linux-kernel - [PATCH v4 08/13] x86/platform/uv: Adjust GAM MMR references affected by UV5 updates

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20201005203929.148656-9-mike.travis@hpe.com>
Date:   Mon,  5 Oct 2020 15:39:24 -0500
From:   Mike Travis <mike.travis@....com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, Steve Wahl <steve.wahl@....com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Dimitri Sivanich <dimitri.sivanich@....com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Mike Travis <mike.travis@....com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Russ Anderson <russ.anderson@....com>,
        Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy@...radead.org>,
        Alexandre Chartre <alexandre.chartre@...cle.com>,
        Jian Cai <caij2003@...il.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org
Subject: [PATCH v4 08/13] x86/platform/uv: Adjust GAM MMR references affected by UV5 updates

Make modifications to the GAM MMR mappings to accommodate changes for UV5.

Signed-off-by: Mike Travis <mike.travis@....com>
Reviewed-by: Dimitri Sivanich <dimitri.sivanich@....com>
Reviewed-by: Steve Wahl <steve.wahl@....com>
---
 arch/x86/kernel/apic/x2apic_uv_x.c | 30 +++++++++++++++++++++++++-----
 1 file changed, 25 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index f2c5a03b5cf7..948029576441 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -927,12 +927,32 @@ static __init void map_gru_high(int max_pnode)
 
 static __init void map_mmr_high(int max_pnode)
 {
-	union uvh_rh_gam_mmr_overlay_config_u mmr;
-	int shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_BASE_SHFT;
+	unsigned long base;
+	int shift;
+	bool enable;
+
+	if (UVH_RH10_GAM_MMR_OVERLAY_CONFIG) {
+		union uvh_rh10_gam_mmr_overlay_config_u mmr;
+
+		mmr.v = uv_read_local_mmr(UVH_RH10_GAM_MMR_OVERLAY_CONFIG);
+		enable = mmr.s.enable;
+		base = mmr.s.base;
+		shift = UVH_RH10_GAM_MMR_OVERLAY_CONFIG_BASE_SHFT;
+	} else if (UVH_RH_GAM_MMR_OVERLAY_CONFIG) {
+		union uvh_rh_gam_mmr_overlay_config_u mmr;
+
+		mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG);
+		enable = mmr.s.enable;
+		base = mmr.s.base;
+		shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_BASE_SHFT;
+	} else {
+		pr_err("UV:%s:RH_GAM_MMR_OVERLAY_CONFIG MMR undefined?\n",
+			__func__);
+		return;
+	}
 
-	mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG);
-	if (mmr.s.enable)
-		map_high("MMR", mmr.s.base, shift, shift, max_pnode, map_uc);
+	if (enable)
+		map_high("MMR", base, shift, shift, max_pnode, map_uc);
 	else
 		pr_info("UV: MMR disabled\n");
 }
-- 
2.21.0