From: Suzuki K Poulose <[email protected]>
[ Upstream commit 1d676673d665fd2162e7e466dcfbe5373bfdb73e ]
Currently we advertise the ID_AA6DFR0_EL1.TRACEVER for the guest,
when the trace register accesses are trapped (CPTR_EL2.TTA == 1).
So, the guest will get an undefined instruction, if trusts the
ID registers and access one of the trace registers.
Lets be nice to the guest and hide the feature to avoid
unexpected behavior.
Even though this can be done at KVM sysreg emulation layer,
we do this by removing the TRACEVER from the sanitised feature
register field. This is fine as long as the ETM drivers
can handle the individual trace units separately, even
when there are differences among the CPUs.
Cc: Will Deacon <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Mark Rutland <[email protected]>
Signed-off-by: Suzuki K Poulose <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Sasha Levin <[email protected]>
---
arch/arm64/kernel/cpufeature.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 1719d21a171a..122d5e843ab6 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -258,7 +258,6 @@ static const struct arm64_ftr_bits ftr_id_aa64dfr0[] = {
* of support.
*/
S_ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_EXACT, ID_AA64DFR0_PMUVER_SHIFT, 4, 0),
- ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_EXACT, ID_AA64DFR0_TRACEVER_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_EXACT, ID_AA64DFR0_DEBUGVER_SHIFT, 4, 0x6),
ARM64_FTR_END,
};
--
2.30.2
From: Dmitry Osipenko <[email protected]>
[ Upstream commit f8fb97c915954fc6de6513cdf277103b5c6df7b3 ]
RGB output doesn't allow to change parent clock rate of the display and
PCLK rate is set to 0Hz in this case. The tegra_dc_commit_state() shall
not set the display clock to 0Hz since this change propagates to the
parent clock. The DISP clock is defined as a NODIV clock by the tegra-clk
driver and all NODIV clocks use the CLK_SET_RATE_PARENT flag.
This bug stayed unnoticed because by default PLLP is used as the parent
clock for the display controller and PLLP silently skips the erroneous 0Hz
rate changes because it always has active child clocks that don't permit
rate changes. The PLLP isn't acceptable for some devices that we want to
upstream (like Samsung Galaxy Tab and ASUS TF700T) due to a display panel
clock rate requirements that can't be fulfilled by using PLLP and then the
bug pops up in this case since parent clock is set to 0Hz, killing the
display output.
Don't touch DC clock if pclk=0 in order to fix the problem.
Signed-off-by: Dmitry Osipenko <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
---
drivers/gpu/drm/tegra/dc.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index 965088afcfad..03adb4cf325b 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -1670,6 +1670,11 @@ static void tegra_dc_commit_state(struct tegra_dc *dc,
dev_err(dc->dev,
"failed to set clock rate to %lu Hz\n",
state->pclk);
+
+ err = clk_set_rate(dc->clk, state->pclk);
+ if (err < 0)
+ dev_err(dc->dev, "failed to set clock %pC to %lu Hz: %d\n",
+ dc->clk, state->pclk, err);
}
DRM_DEBUG_KMS("rate: %lu, div: %u\n", clk_get_rate(dc->clk),
@@ -1680,11 +1685,6 @@ static void tegra_dc_commit_state(struct tegra_dc *dc,
value = SHIFT_CLK_DIVIDER(state->div) | PIXEL_CLK_DIVIDER_PCD1;
tegra_dc_writel(dc, value, DC_DISP_DISP_CLOCK_CONTROL);
}
-
- err = clk_set_rate(dc->clk, state->pclk);
- if (err < 0)
- dev_err(dc->dev, "failed to set clock %pC to %lu Hz: %d\n",
- dc->clk, state->pclk, err);
}
static void tegra_dc_stop(struct tegra_dc *dc)
--
2.30.2
From: Zihao Yu <[email protected]>
[ Upstream commit ac8d0b901f0033b783156ab2dc1a0e73ec42409b ]
In RV64, the size of each entry in excp_vect_table is 8 bytes. If the
base of the table is not 8-byte aligned, loading an entry in the table
will raise a misaligned exception. Although such exception will be
handled by opensbi/bbl, this still causes performance degradation.
Signed-off-by: Zihao Yu <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
Signed-off-by: Palmer Dabbelt <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
---
arch/riscv/kernel/entry.S | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/riscv/kernel/entry.S b/arch/riscv/kernel/entry.S
index a03821b2656a..d9de22686e27 100644
--- a/arch/riscv/kernel/entry.S
+++ b/arch/riscv/kernel/entry.S
@@ -449,6 +449,7 @@ ENDPROC(__fstate_restore)
.section ".rodata"
+ .align LGREG
/* Exception vector table */
ENTRY(excp_vect_table)
RISCV_PTR do_trap_insn_misaligned
--
2.30.2
From: "Matthew Wilcox (Oracle)" <[email protected]>
[ Upstream commit dd841a749d1ded8e2e5facc4242ee0b6779fc0cb ]
Introducing local_lock broke compilation; fix it all up.
