| Message ID | 20180405121159.84241-1-andriy.shevchenko@linux.intel.com |
|---|---|
| State | Superseded |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
| Series | [v1] x86/PCI: Make pci=earlydump output neat | expand |
On Thu, Apr 05, 2018 at 03:11:59PM +0300, Andy Shevchenko wrote: > Currently the early dump of PCI configuration space looks quite unhelpful, e.g. > > [ 0.000000] 60: > [ 0.000000] 00 > [ 0.000000] 00 > [ 0.000000] 00 > [ 0.000000] 00 > [ 0.000000] 00 > [ 0.000000] 00 > [ 0.000000] 00 > [ 0.000000] 00 > [ 0.000000] 00 > [ 0.000000] 00 > [ 0.000000] 00 > [ 0.000000] 00 > [ 0.000000] 00 > [ 0.000000] 00 > [ 0.000000] 00 > [ 0.000000] 00 > [ 0.000000] > > which makes really hard to get anything out of this. Convert the function to > use print_hex_dump() to make output neat. > > In the result we will have > > [ 0.000000] 00000060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > > which is much, much better. > > Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> > --- > arch/x86/pci/early.c | 19 +++++-------------- > 1 file changed, 5 insertions(+), 14 deletions(-) > > diff --git a/arch/x86/pci/early.c b/arch/x86/pci/early.c > index f0114007e915..53a87692d687 100644 > --- a/arch/x86/pci/early.c > +++ b/arch/x86/pci/early.c > @@ -59,24 +59,15 @@ int early_pci_allowed(void) > > void early_dump_pci_device(u8 bus, u8 slot, u8 func) > { > + u32 value[256 / 4]; > int i; > - int j; > - u32 val; > > - printk(KERN_INFO "pci 0000:%02x:%02x.%d config space:", > - bus, slot, func); > + pr_info("pci 0000:%02x:%02x.%d config space:\n", bus, slot, func); > > - for (i = 0; i < 256; i += 4) { > - if (!(i & 0x0f)) > - printk("\n %02x:",i); > + for (i = 0; i < 256; i += 4) > + value[i/4] = read_pci_config(bus, slot, func, i); Please be consistent with your use of whitespace: 256 / 4 vs. i/4. Other than that looks good and certainly is an improvement, Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
diff --git a/arch/x86/pci/early.c b/arch/x86/pci/early.c index f0114007e915..53a87692d687 100644 --- a/arch/x86/pci/early.c +++ b/arch/x86/pci/early.c @@ -59,24 +59,15 @@ int early_pci_allowed(void) void early_dump_pci_device(u8 bus, u8 slot, u8 func) { + u32 value[256 / 4]; int i; - int j; - u32 val; - printk(KERN_INFO "pci 0000:%02x:%02x.%d config space:", - bus, slot, func); + pr_info("pci 0000:%02x:%02x.%d config space:\n", bus, slot, func); - for (i = 0; i < 256; i += 4) { - if (!(i & 0x0f)) - printk("\n %02x:",i); + for (i = 0; i < 256; i += 4) + value[i/4] = read_pci_config(bus, slot, func, i); - val = read_pci_config(bus, slot, func, i); - for (j = 0; j < 4; j++) { - printk(" %02x", val & 0xff); - val >>= 8; - } - } - printk("\n"); + print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 1, value, 256, false); } void early_dump_pci_devices(void)
Currently the early dump of PCI configuration space looks quite unhelpful, e.g. [ 0.000000] 60: [ 0.000000] 00 [ 0.000000] 00 [ 0.000000] 00 [ 0.000000] 00 [ 0.000000] 00 [ 0.000000] 00 [ 0.000000] 00 [ 0.000000] 00 [ 0.000000] 00 [ 0.000000] 00 [ 0.000000] 00 [ 0.000000] 00 [ 0.000000] 00 [ 0.000000] 00 [ 0.000000] 00 [ 0.000000] 00 [ 0.000000] which makes really hard to get anything out of this. Convert the function to use print_hex_dump() to make output neat. In the result we will have [ 0.000000] 00000060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 which is much, much better. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> --- arch/x86/pci/early.c | 19 +++++-------------- 1 file changed, 5 insertions(+), 14 deletions(-)