libqos/ahci: Add halted command helpers
Sometimes we want a command to halt the VM instead of complete successfully, so it'd be nice to let the libqos/ahci functions cope with such scenarios. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-id: 1430417242-11859-2-git-send-email-jsnow@redhat.com
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@ -566,6 +566,33 @@ inline unsigned size_to_prdtl(unsigned bytes, unsigned bytes_per_prd)
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return (bytes + bytes_per_prd - 1) / bytes_per_prd;
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return (bytes + bytes_per_prd - 1) / bytes_per_prd;
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}
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}
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/* Issue a command, expecting it to fail and STOP the VM */
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AHCICommand *ahci_guest_io_halt(AHCIQState *ahci, uint8_t port,
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uint8_t ide_cmd, uint64_t buffer,
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size_t bufsize, uint64_t sector)
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{
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AHCICommand *cmd;
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cmd = ahci_command_create(ide_cmd);
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ahci_command_adjust(cmd, sector, buffer, bufsize, 0);
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ahci_command_commit(ahci, cmd, port);
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ahci_command_issue_async(ahci, cmd);
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qmp_eventwait("STOP");
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return cmd;
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}
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/* Resume a previously failed command and verify/finalize */
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void ahci_guest_io_resume(AHCIQState *ahci, AHCICommand *cmd)
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{
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/* Complete the command */
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qmp_async("{'execute':'cont' }");
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qmp_eventwait("RESUME");
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ahci_command_wait(ahci, cmd);
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ahci_command_verify(ahci, cmd);
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ahci_command_free(cmd);
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}
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/* Given a guest buffer address, perform an IO operation */
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/* Given a guest buffer address, perform an IO operation */
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void ahci_guest_io(AHCIQState *ahci, uint8_t port, uint8_t ide_cmd,
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void ahci_guest_io(AHCIQState *ahci, uint8_t port, uint8_t ide_cmd,
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uint64_t buffer, size_t bufsize, uint64_t sector)
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uint64_t buffer, size_t bufsize, uint64_t sector)
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@ -524,6 +524,9 @@ unsigned ahci_pick_cmd(AHCIQState *ahci, uint8_t port);
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unsigned size_to_prdtl(unsigned bytes, unsigned bytes_per_prd);
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unsigned size_to_prdtl(unsigned bytes, unsigned bytes_per_prd);
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void ahci_guest_io(AHCIQState *ahci, uint8_t port, uint8_t ide_cmd,
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void ahci_guest_io(AHCIQState *ahci, uint8_t port, uint8_t ide_cmd,
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uint64_t gbuffer, size_t size, uint64_t sector);
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uint64_t gbuffer, size_t size, uint64_t sector);
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AHCICommand *ahci_guest_io_halt(AHCIQState *ahci, uint8_t port, uint8_t ide_cmd,
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uint64_t gbuffer, size_t size, uint64_t sector);
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void ahci_guest_io_resume(AHCIQState *ahci, AHCICommand *cmd);
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void ahci_io(AHCIQState *ahci, uint8_t port, uint8_t ide_cmd,
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void ahci_io(AHCIQState *ahci, uint8_t port, uint8_t ide_cmd,
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void *buffer, size_t bufsize, uint64_t sector);
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void *buffer, size_t bufsize, uint64_t sector);
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