From: Peter Zijlstra <peterz@infradead.org>
To: David Woodhouse <dwmw2@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
Josh Poimboeuf <jpoimboe@redhat.com>
Cc: linux-kernel@vger.kernel.org, Dave Hansen <dave.hansen@intel.com>,
Ashok Raj <ashok.raj@intel.com>,
Tim Chen <tim.c.chen@linux.intel.com>,
Andy Lutomirski <luto@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Greg KH <gregkh@linuxfoundation.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Andi Kleen <ak@linux.intel.com>,
Arjan Van De Ven <arjan.van.de.ven@intel.com>,
Dan Williams <dan.j.williams@intel.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Jun Nakajima <jun.nakajima@intel.com>,
Asit Mallick <asit.k.mallick@intel.com>,
Jason Baron <jbaron@akamai.com>,
rga@amazon.de, Peter Zijlstra <peterz@infradead.org>,
David Woodhouse <dwmw@amazon.co.uk>
Subject: [PATCH 2/2] x86,vmx: Fix indirect call
Date: Thu, 25 Jan 2018 10:58:14 +0100 [thread overview]
Message-ID: <20180125095843.645776917@infradead.org> (raw)
In-Reply-To: <20180125095812.447754815@infradead.org>
[-- Attachment #1: peterz-kvm-vmx-retpoline.patch --]
[-- Type: text/plain, Size: 685 bytes --]
Replace indirect call with CALL_NOSPEC.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
arch/x86/kvm/vmx.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -9129,14 +9129,14 @@ static void vmx_handle_external_intr(str
#endif
"pushf\n\t"
__ASM_SIZE(push) " $%c[cs]\n\t"
- "call *%[entry]\n\t"
+ CALL_NOSPEC
:
#ifdef CONFIG_X86_64
[sp]"=&r"(tmp),
#endif
ASM_CALL_CONSTRAINT
:
- [entry]"r"(entry),
+ THUNK_TARGET(entry),
[ss]"i"(__KERNEL_DS),
[cs]"i"(__KERNEL_CS)
);
next prev parent reply other threads:[~2018-01-25 9:58 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-25 9:58 [PATCH 0/2] KVM retpoline fixes Peter Zijlstra
2018-01-25 9:58 ` [PATCH 1/2] x86,kvm: Fix indirect calls in emulator Peter Zijlstra
2018-01-25 10:34 ` [tip:x86/pti] KVM: x86: Make indirect calls in emulator speculation safe tip-bot for Peter Zijlstra
2018-01-25 9:58 ` Peter Zijlstra [this message]
2018-01-25 10:34 ` [tip:x86/pti] KVM: VMX: Make indirect call specualation safe tip-bot for Peter Zijlstra
2018-01-25 13:19 ` [tip:x86/pti] KVM: VMX: Make indirect call speculation safe tip-bot for Peter Zijlstra
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