* [Qemu-devel] [PATCH v2 0/1] ide/atapi: Mark non-data commands as complete
@ 2014-09-13 3:51 John Snow
2014-09-13 3:51 ` [Qemu-devel] [PATCH v2 1/1] " John Snow
2014-09-15 15:48 ` [Qemu-devel] [PATCH v2 0/1] " Stefan Hajnoczi
0 siblings, 2 replies; 4+ messages in thread
From: John Snow @ 2014-09-13 3:51 UTC (permalink / raw)
To: qemu-devel; +Cc: kwolf, pbonzini, jsnow, stefanha
v2:
- Instead of using ide_set_inactive, use ide_stop_transfer
- ATAPI helpers use either ide_atapi_cmd_ok or ide_atapi_cmd_error,
instead of ide_stop_transfer directly.
John Snow (1):
ide/atapi: Mark non-data commands as complete
hw/ide/atapi.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
--
1.9.3
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Qemu-devel] [PATCH v2 1/1] ide/atapi: Mark non-data commands as complete
2014-09-13 3:51 [Qemu-devel] [PATCH v2 0/1] ide/atapi: Mark non-data commands as complete John Snow
@ 2014-09-13 3:51 ` John Snow
2014-09-13 10:35 ` Paolo Bonzini
2014-09-15 15:48 ` [Qemu-devel] [PATCH v2 0/1] " Stefan Hajnoczi
1 sibling, 1 reply; 4+ messages in thread
From: John Snow @ 2014-09-13 3:51 UTC (permalink / raw)
To: qemu-devel; +Cc: kwolf, pbonzini, jsnow, stefanha
When the command completion code in IDE and AHCI
was unified to put all command completion inside
of a callback, "cmd_done," we neglected to
ensure that all AHCI/ATAPI command paths would
eventually register as finished. for the PCI
interface to IDE this is not a problem because
cmd_done is a nop, but the AHCI implementation
needs to send a D2H_REG_FIS and interrupt back
to the guest to inform of completion.
This patch adds calls to ide_stop_transfer,
which calls ide_cmd_done, inside of
ide_atapi_cmd_ok and ide_atapi_cmd_error.
This fixes regressions observed by trying to boot QEMU
with a Fedora 20 live CD under Q35/AHCI, which uses
ATAPI command 0x00, which is a status check that may
cause a hang because we never complete, and ATAPI
command 0x56, which is unsupported by our current
implementation and results in an error that we never
report back to the guest.
Signed-off-by: John Snow <jsnow@redhat.com>
---
hw/ide/atapi.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/hw/ide/atapi.c b/hw/ide/atapi.c
index 3d92b52..ee80c22 100644
--- a/hw/ide/atapi.c
+++ b/hw/ide/atapi.c
@@ -134,6 +134,7 @@ void ide_atapi_cmd_ok(IDEState *s)
s->error = 0;
s->status = READY_STAT | SEEK_STAT;
s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD;
+ ide_transfer_stop(s);
ide_set_irq(s->bus);
}
@@ -147,6 +148,7 @@ void ide_atapi_cmd_error(IDEState *s, int sense_key, int asc)
s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD;
s->sense_key = sense_key;
s->asc = asc;
+ ide_transfer_stop(s);
ide_set_irq(s->bus);
}
@@ -174,9 +176,7 @@ void ide_atapi_cmd_reply_end(IDEState *s)
#endif
if (s->packet_transfer_size <= 0) {
/* end of transfer */
- s->status = READY_STAT | SEEK_STAT;
- s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD;
- ide_transfer_stop(s);
+ ide_atapi_cmd_ok(s);
ide_set_irq(s->bus);
#ifdef DEBUG_IDE_ATAPI
printf("status=0x%x\n", s->status);
@@ -186,7 +186,6 @@ void ide_atapi_cmd_reply_end(IDEState *s)
if (s->lba != -1 && s->io_buffer_index >= s->cd_sector_size) {
ret = cd_read_sector(s, s->lba, s->io_buffer, s->cd_sector_size);
if (ret < 0) {
- ide_transfer_stop(s);
ide_atapi_io_error(s, ret);
return;
}
--
1.9.3
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [Qemu-devel] [PATCH v2 1/1] ide/atapi: Mark non-data commands as complete
2014-09-13 3:51 ` [Qemu-devel] [PATCH v2 1/1] " John Snow
@ 2014-09-13 10:35 ` Paolo Bonzini
0 siblings, 0 replies; 4+ messages in thread
From: Paolo Bonzini @ 2014-09-13 10:35 UTC (permalink / raw)
To: John Snow, qemu-devel; +Cc: kwolf, stefanha
Il 13/09/2014 05:51, John Snow ha scritto:
> When the command completion code in IDE and AHCI
> was unified to put all command completion inside
> of a callback, "cmd_done," we neglected to
> ensure that all AHCI/ATAPI command paths would
> eventually register as finished. for the PCI
> interface to IDE this is not a problem because
> cmd_done is a nop, but the AHCI implementation
> needs to send a D2H_REG_FIS and interrupt back
> to the guest to inform of completion.
