[PULL 0/9] target-arm queue
[PULL 00/25] target-arm queue
1
Arm queue; bugfixes only.
1
v2: dropped the hw/acpi/ghes-stub.c changes, which produce a
2
weird Meson error ("Tried to extract unknown source ghes-stub.c")
3
which didn't happen on my local builds; I'll investigate later...
2
4
3
thanks
4
-- PMM
5
-- PMM
5
6
6
The following changes since commit 48aa8f0ac536db3550a35c295ff7de94e4c33739:
7
The following changes since commit 1ea06abceec61b6f3ab33dadb0510b6e09fb61e2:
7
8
8
Merge remote-tracking branch 'remotes/ericb/tags/pull-nbd-2020-11-16' into staging (2020-11-17 11:07:00 +0000)
9
Merge remote-tracking branch 'remotes/berrange-gitlab/tags/misc-fixes-pull-request' into staging (2021-06-14 15:59:13 +0100)
9
10
10
are available in the Git repository at:
11
are available in the Git repository at:
11
12
12
https://git.linaro.org/people/pmaydell/qemu-arm.git tags/pull-target-arm-20201117
13
https://git.linaro.org/people/pmaydell/qemu-arm.git tags/pull-target-arm-20210616
13
14
14
for you to fetch changes up to ab135622cf478585bdfcb68b85e4a817d74a0c42:
15
for you to fetch changes up to 703235a303d6862a7e3f5c6aa9eff7471cb138b2:
15
16
16
tmp105: Correct handling of temperature limit checks (2020-11-17 12:56:33 +0000)
17
include/qemu/int128.h: Add function to create Int128 from int64_t (2021-06-16 14:33:52 +0100)
17
18
18
----------------------------------------------------------------
19
----------------------------------------------------------------
19
target-arm queue:
20
target-arm queue:
20
* hw/arm/virt: ARM_VIRT must select ARM_GIC
21
* hw/intc/arm_gicv3_cpuif: Tolerate spurious EOIR writes
21
* exynos: Fix bad printf format specifiers
22
* handle some UNALLOCATED decode cases correctly rather
22
* hw/input/ps2.c: Remove remnants of printf debug
23
than asserting
23
* target/openrisc: Remove dead code attempting to check "is timer disabled"
24
* hw: virt: consider hw_compat_6_0
24
* register: Remove unnecessary NULL check
25
* hw/arm: add quanta-gbs-bmc machine
25
* util/cutils: Fix Coverity array overrun in freq_to_str()
26
* hw/intc/armv7m_nvic: Remove stale comment
26
* configure: Make "does libgio work" test pull in some actual functions
27
* target/arm: Fix mte page crossing test
27
* tmp105: reset the T_low and T_High registers
28
* hw/arm: quanta-q71l add pca954x muxes
28
* tmp105: Correct handling of temperature limit checks
29
* target/arm: First few parts of MVE support
29
30
30
----------------------------------------------------------------
31
----------------------------------------------------------------
31
Alex Chen (1):
32
Heinrich Schuchardt (1):
32
exynos: Fix bad printf format specifiers
33
hw: virt: consider hw_compat_6_0
33
34
34
Alistair Francis (1):
35
Jean-Philippe Brucker (1):
35
register: Remove unnecessary NULL check
36
hw/intc/arm_gicv3_cpuif: Tolerate spurious EOIR writes
36
37
37
Andrew Jones (1):
38
Patrick Venture (5):
38
hw/arm/virt: ARM_VIRT must select ARM_GIC
39
hw/arm: add quanta-gbs-bmc machine
40
hw/arm: quanta-gbs-bmc add i2c comments
41
hw/arm: gsj add i2c comments
42
hw/arm: gsj add pca9548
43
hw/arm: quanta-q71l add pca954x muxes
39
44
40
Peter Maydell (5):
45
Peter Maydell (14):
41
