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Subject[PATCH 4/4] x86/platform/uv: Add gap hole end size
Date
Show value of gap end in kernel log which equates to number of physical
address bits used by system. The structure stores PA bits 56:26, for
64MB granularity, up to 64PB max size.

Signed-off-by: Mike Travis <mike.travis@hpe.com>
Reviewed-by: Steve Wahl <steve.wahl@hpe.com>
---
arch/x86/kernel/apic/x2apic_uv_x.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 387d6533549a..146f0f63a43b 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -1346,7 +1346,7 @@ static void __init decode_gam_params(unsigned long ptr)
static void __init decode_gam_rng_tbl(unsigned long ptr)
{
struct uv_gam_range_entry *gre = (struct uv_gam_range_entry *)ptr;
- unsigned long lgre = 0;
+ unsigned long lgre = 0, gend = 0;
int index = 0;
int sock_min = 999999, pnode_min = 99999;
int sock_max = -1, pnode_max = -1;
@@ -1380,6 +1380,9 @@ static void __init decode_gam_rng_tbl(unsigned long ptr)
flag, size, suffix[order],
gre->type, gre->nasid, gre->sockid, gre->pnode);

+ if (gre->type == UV_GAM_RANGE_TYPE_HOLE)
+ gend = (unsigned long)gre->limit << UV_GAM_RANGE_SHFT;
+
/* update to next range start */
lgre = gre->limit;
if (sock_min > gre->sockid)
@@ -1397,7 +1400,8 @@ static void __init decode_gam_rng_tbl(unsigned long ptr)
_max_pnode = pnode_max;
_gr_table_len = index;

- pr_info("UV: GRT: %d entries, sockets(min:%x,max:%x) pnodes(min:%x,max:%x)\n", index, _min_socket, _max_socket, _min_pnode, _max_pnode);
+ pr_info("UV: GRT: %d entries, sockets(min:%x,max:%x), pnodes(min:%x,max:%x), gap_end(%d)\n",
+ index, _min_socket, _max_socket, _min_pnode, _max_pnode, fls64(gend));
}

/* Walk through UVsystab decoding the fields */
--
2.26.2
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