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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2018-08-15 15:10:35 +1000 |
|---|---|---|
| committer | Stewart Smith <stewart@linux.vnet.ibm.com> | 2018-09-13 15:19:36 +1000 |
| commit | 9a83ab711ea3c76919f311cb1c78e051ae59c808 (patch) | |
| tree | 371d0ba0b4980d6ffce013b647d87074ccf953f4 /hw/phb4.c | |
| parent | 0a087154ca4f6759ad1e25c0b3933a9e6caeb456 (diff) | |
| download | skiboot-9a83ab711ea3c76919f311cb1c78e051ae59c808.zip skiboot-9a83ab711ea3c76919f311cb1c78e051ae59c808.tar.gz skiboot-9a83ab711ea3c76919f311cb1c78e051ae59c808.tar.bz2 | |
phb4: Workaround PHB errata with CFG write UR/CA errors
If the PHB encounters a UR or CA status on a CFG write, it will
incorrectly freeze the wrong PE. Instead of using the PE# specified
in the CONFIG_ADDRESS register, it will use the PE# of whatever
MMIO occurred last.
Work around this disabling freeze on such errors
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Tested-By: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Diffstat (limited to 'hw/phb4.c')
| -rw-r--r-- | hw/phb4.c | 6 |
1 files changed, 5 insertions, 1 deletions
@@ -4713,7 +4713,11 @@ static void phb4_init_errors(struct phb4 *p) out_be64(p->regs + 0x0d00, 0xffffffffffffffffull); out_be64(p->regs + 0x0d08, 0x0000000000000000ull); out_be64(p->regs + 0x0d18, 0xffffff0fffffffffull); - out_be64(p->regs + 0x0d28, 0x0000400a00000000ull); + + /* Errata: Clear bit 17, otherwise a CFG write UR/CA will incorrectly + * freeze a "random" PE (whatever last PE did an MMIO) + */ + out_be64(p->regs + 0x0d28, 0x0000000a00000000ull); out_be64(p->regs + 0x0d30, 0xdff7bd05f7ddfff0ull); /* XXX CAPI has diff. value */ out_be64(p->regs + 0x0d40, 0x0000000000000000ull); out_be64(p->regs + 0x0d48, 0x0000000000000000ull); |