Yazen Ghannam c625dabbf1 x86/amd_nb: Check for invalid SMN reads ... AMD Zen-based systems use a System Management Network (SMN) that provides access to implementation-specific registers. SMN accesses are done indirectly through an index/data pair in PCI config space. The PCI config access may fail and return an error code. This would prevent the "read" value from being updated. However, the PCI config access may succeed, but the return value may be invalid. This is in similar fashion to PCI bad reads, i.e. return all bits set. Most systems will return 0 for SMN addresses that are not accessible. This is in line with AMD convention that unavailable registers are Read-as-Zero/Writes-Ignored. However, some systems will return a "PCI Error Response" instead. This value, along with an error code of 0 from the PCI config access, will confuse callers of the amd_smn_read() function. Check for this condition, clear the return value, and set a proper error code. Fixes: ddfe43cdc0 ("x86/amd_nb: Add SMN and Indirect Data Fabric access for AMD Fam17h") Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20230403164244.471141-1-yazen.ghannam@amd.com		2024-06-05 21:23:34 +02:00
..
acpi	ACPI updates for 6.9-rc1	2024-03-13 11:54:05 -07:00
apic	genirq/cpuhotplug, x86/vector: Prevent vector leak during CPU offline	2024-05-23 21:51:50 +02:00
cpu	Miscellaneous topology parsing fixes:	2024-06-02 09:32:34 -07:00
fpu	ARM:	2024-05-15 14:46:43 -07:00
kprobes	Probes updates for v6.10:	2024-05-17 18:29:30 -07:00
.gitignore
alternative.c	x86/alternatives: Use the correct length when optimizing NOPs	2024-05-17 09:27:06 +02:00
amd_gart_64.c	change alloc_pages name in dma_map_ops to avoid name conflicts	2024-04-25 20:55:53 -07:00
amd_nb.c	x86/amd_nb: Check for invalid SMN reads	2024-06-05 21:23:34 +02:00
aperture_64.c	x86/pci: Use PCI_HEADER_TYPE_* instead of literals	2023-12-01 15:00:43 -06:00
apm_32.c	x86/apm_32: Remove dead function apm_get_battery_status()	2024-02-21 19:38:03 +01:00
asm-offsets_32.c
asm-offsets_64.c
asm-offsets.c	x86/bugs: Rename CONFIG_CALL_DEPTH_TRACKING => CONFIG_MITIGATION_CALL_DEPTH_TRACKING	2024-01-10 10:52:28 +01:00
audit_64.c
bootflag.c
callthunks.c	x86/alternatives: Use a temporary buffer when optimizing NOPs	2024-04-09 18:08:11 +02:00
cet.c
cfi.c	cfi: Flip headers	2023-12-15 16:25:55 -08:00
check.c
cpuid.c
crash_dump_32.c
crash_dump_64.c
crash.c	crash: add a new kexec flag for hotplug support	2024-04-23 14:59:01 +10:00
devicetree.c	x86/of: Change x86_dtb_parse_smp_config() to static	2024-04-03 08:49:56 +02:00
doublefault_32.c
dumpstack_32.c
dumpstack_64.c
dumpstack.c	x86/dumpstack: Use uniform "Oops: " prefix for die() messages	2024-03-27 08:45:19 +01:00
e820.c	x86/e820: Add a new e820 table update helper	2024-04-29 11:15:31 +02:00
early_printk.c
early-quirks.c	x86/pci: Use PCI_HEADER_TYPE_* instead of literals	2023-12-01 15:00:43 -06:00
ebda.c
eisa.c	x86/sev: Skip ROM range scans and validation for SEV-SNP guests	2024-03-26 15:22:35 +01:00
espfix_64.c	x86/fred: No ESPFIX needed when FRED is enabled	2024-01-31 22:01:51 +01:00
fred.c	x86/fred: Add FRED initialization functions	2024-01-31 22:03:32 +01:00
ftrace_32.S
ftrace_64.S
ftrace.c	x86/ftrace: enable dynamic ftrace without CONFIG_MODULES	2024-05-14 00:31:44 -07:00
head32.c	x86/microcode/32: Move early loading after paging enable	2023-10-18 22:15:01 +02:00
head64.c	x86/boot/64: Move 5-level paging global variable assignments back	2024-03-24 05:00:36 +01:00
head_32.S	x86/cleanups changes for v6.10:	2024-05-13 18:21:24 -07:00
head_64.S	x86/cleanups changes for v6.10:	2024-05-13 18:21:24 -07:00
hpet.c	x86/apic/msi: Use DOMAIN_BUS_GENERIC_MSI for HPET/IO-APIC domain search	2024-02-25 18:53:08 +01:00
hw_breakpoint.c
i8237.c
i8253.c
i8259.c	x86/i8259: Skip probing when ACPI/MADT advertises PCAT compatibility	2023-10-27 20:36:49 +02:00
ibt_selftest.S
idt.c	x86/irq: Install posted MSI notification handler	2024-04-30 00:54:42 +02:00
io_delay.c
ioport.c
irq_32.c
irq_64.c	fix missing vmalloc.h includes	2024-04-25 20:55:49 -07:00
irq_work.c
irq.c	x86/irq: Factor out common code for checking pending interrupts	2024-04-30 00:54:43 +02:00
irqflags.S
