU_OUT_OF_SPEC
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== Discussion ==
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When a user reports a potential kernel issue, it is very common
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to ask them to reproduce the issue on mainline. Running mainline,
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they will (independently from the distro) acquire a more up-to-date
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microcode version list. If their microcode is old, they will
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get a warning about the taint and kernel developers can take that
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into consideration when debugging.
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Just like any other entry in "vulnerabilities/", users are free to
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make their own assessment of their exposure.
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== Microcode Revision Discussion ==
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The microcode versions in the table were generated from the Intel
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microcode git repo:
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8ac9378a8487 ("microcode-20241112 Release")
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which as of this writing lags behind the latest microcode-20250211.
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It can be argued that the versions that the kernel picks to call "old"
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should be a revision or two old. Which specific version is picked is
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less important to me than picking *a* version and enforcing it.
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This repository contains only microcode versions that Intel has deemed
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to be OS-loadable. It is quite possible that the BIOS has loaded a
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newer microcode than the latest in this repo. If this happens, the
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system is considered to have new microcode, not old.
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Specifically, the sysfs file and taint flag answer the question:
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Is the CPU running on the latest OS-loadable microcode,
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or something even later that the BIOS loaded?
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In other words, Intel never publishes an authoritative list of CPUs
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and latest microcode revisions. Until it does, this is the best that
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Linux can do.
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Also note that the "intel-ucode-defs.h" file is simple, ugly and
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has lots of magic numbers. That's on purpose and should allow a
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single file to be shared across lots of stable kernel regardless of if
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they have the new "VFM" infrastructure or not. It was generated with
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a dumb script.
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== FAQ ==
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Q: Does this tell me if my system is secure or insecure?
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A: No. It only tells you if your microcode was old when the
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system booted.
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Q: Should the kernel warn if the microcode list itself is too old?
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A: No. New kernels will get new microcode lists, both mainline
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and stable. The only way to have an old list is to be running
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an old kernel in which case you have bigger problems.
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Q: Is this for security or functional issues?
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A: Both.
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Q: If a given microcode update only has functional problems but
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no security issues, will it be considered old?
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A: Yes. All microcode image versions within a microcode release
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are treated identically. Intel appears to make security
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updates without disclosing them in the release notes. Thus,
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all updates are considered to be security-relevant.
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Q: Who runs old microcode?
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A: Anybody with an old distro. This happens all the time inside
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of Intel where there are lots of weird systems in labs that
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might not be getting regular distro updates and might also
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be running rather exotic microcode images.
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Q: If I update my microcode after booting will it stop saying
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"Vulnerable"?
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A: No. Just like all the other vulnerabilies, you need to
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reboot before the kernel will reassess your vulnerability.
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Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
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Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Cc: "Ahmed S. Darwish" <darwi@linutronix.de>
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Cc: Andrew Cooper <andrew.cooper3@citrix.com>
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Cc: Andy Lutomirski <luto@kernel.org>
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Cc: Brian Gerst <brgerst@gmail.com>