hw/input/ps2.c: Remove remnants of printf debug
46
hw/intc/armv7m_nvic: Remove stale comment
42
target/openrisc: Remove dead code attempting to check "is timer disabled"
47
target/arm: Provide and use H8 and H1_8 macros
43
configure: Make "does libgio work" test pull in some actual functions
48
target/arm: Enable FPSCR.QC bit for MVE
44
hw/misc/tmp105: reset the T_low and T_High registers
49
target/arm: Handle VPR semantics in existing code
45
tmp105: Correct handling of temperature limit checks
50
target/arm: Add handling for PSR.ECI/ICI
51
target/arm: Let vfp_access_check() handle late NOCP checks
52
target/arm: Implement MVE LCTP
53
target/arm: Implement MVE WLSTP insn
54
target/arm: Implement MVE DLSTP
55
target/arm: Implement MVE LETP insn
56
target/arm: Add framework for MVE decode
57
target/arm: Move expand_pred_b() data to vec_helper.c
58
bitops.h: Provide hswap32(), hswap64(), wswap64() swapping operations
59
include/qemu/int128.h: Add function to create Int128 from int64_t
46
60
47
Philippe Mathieu-Daudé (1):
61
Richard Henderson (4):
48
util/cutils: Fix Coverity array overrun in freq_to_str()
62
target/arm: Diagnose UNALLOCATED in disas_simd_two_reg_misc_fp16
63
target/arm: Remove fprintf from disas_simd_mod_imm
64
target/arm: Diagnose UNALLOCATED in disas_simd_three_reg_same_fp16
65
target/arm: Fix mte page crossing test
49
66
50
configure | 11 +++++--
67
include/qemu/bitops.h | 29 +++
51
hw/misc/tmp105.h | 7 +++++
68
include/qemu/int128.h | 10 +
52
hw/core/register.c | 4 ---
69
target/arm/translate-a32.h | 2 +
53
hw/input/ps2.c | 9 ------
70
target/arm/translate.h | 9 +
54
hw/misc/tmp105.c | 73 ++++++++++++++++++++++++++++++++++++++------
71
target/arm/vec_internal.h | 9 +
55
hw/timer/exynos4210_mct.c | 4 +--
72
target/arm/mve.decode | 20 ++
56
hw/timer/exynos4210_pwm.c | 8 ++---
73
target/arm/t32.decode | 15 +-
57
target/openrisc/sys_helper.c | 3 --
74
hw/arm/aspeed.c | 11 +-
58
util/cutils.c | 3 +-
75
hw/arm/npcm7xx_boards.c | 107 ++++++++++-
59
hw/arm/Kconfig | 1 +
76
hw/arm/virt.c | 2 +
60
10 files changed, 89 insertions(+), 34 deletions(-)
77
hw/intc/arm_gicv3_cpuif.c | 5 +-
78
hw/intc/armv7m_nvic.c | 6 -
79
target/arm/m_helper.c | 54 +++++-
80
target/arm/mte_helper.c | 2 +-
81
target/arm/sve_helper.c | 381 +++++++++++++-------------------------
82
target/arm/translate-a64.c | 87 +++++----
83
target/arm/translate-m-nocp.c | 16 +-
84
target/arm/translate-mve.c | 29 +++
85
target/arm/translate-vfp.c | 65 +++++--
86
target/arm/translate.c | 300 ++++++++++++++++++++++++++++--
87
target/arm/vec_helper.c | 116 +++++++++++-
88
target/arm/vfp_helper.c | 3 +-
89
tests/tcg/aarch64/mte-7.c | 31 ++++
90
hw/arm/Kconfig | 2 +
91
target/arm/meson.build | 2 +
92
tests/tcg/aarch64/Makefile.target | 2 +-
93
26 files changed, 967 insertions(+), 348 deletions(-)
94
create mode 100644 target/arm/mve.decode
95
create mode 100644 target/arm/translate-mve.c
96
create mode 100644 tests/tcg/aarch64/mte-7.c
61
97
diff view generated by jsdifflib
[PULL 1/9] hw/arm/virt: ARM_VIRT must select ARM_GIC
Deleted patch
1
From: Andrew Jones <drjones@redhat.com>
2
1
3
The removal of the selection of A15MPCORE from ARM_VIRT also
4
removed what A15MPCORE selects, ARM_GIC. We still need ARM_GIC.
