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amd64: do not touch low memory in acpi_wakeup_ap() if booted by UEFI

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Reviewed by:	markj
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D31916
This commit is contained in:
Konstantin Belousov committed 2021-09-13 19:51:52 +03:00
1 parent 45feade38e
commit e99255c8a6
1 file changed
+25 -13
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sys/x86/acpica/acpi_wakeup.c
+25 -13
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@@ -164,16 +164,22 @@ acpi_wakeup_cpus(struct acpi_softc *sc)
int cpu;
u_char mpbiosreason;
/* save the current value of the warm-start vector */
mpbioswarmvec = *((uint32_t *)WARMBOOT_OFF);
outb(CMOS_REG, BIOS_RESET);
mpbiosreason = inb(CMOS_DATA);
#ifdef __amd64__
if (!efi_boot) {
#endif
/* save the current value of the warm-start vector */
mpbioswarmvec = *((uint32_t *)WARMBOOT_OFF);
outb(CMOS_REG, BIOS_RESET);
mpbiosreason = inb(CMOS_DATA);
/* setup a vector to our boot code */
*((volatile u_short *)WARMBOOT_OFF) = WARMBOOT_TARGET;
*((volatile u_short *)WARMBOOT_SEG) = sc->acpi_wakephys >> 4;
outb(CMOS_REG, BIOS_RESET);
outb(CMOS_DATA, BIOS_WARM); /* 'warm-start' */
/* setup a vector to our boot code */
*((volatile u_short *)WARMBOOT_OFF) = WARMBOOT_TARGET;
*((volatile u_short *)WARMBOOT_SEG) = sc->acpi_wakephys >> 4;
outb(CMOS_REG, BIOS_RESET);
outb(CMOS_DATA, BIOS_WARM); /* 'warm-start' */
#ifdef __amd64__
}
#endif
/* Wake up each AP. */
for (cpu = 1; cpu < mp_ncpus; cpu++) {
@@ -197,11 +203,17 @@ acpi_wakeup_cpus(struct acpi_softc *sc)
pmap_remap_lowptdi(false);
#endif
/* restore the warmstart vector */
*(uint32_t *)WARMBOOT_OFF = mpbioswarmvec;
#ifdef __amd64__
if (!efi_boot) {
#endif
/* restore the warmstart vector */
*(uint32_t *)WARMBOOT_OFF = mpbioswarmvec;
outb(CMOS_REG, BIOS_RESET);
outb(CMOS_DATA, mpbiosreason);
outb(CMOS_REG, BIOS_RESET);
outb(CMOS_DATA, mpbiosreason);
#ifdef __amd64__
}
#endif
}
#endif