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Cc: John Ogness <john.ogness@linutronix.de>
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Cc: Josh Poimboeuf <jpoimboe@redhat.com>
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Cc: Juergen Gross <jgross@suse.com>
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Cc: H. Peter Anvin <hpa@zytor.com>
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Cc: Kees Cook <keescook@chromium.org>
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Cc: Linus Torvalds <torvalds@linux-foundation.org>
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Link: https://lore.kernel.org/all/20250421195659.CF426C07%40davehans-spike.ostc.intel.com
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---
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.../ABI/testing/sysfs-devices-system-cpu | 1 +
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Documentation/admin-guide/hw-vuln/index.rst | 1 +
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.../admin-guide/hw-vuln/old_microcode.rst | 21 +++
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arch/x86/include/asm/cpufeatures.h | 6 +-
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arch/x86/kernel/cpu/bugs.c | 16 ++
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arch/x86/kernel/cpu/common.c | 42 +++++
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.../kernel/cpu/microcode/intel-ucode-defs.h | 150 ++++++++++++++++++
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drivers/base/cpu.c | 3 +
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include/linux/cpu.h | 2 +
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9 files changed, 240 insertions(+), 2 deletions(-)
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create mode 100644 Documentation/admin-guide/hw-vuln/old_microcode.rst
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create mode 100644 arch/x86/kernel/cpu/microcode/intel-ucode-defs.h
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--- a/Documentation/ABI/testing/sysfs-devices-system-cpu
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+++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
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@@ -517,6 +517,7 @@ What: /sys/devices/system/cpu/vulnerabi
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/sys/devices/system/cpu/vulnerabilities/mds
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/sys/devices/system/cpu/vulnerabilities/meltdown
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/sys/devices/system/cpu/vulnerabilities/mmio_stale_data
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+ /sys/devices/system/cpu/vulnerabilities/old_microcode
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/sys/devices/system/cpu/vulnerabilities/reg_file_data_sampling
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/sys/devices/system/cpu/vulnerabilities/retbleed
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/sys/devices/system/cpu/vulnerabilities/spec_store_bypass
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--- a/Documentation/admin-guide/hw-vuln/index.rst
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+++ b/Documentation/admin-guide/hw-vuln/index.rst
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@@ -23,4 +23,5 @@ are configurable at compile, boot or run
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gather_data_sampling
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reg-file-data-sampling
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rsb
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+ old_microcode
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indirect-target-selection
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--- /dev/null
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+++ b/Documentation/admin-guide/hw-vuln/old_microcode.rst
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@@ -0,0 +1,21 @@
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+.. SPDX-License-Identifier: GPL-2.0
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+
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+=============
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+Old Microcode
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+=============
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+
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+The kernel keeps a table of released microcode. Systems that had
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+microcode older than this at boot will say "Vulnerable". This means
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+that the system was vulnerable to some known CPU issue. It could be
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+security or functional, the kernel does not know or care.
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+
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+You should update the CPU microcode to mitigate any exposure. This is
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+usually accomplished by updating the files in
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+/lib/firmware/intel-ucode/ via normal distribution updates. Intel also
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+distributes these files in a github repo:
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+
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+ https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files.git
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+
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+Just like all the other hardware vulnerabilities, exposure is
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+determined at boot. Runtime microcode updates do not change the status
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+of this vulnerability.
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--- a/arch/x86/include/asm/cpufeatures.h
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+++ b/arch/x86/include/asm/cpufeatures.h
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@@ -534,6 +534,8 @@
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#define X86_BUG_BHI X86_BUG(1*32 + 3) /* "bhi" CPU is affected by Branch History Injection */
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#define X86_BUG_IBPB_NO_RET X86_BUG(1*32 + 4) /* "ibpb_no_ret" IBPB omits return target predictions */
