linux-kernel - [tip:x86/platform] x86/platform/UV: Fix UV4A support on new Intel Processors

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Date:   Mon, 15 Jan 2018 19:52:59 -0800
From:   tip-bot for Mike Travis <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     torvalds@...ux-foundation.org, abanman@....com, sivanich@....com,
        tglx@...utronix.de, linux-kernel@...r.kernel.org, rja@....com,
        peterz@...radead.org, mingo@...nel.org, mike.travis@....com,
        hpa@...or.com, akpm@...ux-foundation.org
Subject: [tip:x86/platform] x86/platform/UV: Fix UV4A support on new Intel
 Processors

Commit-ID:  62807106c3219d2d6ddbfc778a5ee7e6ba38e58f
Gitweb:     https://git.kernel.org/tip/62807106c3219d2d6ddbfc778a5ee7e6ba38e58f
Author:     Mike Travis <mike.travis@....com>
AuthorDate: Mon, 8 Jan 2018 13:40:00 -0600
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 16 Jan 2018 03:58:37 +0100

x86/platform/UV: Fix UV4A support on new Intel Processors

Upcoming Intel CascadeLake and IceLake processors have some architecture
changes that required fixes in the UV4 HUB bringing that chip to
revision 2.  The nomenclature for that new chip is "UV4A".

This patch fixes the references for the expanded MMR definitions in the
previous (automated) patch.

Signed-off-by: Mike Travis <mike.travis@....com>
Acked-by: Andrew Banman <abanman@....com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Dimitri Sivanich <sivanich@....com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Russ Anderson <rja@....com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Link: http://lkml.kernel.org/r/1515440405-20880-3-git-send-email-mike.travis@hpe.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/apic/x2apic_uv_x.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 6de35fc..ebb7d26 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -768,6 +768,7 @@ static __init void map_gru_high(int max_pnode)
 		return;
 	}
 
+	/* Only UV3 has distributed GRU mode */
 	if (is_uv3_hub() && gru.s3.mode) {
 		map_gru_distributed(gru.v);
 		return;
@@ -817,17 +818,20 @@ static __initdata struct mmioh_config mmiohs[] = {
 /* UV3 & UV4 have identical MMIOH overlay configs */
 static __init void map_mmioh_high_uv3(int index, int min_pnode, int max_pnode)
 {
-	union uv3h_rh_gam_mmioh_overlay_config0_mmr_u overlay;
+	union uvh_rh_gam_mmioh_overlay_config0_mmr_u overlay;
 	unsigned long mmr;
 	unsigned long base;
+	unsigned long m_overlay;
 	int i, n, shift, m_io, max_io;
 	int nasid, lnasid, fi, li;
 	char *id;
 
 	id = mmiohs[index].id;
 	overlay.v = uv_read_local_mmr(mmiohs[index].overlay);
+	m_overlay = mmiohs[index].overlay;
 
-	pr_info("UV: %s overlay 0x%lx base:0x%x m_io:%d\n", id, overlay.v, overlay.s3.base, overlay.s3.m_io);
+	pr_info("UV: %s overlay 0x%lx(@0x%lx) base:0x%x m_io:%d\n",
+		id, overlay.v, m_overlay, overlay.s3.base, overlay.s3.m_io);
 	if (!overlay.s3.enable) {
 		pr_info("UV: %s disabled\n", id);
 		return;
@@ -844,10 +848,14 @@ static __init void map_mmioh_high_uv3(int index, int min_pnode, int max_pnode)
 	max_io = lnasid = fi = li = -1;
 
 	for (i = 0; i < n; i++) {
-		union uv3h_rh_gam_mmioh_redirect_config0_mmr_u redirect;
+		union uvh_rh_gam_mmioh_redirect_config0_mmr_u redirect;
+		unsigned long m_redirect = mmr + i * 8;
 
 		redirect.v = uv_read_local_mmr(mmr + i * 8);
 		nasid = redirect.s3.nasid;
+		printk_once(KERN_INFO
+			"UV: %s redirect 0x%lx(@0x%lx) 0x%04x\n",
+			id, redirect.v, m_redirect, nasid);
 		/* Invalid NASID: */
 		if (nasid < min_pnode || max_pnode < nasid)
 			nasid = -1;