5
6
Fixes: bec3c97e0cf9 ("hw/arm/virt: Remove dependency on Cortex-A15 MPCore peripherals")
7
Reported-by: Miroslav Rezanina <mrezanin@redhat.com>
8
Signed-off-by: Andrew Jones <drjones@redhat.com>
9
Reviewed-by: Miroslav Rezanina <mrezanin@redhat.com>
10
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
11
Message-id: 20201111143440.112763-1-drjones@redhat.com
12
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
13
---
14
hw/arm/Kconfig | 1 +
15
1 file changed, 1 insertion(+)
16
17
diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
18
index XXXXXXX..XXXXXXX 100644
19
--- a/hw/arm/Kconfig
20
+++ b/hw/arm/Kconfig
21
@@ -XXX,XX +XXX,XX @@ config ARM_VIRT
22
imply VFIO_PLATFORM
23
imply VFIO_XGMAC
24
imply TPM_TIS_SYSBUS
25
+ select ARM_GIC
26
select ACPI
27
select ARM_SMMUV3
28
select GPIO_KEY
29
--
30
2.20.1
31
32
diff view generated by jsdifflib
[PULL 2/9] exynos: Fix bad printf format specifiers
Deleted patch
1
From: Alex Chen <alex.chen@huawei.com>
2
1
3
We should use printf format specifier "%u" instead of "%d" for
4
argument of type "unsigned int".
5
6
Reported-by: Euler Robot <euler.robot@huawei.com>
7
Signed-off-by: Alex Chen <alex.chen@huawei.com>
8
Message-id: 20201111073651.72804-1-alex.chen@huawei.com
9
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
10
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
11
---
12
hw/timer/exynos4210_mct.c | 4 ++--
13
hw/timer/exynos4210_pwm.c | 8 ++++----
14
2 files changed, 6 insertions(+), 6 deletions(-)
15
16
diff --git a/hw/timer/exynos4210_mct.c b/hw/timer/exynos4210_mct.c
17
index XXXXXXX..XXXXXXX 100644
18
--- a/hw/timer/exynos4210_mct.c
19
+++ b/hw/timer/exynos4210_mct.c
20
@@ -XXX,XX +XXX,XX @@ static void exynos4210_gcomp_raise_irq(void *opaque, uint32_t id)
21
/* If CSTAT is pending and IRQ is enabled */
22
if ((s->reg.int_cstat & G_INT_CSTAT_COMP(id)) &&
23
(s->reg.int_enb & G_INT_ENABLE(id))) {
24
- DPRINTF("gcmp timer[%d] IRQ\n", id);
25
+ DPRINTF("gcmp timer[%u] IRQ\n", id);
26
qemu_irq_raise(s->irq[id]);
27
}
28
}
29
@@ -XXX,XX +XXX,XX @@ static void exynos4210_mct_update_freq(Exynos4210MCTState *s)
30
MCT_CFG_GET_DIVIDER(s->reg_mct_cfg));
31
32
if (freq != s->freq) {
33
- DPRINTF("freq=%dHz\n", s->freq);
34
+ DPRINTF("freq=%uHz\n", s->freq);
35
36
/* global timer */
37
tx_ptimer_set_freq(s->g_timer.ptimer_frc, s->freq);
38
diff --git a/hw/timer/exynos4210_pwm.c b/hw/timer/exynos4210_pwm.c
39
index XXXXXXX..XXXXXXX 100644
40
--- a/hw/timer/exynos4210_pwm.c
41
+++ b/hw/timer/exynos4210_pwm.c
42
@@ -XXX,XX +XXX,XX @@ static void exynos4210_pwm_update_freq(Exynos4210PWMState *s, uint32_t id)
43
44
if (freq != s->timer[id].freq) {
45
ptimer_set_freq(s->timer[id].ptimer, s->timer[id].freq);
46
- DPRINTF("freq=%dHz\n", s->timer[id].freq);
47
+ DPRINTF("freq=%uHz\n", s->timer[id].freq);
48
}
49
}
50
51
@@ -XXX,XX +XXX,XX @@ static void exynos4210_pwm_tick(void *opaque)
52
uint32_t id = s->id;
53
bool cmp;
54
55
- DPRINTF("timer %d tick\n", id);
56
+ DPRINTF("timer %u tick\n", id);
57
58
/* set irq status */
59
p->reg_tint_cstat |= TINT_CSTAT_STATUS(id);
60
61
/* raise IRQ */
62
if (p->reg_tint_cstat & TINT_CSTAT_ENABLE(id)) {
63
- DPRINTF("timer %d IRQ\n", id);
64
+ DPRINTF("timer %u IRQ\n", id);
65
qemu_irq_raise(p->timer[id].irq);
66
}
67
68
@@ -XXX,XX +XXX,XX @@ static void exynos4210_pwm_tick(void *opaque)
69
}
70
71
if (cmp) {
72
- DPRINTF("auto reload timer %d count to %x\n", id,
73
+ DPRINTF("auto reload timer %u count to %x\n", id,
74
p->timer[id].reg_tcntb);
75
ptimer_set_count(p->timer[id].ptimer, p->timer[id].reg_tcntb);
76
ptimer_run(p->timer[id].ptimer, 1);
77
--
78
2.20.1
79
80
diff view generated by jsdifflib
[PULL 3/9] hw/input/ps2.c: Remove remnants of printf debug
Deleted patch
1
In commit 5edab03d4040 we added tracepoints to the ps2 keyboard
2
and mouse emulation. However we didn't remove all the debug-by-printf
3
support. In fact there is only one printf() remaining, and it is
4
redundant with the trace_ps2_write_mouse() event next to it.
