AuxXxilium/linux_dsm_epyc7002
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fix nmi_watchdog=2 bootup hang

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wrmsrl() is broken, dropping the upper 32bits of the value to be
written. This broke the NMI watchdog on AMD hardware. (and it
probably broke other code too.)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Björn Steinbrink 2007-06-25 23:04:37 +02:00 committed by Linus Torvalds
parent 189548642c
commit b9e3614f44
1 changed files with 1 additions and 1 deletions
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include/asm-i386/paravirt.h
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@ -539,7 +539,7 @@ static inline int paravirt_write_msr(unsigned msr, unsigned low, unsigned high)
val = paravirt_read_msr(msr, &_err); \
} while(0)
#define wrmsrl(msr,val) ((void)paravirt_write_msr(msr, val, 0))
#define wrmsrl(msr,val) wrmsr(msr, (u32)((u64)(val)), ((u64)(val))>>32)
#define wrmsr_safe(msr,a,b) paravirt_write_msr(msr, a, b)
/* rdmsr with exception handling */