[tip: x86/platform] x86/platform/uv: Update UV5 MMR references in UV GRU

From: tip-bot2 for Mike Travis
Date: Wed Oct 07 2020 - 03:13:16 EST


The following commit has been merged into the x86/platform branch of tip:

Commit-ID: a74a7e992caf0745f548a63b263ac34c6a4a29dd
Gitweb: https://git.kernel.org/tip/a74a7e992caf0745f548a63b263ac34c6a4a29dd
Author: Mike Travis <mike.travis@xxxxxxx>
AuthorDate: Mon, 05 Oct 2020 15:39:25 -05:00
Committer: Borislav Petkov <bp@xxxxxxx>
CommitterDate: Wed, 07 Oct 2020 09:08:00 +02:00

x86/platform/uv: Update UV5 MMR references in UV GRU

Make modifications to the GRU mappings to accommodate changes for UV5.

Signed-off-by: Mike Travis <mike.travis@xxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Reviewed-by: Dimitri Sivanich <dimitri.sivanich@xxxxxxx>
Reviewed-by: Steve Wahl <steve.wahl@xxxxxxx>
Link: https://lkml.kernel.org/r/20201005203929.148656-10-mike.travis@xxxxxxx
---
arch/x86/kernel/apic/x2apic_uv_x.c | 30 +++++++++++++++++++++++------
1 file changed, 24 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 5aed07f..64a1c59 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -82,6 +82,9 @@ static unsigned long __init uv_early_read_mmr(unsigned long addr)

static inline bool is_GRU_range(u64 start, u64 end)
{
+ if (!gru_start_paddr)
+ return false;
+
return start >= gru_start_paddr && end <= gru_end_paddr;
}

@@ -909,13 +912,24 @@ static __init void map_high(char *id, unsigned long base, int pshift, int bshift
static __init void map_gru_high(int max_pnode)
{
union uvh_rh_gam_gru_overlay_config_u gru;
- int shift = UVH_RH_GAM_GRU_OVERLAY_CONFIG_BASE_SHFT;
- unsigned long mask = UVH_RH_GAM_GRU_OVERLAY_CONFIG_BASE_MASK;
- unsigned long base;
+ unsigned long mask, base;
+ int shift;
+
+ if (UVH_RH_GAM_GRU_OVERLAY_CONFIG) {
+ gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG);
+ shift = UVH_RH_GAM_GRU_OVERLAY_CONFIG_BASE_SHFT;
+ mask = UVH_RH_GAM_GRU_OVERLAY_CONFIG_BASE_MASK;
+ } else if (UVH_RH10_GAM_GRU_OVERLAY_CONFIG) {
+ gru.v = uv_read_local_mmr(UVH_RH10_GAM_GRU_OVERLAY_CONFIG);
+ shift = UVH_RH10_GAM_GRU_OVERLAY_CONFIG_BASE_SHFT;
+ mask = UVH_RH10_GAM_GRU_OVERLAY_CONFIG_BASE_MASK;
+ } else {
+ pr_err("UV: GRU unavailable (no MMR)\n");
+ return;
+ }

- gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG);
if (!gru.s.enable) {
- pr_info("UV: GRU disabled\n");
+ pr_info("UV: GRU disabled (by BIOS)\n");
return;
}

@@ -1288,7 +1302,11 @@ static void __init uv_init_hub_info(struct uv_hub_info_s *hi)
/* Show system specific info: */
pr_info("UV: N:%d M:%d m_shift:%d n_lshift:%d\n", hi->n_val, hi->m_val, hi->m_shift, hi->n_lshift);
pr_info("UV: gpa_mask/shift:0x%lx/%d pnode_mask:0x%x apic_pns:%d\n", hi->gpa_mask, hi->gpa_shift, hi->pnode_mask, hi->apic_pnode_shift);
- pr_info("UV: mmr_base/shift:0x%lx/%ld gru_base/shift:0x%lx/%ld\n", hi->global_mmr_base, hi->global_mmr_shift, hi->global_gru_base, hi->global_gru_shift);
+ pr_info("UV: mmr_base/shift:0x%lx/%ld\n", hi->global_mmr_base, hi->global_mmr_shift);
+ if (hi->global_gru_base)
+ pr_info("UV: gru_base/shift:0x%lx/%ld\n",
+ hi->global_gru_base, hi->global_gru_shift);
+
pr_info("UV: gnode_upper:0x%lx gnode_extra:0x%x\n", hi->gnode_upper, hi->gnode_extra);
}