>
> This patch adds calls to ide_stop_transfer,
> which calls ide_cmd_done, inside of
> ide_atapi_cmd_ok and ide_atapi_cmd_error.
>
> This fixes regressions observed by trying to boot QEMU
> with a Fedora 20 live CD under Q35/AHCI, which uses
> ATAPI command 0x00, which is a status check that may
> cause a hang because we never complete, and ATAPI
> command 0x56, which is unsupported by our current
> implementation and results in an error that we never
> report back to the guest.
>
> Signed-off-by: John Snow <jsnow@redhat.com>
> ---
> hw/ide/atapi.c | 7 +++----
> 1 file changed, 3 insertions(+), 4 deletions(-)
>
> diff --git a/hw/ide/atapi.c b/hw/ide/atapi.c
> index 3d92b52..ee80c22 100644
> --- a/hw/ide/atapi.c
> +++ b/hw/ide/atapi.c
> @@ -134,6 +134,7 @@ void ide_atapi_cmd_ok(IDEState *s)
> s->error = 0;
> s->status = READY_STAT | SEEK_STAT;
> s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD;
> + ide_transfer_stop(s);
> ide_set_irq(s->bus);
> }
>
> @@ -147,6 +148,7 @@ void ide_atapi_cmd_error(IDEState *s, int sense_key, int asc)
> s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD;
> s->sense_key = sense_key;
> s->asc = asc;
> + ide_transfer_stop(s);
> ide_set_irq(s->bus);
> }
>
> @@ -174,9 +176,7 @@ void ide_atapi_cmd_reply_end(IDEState *s)
> #endif
> if (s->packet_transfer_size <= 0) {
> /* end of transfer */
> - s->status = READY_STAT | SEEK_STAT;
> - s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD;
> - ide_transfer_stop(s);
> + ide_atapi_cmd_ok(s);
> ide_set_irq(s->bus);
> #ifdef DEBUG_IDE_ATAPI
> printf("status=0x%x\n", s->status);
> @@ -186,7 +186,6 @@ void ide_atapi_cmd_reply_end(IDEState *s)
> if (s->lba != -1 && s->io_buffer_index >= s->cd_sector_size) {
> ret = cd_read_sector(s, s->lba, s->io_buffer, s->cd_sector_size);
> if (ret < 0) {
> - ide_transfer_stop(s);
> ide_atapi_io_error(s, ret);
> return;
> }
>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [Qemu-devel] [PATCH v2 0/1] ide/atapi: Mark non-data commands as complete
2014-09-13 3:51 [Qemu-devel] [PATCH v2 0/1] ide/atapi: Mark non-data commands as complete John Snow
2014-09-13 3:51 ` [Qemu-devel] [PATCH v2 1/1] " John Snow
@ 2014-09-15 15:48 ` Stefan Hajnoczi
1 sibling, 0 replies; 4+ messages in thread
From: Stefan Hajnoczi @ 2014-09-15 15:48 UTC (permalink / raw)
To: John Snow; +Cc: kwolf, pbonzini, qemu-devel, stefanha
[-- Attachment #1: Type: text/plain, Size: 534 bytes --]
On Fri, Sep 12, 2014 at 11:51:11PM -0400, John Snow wrote:
> v2:
>
> - Instead of using ide_set_inactive, use ide_stop_transfer
> - ATAPI helpers use either ide_atapi_cmd_ok or ide_atapi_cmd_error,
> instead of ide_stop_transfer directly.
>
> John Snow (1):
> ide/atapi: Mark non-data commands as complete
>
> hw/ide/atapi.c | 7 +++----
> 1 file changed, 3 insertions(+), 4 deletions(-)
>
> --
> 1.9.3
>
>
Thanks, applied to my block tree:
https://github.com/stefanha/qemu/commits/block
Stefan
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^ permalink raw reply [flat|nested] 4+ messages in thread
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2014-09-13 3:51 [Qemu-devel] [PATCH v2 0/1] ide/atapi: Mark non-data commands as complete John Snow
2014-09-13 3:51 ` [Qemu-devel] [PATCH v2 1/1] " John Snow
2014-09-13 10:35 ` Paolo Bonzini
2014-09-15 15:48 ` [Qemu-devel] [PATCH v2 0/1] " Stefan Hajnoczi
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