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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=148.163.156.1; envelope-from=jrossi@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1727398480048116600 Content-Type: text/plain; charset="utf-8" From: Jared Rossi Remove panic-on-error from DASD IPL specific functions so that error recove= ry may be possible in the future. Functions that would previously panic now provide a return code. Signed-off-by: Jared Rossi Reviewed-by: Thomas Huth --- pc-bios/s390-ccw/dasd-ipl.h | 2 +- pc-bios/s390-ccw/dasd-ipl.c | 66 ++++++++++++++++++++----------------- 2 files changed, 37 insertions(+), 31 deletions(-) diff --git a/pc-bios/s390-ccw/dasd-ipl.h b/pc-bios/s390-ccw/dasd-ipl.h index c394828906..eb1898c84a 100644 --- a/pc-bios/s390-ccw/dasd-ipl.h +++ b/pc-bios/s390-ccw/dasd-ipl.h @@ -11,6 +11,6 @@ #ifndef DASD_IPL_H #define DASD_IPL_H =20 -void dasd_ipl(SubChannelId schid, uint16_t cutype); +int dasd_ipl(SubChannelId schid, uint16_t cutype); =20 #endif /* DASD_IPL_H */ diff --git a/pc-bios/s390-ccw/dasd-ipl.c b/pc-bios/s390-ccw/dasd-ipl.c index 99c0b93083..cd4fb884d6 100644 --- a/pc-bios/s390-ccw/dasd-ipl.c +++ b/pc-bios/s390-ccw/dasd-ipl.c @@ -111,38 +111,29 @@ static void make_readipl(void) ccwIplRead->count =3D 0x18; /* Read 0x18 bytes of data */ } =20 -static void run_readipl(SubChannelId schid, uint16_t cutype) +static int run_readipl(SubChannelId schid, uint16_t cutype) { - if (do_cio(schid, cutype, 0x00, CCW_FMT0)) { - panic("dasd-ipl: Failed to run Read IPL channel program\n"); - } + return do_cio(schid, cutype, 0x00, CCW_FMT0); } =20 /* * The architecture states that IPL1 data should consist of a psw followed= by * format-0 READ and TIC CCWs. Let's sanity check. */ -static void check_ipl1(void) +static bool check_ipl1(void) { Ccw0 *ccwread =3D (Ccw0 *)0x08; Ccw0 *ccwtic =3D (Ccw0 *)0x10; =20 - if (ccwread->cmd_code !=3D CCW_CMD_DASD_READ || - ccwtic->cmd_code !=3D CCW_CMD_TIC) { - panic("dasd-ipl: IPL1 data invalid. Is this disk really bootable?\= n"); - } + return (ccwread->cmd_code =3D=3D CCW_CMD_DASD_READ && + ccwtic->cmd_code =3D=3D CCW_CMD_TIC); } =20 -static void check_ipl2(uint32_t ipl2_addr) +static bool check_ipl2(uint32_t ipl2_addr) { Ccw0 *ccw =3D u32toptr(ipl2_addr); =20 - if (ipl2_addr =3D=3D 0x00) { - panic("IPL2 address invalid. Is this disk really bootable?\n"); - } - if (ccw->cmd_code =3D=3D 0x00) { - panic("IPL2 ccw data invalid. Is this disk really bootable?\n"); - } + return (ipl2_addr !=3D 0x00 && ccw->cmd_code !=3D 0x00); } =20 static uint32_t read_ipl2_addr(void) @@ -188,52 +179,67 @@ static void ipl1_fixup(void) ccwSearchTic->cda =3D ptr2u32(ccwSearchID); } =20 -static void run_ipl1(SubChannelId schid, uint16_t cutype) +static int run_ipl1(SubChannelId schid, uint16_t cutype) { uint32_t startAddr =3D 0x08; =20 - if (do_cio(schid, cutype, startAddr, CCW_FMT0)) { - panic("dasd-ipl: Failed to run IPL1 channel program\n"); - } + return do_cio(schid, cutype, startAddr, CCW_FMT0); } =20 -static void run_ipl2(SubChannelId schid, uint16_t cutype, uint32_t addr) +static int run_ipl2(SubChannelId schid, uint16_t cutype, uint32_t addr) { - if (run_dynamic_ccw_program(schid, cutype, addr)) { - panic("dasd-ipl: Failed to run IPL2 channel program\n"); - } + return run_dynamic_ccw_program(schid, cutype, addr); } =20 /* * Limitations in vfio-ccw support complicate the IPL process. Details can * be found in docs/devel/s390-dasd-ipl.rst */ -void dasd_ipl(SubChannelId schid, uint16_t cutype) +int dasd_ipl(SubChannelId schid, uint16_t cutype) { PSWLegacy *pswl =3D (PSWLegacy *) 0x00; uint32_t ipl2_addr; =20 /* Construct Read IPL CCW and run it to read IPL1 from boot disk */ make_readipl(); - run_readipl(schid, cutype); + if (run_readipl(schid, cutype)) { + puts("Failed to run Read IPL channel program"); + return -EIO; + } + ipl2_addr =3D read_ipl2_addr(); - check_ipl1(); + + if (!check_ipl1()) { + puts("IPL1 invalid for DASD-IPL"); + return -EINVAL; + } =20 /* * Fixup IPL1 channel program to account for vfio-ccw limitations, the= n run * it to read IPL2 channel program from boot disk. */ ipl1_fixup(); - run_ipl1(schid, cutype); - check_ipl2(ipl2_addr); + if (run_ipl1(schid, cutype)) { + puts("Failed to run IPL1 channel program"); + return -EIO; + } + + if (!check_ipl2(ipl2_addr)) { + puts("IPL2 invalid for DASD-IPL"); + return -EINVAL; + } =20 /* * Run IPL2 channel program to read operating system code from boot di= sk */ - run_ipl2(schid, cutype, ipl2_addr); + if (run_ipl2(schid, cutype, ipl2_addr)) { + puts("Failed to run IPL2 channel program"); + return -EIO; + } =20 /* Transfer control to the guest operating system */ pswl->mask |=3D PSW_MASK_EAMODE; /* Force z-mode */ pswl->addr |=3D PSW_MASK_BAMODE; /* ... */ jump_to_low_kernel(); + return 1; } --=20 2.45.1