iommu/amd: Fix extended features logging

BugLink: https://bugs.launchpad.net/bugs/1938340
[ Upstream commit 4b21a503adf597773e4b37db05db0e9b16a81d53 ]

print_iommu_info prints the EFR register and then the decoded list of
features on a separate line:

pci 0000:00:00.2: AMD-Vi: Extended features (0x206d73ef22254ade):
 PPR X2APIC NX GT IA GA PC GA_vAPIC

The second line is emitted via 'pr_cont', which causes it to have a
different ('warn') loglevel compared to the previous line ('info').

Commit 9a295ff0ffc9 attempted to rectify this by removing the newline
from the pci_info format string, but this doesn't work, as pci_info
calls implicitly append a newline anyway.

Printing the decoded features on the same line would make it quite long.
Instead, change pci_info() to pr_info() to omit PCI bus location info,
which is also shown in the preceding message. This results in:

pci 0000:00:00.2: AMD-Vi: Found IOMMU cap 0x40
AMD-Vi: Extended features (0x206d73ef22254ade): PPR X2APIC NX GT IA GA PC GA_vAPIC
AMD-Vi: Interrupt remapping enabled

Fixes: 9a295ff0ffc9 ("iommu/amd: Print extended features in one line to fix divergent log levels")
Link: https://lore.kernel.org/lkml/alpine.LNX.2.20.13.2104112326460.11104@monopod.intra.ispras.ru
Signed-off-by: Alexander Monakov <amonakov@ispras.ru>
Cc: Paul Menzel <pmenzel@molgen.mpg.de>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Cc: iommu@lists.linux-foundation.org
Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>
Link: https://lore.kernel.org/r/20210504102220.1793-1-amonakov@ispras.ru
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>

diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c
index 735ad74e2c8f3ffea9a79fd051325d16ce808e5d..849560c90073562c6e66cef52dd368322a65c510 100644 (file)
--- a/drivers/iommu/amd/init.c
+++ b/drivers/iommu/amd/init.c
@@ -1909,8 +1909,8 @@ static void print_iommu_info(void)
                pci_info(pdev, "Found IOMMU cap 0x%hx\n", iommu->cap_ptr);
 
                if (iommu->cap & (1 << IOMMU_CAP_EFR)) {
-                       pci_info(pdev, "Extended features (%#llx):",
-                                iommu->features);
+                       pr_info("Extended features (%#llx):", iommu->features);
+
                        for (i = 0; i < ARRAY_SIZE(feat_str); ++i) {
                                if (iommu_feature(iommu, (1ULL << i)))
                                        pr_cont(" %s", feat_str[i]);