From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from numascale.com ([213.162.240.84]:49634 "EHLO numascale.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751710AbaJSBrB (ORCPT ); Sat, 18 Oct 2014 21:47:01 -0400 From: Daniel J Blueman To: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Bjorn Helgaas Cc: Daniel J Blueman , x86@kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Steffen Persvold Subject: [PATCH v2 2/5] Numachip: APIC fixes Date: Sun, 19 Oct 2014 09:45:49 +0800 Message-Id: <1413683152-31302-2-git-send-email-daniel@numascale.com> In-Reply-To: <1413683152-31302-1-git-send-email-daniel@numascale.com> References: <1413683152-31302-1-git-send-email-daniel@numascale.com> Sender: linux-pci-owner@vger.kernel.org List-ID: Fix 16-bit APIC ID truncation and redundant APIC ICR idle polling for IPI to self (AMD64 APICs are documented in the system developer manuals to queue APIC writes). Signed-off-by: Daniel J Blueman --- arch/x86/kernel/apic/apic_numachip.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/apic/apic_numachip.c b/arch/x86/kernel/apic/apic_numachip.c index 81d70ba..bd083c0 100644 --- a/arch/x86/kernel/apic/apic_numachip.c +++ b/arch/x86/kernel/apic/apic_numachip.c @@ -40,7 +40,7 @@ static unsigned int get_apic_id(unsigned long x) unsigned int id; rdmsrl(MSR_FAM10H_NODE_ID, value); - id = ((x >> 24) & 0xffU) | ((value << 2) & 0x3f00U); + id = ((x >> 24) & 0xffU) | ((value << 2) & 0xff00U); return id; } @@ -145,7 +145,7 @@ static void numachip_send_IPI_all(int vector) static void numachip_send_IPI_self(int vector) { - __default_send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL); + apic_write(APIC_SELF_IPI, vector); } static int __init numachip_probe(void) -- 1.9.1