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| author | Mole Shang <135e2@135e2.dev> | 2024-02-16 10:20:27 +0800 |
|---|---|---|
| committer | Mole Shang <135e2@135e2.dev> | 2024-02-16 10:20:27 +0800 |
| commit | a98c56a811142e5ede3332a7a444cca45f628769 (patch) | |
| tree | c93ff7090da7b6ef911932be283818c2f6a03784 /kernel/start.c | |
| parent | 0d65be5d1d880afafbf08c2adb605cf9f72216e2 (diff) | |
| parent | 99015f3a985b2fd051606636743a2a2969b216e8 (diff) | |
| download | xv6-labs-a98c56a811142e5ede3332a7a444cca45f628769.tar.gz xv6-labs-a98c56a811142e5ede3332a7a444cca45f628769.tar.bz2 xv6-labs-a98c56a811142e5ede3332a7a444cca45f628769.zip | |
Merge branch 'lock' into thread
Conflicts:
.gitignore
Makefile
conf/lab.mk
Diffstat (limited to 'kernel/start.c')
| -rw-r--r-- | kernel/start.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/start.c b/kernel/start.c index e16f18a..bf03bc0 100644 --- a/kernel/start.c +++ b/kernel/start.c @@ -38,6 +38,11 @@ start() w_mideleg(0xffff); w_sie(r_sie() | SIE_SEIE | SIE_STIE | SIE_SSIE); +#ifdef KCSAN + // allow supervisor to read cycle counter register + w_mcounteren(r_mcounteren()|0x3); +#endif + // configure Physical Memory Protection to give supervisor mode // access to all of physical memory. w_pmpaddr0(0x3fffffffffffffull); |