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powerpc/pseries: Add firmware details to the hardware description

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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 <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220930082709.55830-6-mpe@ellerman.id.au
This commit is contained in:
Michael Ellerman 2022-09-30 18:27:09 +10:00
parent 37576cb096
commit 8535a1afff
1 changed files with 30 additions and 0 deletions
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30
arch/powerpc/platforms/pseries/setup.c
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@ -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();