August 2022 - Linux-stable-mirror

[PATCH v2] sparc64: NMI watchdog: fix return value of __setup handler

by Randy Dunlap

__setup() handlers should return 1 to obsolete_checksetup() in init/main.c to indicate that the boot option has been handled. A return of 0 causes the boot option/value to be listed as an Unknown kernel parameter and added to init's (limited) argument or environment strings. Also, error return codes don't mean anything to obsolete_checksetup() -- only non-zero (usually 1) or zero. So return 1 from setup_nmi_watchdog(). Fixes: e5553a6d0442 ("sparc64: Implement NMI watchdog on capable cpus.") Signed-off-by: Randy Dunlap <rdunlap(a)infradead.org> Reported-by: Igor Zhbanov <i.zhbanov(a)omprussia.ru> Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@omprussia.ru Cc: "David S. Miller" <davem(a)davemloft.net> Cc: sparclinux(a)vger.kernel.org Cc: Sam Ravnborg <sam(a)ravnborg.org> Cc: Andrew Morton <akpm(a)linux-foundation.org> Cc: stable(a)vger.kernel.org --- v2: change From" Igor to Reported-by: add more Cc's arch/sparc/kernel/nmi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/sparc/kernel/nmi.c +++ b/arch/sparc/kernel/nmi.c @@ -274,7 +274,7 @@ static int __init setup_nmi_watchdog(cha if (!strncmp(str, "panic", 5)) panic_on_timeout = 1; - return 0; + return 1; } __setup("nmi_watchdog=", setup_nmi_watchdog);

1 year, 11 months

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[PATCH 1/3] slimbus: qcom-ngd: use correct error in message of pdr_add_lookup() failure

by Krzysztof Kozlowski

Use cprrect error code, instead of previous 'ret' value, when printing error from pdr_add_lookup() failure. Cc: <stable(a)vger.kernel.org> Fixes: e1ae85e1830e ("slimbus: qcom-ngd-ctrl: add Protection Domain Restart Support") Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski(a)linaro.org> --- drivers/slimbus/qcom-ngd-ctrl.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/slimbus/qcom-ngd-ctrl.c b/drivers/slimbus/qcom-ngd-ctrl.c index 0aa8408464ad..6fe6abb86061 100644 --- a/drivers/slimbus/qcom-ngd-ctrl.c +++ b/drivers/slimbus/qcom-ngd-ctrl.c @@ -1581,6 +1581,7 @@ static int qcom_slim_ngd_ctrl_probe(struct platform_device *pdev) pds = pdr_add_lookup(ctrl->pdr, "avs/audio", "msm/adsp/audio_pd"); if (IS_ERR(pds) && PTR_ERR(pds) != -EALREADY) { + ret = PTR_ERR(pds); dev_err(dev, "pdr add lookup failed: %d\n", ret); return PTR_ERR(pds); } -- 2.34.1

1 year, 11 months

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[PATCH AUTOSEL 4.9 1/6] firmware: dmi: Use the proper accessor for the version field

by Sasha Levin

From: Andy Shevchenko <andriy.shevchenko(a)linux.intel.com> [ Upstream commit d2139dfca361a1f5bfc4d4a23455b1a409a69cd4 ] The byte at offset 6 represents length. Don't take it and drop it immediately by using proper accessor, i.e. get_unaligned_be24(). [JD: Change the subject to something less frightening] Signed-off-by: Andy Shevchenko <andriy.shevchenko(a)linux.intel.com> Signed-off-by: Jean Delvare <jdelvare(a)suse.de> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/firmware/dmi_scan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c index 42844c318445e..1727d7eaf2413 100644 --- a/drivers/firmware/dmi_scan.c +++ b/drivers/firmware/dmi_scan.c @@ -572,7 +572,7 @@ static int __init dmi_smbios3_present(const u8 *buf) { if (memcmp(buf, "_SM3_", 5) == 0 && buf[6] < 32 && dmi_checksum(buf, buf[6])) { - dmi_ver = get_unaligned_be32(buf + 6) & 0xFFFFFF; + dmi_ver = get_unaligned_be24(buf + 7); dmi_num = 0; /* No longer specified */ dmi_len = get_unaligned_le32(buf + 12); dmi_base = get_unaligned_le64(buf + 16); -- 2.35.1