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#define X86_BUG_SPECTRE_V2_USER X86_BUG(1*32 + 5) /* "spectre_v2_user" CPU is affected by Spectre variant 2 attack between user processes */
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-#define X86_BUG_ITS X86_BUG(1*32 + 6) /* "its" CPU is affected by Indirect Target Selection */
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-#define X86_BUG_ITS_NATIVE_ONLY X86_BUG(1*32 + 7) /* "its_native_only" CPU is affected by ITS, VMX is not affected */
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+#define X86_BUG_OLD_MICROCODE X86_BUG(1*32 + 6) /* "old_microcode" CPU has old microcode, it is surely vulnerable to something */
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+#define X86_BUG_ITS X86_BUG(1*32 + 7) /* "its" CPU is affected by Indirect Target Selection */
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+#define X86_BUG_ITS_NATIVE_ONLY X86_BUG(1*32 + 8) /* "its_native_only" CPU is affected by ITS, VMX is not affected */
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+
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#endif /* _ASM_X86_CPUFEATURES_H */
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--- a/arch/x86/kernel/cpu/bugs.c
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+++ b/arch/x86/kernel/cpu/bugs.c
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@@ -2954,6 +2954,14 @@ static ssize_t its_show_state(char *buf)
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return sysfs_emit(buf, "%s\n", its_strings[its_mitigation]);
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}
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+static ssize_t old_microcode_show_state(char *buf)
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+{
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+ if (boot_cpu_has(X86_FEATURE_HYPERVISOR))
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+ return sysfs_emit(buf, "Unknown: running under hypervisor");
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+
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+ return sysfs_emit(buf, "Vulnerable\n");
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+}
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+
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static char *stibp_state(void)
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{
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if (spectre_v2_in_eibrs_mode(spectre_v2_enabled) &&
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@@ -3136,6 +3144,9 @@ static ssize_t cpu_show_common(struct de
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case X86_BUG_RFDS:
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return rfds_show_state(buf);
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+ case X86_BUG_OLD_MICROCODE:
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+ return old_microcode_show_state(buf);
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+
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case X86_BUG_ITS:
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return its_show_state(buf);
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@@ -3219,6 +3230,11 @@ ssize_t cpu_show_reg_file_data_sampling(
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return cpu_show_common(dev, attr, buf, X86_BUG_RFDS);
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}
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+ssize_t cpu_show_old_microcode(struct device *dev, struct device_attribute *attr, char *buf)
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+{
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+ return cpu_show_common(dev, attr, buf, X86_BUG_OLD_MICROCODE);
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+}
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+
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ssize_t cpu_show_indirect_target_selection(struct device *dev, struct device_attribute *attr, char *buf)
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{
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return cpu_show_common(dev, attr, buf, X86_BUG_ITS);
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--- a/arch/x86/kernel/cpu/common.c
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+++ b/arch/x86/kernel/cpu/common.c
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@@ -1352,10 +1352,52 @@ static bool __init vulnerable_to_its(u64
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return false;
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}
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+static struct x86_cpu_id cpu_latest_microcode[] = {
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+#include "microcode/intel-ucode-defs.h"
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+ {}
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+};
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+
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+static bool __init cpu_has_old_microcode(void)
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+{
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+ const struct x86_cpu_id *m = x86_match_cpu(cpu_latest_microcode);
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+
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+ /* Give unknown CPUs a pass: */
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+ if (!m) {
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+ /* Intel CPUs should be in the list. Warn if not: */
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+ if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
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+ pr_info("x86/CPU: Model not found in latest microcode list\n");
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+ return false;
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+ }
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+
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+ /*
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+ * Hosts usually lie to guests with a super high microcode
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+ * version. Just ignore what hosts tell guests:
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+ */
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+ if (boot_cpu_has(X86_FEATURE_HYPERVISOR))
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+ return false;
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+
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+ /* Consider all debug microcode to be old: */