5
Remove the printf() and the now-unused DEBUG* macros.
6
1
7
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
8
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
9
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
10
Message-id: 20201101133258.4240-1-peter.maydell@linaro.org
11
---
12
hw/input/ps2.c | 9 ---------
13
1 file changed, 9 deletions(-)
14
15
diff --git a/hw/input/ps2.c b/hw/input/ps2.c
16
index XXXXXXX..XXXXXXX 100644
17
--- a/hw/input/ps2.c
18
+++ b/hw/input/ps2.c
19
@@ -XXX,XX +XXX,XX @@
20
21
#include "trace.h"
22
23
-/* debug PC keyboard */
24
-//#define DEBUG_KBD
25
-
26
-/* debug PC keyboard : only mouse */
27
-//#define DEBUG_MOUSE
28
-
29
/* Keyboard Commands */
30
#define KBD_CMD_SET_LEDS    0xED    /* Set keyboard leds */
31
#define KBD_CMD_ECHO     0xEE
32
@@ -XXX,XX +XXX,XX @@ void ps2_write_mouse(void *opaque, int val)
33
PS2MouseState *s = (PS2MouseState *)opaque;
34
35
trace_ps2_write_mouse(opaque, val);
36
-#ifdef DEBUG_MOUSE
37
- printf("kbd: write mouse 0x%02x\n", val);
38
-#endif
39
switch(s->common.write_cmd) {
40
default:
41
case -1:
42
--
43
2.20.1
44
45
diff view generated by jsdifflib
[PULL 4/9] target/openrisc: Remove dead code attempting to check "is timer disabled"
Deleted patch
1
In the mtspr helper we attempt to check for "is the timer disabled"
2
with "if (env->ttmr & TIMER_NONE)". This is wrong because TIMER_NONE
3
is zero and the condition is always false (Coverity complains about
4
the dead code.)
5
1
6
The correct check would be to test whether the TTMR_M field in the
7
register is equal to TIMER_NONE instead. However, the
8
cpu_openrisc_timer_update() function checks whether the timer is
9
enabled (it looks at cpu->env.is_counting, which is set to 0 via
10
cpu_openrisc_count_stop() when the TTMR_M field is set to
11
TIMER_NONE), so there's no need to check for "timer disabled" in the
12
target/openrisc code. Instead, simply remove the dead code.
13
14
Fixes: Coverity CID 1005812
15
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
16
Acked-by: Stafford Horne <shorne@gmail.com>
17
Message-id: 20201103114654.18540-1-peter.maydell@linaro.org
18
---
19
target/openrisc/sys_helper.c | 3 ---
20
1 file changed, 3 deletions(-)
21
22
diff --git a/target/openrisc/sys_helper.c b/target/openrisc/sys_helper.c
23
index XXXXXXX..XXXXXXX 100644
24
--- a/target/openrisc/sys_helper.c
25
+++ b/target/openrisc/sys_helper.c
26
@@ -XXX,XX +XXX,XX @@ void HELPER(mtspr)(CPUOpenRISCState *env, target_ulong spr, target_ulong rb)
27
28
case TO_SPR(10, 1): /* TTCR */
29
cpu_openrisc_count_set(cpu, rb);
30
- if (env->ttmr & TIMER_NONE) {
31
- return;
32
- }
33
cpu_openrisc_timer_update(cpu);
34
break;
35
#endif
36
--
37
2.20.1
38
39
diff view generated by jsdifflib
[PULL 5/9] register: Remove unnecessary NULL check
Deleted patch
1
From: Alistair Francis <alistair.francis@wdc.com>
2
1
3
This patch fixes CID 1432800 by removing an unnecessary check.