1 year, 11 months

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[PATCH AUTOSEL 4.14 1/8] firmware: dmi: Use the proper accessor for the version field

by Sasha Levin

From: Andy Shevchenko <andriy.shevchenko(a)linux.intel.com> [ Upstream commit d2139dfca361a1f5bfc4d4a23455b1a409a69cd4 ] The byte at offset 6 represents length. Don't take it and drop it immediately by using proper accessor, i.e. get_unaligned_be24(). [JD: Change the subject to something less frightening] Signed-off-by: Andy Shevchenko <andriy.shevchenko(a)linux.intel.com> Signed-off-by: Jean Delvare <jdelvare(a)suse.de> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/firmware/dmi_scan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c index fe0d30340e963..d07a15462e252 100644 --- a/drivers/firmware/dmi_scan.c +++ b/drivers/firmware/dmi_scan.c @@ -582,7 +582,7 @@ static int __init dmi_smbios3_present(const u8 *buf) { if (memcmp(buf, "_SM3_", 5) == 0 && buf[6] < 32 && dmi_checksum(buf, buf[6])) { - dmi_ver = get_unaligned_be32(buf + 6) & 0xFFFFFF; + dmi_ver = get_unaligned_be24(buf + 7); dmi_num = 0; /* No longer specified */ dmi_len = get_unaligned_le32(buf + 12); dmi_base = get_unaligned_le64(buf + 16); -- 2.35.1

1 year, 11 months

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[PATCH AUTOSEL 4.19 01/10] firmware: dmi: Use the proper accessor for the version field

by Sasha Levin

From: Andy Shevchenko <andriy.shevchenko(a)linux.intel.com> [ Upstream commit d2139dfca361a1f5bfc4d4a23455b1a409a69cd4 ] The byte at offset 6 represents length. Don't take it and drop it immediately by using proper accessor, i.e. get_unaligned_be24(). [JD: Change the subject to something less frightening] Signed-off-by: Andy Shevchenko <andriy.shevchenko(a)linux.intel.com> Signed-off-by: Jean Delvare <jdelvare(a)suse.de> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/firmware/dmi_scan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c index 0dc0c78f1fdb2..c47680adbf367 100644 --- a/drivers/firmware/dmi_scan.c +++ b/drivers/firmware/dmi_scan.c @@ -595,7 +595,7 @@ static int __init dmi_smbios3_present(const u8 *buf) { if (memcmp(buf, "_SM3_", 5) == 0 && buf[6] < 32 && dmi_checksum(buf, buf[6])) { - dmi_ver = get_unaligned_be32(buf + 6) & 0xFFFFFF; + dmi_ver = get_unaligned_be24(buf + 7); dmi_num = 0; /* No longer specified */ dmi_len = get_unaligned_le32(buf + 12); dmi_base = get_unaligned_le64(buf + 16); -- 2.35.1

1 year, 11 months

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[PATCH AUTOSEL 5.4 01/12] firmware: dmi: Use the proper accessor for the version field

by Sasha Levin

From: Andy Shevchenko <andriy.shevchenko(a)linux.intel.com> [ Upstream commit d2139dfca361a1f5bfc4d4a23455b1a409a69cd4 ] The byte at offset 6 represents length. Don't take it and drop it immediately by using proper accessor, i.e. get_unaligned_be24(). [JD: Change the subject to something less frightening] Signed-off-by: Andy Shevchenko <andriy.shevchenko(a)linux.intel.com> Signed-off-by: Jean Delvare <jdelvare(a)suse.de> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/firmware/dmi_scan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c index 1e21fc3e9851a..70b7abbe1e4bf 100644 --- a/drivers/firmware/dmi_scan.c +++ b/drivers/firmware/dmi_scan.c @@ -593,7 +593,7 @@ static int __init dmi_smbios3_present(const u8 *buf) { if (memcmp(buf, "_SM3_", 5) == 0 && buf[6] < 32 && dmi_checksum(buf, buf[6])) { - dmi_ver = get_unaligned_be32(buf + 6) & 0xFFFFFF; + dmi_ver = get_unaligned_be24(buf + 7); dmi_num = 0; /* No longer specified */ dmi_len = get_unaligned_le32(buf + 12); dmi_base = get_unaligned_le64(buf + 16); -- 2.35.1