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+ if (boot_cpu_data.microcode & BIT(31))
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+ return true;
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+
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+ /* Give new microcode a pass: */
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+ if (boot_cpu_data.microcode >= m->driver_data)
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+ return false;
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+
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+ /* Uh oh, too old: */
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+ return true;
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+}
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+
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static void __init cpu_set_bug_bits(struct cpuinfo_x86 *c)
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{
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u64 x86_arch_cap_msr = x86_read_arch_cap_msr();
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+ if (cpu_has_old_microcode()) {
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+ pr_warn("x86/CPU: Running old microcode\n");
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+ setup_force_cpu_bug(X86_BUG_OLD_MICROCODE);
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+ add_taint(TAINT_CPU_OUT_OF_SPEC, LOCKDEP_STILL_OK);
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+ }
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+
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/* Set ITLB_MULTIHIT bug if cpu is not in the whitelist and not mitigated */
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if (!cpu_matches(cpu_vuln_whitelist, NO_ITLB_MULTIHIT) &&
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!(x86_arch_cap_msr & ARCH_CAP_PSCHANGE_MC_NO))
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--- /dev/null
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+++ b/arch/x86/kernel/cpu/microcode/intel-ucode-defs.h
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@@ -0,0 +1,150 @@
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x03, .steppings = 0x0004, .driver_data = 0x2 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x05, .steppings = 0x0001, .driver_data = 0x45 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x05, .steppings = 0x0002, .driver_data = 0x40 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x05, .steppings = 0x0004, .driver_data = 0x2c },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x05, .steppings = 0x0008, .driver_data = 0x10 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x06, .steppings = 0x0001, .driver_data = 0xa },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x06, .steppings = 0x0020, .driver_data = 0x3 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x06, .steppings = 0x0400, .driver_data = 0xd },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x06, .steppings = 0x2000, .driver_data = 0x7 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x07, .steppings = 0x0002, .driver_data = 0x14 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x07, .steppings = 0x0004, .driver_data = 0x38 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x07, .steppings = 0x0008, .driver_data = 0x2e },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x08, .steppings = 0x0002, .driver_data = 0x11 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x08, .steppings = 0x0008, .driver_data = 0x8 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x08, .steppings = 0x0040, .driver_data = 0xc },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x08, .steppings = 0x0400, .driver_data = 0x5 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x09, .steppings = 0x0020, .driver_data = 0x47 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x0a, .steppings = 0x0001, .driver_data = 0x3 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x0a, .steppings = 0x0002, .driver_data = 0x1 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x0b, .steppings = 0x0002, .driver_data = 0x1d },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x0b, .steppings = 0x0010, .driver_data = 0x2 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x0d, .steppings = 0x0040, .driver_data = 0x18 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x0e, .steppings = 0x0100, .driver_data = 0x39 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x0e, .steppings = 0x1000, .driver_data = 0x59 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x0f, .steppings = 0x0004, .driver_data = 0x5d },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x0f, .steppings = 0x0040, .driver_data = 0xd2 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x0f, .steppings = 0x0080, .driver_data = 0x6b },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x0f, .steppings = 0x0400, .driver_data = 0x95 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x0f, .steppings = 0x0800, .driver_data = 0xbc },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x0f, .steppings = 0x2000, .driver_data = 0xa4 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x16, .steppings = 0x0002, .driver_data = 0x44 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x17, .steppings = 0x0040, .driver_data = 0x60f },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x17, .steppings = 0x0080, .driver_data = 0x70a },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x17, .steppings = 0x0400, .driver_data = 0xa0b },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x1a, .steppings = 0x0010, .driver_data = 0x12 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x1a, .steppings = 0x0020, .driver_data = 0x1d },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x1c, .steppings = 0x0004, .driver_data = 0x219 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x1c, .steppings = 0x0400, .driver_data = 0x107 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x1d, .steppings = 0x0002, .driver_data = 0x29 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x1e, .steppings = 0x0020, .driver_data = 0xa },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x25, .steppings = 0x0004, .driver_data = 0x11 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x25, .steppings = 0x0020, .driver_data = 0x7 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x26, .steppings = 0x0002, .driver_data = 0x105 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x2a, .steppings = 0x0080, .driver_data = 0x2f },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x2c, .steppings = 0x0004, .driver_data = 0x1f },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x2d, .steppings = 0x0040, .driver_data = 0x621 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x2d, .steppings = 0x0080, .driver_data = 0x71a },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x2e, .steppings = 0x0040, .driver_data = 0xd },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x2f, .steppings = 0x0004, .driver_data = 0x3b },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x37, .steppings = 0x0100, .driver_data = 0x838 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x37, .steppings = 0x0200, .driver_data = 0x90d },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x3a, .steppings = 0x0200, .driver_data = 0x21 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x3c, .steppings = 0x0008, .driver_data = 0x28 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x3d, .steppings = 0x0010, .driver_data = 0x2f },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x3e, .steppings = 0x0010, .driver_data = 0x42e },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x3e, .steppings = 0x0040, .driver_data = 0x600 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x3e, .steppings = 0x0080, .driver_data = 0x715 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x3f, .steppings = 0x0004, .driver_data = 0x49 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x3f, .steppings = 0x0010, .driver_data = 0x1a },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x45, .steppings = 0x0002, .driver_data = 0x26 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x46, .steppings = 0x0002, .driver_data = 0x1c },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x47, .steppings = 0x0002, .driver_data = 0x22 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x4c, .steppings = 0x0008, .driver_data = 0x368 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x4c, .steppings = 0x0010, .driver_data = 0x411 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x4d, .steppings = 0x0100, .driver_data = 0x12d },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x4e, .steppings = 0x0008, .driver_data = 0xf0 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x55, .steppings = 0x0008, .driver_data = 0x1000191 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x55, .steppings = 0x0010, .driver_data = 0x2007006 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x55, .steppings = 0x0020, .driver_data = 0x3000010 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x55, .steppings = 0x0040, .driver_data = 0x4003605 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x55, .steppings = 0x0080, .driver_data = 0x5003707 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x55, .steppings = 0x0800, .driver_data = 0x7002904 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x56, .steppings = 0x0004, .driver_data = 0x1c },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x56, .steppings = 0x0008, .driver_data = 0x700001c },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x56, .steppings = 0x0010, .driver_data = 0xf00001a },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x56, .steppings = 0x0020, .driver_data = 0xe000015 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x5c, .steppings = 0x0004, .driver_data = 0x14 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x5c, .steppings = 0x0200, .driver_data = 0x48 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x5c, .steppings = 0x0400, .driver_data = 0x28 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x5e, .steppings = 0x0008, .driver_data = 0xf0 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x5f, .steppings = 0x0002, .driver_data = 0x3e },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x66, .steppings = 0x0008, .driver_data = 0x2a },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x6a, .steppings = 0x0020, .driver_data = 0xc0002f0 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x6a, .steppings = 0x0040, .driver_data = 0xd0003e7 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x6c, .steppings = 0x0002, .driver_data = 0x10002b0 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x7a, .steppings = 0x0002, .driver_data = 0x42 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x7a, .steppings = 0x0100, .driver_data = 0x24 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x7e, .steppings = 0x0020, .driver_data = 0xc6 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x8a, .steppings = 0x0002, .driver_data = 0x33 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x8c, .steppings = 0x0002, .driver_data = 0xb8 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x8c, .steppings = 0x0004, .driver_data = 0x38 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x8d, .steppings = 0x0002, .driver_data = 0x52 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x8e, .steppings = 0x0200, .driver_data = 0xf6 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x8e, .steppings = 0x0400, .driver_data = 0xf6 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x8e, .steppings = 0x0800, .driver_data = 0xf6 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x8e, .steppings = 0x1000, .driver_data = 0xfc },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x8f, .steppings = 0x0100, .driver_data = 0x2c000390 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x8f, .steppings = 0x0080, .driver_data = 0x2b000603 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x8f, .steppings = 0x0040, .driver_data = 0x2c000390 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x8f, .steppings = 0x0020, .driver_data = 0x2c000390 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x8f, .steppings = 0x0010, .driver_data = 0x2c000390 },
