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| author | Michael Ellerman <mpe@ellerman.id.au> | 2022-09-30 11:27:09 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-09-30 11:35:53 +0300 |
| commit | 8535a1afff0f4f568eb589f3795a930ef3d483b0 (patch) | |
| tree | d76c5fb89445319897384f718c308eb8e475ba61 /arch/powerpc/platforms | |
| parent | 37576cb0961fe9d3318c17e4e4bc5ecebf38e9bb (diff) | |
| download | linux-8535a1afff0f4f568eb589f3795a930ef3d483b0.tar.xz | |
powerpc/pseries: Add firmware details to the hardware description
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
Diffstat (limited to 'arch/powerpc/platforms')
| -rw-r--r-- | arch/powerpc/platforms/pseries/setup.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index 5e44c65a032c..8ef3270515a9 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(); |