Signed-off-by: Matthew Wilcox (Oracle) <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
---
tools/testing/radix-tree/linux/compiler_types.h | 0
1 file changed, 0 insertions(+), 0 deletions(-)
delete mode 100644 tools/testing/radix-tree/linux/compiler_types.h
diff --git a/tools/testing/radix-tree/linux/compiler_types.h b/tools/testing/radix-tree/linux/compiler_types.h
deleted file mode 100644
index e69de29bb2d1..000000000000
--
2.30.2
From: Bob Peterson <[email protected]>
[ Upstream commit ff132c5f93c06bd4432bbab5c369e468653bdec4 ]
Before this patch, gfs2's freeze function failed to report an error
when the target file system was already frozen as it should (and as
generic vfs function freeze_super does. Similarly, gfs2's thaw function
failed to report an error when trying to thaw a file system that is not
frozen, as vfs function thaw_super does. The errors were checked, but
it always returned a 0 return code.
This patch adds the missing error return codes to gfs2 freeze and thaw.
Signed-off-by: Bob Peterson <[email protected]>
Signed-off-by: Andreas Gruenbacher <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
---
fs/gfs2/super.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 22cd68bd8c9b..3cc2237e5896 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -1000,11 +1000,13 @@ void gfs2_freeze_func(struct work_struct *work)
static int gfs2_freeze(struct super_block *sb)
{
struct gfs2_sbd *sdp = sb->s_fs_info;
- int error = 0;
+ int error;
mutex_lock(&sdp->sd_freeze_mutex);
- if (atomic_read(&sdp->sd_freeze_state) != SFS_UNFROZEN)
+ if (atomic_read(&sdp->sd_freeze_state) != SFS_UNFROZEN) {
+ error = -EBUSY;
goto out;
+ }
if (test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) {
error = -EINVAL;
@@ -1046,10 +1048,10 @@ static int gfs2_unfreeze(struct super_block *sb)
struct gfs2_sbd *sdp = sb->s_fs_info;
mutex_lock(&sdp->sd_freeze_mutex);
- if (atomic_read(&sdp->sd_freeze_state) != SFS_FROZEN ||
+ if (atomic_read(&sdp->sd_freeze_state) != SFS_FROZEN ||
!gfs2_holder_initialized(&sdp->sd_freeze_gh)) {
mutex_unlock(&sdp->sd_freeze_mutex);
- return 0;
+ return -EINVAL;
}
gfs2_glock_dq_uninit(&sdp->sd_freeze_gh);
--
2.30.2
From: Suzuki K Poulose <[email protected]>
[ Upstream commit a354a64d91eec3e0f8ef0eed575b480fd75b999c ]
Disable guest access to the Trace Filter control registers.
We do not advertise the Trace filter feature to the guest
(ID_AA64DFR0_EL1: TRACE_FILT is cleared) already, but the guest
can still access the TRFCR_EL1 unless we trap it.
This will also make sure that the guest cannot fiddle with
the filtering controls set by a nvhe host.
