The following commit has been merged into the x86/core branch of tip: Commit-ID: db76667e784428a927cc86b5a6d0cbade416c9e8 Gitweb: https://git.kernel.org/tip/db76667e784428a927cc86b5a6d0cbade416c9e8 Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx> AuthorDate: Tue, 08 Mar 2022 16:30:27 +01:00 Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx> CommitterDate: Tue, 08 Mar 2022 23:53:31 +01:00 x86/ibt,crypto: Add ENDBR for the jump-table entries The code does: ## branch into array mov jump_table(,%rax,8), %bufp JMP_NOSPEC bufp resulting in needing to mark the jump-table entries with ENDBR. Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Acked-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> Link: https://lore.kernel.org/r/20220308154318.110500806@xxxxxxxxxxxxx --- arch/x86/crypto/crc32c-pcl-intel-asm_64.S | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/crypto/crc32c-pcl-intel-asm_64.S b/arch/x86/crypto/crc32c-pcl-intel-asm_64.S index 80c0d22..ec35915 100644 --- a/arch/x86/crypto/crc32c-pcl-intel-asm_64.S +++ b/arch/x86/crypto/crc32c-pcl-intel-asm_64.S @@ -195,6 +195,7 @@ crc_array: .altmacro LABEL crc_ %i .noaltmacro + ENDBR crc32q -i*8(block_0), crc_init crc32q -i*8(block_1), crc1 crc32q -i*8(block_2), crc2 @@ -204,6 +205,7 @@ LABEL crc_ %i .altmacro LABEL crc_ %i .noaltmacro + ENDBR crc32q -i*8(block_0), crc_init crc32q -i*8(block_1), crc1 # SKIP crc32 -i*8(block_2), crc2 ; Don't do this one yet @@ -237,6 +239,7 @@ LABEL crc_ %i ################################################################ LABEL crc_ 0 + ENDBR mov tmp, len cmp $128*24, tmp jae full_block
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