From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AB8JxZoZVTP4K1EInLlueSu3R+gCdd+CzHjD9ngw6JE1pyv9l6vhr7KGbWAeAufrAMtwxdtsbO+C ARC-Seal: i=1; a=rsa-sha256; t=1526937670; cv=none; d=google.com; s=arc-20160816; b=S0xkcIVg42zCzeFayKa6RA7ZLYNDs2Wlax8lHJflUtYFMP6+e1BQyvJykxVVrcWPy6 03AODChS/i/TYVjGDY5iruIln5tm/l4tq+OwVMRXRbZSUUUyBB26c9cy1zTn9DdUipLQ sk2YdhOue8ylnzpnvGJa9UJzPWZRiLrd0FH6GYrcDrxLQOLAARqzkEV0tdTu3l7Q30Cv xeE29b3jyqqzBFGfwlrcHguwv1UpvDfZZcmq4Db696AVju7fG6nWC8QZN5dRUEaIk+sG VctrnExX1o/8OlLvfJ4H3kOG7F6xoo4WkOOHFqtPFKJgtaIDa16XsResYXlZy8U2yFTW Jj7Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:user-agent:references:in-reply-to:message-id:date :subject:cc:to:from:dkim-signature:arc-authentication-results; bh=WpXxxrIHuePwciSZzKdE+ra5I3rca17n7uhv4mEoynA=; b=jENCYs/q5uGxyeIvrVrTtaEBXMaNHS0oOBRiZUk/xjApUyPwlx0gFcXjhKAWkLvRWi 7d/HUBIEIwxEIAiaw2rMNgDyYdlE5OOXnm6RF9ddINUY45kGKvDTALbr7LUSROLDGt9y dh6ZYNcQOSQ63wSzJQe2pTMirogp/l161IH+7GVlZOpDUlg80WmAZLAv5P2puQ+N8hdr sDV8y4yNgFFH8nzt5J/rqspus0TMMulN3R8OoRe1lxmdsVdOXJSwxMQLytXfHYNj+HEs Rs/LXXWIvdVHe3gYQZ/Qo4nrzmKBY0RF/7eeOI7fxSVQOqUwGiku98C9l4lJQuljdHxs fkqA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=NfT18hnl; spf=pass (google.com: domain of srs0=nia/=ii=linuxfoundation.org=gregkh@kernel.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=SRS0=nia/=II=linuxfoundation.org=gregkh@kernel.org Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=NfT18hnl; spf=pass (google.com: domain of srs0=nia/=ii=linuxfoundation.org=gregkh@kernel.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=SRS0=nia/=II=linuxfoundation.org=gregkh@kernel.org From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jim Mattson , Konrad Rzeszutek Wilk , Thomas Gleixner , Linus Torvalds Subject: [PATCH 4.14 79/95] x86/cpu: Make alternative_msr_write work for 32-bit code Date: Mon, 21 May 2018 23:12:09 +0200 Message-Id: <20180521210502.045569588@linuxfoundation.org> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180521210447.219380974@linuxfoundation.org> References: <20180521210447.219380974@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-LABELS: =?utf-8?b?IlxcU2VudCI=?= X-GMAIL-THRID: =?utf-8?q?1601109915496238144?= X-GMAIL-MSGID: =?utf-8?q?1601110195118895894?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jim Mattson commit 5f2b745f5e1304f438f9b2cd03ebc8120b6e0d3b upstream Cast val and (val >> 32) to (u32), so that they fit in a general-purpose register in both 32-bit and 64-bit code. [ tglx: Made it u32 instead of uintptr_t ] Fixes: c65732e4f721 ("x86/cpu: Restore CPUID_8000_0008_EBX reload") Signed-off-by: Jim Mattson Signed-off-by: Konrad Rzeszutek Wilk Signed-off-by: Thomas Gleixner Acked-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman --- arch/x86/include/asm/nospec-branch.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/arch/x86/include/asm/nospec-branch.h +++ b/arch/x86/include/asm/nospec-branch.h @@ -265,8 +265,8 @@ void alternative_msr_write(unsigned int { asm volatile(ALTERNATIVE("", "wrmsr", %c[feature]) : : "c" (msr), - "a" (val), - "d" (val >> 32), + "a" ((u32)val), + "d" ((u32)(val >> 32)), [feature] "i" (feature) : "memory"); }