[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [RFC PATCH 04/12] hvmloader: add ACPI enabling for Q35
In order to turn on ACPI for OS, we need to write a chipset-specific value to SMI_CMD register (sort of imitation of the APM->ACPI switch on real systems). Modify acpi_enable_sci() function to support both i440 and Q35 emulation. Signed-off-by: Alexey Gerasimenko <x1917x@xxxxxxxxx> --- tools/firmware/hvmloader/hvmloader.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/tools/firmware/hvmloader/hvmloader.c b/tools/firmware/hvmloader/hvmloader.c index f603f68ded..070698440e 100644 --- a/tools/firmware/hvmloader/hvmloader.c +++ b/tools/firmware/hvmloader/hvmloader.c @@ -257,9 +257,16 @@ static const struct bios_config *detect_bios(void) static void acpi_enable_sci(void) { uint8_t pm1a_cnt_val; + uint8_t acpi_enable_val; -#define PIIX4_SMI_CMD_IOPORT 0xb2 +#define SMI_CMD_IOPORT 0xb2 #define PIIX4_ACPI_ENABLE 0xf1 +#define ICH9_ACPI_ENABLE 0x02 + + if (get_pc_machine_type() == MACHINE_TYPE_Q35) + acpi_enable_val = ICH9_ACPI_ENABLE; + else + acpi_enable_val = PIIX4_ACPI_ENABLE; /* * PIIX4 emulation in QEMU has SCI_EN=0 by default. We have no legacy @@ -267,7 +274,7 @@ static void acpi_enable_sci(void) */ pm1a_cnt_val = inb(ACPI_PM1A_CNT_BLK_ADDRESS_V1); if ( !(pm1a_cnt_val & ACPI_PM1C_SCI_EN) ) - outb(PIIX4_SMI_CMD_IOPORT, PIIX4_ACPI_ENABLE); + outb(SMI_CMD_IOPORT, acpi_enable_val); pm1a_cnt_val = inb(ACPI_PM1A_CNT_BLK_ADDRESS_V1); BUG_ON(!(pm1a_cnt_val & ACPI_PM1C_SCI_EN)); -- 2.11.0 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel
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