From: Yu-cheng Yu <yu-cheng.yu@intel.com>
To: x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
linux-mm@kvack.org, linux-arch@vger.kernel.org,
linux-api@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
Andy Lutomirski <luto@kernel.org>,
Balbir Singh <bsingharora@gmail.com>,
Borislav Petkov <bp@alien8.de>,
Cyrill Gorcunov <gorcunov@gmail.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Eugene Syromiatnikov <esyr@redhat.com>,
Florian Weimer <fweimer@redhat.com>,
"H.J. Lu" <hjl.tools@gmail.com>, Jann Horn <jannh@google.com>,
Jonathan Corbet <corbet@lwn.net>,
Kees Cook <keescook@chromium.org>,
Mike Kravetz <mike.kravetz@oracle.com>,
Nadav Amit <nadav.amit@gmail.com>,
Oleg Nesterov <oleg@redhat.com>, Pavel Machek <pavel@ucw.cz>,
Peter Zijlstra <peterz@infradead.org>,
Randy Dunlap <rdunlap@infradead.org>,
"Ravi V. Shankar" <ravi.v.shankar@intel.com>,
Vedvyas Shanbhogue <vedvyas.shanbhogue@intel.com>,
Dave Martin <Dave.Martin@arm.com>,
Weijiang Yang <weijiang.yang@intel.com>,
Pengfei Xu <pengfei.xu@intel.com>,
Haitao Huang <haitao.huang@intel.com>,
Rick P Edgecombe <rick.p.edgecombe@intel.com>
Cc: Yu-cheng Yu <yu-cheng.yu@intel.com>
Subject: [PATCH v28 03/32] x86/cpufeatures: Add CET CPU feature flags for Control-flow Enforcement Technology (CET)
Date: Thu, 22 Jul 2021 13:51:50 -0700 [thread overview]
Message-ID: <20210722205219.7934-4-yu-cheng.yu@intel.com> (raw)
In-Reply-To: <20210722205219.7934-1-yu-cheng.yu@intel.com>
Add CPU feature flags for Control-flow Enforcement Technology (CET).
CPUID.(EAX=7,ECX=0):ECX[bit 7] Shadow stack
CPUID.(EAX=7,ECX=0):EDX[bit 20] Indirect Branch Tracking
Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
Cc: Kees Cook <keescook@chromium.org>
---
v25:
- Make X86_FEATURE_IBT depend on X86_FEATURE_SHSTK.
v24:
- Update for splitting CONFIG_X86_CET to CONFIG_X86_SHADOW_STACK and CONFIG_X86_IBT.
- Move DISABLE_IBT definition to the IBT series.
arch/x86/include/asm/cpufeatures.h | 2 ++
arch/x86/include/asm/disabled-features.h | 8 +++++++-
arch/x86/kernel/cpu/cpuid-deps.c | 2 ++
3 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h
index d0ce5cfd3ac1..daa47bcd2050 100644
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -350,6 +350,7 @@
#define X86_FEATURE_OSPKE (16*32+ 4) /* OS Protection Keys Enable */
#define X86_FEATURE_WAITPKG (16*32+ 5) /* UMONITOR/UMWAIT/TPAUSE Instructions */
#define X86_FEATURE_AVX512_VBMI2 (16*32+ 6) /* Additional AVX512 Vector Bit Manipulation Instructions */
+#define X86_FEATURE_SHSTK (16*32+ 7) /* Shadow Stack */
#define X86_FEATURE_GFNI (16*32+ 8) /* Galois Field New Instructions */
#define X86_FEATURE_VAES (16*32+ 9) /* Vector AES */
#define X86_FEATURE_VPCLMULQDQ (16*32+10) /* Carry-Less Multiplication Double Quadword */
@@ -385,6 +386,7 @@
#define X86_FEATURE_TSXLDTRK (18*32+16) /* TSX Suspend Load Address Tracking */
#define X86_FEATURE_PCONFIG (18*32+18) /* Intel PCONFIG */
#define X86_FEATURE_ARCH_LBR (18*32+19) /* Intel ARCH LBR */
