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| author | Michael Ellerman <mpe@ellerman.id.au> | 2018-01-16 21:20:05 +1100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-01-17 23:30:20 +1100 |
| commit | fd6e440f20b1a4304553775fc55938848ff617c9 (patch) | |
| tree | fbc2ced1ac72f2e89dd5b565c81d5658c749f209 /arch/powerpc/kernel/setup_64.c | |
| parent | 349524bc0da698ec77f2057cf4a4948eb6349265 (diff) | |
| download | linux-fd6e440f20b1a4304553775fc55938848ff617c9.tar.gz linux-fd6e440f20b1a4304553775fc55938848ff617c9.tar.bz2 linux-fd6e440f20b1a4304553775fc55938848ff617c9.zip | |
powerpc/64s: Wire up cpu_show_meltdown()
The recent commit 87590ce6e373 ("sysfs/cpu: Add vulnerability folder")
added a generic folder and set of files for reporting information on
CPU vulnerabilities. One of those was for meltdown:
/sys/devices/system/cpu/vulnerabilities/meltdown
This commit wires up that file for 64-bit Book3S powerpc.
For now we default to "Vulnerable" unless the RFI flush is enabled.
That may not actually be true on all hardware, further patches will
refine the reporting based on the CPU/platform etc. But for now we
default to being pessimists.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/setup_64.c')
| -rw-r--r-- | arch/powerpc/kernel/setup_64.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index 491be4179ddd..624d2a62d05d 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -901,4 +901,12 @@ void __init setup_rfi_flush(enum l1d_flush_type types, bool enable) if (!no_rfi_flush) rfi_flush_enable(enable); } + +ssize_t cpu_show_meltdown(struct device *dev, struct device_attribute *attr, char *buf) +{ + if (rfi_flush) + return sprintf(buf, "Mitigation: RFI Flush\n"); + + return sprintf(buf, "Vulnerable\n"); +} #endif /* CONFIG_PPC_BOOK3S_64 */ |