4
5
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
6
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
7
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
8
---
9
hw/core/register.c | 4 ----
10
1 file changed, 4 deletions(-)
11
12
diff --git a/hw/core/register.c b/hw/core/register.c
13
index XXXXXXX..XXXXXXX 100644
14
--- a/hw/core/register.c
15
+++ b/hw/core/register.c
16
@@ -XXX,XX +XXX,XX @@ static RegisterInfoArray *register_init_block(DeviceState *owner,
17
int index = rae[i].addr / data_size;
18
RegisterInfo *r = &ri[index];
19
20
- if (data + data_size * index == 0 || !&rae[i]) {
21
- continue;
22
- }
23
-
24
/* Init the register, this will zero it. */
25
object_initialize((void *)r, sizeof(*r), TYPE_REGISTER);
26
27
--
28
2.20.1
29
30
diff view generated by jsdifflib
[PULL 6/9] util/cutils: Fix Coverity array overrun in freq_to_str()
Deleted patch
1
From: Philippe Mathieu-Daudé <f4bug@amsat.org>
2
1
3
Fix Coverity CID 1435957: Memory - illegal accesses (OVERRUN):
4
5
>>> Overrunning array "suffixes" of 7 8-byte elements at element
6
index 7 (byte offset 63) using index "idx" (which evaluates to 7).
7
8
Note, the biggest input value freq_to_str() can accept is UINT64_MAX,
9
which is ~18.446 EHz, less than 1000 EHz.
10
11
Reported-by: Eduardo Habkost <ehabkost@redhat.com>
12
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
13
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
14
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
15
Reviewed-by: Luc Michel <luc@lmichel.fr>
16
Message-id: 20201101215755.2021421-1-f4bug@amsat.org
17
Suggested-by: Peter Maydell <peter.maydell@linaro.org>
18
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
19
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
20
---
21
util/cutils.c | 3 ++-
22
1 file changed, 2 insertions(+), 1 deletion(-)
23
24
diff --git a/util/cutils.c b/util/cutils.c
25
index XXXXXXX..XXXXXXX 100644
26
--- a/util/cutils.c
27
+++ b/util/cutils.c
28
@@ -XXX,XX +XXX,XX @@ char *freq_to_str(uint64_t freq_hz)
29
double freq = freq_hz;
30
size_t idx = 0;
31
32
- while (freq >= 1000.0 && idx < ARRAY_SIZE(suffixes)) {
33
+ while (freq >= 1000.0) {
34
freq /= 1000.0;
35
idx++;
36
}
37
+ assert(idx < ARRAY_SIZE(suffixes));
38
39
return g_strdup_printf("%0.3g %sHz", freq, suffixes[idx]);
40
}
41
--
42
2.20.1
43
44
diff view generated by jsdifflib
[PULL 7/9] configure: Make "does libgio work" test pull in some actual functions
Deleted patch
1
In commit 76346b6264a9b01979 we tried to add a configure check that
2
the libgio pkg-config data was correct, which builds an executable
3
linked against it. Unfortunately this doesn't catch the problem
4
(missing static library dependency info), because a "do nothing" test
5
source file doesn't have any symbol references that cause the linker
6
to pull in .o files from libgio.a, and so we don't see the "missing
7
symbols from libmount" error that a full QEMU link triggers.
8
1
9
(The ineffective test went unnoticed because of a typo that
10
effectively disabled libgio unconditionally, but after commit
11
3569a5dfc11f2 fixed that, a static link of the system emulator on
12
Ubuntu stopped working again.)
13
14
Improve the gio test by having the test source fragment reference a
15
g_dbus function (which is what is indirectly causing us to end up
16
wanting functions from libmount).
17
18
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
19
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
20
Message-id: 20201116104617.18333-1-peter.maydell@linaro.org
21
---
22
configure | 11 +++++++++--
23
1 file changed, 9 insertions(+), 2 deletions(-)
24
25
diff --git a/configure b/configure
26
index XXXXXXX..XXXXXXX 100755
27
--- a/configure
28
+++ b/configure
29
@@ -XXX,XX +XXX,XX @@ if $pkg_config --atleast-version=$glib_req_ver gio-2.0; then
