Date: Tue, 28 Feb 2023 10:14:13 GMT From: =?utf-8?Q?Corvin=20K=C3=B6hne?= <corvink@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: bd8366500e15 - stable/13 - bhyve: add emulation for the qemu fwcfg selector port Message-ID: <202302281014.31SAEDvN013819@gitrepo.freebsd.org>
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The branch stable/13 has been updated by corvink: URL: https://cgit.FreeBSD.org/src/commit/?id=bd8366500e15e6aa840e80d21661d5f3bf4d835e commit bd8366500e15e6aa840e80d21661d5f3bf4d835e Author: Corvin Köhne <corvink@FreeBSD.org> AuthorDate: 2021-08-11 07:59:16 +0000 Commit: Corvin Köhne <corvink@FreeBSD.org> CommitDate: 2023-02-28 10:04:36 +0000 bhyve: add emulation for the qemu fwcfg selector port The selector port is used to select the desired fwcfg item. Reviewed by: markj MFC after: 1 week Sponsored by: Beckhoff Automation GmbH & Co. KG Differential Revision: https://reviews.freebsd.org/D38332 (cherry picked from commit 151d8131a817e7a6a629e9bb7fde4d7a158e5211) --- usr.sbin/bhyve/qemu_fwcfg.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/usr.sbin/bhyve/qemu_fwcfg.c b/usr.sbin/bhyve/qemu_fwcfg.c index 5d3070abf285..dec3fa83c493 100644 --- a/usr.sbin/bhyve/qemu_fwcfg.c +++ b/usr.sbin/bhyve/qemu_fwcfg.c @@ -29,8 +29,33 @@ #define QEMU_FWCFG_DATA_PORT_FLAGS \ IOPORT_F_INOUT /* QEMU v2.4+ ignores writes */ +#define QEMU_FWCFG_ARCHITECTURE_MASK 0x0001 +#define QEMU_FWCFG_INDEX_MASK 0x3FFF + +#define QEMU_FWCFG_SELECT_READ 0 +#define QEMU_FWCFG_SELECT_WRITE 1 + +#define QEMU_FWCFG_ARCHITECTURE_GENERIC 0 +#define QEMU_FWCFG_ARCHITECTURE_SPECIFIC 1 + +#pragma pack(1) + +union qemu_fwcfg_selector { + struct { + uint16_t index : 14; + uint16_t writeable : 1; + uint16_t architecture : 1; + }; + uint16_t bits; +}; + +#pragma pack() + struct qemu_fwcfg_softc { struct acpi_device *acpi_dev; + + uint32_t data_offset; + union qemu_fwcfg_selector selector; }; static struct qemu_fwcfg_softc fwcfg_sc; @@ -40,6 +65,20 @@ qemu_fwcfg_selector_port_handler(struct vmctx *const ctx __unused, const int in, const int port __unused, const int bytes, uint32_t *const eax, void *const arg __unused) { + if (bytes != sizeof(uint16_t)) { + warnx("%s: invalid size (%d) of IO port access", __func__, + bytes); + return (-1); + } + + if (in) { + *eax = htole16(fwcfg_sc.selector.bits); + return (0); + } + + fwcfg_sc.data_offset = 0; + fwcfg_sc.selector.bits = le16toh(*eax); + return (0); }
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