From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753426AbeAJSsR (ORCPT + 1 other); Wed, 10 Jan 2018 13:48:17 -0500 Received: from terminus.zytor.com ([65.50.211.136]:56439 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752785AbeAJSsP (ORCPT ); Wed, 10 Jan 2018 13:48:15 -0500 Date: Wed, 10 Jan 2018 10:42:40 -0800 From: tip-bot for David Woodhouse Message-ID: Cc: tglx@linutronix.de, tim.c.chen@linux.intel.com, pjt@google.com, arjan@linux.intel.com, luto@amacapital.net, hpa@zytor.com, riel@redhat.com, dave.hansen@intel.com, gregkh@linux-foundation.org, torvalds@linux-foundation.org, linux-kernel@vger.kernel.org, mingo@kernel.org, keescook@google.com, peterz@infradead.org, dwmw@amazon.co.uk, jikos@kernel.org, ak@linux.intel.com Reply-To: hpa@zytor.com, luto@amacapital.net, pjt@google.com, arjan@linux.intel.com, tglx@linutronix.de, tim.c.chen@linux.intel.com, keescook@google.com, peterz@infradead.org, linux-kernel@vger.kernel.org, mingo@kernel.org, dave.hansen@intel.com, torvalds@linux-foundation.org, gregkh@linux-foundation.org, riel@redhat.com, jikos@kernel.org, dwmw@amazon.co.uk, ak@linux.intel.com In-Reply-To: <1515508997-6154-8-git-send-email-dwmw@amazon.co.uk> References: <1515508997-6154-8-git-send-email-dwmw@amazon.co.uk> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/pti] x86/retpoline/hyperv: Convert assembler indirect jumps Git-Commit-ID: f14fd95d2f3e611619756ea3c008aee3b4bd4978 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: Commit-ID: f14fd95d2f3e611619756ea3c008aee3b4bd4978 Gitweb: https://git.kernel.org/tip/f14fd95d2f3e611619756ea3c008aee3b4bd4978 Author: David Woodhouse AuthorDate: Tue, 9 Jan 2018 14:43:13 +0000 Committer: Thomas Gleixner CommitDate: Wed, 10 Jan 2018 19:36:25 +0100 x86/retpoline/hyperv: Convert assembler indirect jumps Convert all indirect jumps in hyperv inline asm code to use non-speculative sequences when CONFIG_RETPOLINE is enabled. Signed-off-by: David Woodhouse Signed-off-by: Thomas Gleixner Acked-by: Arjan van de Ven Acked-by: Ingo Molnar Cc: gnomes@lxorguk.ukuu.org.uk Cc: Rik van Riel Cc: Andi Kleen Cc: Peter Zijlstra Cc: Linus Torvalds Cc: Jiri Kosina Cc: Andy Lutomirski Cc: Dave Hansen Cc: Kees Cook Cc: Tim Chen Cc: Greg Kroah-Hartman Cc: Paul Turner Link: https://lkml.kernel.org/r/1515508997-6154-8-git-send-email-dwmw@amazon.co.uk --- arch/x86/include/asm/mshyperv.h | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h index 581bb54..5119e4b 100644 --- a/arch/x86/include/asm/mshyperv.h +++ b/arch/x86/include/asm/mshyperv.h @@ -7,6 +7,7 @@ #include #include #include +#include /* * The below CPUID leaves are present if VersionAndFeatures.HypervisorPresent @@ -186,10 +187,11 @@ static inline u64 hv_do_hypercall(u64 control, void *input, void *output) return U64_MAX; __asm__ __volatile__("mov %4, %%r8\n" - "call *%5" + CALL_NOSPEC : "=a" (hv_status), ASM_CALL_CONSTRAINT, "+c" (control), "+d" (input_address) - : "r" (output_address), "m" (hv_hypercall_pg) + : "r" (output_address), + THUNK_TARGET(hv_hypercall_pg) : "cc", "memory", "r8", "r9", "r10", "r11"); #else u32 input_address_hi = upper_32_bits(input_address); @@ -200,13 +202,13 @@ static inline u64 hv_do_hypercall(u64 control, void *input, void *output) if (!hv_hypercall_pg) return U64_MAX; - __asm__ __volatile__("call *%7" + __asm__ __volatile__(CALL_NOSPEC : "=A" (hv_status), "+c" (input_address_lo), ASM_CALL_CONSTRAINT : "A" (control), "b" (input_address_hi), "D"(output_address_hi), "S"(output_address_lo), - "m" (hv_hypercall_pg) + THUNK_TARGET(hv_hypercall_pg) : "cc", "memory"); #endif /* !x86_64 */ return hv_status; @@ -227,10 +229,10 @@ static inline u64 hv_do_fast_hypercall8(u16 code, u64 input1) #ifdef CONFIG_X86_64 { - __asm__ __volatile__("call *%4" + __asm__ __volatile__(CALL_NOSPEC : "=a" (hv_status), ASM_CALL_CONSTRAINT, "+c" (control), "+d" (input1) - : "m" (hv_hypercall_pg) + : THUNK_TARGET(hv_hypercall_pg) : "cc", "r8", "r9", "r10", "r11"); } #else @@ -238,13 +240,13 @@ static inline u64 hv_do_fast_hypercall8(u16 code, u64 input1) u32 input1_hi = upper_32_bits(input1); u32 input1_lo = lower_32_bits(input1); - __asm__ __volatile__ ("call *%5" + __asm__ __volatile__ (CALL_NOSPEC : "=A"(hv_status), "+c"(input1_lo), ASM_CALL_CONSTRAINT : "A" (control), "b" (input1_hi), - "m" (hv_hypercall_pg) + THUNK_TARGET(hv_hypercall_pg) : "cc", "edi", "esi"); } #endif