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Message-ID: <9E0BE1322F2F2246BD820DA9FC397ADE016FC1D7@shsmsx102.ccr.corp.intel.com> Date: Mon, 21 Jul 2014 06:11:19 +0000 From: "Ren, Qiaowei" <qiaowei.ren@...el.com> To: Andi Kleen <andi@...stfloor.org> CC: "H. Peter Anvin" <hpa@...or.com>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, "Hansen, Dave" <dave.hansen@...el.com>, "x86@...nel.org" <x86@...nel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-mm@...ck.org" <linux-mm@...ck.org> Subject: RE: [PATCH v7 07/10] x86, mpx: decode MPX instruction to get bound violation information On 2014-07-21, Andi Kleen wrote: > Qiaowei Ren <qiaowei.ren@...el.com> writes: >> + */ >> +#ifdef CONFIG_X86_64 >> + insn->x86_64 = 1; >> + insn->addr_bytes = 8; >> +#else >> + insn->x86_64 = 0; >> + insn->addr_bytes = 4; >> +#endif > > How would that handle compat mode on a 64bit kernel? > Should likely look at the code segment instead of ifdef. >> + /* Note: the upper 32 bits are ignored in 32-bit mode. */ > > Again correct for compat mode? I believe the upper bits are undefined. > Compat mode will be supported on next patch in future, as 0/ patch mentioned. ^-^ Thanks, Qiaowei -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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