The patch titled
x86: uv: introduce a means to translate from gpa -> socket_paddr
has been added to the -mm tree. Its filename is
x86-uv-introduce-a-means-to-translate-from-gpa-socket_paddr.patch
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Subject: x86: uv: introduce a means to translate from gpa -> socket_paddr
From: Robin Holt <holt@xxxxxxx>
The UV BIOS has been updated to implement some of our interface
functionality differently than originally expected. These patches update
the kernel to the bios implementation and include a few minor bug fixes
which prevent us from doing significant testing on real hardware.
This patch:
For SGI UV systems, translate from a global physical address back to a
socket physical address. This does nothing to ensure the socket physical
address is actually addressable by the kernel. That is the responsibility
of the user of the function.
Signed-off-by: Robin Holt <holt@xxxxxxx>
Cc: Jack Steiner <steiner@xxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/include/asm/uv/uv_hub.h | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff -puN arch/x86/include/asm/uv/uv_hub.h~x86-uv-introduce-a-means-to-translate-from-gpa-socket_paddr arch/x86/include/asm/uv/uv_hub.h
--- a/arch/x86/include/asm/uv/uv_hub.h~x86-uv-introduce-a-means-to-translate-from-gpa-socket_paddr
+++ a/arch/x86/include/asm/uv/uv_hub.h
@@ -232,6 +232,19 @@ static inline unsigned long uv_gpa(void
return uv_soc_phys_ram_to_gpa(__pa(v));
}
+/* UV global physical address --> socket phys RAM */
+static inline unsigned long uv_gpa_to_soc_phys_ram(unsigned long gpa)
+{
+ unsigned long paddr = gpa & uv_hub_info->gpa_mask;
+ unsigned long remap_base = uv_hub_info->lowmem_remap_base;
+ unsigned long remap_top = uv_hub_info->lowmem_remap_top;
+
+ if (paddr >= remap_base && paddr < remap_base + remap_top)
+ paddr -= remap_base;
+ return paddr;
+}
+
+
/* gnode -> pnode */
static inline unsigned long uv_gpa_to_gnode(unsigned long gpa)
{
_
Patches currently in -mm which might be from holt@xxxxxxx are
x86-uv-introduce-a-means-to-translate-from-gpa-socket_paddr.patch
x86-uv-xpc-needs-to-provide-an-abstraction-for-uv_gpa.patch
x86-uv-introduce-uv_gpa_is_mmr.patch
x86-uv-implement-a-gru_read_gpa-kernel-function.patch
x86-uv-update-xpc-to-handle-updated-bios-interface.patch
x86-uv-xpc-null-deref-when-mesq-becomes-empty.patch
x86-uv-xpc_make_first_contact-hang-due-to-not-accepting-active-state.patch
x86-uv-xpc-receive-message-reuse-triggers-invalid-bug_on.patch
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