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+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x96, .steppings = 0x0002, .driver_data = 0x1a },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x97, .steppings = 0x0004, .driver_data = 0x37 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x97, .steppings = 0x0020, .driver_data = 0x37 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0xbf, .steppings = 0x0004, .driver_data = 0x37 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0xbf, .steppings = 0x0020, .driver_data = 0x37 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x9a, .steppings = 0x0008, .driver_data = 0x435 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x9a, .steppings = 0x0010, .driver_data = 0x435 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x9c, .steppings = 0x0001, .driver_data = 0x24000026 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x9e, .steppings = 0x0200, .driver_data = 0xf8 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x9e, .steppings = 0x0400, .driver_data = 0xf8 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x9e, .steppings = 0x0800, .driver_data = 0xf6 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x9e, .steppings = 0x1000, .driver_data = 0xf8 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0x9e, .steppings = 0x2000, .driver_data = 0x100 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0xa5, .steppings = 0x0004, .driver_data = 0xfc },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0xa5, .steppings = 0x0008, .driver_data = 0xfc },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0xa5, .steppings = 0x0020, .driver_data = 0xfc },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0xa6, .steppings = 0x0001, .driver_data = 0xfe },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0xa6, .steppings = 0x0002, .driver_data = 0xfc },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0xa7, .steppings = 0x0002, .driver_data = 0x62 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0xaa, .steppings = 0x0010, .driver_data = 0x20 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0xb7, .steppings = 0x0002, .driver_data = 0x12b },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0xba, .steppings = 0x0004, .driver_data = 0x4123 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0xba, .steppings = 0x0008, .driver_data = 0x4123 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0xba, .steppings = 0x0100, .driver_data = 0x4123 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0xbe, .steppings = 0x0001, .driver_data = 0x1a },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0xcf, .steppings = 0x0004, .driver_data = 0x21000283 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0x6, .model = 0xcf, .steppings = 0x0002, .driver_data = 0x21000283 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0xf, .model = 0x00, .steppings = 0x0080, .driver_data = 0x12 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0xf, .model = 0x00, .steppings = 0x0400, .driver_data = 0x15 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0xf, .model = 0x01, .steppings = 0x0004, .driver_data = 0x2e },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0xf, .model = 0x02, .steppings = 0x0010, .driver_data = 0x21 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0xf, .model = 0x02, .steppings = 0x0020, .driver_data = 0x2c },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0xf, .model = 0x02, .steppings = 0x0040, .driver_data = 0x10 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0xf, .model = 0x02, .steppings = 0x0080, .driver_data = 0x39 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0xf, .model = 0x02, .steppings = 0x0200, .driver_data = 0x2f },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0xf, .model = 0x03, .steppings = 0x0004, .driver_data = 0xa },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0xf, .model = 0x03, .steppings = 0x0008, .driver_data = 0xc },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0xf, .model = 0x03, .steppings = 0x0010, .driver_data = 0x17 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0xf, .model = 0x04, .steppings = 0x0002, .driver_data = 0x17 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0xf, .model = 0x04, .steppings = 0x0008, .driver_data = 0x5 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0xf, .model = 0x04, .steppings = 0x0010, .driver_data = 0x6 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0xf, .model = 0x04, .steppings = 0x0080, .driver_data = 0x3 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0xf, .model = 0x04, .steppings = 0x0100, .driver_data = 0xe },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0xf, .model = 0x04, .steppings = 0x0200, .driver_data = 0x3 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0xf, .model = 0x04, .steppings = 0x0400, .driver_data = 0x4 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0xf, .model = 0x06, .steppings = 0x0004, .driver_data = 0xf },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0xf, .model = 0x06, .steppings = 0x0010, .driver_data = 0x4 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0xf, .model = 0x06, .steppings = 0x0020, .driver_data = 0x8 },
|
|
|
|
|
+{ .flags = X86_CPU_ID_FLAG_ENTRY_VALID, .vendor = X86_VENDOR_INTEL, .family = 0xf, .model = 0x06, .steppings = 0x0100, .driver_data = 0x9 },
|
|
|
|
|
--- a/drivers/base/cpu.c
|
|
|
|
|
+++ b/drivers/base/cpu.c
|
|
|
|
|
@@ -600,6 +600,7 @@ CPU_SHOW_VULN_FALLBACK(spec_rstack_overf
|
|
|
|
|
CPU_SHOW_VULN_FALLBACK(gds);
|
|
|
|
|
CPU_SHOW_VULN_FALLBACK(reg_file_data_sampling);
|
|
|
|
|
CPU_SHOW_VULN_FALLBACK(ghostwrite);
|
|
|
|
|
+CPU_SHOW_VULN_FALLBACK(old_microcode);
|
|
|
|
|
CPU_SHOW_VULN_FALLBACK(indirect_target_selection);
|
|
|
|
|
|
|
|
|
|
static DEVICE_ATTR(meltdown, 0444, cpu_show_meltdown, NULL);
|
|
|
|
|
@@ -617,6 +618,7 @@ static DEVICE_ATTR(spec_rstack_overflow,
|
|
|
|
|
static DEVICE_ATTR(gather_data_sampling, 0444, cpu_show_gds, NULL);
|
|
|
|
|
static DEVICE_ATTR(reg_file_data_sampling, 0444, cpu_show_reg_file_data_sampling, NULL);
|
|
|
|
|
static DEVICE_ATTR(ghostwrite, 0444, cpu_show_ghostwrite, NULL);
|
|
|
|
|
+static DEVICE_ATTR(old_microcode, 0444, cpu_show_old_microcode, NULL);
|
|
|
|
|
static DEVICE_ATTR(indirect_target_selection, 0444, cpu_show_indirect_target_selection, NULL);
|
|
|
|
|
|
|
|
|
|
static struct attribute *cpu_root_vulnerabilities_attrs[] = {
|
|
|
|
|
@@ -635,6 +637,7 @@ static struct attribute *cpu_root_vulner
|
|
|
|
|
&dev_attr_gather_data_sampling.attr,
|
|
|
|
|
&dev_attr_reg_file_data_sampling.attr,
|
|
|
|
|
&dev_attr_ghostwrite.attr,
|
|
|
|
|
+ &dev_attr_old_microcode.attr,
|
|
|
|
|
&dev_attr_indirect_target_selection.attr,
|
|
|
|
|
NULL
|
|
|
|
|
};
|
|
|
|
|
--- a/include/linux/cpu.h
|
|
|
|
|
+++ b/include/linux/cpu.h
|
|
|
|
|
@@ -78,6 +78,8 @@ extern ssize_t cpu_show_gds(struct devic
|
|
|
|
|
extern ssize_t cpu_show_reg_file_data_sampling(struct device *dev,
|
|
|
|
|
struct device_attribute *attr, char *buf);
|
|
|
|
|
extern ssize_t cpu_show_ghostwrite(struct device *dev, struct device_attribute *attr, char *buf);
|
|
|
|
|
+extern ssize_t cpu_show_old_microcode(struct device *dev,
|
|
|
|
|
+ struct device_attribute *attr, char *buf);
|
|
|
|
|
extern ssize_t cpu_show_indirect_target_selection(struct device *dev,
|
|
|
|
|
struct device_attribute *attr, char *buf);
|
|
|
|
|
|