Cc: Marc Zyngier <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Catalin Marinas <[email protected]>
Signed-off-by: Suzuki K Poulose <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Sasha Levin <[email protected]>
---
arch/arm64/include/asm/kvm_arm.h | 1 +
arch/arm64/kvm/debug.c | 2 ++
2 files changed, 3 insertions(+)
diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h
index a3b6f58d188c..6d43f7901da2 100644
--- a/arch/arm64/include/asm/kvm_arm.h
+++ b/arch/arm64/include/asm/kvm_arm.h
@@ -198,6 +198,7 @@
#define CPTR_EL2_DEFAULT CPTR_EL2_RES1
/* Hyp Debug Configuration Register bits */
+#define MDCR_EL2_TTRF (1 << 19)
#define MDCR_EL2_TPMS (1 << 14)
#define MDCR_EL2_E2PB_MASK (UL(0x3))
#define MDCR_EL2_E2PB_SHIFT (UL(12))
diff --git a/arch/arm64/kvm/debug.c b/arch/arm64/kvm/debug.c
index 4e722d73a3c3..3606f6b89094 100644
--- a/arch/arm64/kvm/debug.c
+++ b/arch/arm64/kvm/debug.c
@@ -100,6 +100,7 @@ void kvm_arm_reset_debug_ptr(struct kvm_vcpu *vcpu)
* - Debug ROM Address (MDCR_EL2_TDRA)
* - OS related registers (MDCR_EL2_TDOSA)
* - Statistical profiler (MDCR_EL2_TPMS/MDCR_EL2_E2PB)
+ * - Self-hosted Trace Filter controls (MDCR_EL2_TTRF)
*
* Additionally, KVM only traps guest accesses to the debug registers if
* the guest is not actively using them (see the KVM_ARM64_DEBUG_DIRTY
@@ -123,6 +124,7 @@ void kvm_arm_setup_debug(struct kvm_vcpu *vcpu)
vcpu->arch.mdcr_el2 = __this_cpu_read(mdcr_el2) & MDCR_EL2_HPMN_MASK;
vcpu->arch.mdcr_el2 |= (MDCR_EL2_TPM |
MDCR_EL2_TPMS |
+ MDCR_EL2_TTRF |
MDCR_EL2_TPMCR |
MDCR_EL2_TDRA |
MDCR_EL2_TDOSA);
--
2.30.2
From: Arnd Bergmann <[email protected]>
[ Upstream commit 33ce7f2f95cabb5834cf0906308a5cb6103976da ]
When CONFIG_OF is disabled, building with 'make W=1' produces warnings
about out of bounds array access:
drivers/gpu/drm/imx/imx-ldb.c: In function 'imx_ldb_set_clock.constprop':
drivers/gpu/drm/imx/imx-ldb.c:186:8: error: array subscript -22 is below array bounds of 'struct clk *[4]' [-Werror=array-bounds]
Add an error check before the index is used, which helps with the
warning, as well as any possible other error condition that may be
triggered at runtime.
The warning could be fixed by adding a Kconfig depedency on CONFIG_OF,
but Liu Ying points out that the driver may hit the out-of-bounds
problem at runtime anyway.
Signed-off-by: Arnd Bergmann <[email protected]>
Reviewed-by: Liu Ying <[email protected]>
Signed-off-by: Philipp Zabel <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
---
drivers/gpu/drm/imx/imx-ldb.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/gpu/drm/imx/imx-ldb.c b/drivers/gpu/drm/imx/imx-ldb.c
index 221a8cbc57f9..a4dba034dca4 100644
--- a/drivers/gpu/drm/imx/imx-ldb.c
+++ b/drivers/gpu/drm/imx/imx-ldb.c
@@ -206,6 +206,11 @@ static void imx_ldb_encoder_enable(struct drm_encoder *encoder)
int dual = ldb->ldb_ctrl & LDB_SPLIT_MODE_EN;
int mux = drm_of_encoder_active_port_id(imx_ldb_ch->child, encoder);
+ if (mux < 0 || mux >= ARRAY_SIZE(ldb->clk_sel)) {
+ dev_warn(ldb->dev, "%s: invalid mux %d\n", __func__, mux);
+ return;
+ }
+
drm_panel_prepare(imx_ldb_ch->panel);
if (dual) {
@@ -264,6 +269,11 @@ imx_ldb_encoder_atomic_mode_set(struct drm_encoder *encoder,
int mux = drm_of_encoder_active_port_id(imx_ldb_ch->child, encoder);
u32 bus_format = imx_ldb_ch->bus_format;
+ if (mux < 0 || mux >= ARRAY_SIZE(ldb->clk_sel)) {
+ dev_warn(ldb->dev, "%s: invalid mux %d\n", __func__, mux);
+ return;
+ }
+
if (mode->clock > 170000) {
dev_warn(ldb->dev,
"%s: mode exceeds 170 MHz pixel clock\n", __func__);
--
2.30.2
On Mon, Apr 05, 2021 at 12:05:13PM -0400, Sasha Levin wrote:
> From: "Matthew Wilcox (Oracle)" <[email protected]>
>
> [ Upstream commit dd841a749d1ded8e2e5facc4242ee0b6779fc0cb ]
>
> Introducing local_lock broke compilation; fix it all up.
I don't think local_lock has been backported to 4.19?
On Mon, Apr 05, 2021 at 07:11:09PM +0100, Matthew Wilcox wrote:
>On Mon, Apr 05, 2021 at 12:05:13PM -0400, Sasha Levin wrote:
>> From: "Matthew Wilcox (Oracle)" <[email protected]>
>>
>> [ Upstream commit dd841a749d1ded8e2e5facc4242ee0b6779fc0cb ]
>>
>> Introducing local_lock broke compilation; fix it all up.
>
>I don't think local_lock has been backported to 4.19?
Heh, right, I'll drop it from 5.4 and older.
--
Thanks,
Sasha