irqinit.c	x86/fred: Invoke FRED initialization code to enable FRED	2024-01-31 22:03:36 +01:00
itmt.c	arch/x86: Remove now superfluous sentinel elem from ctl_table arrays	2023-10-10 15:22:02 -07:00
jailhouse.c	x86/jailhouse: Use new APIC registration function	2024-02-15 22:07:42 +01:00
jump_label.c
kdebugfs.c
kexec-bzimage64.c	- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames	2024-03-14 17:43:30 -07:00
kgdb.c
ksysfs.c
kvm.c	Linux 6.9-rc3	2024-04-09 09:48:09 +02:00
kvmclock.c	kvmclock: Unexport kvmclock clocksource	2024-02-07 17:05:21 +01:00
ldt.c	x86/bugs: Rename CONFIG_PAGE_TABLE_ISOLATION => CONFIG_MITIGATION_PAGE_TABLE_ISOLATION	2024-01-10 10:52:28 +01:00
machine_kexec_32.c
machine_kexec_64.c	x86/kexec: Fix bug with call depth tracking	2024-06-03 17:19:03 +02:00
Makefile	Kbuild updates for v6.10	2024-05-18 12:39:20 -07:00
mmconf-fam10h_64.c
module.c	arch: make execmem setup available regardless of CONFIG_MODULES	2024-05-14 00:31:44 -07:00
mpparse.c	x86/mpparse: Register APIC address only once	2024-03-23 12:41:48 +01:00
msr.c
nmi_selftest.c
nmi.c	x86/nmi: Upgrade NMI backtrace stall checks & messages	2024-03-26 10:07:59 +01:00
paravirt-spinlocks.c
paravirt.c	x86/paravirt: Remove no longer needed paravirt patching code	2023-12-10 23:34:37 +01:00
pci-dma.c
pcspeaker.c
perf_regs.c
platform-quirks.c
pmem.c
probe_roms.c	x86/sev: Skip ROM range scans and validation for SEV-SNP guests	2024-03-26 15:22:35 +01:00
process_32.c	x86/fpu: Clean up FPU switching in the middle of task switching	2023-10-20 11:24:22 +02:00
process_64.c	x86/cpu: Fix check for RDPKRU in __show_regs()	2024-04-24 14:30:21 +02:00
process.c	Core x86 changes for v6.9:	2024-03-11 19:53:15 -07:00
process.h
ptrace.c
pvclock.c
quirks.c
reboot_fixups_32.c
reboot.c	x86, crash: wrap crash dumping code into crash related ifdefs	2024-02-23 17:48:23 -08:00
relocate_kernel_32.S
relocate_kernel_64.S
resource.c
rethook.c
rtc.c	x86/rtc: Remove unused intel-mid.h	2024-04-03 08:24:48 -07:00
setup_percpu.c	x86/asm: Add DB flag to 32-bit percpu GDT entry	2023-12-20 10:57:51 +01:00
setup.c	The usual shower of singleton fixes and minor series all over MM,	2024-05-19 09:21:03 -07:00
sev_verify_cbit.S	x86/boot: Use 32-bit XOR to clear registers	2024-03-01 12:47:37 +01:00
sev-shared.c	x86/sev: Check for MWAITX and MONITORX opcodes in the #VC handler	2024-04-22 18:38:28 +02:00
sev.c	- Small cleanups and improvements	2024-05-14 09:18:52 -07:00
shstk.c	x86/shstk: Enable shadow stacks for x32	2024-03-22 10:17:11 +01:00
signal_32.c	x86/syscall/compat: Remove ia32_unistd.h	2024-03-22 09:37:09 +01:00
signal_64.c	x86/shstk: Enable shadow stacks for x32	2024-03-22 10:17:11 +01:00
signal.c	rseq: Split out rseq.h from sched.h	2023-12-27 11:49:56 -05:00
smp.c	- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames	2024-03-14 17:43:30 -07:00
smpboot.c	x86/cpu: Switch to new Intel CPU model defines	2024-04-29 10:31:30 +02:00
stacktrace.c
static_call.c	x86/bugs: Rename CONFIG_RETHUNK => CONFIG_MITIGATION_RETHUNK	2024-01-10 10:52:29 +01:00
step.c	x86/msr: Prepare for including <linux/percpu.h> into <asm/msr.h>	2024-03-04 12:01:39 +01:00
sys_ia32.c
sys_x86_64.c	x86/mm: care about shadow stack guard gap during placement	2024-04-25 20:56:28 -07:00
tboot.c
time.c
tls.c
tls.h
trace_clock.c
trace.c
tracepoint.c
traps.c	Core x86 changes for v6.9:	2024-03-11 19:53:15 -07:00
tsc_msr.c	x86/tsc_msr: Switch to new Intel CPU model defines	2024-04-29 10:31:34 +02:00
tsc_sync.c	x86/tsc: Trust initial offset in architectural TSC-adjust MSRs	2024-04-29 23:27:16 +02:00
tsc.c	x86/cpu changes for v6.10:	2024-05-13 18:44:44 -07:00
umip.c
unwind_frame.c
unwind_guess.c
unwind_orc.c
uprobes.c
verify_cpu.S
vm86_32.c
vmcore_info_32.c	crash: split vmcoreinfo exporting code out from crash_core.c	2024-02-23 17:48:22 -08:00
vmcore_info_64.c	crash: split vmcoreinfo exporting code out from crash_core.c	2024-02-23 17:48:22 -08:00
vmlinux.lds.S	x86/build changes for v6.10:	2024-05-13 18:05:08 -07:00
vsmp_64.c	x86/apic: Remove unused phys_pkg_id() callback	2024-02-15 22:07:38 +01:00
x86_init.c	x86/sev: Skip ROM range scans and validation for SEV-SNP guests	2024-03-26 15:22:35 +01:00