30
# Check that the libraries actually work -- Ubuntu 18.04 ships
31
# with pkg-config --static --libs data for gio-2.0 that is missing
32
# -lblkid and will give a link error.
33
- write_c_skeleton
34
- if compile_prog "" "$gio_libs" ; then
35
+ cat > $TMPC <<EOF
36
+#include <gio/gio.h>
37
+int main(void)
38
+{
39
+ g_dbus_proxy_new_sync(0, 0, 0, 0, 0, 0, 0, 0);
40
+ return 0;
41
+}
42
+EOF
43
+ if compile_prog "$gio_cflags" "$gio_libs" ; then
44
gio=yes
45
else
46
gio=no
47
--
48
2.20.1
49
50
diff view generated by jsdifflib
[PULL 8/9] hw/misc/tmp105: reset the T_low and T_High registers
Deleted patch
1
The TMP105 datasheet (https://www.ti.com/lit/gpn/tmp105) says that the
2
power-up reset values for the T_low and T_high registers are 80 degrees C
3
and 75 degrees C, which are 0x500 and 0x4B0 hex according to table 5. These
4
values are then shifted right by four bits to give the register reset
5
values, since both registers store the 12 bits of temperature data in bits
6
[15..4] of a 16 bit register.
7
1
8
We were resetting these registers to zero, which is problematic for Linux
9
guests which enable the alert interrupt and then immediately take an
10
unexpected overtemperature alert because the current temperature is above
11
freezing...
12
13
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
14
Reviewed-by: Cédric Le Goater <clg@kaod.org>
15
Message-id: 20201110150023.25533-2-peter.maydell@linaro.org
16
---
17
hw/misc/tmp105.c | 3 +++
18
1 file changed, 3 insertions(+)
19
20
diff --git a/hw/misc/tmp105.c b/hw/misc/tmp105.c
21
index XXXXXXX..XXXXXXX 100644
22
--- a/hw/misc/tmp105.c
23
+++ b/hw/misc/tmp105.c
24
@@ -XXX,XX +XXX,XX @@ static void tmp105_reset(I2CSlave *i2c)
25
s->faults = tmp105_faultq[(s->config >> 3) & 3];
26
s->alarm = 0;
27
28
+ s->limit[0] = 0x4b00; /* T_LOW, 75 degrees C */
29
+ s->limit[1] = 0x5000; /* T_HIGH, 80 degrees C */
30
+
31
tmp105_interrupt_update(s);
32
}
33
34
--
35
2.20.1
36
37
diff view generated by jsdifflib
[PULL 9/9] tmp105: Correct handling of temperature limit checks
Deleted patch
1
The TMP105 datasheet says that in Interrupt Mode (when TM==1) the device
2
signals an alert when the temperature equals or exceeds the T_high value and
3
then remains high until a device register is read or the device responds to
4
the SMBUS Alert Response address, or the device is put into Shutdown Mode.
5
Thereafter the Alert pin will only be re-signalled when temperature falls
6
below T_low; alert can then be cleared in the same set of ways, and the
7
device returns to its initial "alert when temperature goes above T_high"
8
mode. (If this textual description is confusing, see figure 3 in the
9
TI datasheet at https://www.ti.com/lit/gpn/tmp105 .)
10
1
11
We were misimplementing this as a simple "always alert if temperature is
12
above T_high or below T_low" condition, which gives a spurious alert on
13
startup if using the "T_high = 80 degrees C, T_low = 75 degrees C" reset
14
limit values.
15
16
Implement the correct (hysteresis) behaviour by tracking whether we
17
are currently looking for the temperature to rise over T_high or
18
for it to fall below T_low. Our implementation of the comparator
19
mode (TM==0) wasn't wrong, but rephrase it to match the way that
20
interrupt mode is now handled for clarity.
21
22
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
23
Reviewed-by: Cédric Le Goater <clg@kaod.org>
24
Message-id: 20201110150023.25533-3-peter.maydell@linaro.org
25
---
26
hw/misc/tmp105.h | 7 +++++
27
hw/misc/tmp105.c | 70 +++++++++++++++++++++++++++++++++++++++++-------
28
2 files changed, 68 insertions(+), 9 deletions(-)
29
30
diff --git a/hw/misc/tmp105.h b/hw/misc/tmp105.h
31
index XXXXXXX..XXXXXXX 100644
32
--- a/hw/misc/tmp105.h
33
+++ b/hw/misc/tmp105.h
34
@@ -XXX,XX +XXX,XX @@ struct TMP105State {
35
int16_t limit[2];
36
int faults;
37
uint8_t alarm;
38
+ /*
39
+ * The TMP105 initially looks for a temperature rising above T_high;
40
+ * once this is detected, the condition it looks for next is the
41
+ * temperature falling below T_low. This flag is false when initially
42
+ * looking for T_high, true when looking for T_low.
