[patch] x86/UV: Set n_lshift based on GAM_GR_CONFIG MMR for UV3

[Dimitri Sivanich]

Set the UV n_lshift value based on the GAM_GR_CONFIG MMR for UV3, making it
independent of the socket m_val.

Remove unneeded macros.

Signed-off-by: Dimitri Sivanich <sivanich@xxxxxxx>
---
 arch/x86/include/asm/uv/uv_hub.h   |   12 ---------
 arch/x86/include/asm/uv/uv_mmrs.h  |   42 ++++++++++++++++++++++++++++++++-
 arch/x86/kernel/apic/x2apic_uv_x.c |   15 +++++++++--
 3 files changed, 54 insertions(+), 15 deletions(-)

Index: linux/arch/x86/kernel/apic/x2apic_uv_x.c
===================================================================
--- linux.orig/arch/x86/kernel/apic/x2apic_uv_x.c
+++ linux/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -5,7 +5,7 @@
  *
  * SGI UV APIC functions (note: not an Intel compatible APIC)
  *
- * Copyright (C) 2007-2013 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2007-2014 Silicon Graphics, Inc. All rights reserved.
  */
 #include <linux/cpumask.h>
 #include <linux/hardirq.h>
@@ -843,12 +843,14 @@ void uv_cpu_init(void)
 void __init uv_system_init(void)
 {
 	union uvh_rh_gam_config_mmr_u  m_n_config;
+	union uv3h_gr0_gam_gr_config_u m_gr_config;
 	union uvh_node_id_u node_id;
 	unsigned long gnode_upper, lowmem_redir_base, lowmem_redir_size;
 	int bytes, nid, cpu, lcpu, pnode, blade, i, j, m_val, n_val;
 	int gnode_extra, min_pnode = 999999, max_pnode = -1;
 	unsigned long mmr_base, present, paddr;
 	unsigned short pnode_mask;
+	unsigned char n_lshift;
 	char *hub = (is_uv1_hub() ? "UV1" :
 		    (is_uv2_hub() ? "UV2" :
 				    "UV3"));
@@ -859,6 +861,14 @@ void __init uv_system_init(void)
 	m_n_config.v = uv_read_local_mmr(UVH_RH_GAM_CONFIG_MMR );
 	m_val = m_n_config.s.m_skt;
 	n_val = m_n_config.s.n_skt;
+	if (is_uv1_hub())
+		n_lshift = m_val;
+	else if (is_uv2_hub())
+		n_lshift = m_val == 40 ? 40 : 39;
+	else {
+		m_gr_config.v = uv_read_local_mmr(UV3H_GR0_GAM_GR_CONFIG);
+		n_lshift = m_gr_config.s3.m_skt;
+	}
 	pnode_mask = (1 << n_val) - 1;
 	mmr_base =
 	    uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
@@ -935,8 +945,7 @@ void __init uv_system_init(void)
 		uv_cpu_hub_info(cpu)->hub_revision = uv_hub_info->hub_revision;
 
 		uv_cpu_hub_info(cpu)->m_shift = 64 - m_val;
-		uv_cpu_hub_info(cpu)->n_lshift = is_uv2_1_hub() ?
-				(m_val == 40 ? 40 : 39) : m_val;
+		uv_cpu_hub_info(cpu)->n_lshift = n_lshift;
 
 		pnode = uv_apicid_to_pnode(apicid);
 		blade = boot_pnode_to_blade(pnode);
Index: linux/arch/x86/include/asm/uv/uv_mmrs.h
===================================================================
--- linux.orig/arch/x86/include/asm/uv/uv_mmrs.h
+++ linux/arch/x86/include/asm/uv/uv_mmrs.h
@@ -5,7 +5,7 @@
  *
  * SGI UV MMR definitions
  *
- * Copyright (C) 2007-2013 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2007-2014 Silicon Graphics, Inc. All rights reserved.
  */
 
 #ifndef _ASM_X86_UV_UV_MMRS_H
@@ -2803,6 +2803,46 @@ union uv1h_lb_target_physical_apic_id_ma
 };
 
 /* ========================================================================= */
+/*                          UV3H_GR0_GAM_GR_CONFIG                           */
+/* ========================================================================= */
+#define UV3H_GR0_GAM_GR_CONFIG				0xc00028UL
+
+#define UV3H_GR0_GAM_GR_CONFIG_M_SKT_SHFT		0
+#define UV3H_GR0_GAM_GR_CONFIG_SUBSPACE_SHFT		10
+#define UV3H_GR0_GAM_GR_CONFIG_M_SKT_MASK		0x000000000000003fUL
+#define UV3H_GR0_GAM_GR_CONFIG_SUBSPACE_MASK		0x0000000000000400UL
+
+union uv3h_gr0_gam_gr_config_u {
+	unsigned long	v;
+	struct uv3h_gr0_gam_gr_config_s {
+		unsigned long	m_skt:6;			/* RW */
+		unsigned long	undef_6_9:4;			/* Undefined */
+		unsigned long	subspace:1;			/* RW */
+		unsigned long	reserved:53;
+	} s3;
+};
+
+/* ========================================================================= */
+/*                          UV3H_GR1_GAM_GR_CONFIG                           */
+/* ========================================================================= */
+#define UV3H_GR1_GAM_GR_CONFIG				0x1000028UL
+
+#define UV3H_GR1_GAM_GR_CONFIG_M_SKT_SHFT		0
+#define UV3H_GR1_GAM_GR_CONFIG_SUBSPACE_SHFT		10
+#define UV3H_GR1_GAM_GR_CONFIG_M_SKT_MASK		0x000000000000003fUL
+#define UV3H_GR1_GAM_GR_CONFIG_SUBSPACE_MASK		0x0000000000000400UL
+
+union uv3h_gr1_gam_gr_config_u {
+	unsigned long	v;
+	struct uv3h_gr1_gam_gr_config_s {
+		unsigned long	m_skt:6;			/* RW */
+		unsigned long	undef_6_9:4;			/* Undefined */
+		unsigned long	subspace:1;			/* RW */
+		unsigned long	reserved:53;
+	} s3;
+};
+
+/* ========================================================================= */
 /*                   UV3H_RH_GAM_MMIOH_OVERLAY_CONFIG0_MMR                   */
 /* ========================================================================= */
 #define UV3H_RH_GAM_MMIOH_OVERLAY_CONFIG0_MMR		0x1603000UL
Index: linux/arch/x86/include/asm/uv/uv_hub.h
===================================================================
--- linux.orig/arch/x86/include/asm/uv/uv_hub.h
+++ linux/arch/x86/include/asm/uv/uv_hub.h
@@ -5,7 +5,7 @@
  *
  * SGI UV architectural definitions
  *
- * Copyright (C) 2007-2013 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2007-2014 Silicon Graphics, Inc. All rights reserved.
  */
 
 #ifndef _ASM_X86_UV_UV_HUB_H
@@ -204,16 +204,6 @@ static inline int is_uvx_hub(void)
 	return uv_hub_info->hub_revision >= UV2_HUB_REVISION_BASE;
 }
 
-static inline int is_uv2_1_hub(void)
-{
-	return uv_hub_info->hub_revision == UV2_HUB_REVISION_BASE;
-}
-
-static inline int is_uv2_2_hub(void)
-{
-	return uv_hub_info->hub_revision == UV2_HUB_REVISION_BASE + 1;
-}
-
 union uvh_apicid {
     unsigned long       v;
     struct uvh_apicid_s {
--
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