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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	stable@vger.kernel.org,
	"Peter Zijlstra (Intel)" <peterz@infradead.org>,
	Borislav Petkov <bp@suse.de>,
	Josh Poimboeuf <jpoimboe@kernel.org>,
	Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Subject: [PATCH 5.18 07/61] x86/cpufeatures: Move RETPOLINE flags to word 11
Date: Tue, 12 Jul 2022 20:39:04 +0200	[thread overview]
Message-ID: <20220712183237.243340693@linuxfoundation.org> (raw)
In-Reply-To: <20220712183236.931648980@linuxfoundation.org>

From: Peter Zijlstra <peterz@infradead.org>

commit a883d624aed463c84c22596006e5a96f5b44db31 upstream.

In order to extend the RETPOLINE features to 4, move them to word 11
where there is still room. This mostly keeps DISABLE_RETPOLINE
simple.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/x86/include/asm/cpufeatures.h |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -203,8 +203,8 @@
 #define X86_FEATURE_PROC_FEEDBACK	( 7*32+ 9) /* AMD ProcFeedbackInterface */
 /* FREE!                                ( 7*32+10) */
 #define X86_FEATURE_PTI			( 7*32+11) /* Kernel Page Table Isolation enabled */
-#define X86_FEATURE_RETPOLINE		( 7*32+12) /* "" Generic Retpoline mitigation for Spectre variant 2 */
-#define X86_FEATURE_RETPOLINE_LFENCE	( 7*32+13) /* "" Use LFENCE for Spectre variant 2 */
+/* FREE!				( 7*32+12) */
+/* FREE!				( 7*32+13) */
 #define X86_FEATURE_INTEL_PPIN		( 7*32+14) /* Intel Processor Inventory Number */
 #define X86_FEATURE_CDP_L2		( 7*32+15) /* Code and Data Prioritization L2 */
 #define X86_FEATURE_MSR_SPEC_CTRL	( 7*32+16) /* "" MSR SPEC_CTRL is implemented */
@@ -295,6 +295,10 @@
 #define X86_FEATURE_PER_THREAD_MBA	(11*32+ 7) /* "" Per-thread Memory Bandwidth Allocation */
 #define X86_FEATURE_SGX1		(11*32+ 8) /* "" Basic SGX */
 #define X86_FEATURE_SGX2		(11*32+ 9) /* "" SGX Enclave Dynamic Memory Management (EDMM) */
+/* FREE!				(11*32+10) */
+/* FREE!				(11*32+11) */
+#define X86_FEATURE_RETPOLINE		(11*32+12) /* "" Generic Retpoline mitigation for Spectre variant 2 */
+#define X86_FEATURE_RETPOLINE_LFENCE	(11*32+13) /* "" Use LFENCE for Spectre variant 2 */
 
 /* Intel-defined CPU features, CPUID level 0x00000007:1 (EAX), word 12 */
 #define X86_FEATURE_AVX_VNNI		(12*32+ 4) /* AVX VNNI instructions */



  parent reply	other threads:[~2022-07-12 19:08 UTC|newest]

