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| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2021-06-20 14:58:36 +0300 |
|---|---|---|
| committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2021-10-15 12:23:55 +0000 |
| commit | 7da871ef497e66cd62d4d8bea142cd438bef204b (patch) | |
| tree | dd702e7f595915a3ca80d6205198f91fc5433ac9 /src/cpu/x86/lapic | |
| parent | 90f54c9b8f2ae6d1b222bdcdda9c69f29fab2229 (diff) | |
cpu/x86/lapic: Do not set read-only bits in LVTx
The bits REMOTE_IRR and SEND_PENDING are documented as read-only,
and reserved bits should not be modified either.
Change-Id: I6bcb9eb990debe169340a0bfe662158b62a8f4dc
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55700
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Diffstat (limited to 'src/cpu/x86/lapic')
| -rw-r--r-- | src/cpu/x86/lapic/lapic.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/src/cpu/x86/lapic/lapic.c b/src/cpu/x86/lapic/lapic.c index a346bc1b14..58e45248ab 100644 --- a/src/cpu/x86/lapic/lapic.c +++ b/src/cpu/x86/lapic/lapic.c @@ -52,16 +52,12 @@ static void lapic_virtual_wire_mode_init(void) lapic_update32(LAPIC_SPIV, ~LAPIC_VECTOR_MASK, LAPIC_SPIV_ENABLE); /* Put the local APIC in virtual wire mode */ - uint32_t mask = LAPIC_LVT_MASKED | LAPIC_LVT_LEVEL_TRIGGER | LAPIC_LVT_REMOTE_IRR | - LAPIC_INPUT_POLARITY | LAPIC_SEND_PENDING | LAPIC_LVT_RESERVED_1 | + uint32_t mask = LAPIC_LVT_MASKED | LAPIC_LVT_LEVEL_TRIGGER | LAPIC_INPUT_POLARITY | LAPIC_DELIVERY_MODE_MASK; - lapic_update32(LAPIC_LVT0, ~mask, LAPIC_LVT_REMOTE_IRR | LAPIC_SEND_PENDING | - LAPIC_DELIVERY_MODE_EXTINT); - - lapic_update32(LAPIC_LVT1, ~mask, LAPIC_LVT_REMOTE_IRR | LAPIC_SEND_PENDING | - LAPIC_DELIVERY_MODE_NMI); + lapic_update32(LAPIC_LVT0, ~mask, LAPIC_DELIVERY_MODE_EXTINT); + lapic_update32(LAPIC_LVT1, ~mask, LAPIC_DELIVERY_MODE_NMI); } void setup_lapic(void) |