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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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0ce6cda2c7
The problem in efi_main was that the idt was cleared before the interrupts were disabled. The UEFI spec states that interrupts aren't used so this shouldn't be too much of a problem. Peripherals however don't necessarily know about this and thus might cause interrupts to happen anyway. Even if ExitBootServices() has been called. This means there is a risk of an interrupt being triggered while the IDT register is nullified and the interrupt bit hasn't been cleared, allowing for a triple fault. This patch disables the interrupt flag, while leaving the existing IDT in place. The CPU won't care about the IDT at all as long as the interrupt bit is off, so it's safe to leave it in place as nothing will ever happen to it. [ Removed the now unused 'idt' variable - Matt ] Signed-off-by: Bart Kuivenhoven <bemk@redhat.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com> |
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| .. | ||
| .gitignore | ||
| cmdline.c | ||
| early_serial_console.c | ||
| eboot.c | ||
| eboot.h | ||
| efi_stub_32.S | ||
| efi_stub_64.S | ||
| head_32.S | ||
| head_64.S | ||
| Makefile | ||
| misc.c | ||
| misc.h | ||
| mkpiggy.c | ||
| string.c | ||
| vmlinux.lds.S | ||