43
+ */
44
+ bool detect_falling;
45
};
46
47
#endif
48
diff --git a/hw/misc/tmp105.c b/hw/misc/tmp105.c
49
index XXXXXXX..XXXXXXX 100644
50
--- a/hw/misc/tmp105.c
51
+++ b/hw/misc/tmp105.c
52
@@ -XXX,XX +XXX,XX @@ static void tmp105_alarm_update(TMP105State *s)
53
return;
54
}
55
56
- if ((s->config >> 1) & 1) {                    /* TM */
57
- if (s->temperature >= s->limit[1])
58
- s->alarm = 1;
59
- else if (s->temperature < s->limit[0])
60
- s->alarm = 1;
61
+ if (s->config >> 1 & 1) {
62
+ /*
63
+ * TM == 1 : Interrupt mode. We signal Alert when the
64
+ * temperature rises above T_high, and expect the guest to clear
65
+ * it (eg by reading a device register).
66
+ */
67
+ if (s->detect_falling) {
68
+ if (s->temperature < s->limit[0]) {
69
+ s->alarm = 1;
70
+ s->detect_falling = false;
71
+ }
72
+ } else {
73
+ if (s->temperature >= s->limit[1]) {
74
+ s->alarm = 1;
75
+ s->detect_falling = true;
76
+ }
77
+ }
78
} else {
79
- if (s->temperature >= s->limit[1])
80
- s->alarm = 1;
81
- else if (s->temperature < s->limit[0])
82
- s->alarm = 0;
83
+ /*
84
+ * TM == 0 : Comparator mode. We signal Alert when the temperature
85
+ * rises above T_high, and stop signalling it when the temperature
86
+ * falls below T_low.
87
+ */
88
+ if (s->detect_falling) {
89
+ if (s->temperature < s->limit[0]) {
90
+ s->alarm = 0;
91
+ s->detect_falling = false;
92
+ }
93
+ } else {
94
+ if (s->temperature >= s->limit[1]) {
95
+ s->alarm = 1;
96
+ s->detect_falling = true;
97
+ }
98
+ }
99
}
100
101
tmp105_interrupt_update(s);
102
@@ -XXX,XX +XXX,XX @@ static int tmp105_post_load(void *opaque, int version_id)
103
return 0;
104
}
105
106
+static bool detect_falling_needed(void *opaque)
107
+{
108
+ TMP105State *s = opaque;
109
+
110
+ /*
111
+ * We only need to migrate the detect_falling bool if it's set;
112
+ * for migration from older machines we assume that it is false
113
+ * (ie temperature is not out of range).
114
+ */
115
+ return s->detect_falling;
116
+}
117
+
118
+static const VMStateDescription vmstate_tmp105_detect_falling = {
119
+ .name = "TMP105/detect-falling",
120
+ .version_id = 1,
121
+ .minimum_version_id = 1,
122
+ .needed = detect_falling_needed,
123
+ .fields = (VMStateField[]) {
124
+ VMSTATE_BOOL(detect_falling, TMP105State),
125
+ VMSTATE_END_OF_LIST()
126
+ }
127
+};
128
+
129
static const VMStateDescription vmstate_tmp105 = {
130
.name = "TMP105",
131
.version_id = 0,
132
@@ -XXX,XX +XXX,XX @@ static const VMStateDescription vmstate_tmp105 = {
133
VMSTATE_UINT8(alarm, TMP105State),
134
VMSTATE_I2C_SLAVE(i2c, TMP105State),
135
VMSTATE_END_OF_LIST()
136
+ },
137
+ .subsections = (const VMStateDescription*[]) {
138
+ &vmstate_tmp105_detect_falling,
139
+ NULL
140
}
141
};
142
143
@@ -XXX,XX +XXX,XX @@ static void tmp105_reset(I2CSlave *i2c)
144
s->config = 0;
145
s->faults = tmp105_faultq[(s->config >> 3) & 3];
146
s->alarm = 0;
147
+ s->detect_falling = false;
148
149
s->limit[0] = 0x4b00; /* T_LOW, 75 degrees C */
150
s->limit[1] = 0x5000; /* T_HIGH, 80 degrees C */
151
--
152
2.20.1
153
154
diff view generated by jsdifflib

Patchew 2.1-devel-b67e4c2

© 2016 - 2025 Red Hat, Inc.