From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45559) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aRRr3-0001Vf-1s for qemu-devel@nongnu.org; Thu, 04 Feb 2016 16:54:22 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aRRr0-0005q0-Rg for qemu-devel@nongnu.org; Thu, 04 Feb 2016 16:54:20 -0500 Received: from mx1.redhat.com ([209.132.183.28]:47064) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aRRr0-0005pv-Kl for qemu-devel@nongnu.org; Thu, 04 Feb 2016 16:54:18 -0500 Date: Thu, 4 Feb 2016 23:54:13 +0200 From: "Michael S. Tsirkin" Message-ID: <1454612376-7072-49-git-send-email-mst@redhat.com> References: <1454612376-7072-1-git-send-email-mst@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1454612376-7072-1-git-send-email-mst@redhat.com> Subject: [Qemu-devel] [PULL 48/49] i386: populate floppy drive information in DSDT List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Peter Maydell , Eduardo Habkost , Roman Kagan , Paolo Bonzini , Igor Mammedov , Richard Henderson From: Roman Kagan On x86-based systems Linux determines the presence and the type of floppy drives via a query of a CMOS field. So does SeaBIOS when populating the return data for int 0x13 function 0x08. However Windows doesn't do it. Instead, it requests this information from BIOS via int 0x13/0x08 or through ACPI objects _FDE (Floppy Drive Enumerate) and _FDI (Floppy Drive Information) of the floppy controller object. On UEFI systems only ACPI-based detection is supported. QEMU doesn't provide those objects in its ACPI tables and as a result floppy drives aren't invisible to Windows on UEFI/OVMF. This patch adds those objects to the floppy controller in DSDT, populating them with the information from respective QEMU objects. Signed-off-by: Roman Kagan Signed-off-by: Igor Mammedov Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/i386/acpi-build.c | 61 +++++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 58 insertions(+), 3 deletions(-) diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index 842c731..caa2e87 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -37,6 +37,7 @@ #include "hw/acpi/bios-linker-loader.h" #include "hw/loader.h" #include "hw/isa/isa.h" +#include "hw/block/fdc.h" #include "hw/acpi/memory_hotplug.h" #include "hw/mem/nvdimm.h" #include "sysemu/tpm.h" @@ -1227,10 +1228,47 @@ static void build_hpet_aml(Aml *table) aml_append(table, scope); } -static Aml *build_fdc_device_aml(void) +static Aml *build_fdinfo_aml(int idx, uint8_t type, uint8_t cylinders, + uint8_t heads, uint8_t sectors) +{ + Aml *dev, *fdi; + + dev = aml_device("FLP%c", 'A' + idx); + + aml_append(dev, aml_name_decl("_ADR", aml_int(idx))); + + fdi = aml_package(0x10); + aml_append(fdi, aml_int(idx)); /* Drive Number */ + aml_append(fdi, + aml_int(cmos_get_fd_drive_type(type))); /* Device Type */ + aml_append(fdi, + aml_int(cylinders - 1)); /* Maximum Cylinder Number */ + aml_append(fdi, aml_int(sectors)); /* Maximum Sector Number */ + aml_append(fdi, aml_int(heads - 1)); /* Maximum Head Number */ + /* SeaBIOS returns the below values for int 0x13 func 0x08 regardless of + * the drive type, so shall we */ + aml_append(fdi, aml_int(0xAF)); /* disk_specify_1 */ + aml_append(fdi, aml_int(0x02)); /* disk_specify_2 */ + aml_append(fdi, aml_int(0x25)); /* disk_motor_wait */ + aml_append(fdi, aml_int(0x02)); /* disk_sector_siz */ + aml_append(fdi, aml_int(0x12)); /* disk_eot */ + aml_append(fdi, aml_int(0x1B)); /* disk_rw_gap */ + aml_append(fdi, aml_int(0xFF)); /* disk_dtl */ + aml_append(fdi, aml_int(0x6C)); /* disk_formt_gap */ + aml_append(fdi, aml_int(0xF6)); /* disk_fill */ + aml_append(fdi, aml_int(0x0F)); /* disk_head_sttl */ + aml_append(fdi, aml_int(0x08)); /* disk_motor_strt */ + + aml_append(dev, aml_name_decl("_FDI", fdi)); + return dev; +} + +static Aml *build_fdc_device_aml(ISADevice *fdc) { + int i; Aml *dev; Aml *crs; + uint32_t fde_buf[5] = {0, 0, 0, 0, cpu_to_le32(0x2)}; dev = aml_device("FDC0"); aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0700"))); @@ -1243,6 +1281,21 @@ static Aml *build_fdc_device_aml(void) aml_dma(AML_COMPATIBILITY, AML_NOTBUSMASTER, AML_TRANSFER8, 2)); aml_append(dev, aml_name_decl("_CRS", crs)); + for (i = 0; i < MAX_FD; i++) { + uint8_t type = isa_fdc_get_drive_type(fdc, i); + + if (type < FLOPPY_DRIVE_TYPE_NONE) { + uint8_t cylinders, heads, sectors; + + fde_buf[i] = cpu_to_le32(0x1); + isa_fdc_get_drive_geometry(fdc, i, &cylinders, &heads, §ors); + aml_append(dev, + build_fdinfo_aml(i, type, cylinders, heads, sectors)); + } + } + aml_append(dev, aml_name_decl("_FDE", + aml_buffer(sizeof(fde_buf), (uint8_t *) fde_buf))); + return dev; } @@ -1387,13 +1440,15 @@ static Aml *build_com_device_aml(uint8_t uid) static void build_isa_devices_aml(Aml *table) { + ISADevice *fdc = pc_find_fdc0(); + Aml *scope = aml_scope("_SB.PCI0.ISA"); aml_append(scope, build_rtc_device_aml()); aml_append(scope, build_kbd_device_aml()); aml_append(scope, build_mouse_device_aml()); - if (!!pc_find_fdc0()) { - aml_append(scope, build_fdc_device_aml()); + if (!!fdc) { + aml_append(scope, build_fdc_device_aml(fdc)); } aml_append(scope, build_lpt_device_aml()); aml_append(scope, build_com_device_aml(1)); -- MST