diff options
| author | Anup Patel <apatel@ventanamicro.com> | 2023-11-21 13:22:17 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2023-11-26 16:15:08 +0300 |
| commit | b70d6285f0f7cbb84619ba1758bb0c6d7620eaef (patch) | |
| tree | 29ad2b1dfc380e5715136bf27e21682fd5be5c50 /lib/utils/ipi/aclint_mswi.c | |
| parent | f520256d03da84e7ff8bddd084ef873192f46304 (diff) | |
| download | opensbi-b70d6285f0f7cbb84619ba1758bb0c6d7620eaef.tar.xz | |
lib: sbi: Allow relaxed MMIO writes in device ipi_clear() callback
Currently, there are no barriers before or after the ipi_clear()
device callback which forces ipi_clear() device callback to always
use non-relaxed MMIO writes.
Instead of above, we use wmb() in after the ipi_clear() device
callback which pairs with the wmb() done before the ipi_send()
device callback. This also allows device ipi_clear() callback
to use relaxed MMIO writes.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reported-by: Bo Gan <ganboing@gmail.com>
Diffstat (limited to 'lib/utils/ipi/aclint_mswi.c')
| -rw-r--r-- | lib/utils/ipi/aclint_mswi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/utils/ipi/aclint_mswi.c b/lib/utils/ipi/aclint_mswi.c index bfd6a45..4ae6bb1 100644 --- a/lib/utils/ipi/aclint_mswi.c +++ b/lib/utils/ipi/aclint_mswi.c @@ -61,7 +61,7 @@ static void mswi_ipi_clear(u32 hart_index) /* Clear ACLINT IPI */ msip = (void *)mswi->addr; - writel(0, &msip[sbi_hartindex_to_hartid(hart_index) - + writel_relaxed(0, &msip[sbi_hartindex_to_hartid(hart_index) - mswi->first_hartid]); } |