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| author | Lev Kujawski <lkujaw@member.fsf.org> | 2022-07-07 03:11:36 +0000 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2022-09-30 18:43:44 +0200 |
| commit | 3195c9e6abe96b367a671474e850ae3f89781880 (patch) | |
| tree | 4709c745c0b9150476b664ab3a7e61718791cc14 /hw/ide/core.c | |
| parent | ecfcf71314bc1548f387a035e1061296ec8f4ec3 (diff) | |
| download | focaccia-qemu-3195c9e6abe96b367a671474e850ae3f89781880.tar.gz focaccia-qemu-3195c9e6abe96b367a671474e850ae3f89781880.zip | |
hw/ide/core: Clear LBA and drive bits for EXECUTE DEVICE DIAGNOSTIC
Prior to this patch, cmd_exec_dev_diagnostic relied upon ide_set_signature to clear the device register. While the preservation of the drive bit by ide_set_signature is necessary for the DEVICE RESET, IDENTIFY DEVICE, and READ SECTOR commands, ATA/ATAPI-6 specifies that "DEV shall be cleared to zero" for EXECUTE DEVICE DIAGNOSTIC. This deviation was uncovered by the ATACT Device Testing Program written by Hale Landis. Signed-off-by: Lev Kujawski <lkujaw@member.fsf.org> Message-Id: <20220707031140.158958-3-lkujaw@member.fsf.org> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'hw/ide/core.c')
| -rw-r--r-- | hw/ide/core.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/hw/ide/core.c b/hw/ide/core.c index 7cbc0a54a7..b747191ebf 100644 --- a/hw/ide/core.c +++ b/hw/ide/core.c @@ -1704,8 +1704,14 @@ static bool cmd_identify_packet(IDEState *s, uint8_t cmd) return false; } +/* EXECUTE DEVICE DIAGNOSTIC */ static bool cmd_exec_dev_diagnostic(IDEState *s, uint8_t cmd) { + /* + * Clear the device register per the ATA (v6) specification, + * because ide_set_signature does not clear LBA or drive bits. + */ + s->select = (ATA_DEV_ALWAYS_ON); ide_set_signature(s); if (s->drive_kind == IDE_CD) { |