Add firmware version details to the hardware description, which is
printed at boot and in case of an oops.
Use /hypervisor if we find it, though currently it only exists if we're
running under qemu.
Look for "ibm,powervm-partition" which is specified in PAPR+ v2.11 and
tells us we're running under PowerVM.
Failing that look for "ibm,fw-net-version" which is seen on PowerVM
going back to at least Power6.
eg: Hardware name: ... of:'IBM,FW860.42 (SV860_138)' hv:'phyp'
Signed-off-by: Michael Ellerman <m...@ellerman.id.au>
---
arch/powerpc/platforms/pseries/setup.c | 30 ++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
v2: Look for "ibm,powervm-partition" as suggested by Nathan.
Use of_property_read_string().
diff --git a/arch/powerpc/platforms/pseries/setup.c
b/arch/powerpc/platforms/pseries/setup.c
index 5e44c65a032c..83b047db35da 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -41,6 +41,7 @@
#include <linux/of_pci.h>
#include <linux/memblock.h>
#include <linux/swiotlb.h>
+#include <linux/seq_buf.h>
#include <asm/mmu.h>
#include <asm/processor.h>
@@ -1011,6 +1012,33 @@ static void __init pSeries_cmo_feature_init(void)
pr_debug(" <- fw_cmo_feature_init()\n");
}
+static void __init pseries_add_hw_description(void)
+{
+ struct device_node *dn;
+ const char *s;
+
+ dn = of_find_node_by_path("/openprom");
+ if (dn) {
+ if (of_property_read_string(dn, "model", &s) == 0)
+ seq_buf_printf(&ppc_hw_desc, "of:'%s' ", s);
+
+ of_node_put(dn);
+ }
+
+ dn = of_find_node_by_path("/hypervisor");
+ if (dn) {
+ if (of_property_read_string(dn, "compatible", &s) == 0)
+ seq_buf_printf(&ppc_hw_desc, "hv:'%s' ", s);
+
+ of_node_put(dn);
+ return;
+ }
+
+ if (of_property_read_bool(of_root, "ibm,powervm-partition") ||
+ of_property_read_bool(of_root, "ibm,fw-net-version"))
+ seq_buf_printf(&ppc_hw_desc, "hv:'phyp' ");
+}
+
/*
* Early initialization. Relocation is on but do not reference unbolted pages
*/
@@ -1018,6 +1046,8 @@ static void __init pseries_init(void)
{
pr_debug(" -> pseries_init()\n");
+ pseries_add_hw_description();
+
#ifdef CONFIG_HVC_CONSOLE
if (firmware_has_feature(FW_FEATURE_LPAR))
hvc_vio_init_early();
--
2.37.3