Thread overview: 83+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-12 18:38 [PATCH 5.18 00/61] 5.18.12-rc1 review Greg Kroah-Hartman
2022-07-12 18:38 ` [PATCH 5.18 01/61] x86/traps: Use pt_regs directly in fixup_bad_iret() Greg Kroah-Hartman
2022-07-12 18:38 ` [PATCH 5.18 02/61] x86/entry: Switch the stack after error_entry() returns Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 03/61] x86/entry: Move PUSH_AND_CLEAR_REGS out of error_entry() Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 04/61] x86/entry: Dont call error_entry() for XENPV Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 05/61] x86/entry: Remove skip_r11rcx Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 06/61] x86/kvm/vmx: Make noinstr clean Greg Kroah-Hartman
2022-07-12 18:39 ` Greg Kroah-Hartman [this message]
2022-07-12 18:39 ` [PATCH 5.18 08/61] x86/retpoline: Cleanup some #ifdefery Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 09/61] x86/retpoline: Swizzle retpoline thunk Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 10/61] x86/retpoline: Use -mfunction-return Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 11/61] x86: Undo return-thunk damage Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 12/61] x86,objtool: Create .return_sites Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 13/61] objtool: skip non-text sections when adding return-thunk sites Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 14/61] x86,static_call: Use alternative RET encoding Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 15/61] x86/ftrace: " Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 16/61] x86/bpf: " Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 17/61] x86/kvm: Fix SETcc emulation for return thunks Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 18/61] x86/vsyscall_emu/64: Dont use RET in vsyscall emulation Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 19/61] x86/sev: Avoid using __x86_return_thunk Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 20/61] x86: Use return-thunk in asm code Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 21/61] x86/entry: Avoid very early RET Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 22/61] objtool: Treat .text.__x86.* as noinstr Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 23/61] x86: Add magic AMD return-thunk Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 24/61] x86/bugs: Report AMD retbleed vulnerability Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 25/61] x86/bugs: Add AMD retbleed= boot parameter Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 26/61] x86/bugs: Enable STIBP for JMP2RET Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 27/61] x86/bugs: Keep a per-CPU IA32_SPEC_CTRL value Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 28/61] x86/entry: Add kernel IBRS implementation Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 29/61] x86/bugs: Optimize SPEC_CTRL MSR writes Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 30/61] x86/speculation: Add spectre_v2=ibrs option to support Kernel IBRS Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 31/61] x86/bugs: Split spectre_v2_select_mitigation() and spectre_v2_user_select_mitigation() Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 32/61] x86/bugs: Report Intel retbleed vulnerability Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 33/61] intel_idle: Disable IBRS during long idle Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 34/61] objtool: Update Retpoline validation Greg Kroah-Hartman
2022-07-13  7:45   ` Jiri Slaby
2022-07-13  7:54     ` Jiri Slaby
2022-07-13  8:17       ` Greg Kroah-Hartman
2022-07-13  9:21         ` Borislav Petkov
2022-07-13  9:50           ` [PATCH] x86/asm/32: fix ANNOTATE_UNRET_SAFE use on 32bit Jiri Slaby
2022-07-13 10:45     ` [tip: x86/urgent] x86/asm/32: Fix ANNOTATE_UNRET_SAFE use on 32-bit tip-bot2 for Jiri Slaby
2022-07-13 10:52     ` tip-bot2 for Jiri Slaby
2022-07-12 18:39 ` [PATCH 5.18 35/61] x86/xen: Rename SYS* entry points Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 36/61] x86/xen: Add UNTRAIN_RET Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 37/61] x86/bugs: Add retbleed=ibpb Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 38/61] x86/bugs: Do IBPB fallback check only once Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 39/61] objtool: Add entry UNRET validation Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 40/61] x86/cpu/amd: Add Spectral Chicken Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 41/61] x86/speculation: Fix RSB filling with CONFIG_RETPOLINE=n Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 42/61] x86/speculation: Fix firmware entry SPEC_CTRL handling Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 43/61] x86/speculation: Fix SPEC_CTRL write on SMT state change Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 44/61] x86/speculation: Use cached host SPEC_CTRL value for guest entry/exit Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 45/61] x86/speculation: Remove x86_spec_ctrl_mask Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 46/61] objtool: Re-add UNWIND_HINT_{SAVE_RESTORE} Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 47/61] KVM: VMX: Flatten __vmx_vcpu_run() Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 48/61] KVM: VMX: Convert launched argument to flags Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 49/61] KVM: VMX: Prevent guest RSB poisoning attacks with eIBRS Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 50/61] KVM: VMX: Fix IBRS handling after vmexit Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 51/61] x86/speculation: Fill RSB on vmexit for IBRS Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 52/61] KVM: VMX: Prevent RSB underflow before vmenter Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 53/61] x86/common: Stamp out the stepping madness Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 54/61] x86/cpu/amd: Enumerate BTC_NO Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 55/61] x86/retbleed: Add fine grained Kconfig knobs Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 56/61] x86/bugs: Add Cannon lake to RETBleed affected CPU list Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 57/61] x86/entry: Move PUSH_AND_CLEAR_REGS() back into error_entry Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 58/61] x86/bugs: Do not enable IBPB-on-entry when IBPB is not supported Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 59/61] x86/kexec: Disable RET on kexec Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 60/61] x86/speculation: Disable RRSBA behavior Greg Kroah-Hartman
2022-07-12 18:39 ` [PATCH 5.18 61/61] x86/static_call: Serialize __static_call_fixup() properly Greg Kroah-Hartman
2022-07-12 23:52 ` [PATCH 5.18 00/61] 5.18.12-rc1 review Florian Fainelli
2022-07-13  0:43 ` Zan Aziz
2022-07-13  3:16 ` Shuah Khan
2022-07-13  8:30 ` Bagas Sanjaya
2022-07-13 10:06 ` Sudip Mukherjee (Codethink)
2022-07-13 10:17 ` Ron Economos
2022-07-13 11:03 ` Naresh Kamboju
2022-07-13 13:03   ` Greg Kroah-Hartman
2022-07-13 13:58     ` Naresh Kamboju
2022-07-13 16:54       ` Thadeu Lima de Souza Cascardo
2022-07-13 14:12     ` Peter Zijlstra
2022-07-13 22:18 ` Guenter Roeck
2022-07-13 22:21 ` Rudi Heitbaum
2022-07-15 11:27 ` Greg Kroah-Hartman

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