+#define X86_FEATURE_IBT (18*32+20) /* Indirect Branch Tracking */
#define X86_FEATURE_AVX512_FP16 (18*32+23) /* AVX512 FP16 */
#define X86_FEATURE_SPEC_CTRL (18*32+26) /* "" Speculation Control (IBRS + IBPB) */
#define X86_FEATURE_INTEL_STIBP (18*32+27) /* "" Single Thread Indirect Branch Predictors */
diff --git a/arch/x86/include/asm/disabled-features.h b/arch/x86/include/asm/disabled-features.h
index 8f28fafa98b3..b7728f7afb2b 100644
--- a/arch/x86/include/asm/disabled-features.h
+++ b/arch/x86/include/asm/disabled-features.h
@@ -65,6 +65,12 @@
# define DISABLE_SGX (1 << (X86_FEATURE_SGX & 31))
#endif
+#ifdef CONFIG_X86_SHADOW_STACK
+#define DISABLE_SHSTK 0
+#else
+#define DISABLE_SHSTK (1 << (X86_FEATURE_SHSTK & 31))
+#endif
+
/*
* Make sure to add features to the correct mask
*/
@@ -85,7 +91,7 @@
#define DISABLED_MASK14 0
#define DISABLED_MASK15 0
#define DISABLED_MASK16 (DISABLE_PKU|DISABLE_OSPKE|DISABLE_LA57|DISABLE_UMIP| \
- DISABLE_ENQCMD)
+ DISABLE_ENQCMD|DISABLE_SHSTK)
#define DISABLED_MASK17 0
#define DISABLED_MASK18 0
#define DISABLED_MASK19 0
diff --git a/arch/x86/kernel/cpu/cpuid-deps.c b/arch/x86/kernel/cpu/cpuid-deps.c
index defda61f372d..e21d97cc20e4 100644
--- a/arch/x86/kernel/cpu/cpuid-deps.c
+++ b/arch/x86/kernel/cpu/cpuid-deps.c
@@ -75,6 +75,8 @@ static const struct cpuid_dep cpuid_deps[] = {
{ X86_FEATURE_SGX_LC, X86_FEATURE_SGX },
{ X86_FEATURE_SGX1, X86_FEATURE_SGX },
{ X86_FEATURE_SGX2, X86_FEATURE_SGX1 },
+ { X86_FEATURE_SHSTK, X86_FEATURE_XSAVES },
+ { X86_FEATURE_IBT, X86_FEATURE_SHSTK },
{}
};
--
2.21.0
next prev parent reply other threads:[~2021-07-22 20:53 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-22 20:51 [PATCH v28 00/32] Control-flow Enforcement: Shadow Stack Yu-cheng Yu
2021-07-22 20:51 ` [PATCH v28 01/32] Documentation/x86: Add CET description Yu-cheng Yu
2021-07-22 20:51 ` [PATCH v28 02/32] x86/cet/shstk: Add Kconfig option for Shadow Stack Yu-cheng Yu
2021-07-22 20:51 ` Yu-cheng Yu [this message]
2021-07-22 20:51 ` [PATCH v28 04/32] x86/cpufeatures: Introduce CPU setup and option parsing for CET Yu-cheng Yu
2021-08-09 16:06 ` Borislav Petkov
2021-08-10 15:39 ` Yu, Yu-cheng
2021-08-10 16:51 ` Borislav Petkov
2021-07-22 20:51 ` [PATCH v28 05/32] x86/fpu/xstate: Introduce CET MSR and XSAVES supervisor states Yu-cheng Yu
2021-08-09 16:46 ` Borislav Petkov
2021-08-10 15:50 ` Yu, Yu-cheng
2021-07-22 20:51 ` [PATCH v28 06/32] x86/cet: Add control-protection fault handler Yu-cheng Yu
2021-08-09 17:51 ` Borislav Petkov
2021-08-10 16:06 ` Yu, Yu-cheng
2021-07-22 20:51 ` [PATCH v28 07/32] x86/mm: Remove _PAGE_DIRTY from kernel RO pages Yu-cheng Yu
2021-07-22 20:51 ` [PATCH v28 08/32] x86/mm: Move pmd_write(), pud_write() up in the file Yu-cheng Yu
2021-08-09 18:02 ` Borislav Petkov
2021-07-22 20:51 ` [PATCH v28 09/32] x86/mm: Introduce _PAGE_COW Yu-cheng Yu
2021-08-16 10:43 ` Borislav Petkov
2021-08-17 18:24 ` Yu, Yu-cheng
2021-08-17 19:54 ` Borislav Petkov
2021-08-17 20:13 ` Andy Lutomirski
2021-08-17 20:24 ` Borislav Petkov
2021-08-17 20:51 ` Andy Lutomirski
2021-08-17 21:01 ` Borislav Petkov
2021-08-18 16:38 ` Yu, Yu-cheng
2021-08-21 16:27 ` Borislav Petkov
2021-07-22 20:51 ` [PATCH v28 10/32] drm/i915/gvt: Change _PAGE_DIRTY to _PAGE_DIRTY_BITS Yu-cheng Yu
2021-07-22 20:51 ` [PATCH v28 11/32] x86/mm: Update pte_modify for _PAGE_COW Yu-cheng Yu
2021-07-22 20:51 ` [PATCH v28 12/32] x86/mm: Update ptep_set_wrprotect() and pmdp_set_wrprotect() for transition from _PAGE_DIRTY to _PAGE_COW Yu-cheng Yu
2021-08-16 16:01 ` Borislav Petkov
2021-08-17 18:33 ` Yu, Yu-cheng
2021-07-22 20:52 ` [PATCH v28 13/32] mm: Move VM_UFFD_MINOR_BIT from 37 to 38 Yu-cheng Yu
2021-07-22 20:52 ` [PATCH v28 14/32] mm: Introduce VM_SHADOW_STACK for shadow stack memory Yu-cheng Yu
2021-08-16 16:35 ` Borislav Petkov
2021-08-17 18:35 ` Yu, Yu-cheng
2021-07-22 20:52 ` [PATCH v28 15/32] x86/mm: Shadow Stack page fault error checking Yu-cheng Yu
2021-07-22 20:52 ` [PATCH v28 16/32] x86/mm: Update maybe_mkwrite() for shadow stack Yu-cheng Yu
2021-08-16 17:03 ` Borislav Petkov
2021-08-17 18:36 ` Yu, Yu-cheng
2021-07-22 20:52 ` [PATCH v28 17/32] mm: Fixup places that call pte_mkwrite() directly Yu-cheng Yu
2021-07-22 20:52 ` [PATCH v28 18/32] mm: Add guard pages around a shadow stack Yu-cheng Yu
2021-07-22 20:52 ` [PATCH v28 19/32] mm/mmap: Add shadow stack pages to memory accounting Yu-cheng Yu
2021-07-22 20:52 ` [PATCH v28 20/32] mm: Update can_follow_write_pte() for shadow stack Yu-cheng Yu
2021-07-22 20:52 ` [PATCH v28 21/32] mm/mprotect: Exclude shadow stack from preserve_write Yu-cheng Yu
2021-07-22 20:52 ` [PATCH v28 22/32] mm: Re-introduce vm_flags to do_mmap() Yu-cheng Yu
2021-07-22 20:52 ` [PATCH v28 23/32] x86/cet/shstk: Add user-mode shadow stack support Yu-cheng Yu
2021-07-22 20:52 ` [PATCH v28 24/32] x86/process: Change copy_thread() argument 'arg' to 'stack_size' Yu-cheng Yu
2021-07-22 20:52 ` [PATCH v28 25/32] x86/cet/shstk: Handle thread shadow stack Yu-cheng Yu
2021-07-22 21:05 ` Dave Hansen
2021-07-23 17:30 ` Yu, Yu-cheng
2021-07-22 20:52 ` [PATCH v28 26/32] x86/cet/shstk: Introduce shadow stack token setup/verify routines Yu-cheng Yu
2021-07-22 21:15 ` Dave Hansen
2021-07-23 18:01 ` Yu, Yu-cheng
2021-07-22 20:52 ` [PATCH v28 27/32] x86/cet/shstk: Handle signals for shadow stack Yu-cheng Yu
2021-07-22 20:52 ` [PATCH v28 28/32] ELF: Introduce arch_setup_elf_property() Yu-cheng Yu
2021-07-22 20:52 ` [PATCH v28 29/32] x86/cet/shstk: Add arch_prctl functions for shadow stack Yu-cheng Yu
2021-07-22 20:52 ` [PATCH v28 30/32] mm: Move arch_calc_vm_prot_bits() to arch/x86/include/asm/mman.h Yu-cheng Yu
2021-07-22 20:52 ` [PATCH v28 31/32] mm: Update arch_validate_flags() to test vma anonymous Yu-cheng Yu
2021-07-22 20:52 ` [PATCH v28 32/32] mm: Introduce PROT_SHADOW_STACK for shadow stack Yu-cheng Yu
2021-07-22 21:08 ` [PATCH v28 00/32] Control-flow Enforcement: Shadow Stack Dave Hansen
2021-07-23 17:28 ` Yu, Yu-cheng
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