1 year, 11 months

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[PATCH AUTOSEL 5.10 01/16] firmware: dmi: Use the proper accessor for the version field

by Sasha Levin

From: Andy Shevchenko <andriy.shevchenko(a)linux.intel.com> [ Upstream commit d2139dfca361a1f5bfc4d4a23455b1a409a69cd4 ] The byte at offset 6 represents length. Don't take it and drop it immediately by using proper accessor, i.e. get_unaligned_be24(). [JD: Change the subject to something less frightening] Signed-off-by: Andy Shevchenko <andriy.shevchenko(a)linux.intel.com> Signed-off-by: Jean Delvare <jdelvare(a)suse.de> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/firmware/dmi_scan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c index d51ca0428bb82..bd43277dbb878 100644 --- a/drivers/firmware/dmi_scan.c +++ b/drivers/firmware/dmi_scan.c @@ -629,7 +629,7 @@ static int __init dmi_smbios3_present(const u8 *buf) { if (memcmp(buf, "_SM3_", 5) == 0 && buf[6] < 32 && dmi_checksum(buf, buf[6])) { - dmi_ver = get_unaligned_be32(buf + 6) & 0xFFFFFF; + dmi_ver = get_unaligned_be24(buf + 7); dmi_num = 0; /* No longer specified */ dmi_len = get_unaligned_le32(buf + 12); dmi_base = get_unaligned_le64(buf + 16); -- 2.35.1

1 year, 11 months

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[PATCH] arm64: errata: Add Cortex-A510 to the repeat tlbi list

by Lucas Wei

From: James Morse <james.morse(a)arm.com> Cortex-A510 is affected by an erratum where in rare circumstances the CPUs may not handle a race between a break-before-make sequence on one CPU, and another CPU accessing the same page. This could allow a store to a page that has been unmapped. Work around this by adding the affected CPUs to the list that needs TLB sequences to be done twice. Signed-off-by: James Morse <james.morse(a)arm.com> Link: https://lore.kernel.org/r/20220704155732.21216-1-james.morse@arm.com Signed-off-by: Will Deacon <will(a)kernel.org> --- Documentation/arm64/silicon-errata.rst | 2 ++ arch/arm64/Kconfig | 17 +++++++++++++++++ arch/arm64/kernel/cpu_errata.c | 8 +++++++- 3 files changed, 26 insertions(+), 1 deletion(-) diff --git a/Documentation/arm64/silicon-errata.rst b/Documentation/arm64/silicon-errata.rst index 0b4235b1f8c4..33b04db8408f 100644 --- a/Documentation/arm64/silicon-errata.rst +++ b/Documentation/arm64/silicon-errata.rst @@ -106,6 +106,8 @@ stable kernels. +----------------+-----------------+-----------------+-----------------------------+ | ARM | Cortex-A510 | #2077057 | ARM64_ERRATUM_2077057 | +----------------+-----------------+-----------------+-----------------------------+ +| ARM | Cortex-A510 | #2441009 | ARM64_ERRATUM_2441009 | ++----------------+-----------------+-----------------+-----------------------------+ | ARM | Cortex-A710 | #2119858 | ARM64_ERRATUM_2119858 | +----------------+-----------------+-----------------+-----------------------------+ | ARM | Cortex-A710 | #2054223 | ARM64_ERRATUM_2054223 | diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index a5d1b561ed53..001eaba5a6b4 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -838,6 +838,23 @@ config ARM64_ERRATUM_2224489 If unsure, say Y. +config ARM64_ERRATUM_2441009 + bool "Cortex-A510: Completion of affected memory accesses might not be guaranteed by completion of a TLBI" + default y + select ARM64_WORKAROUND_REPEAT_TLBI + help + This option adds a workaround for ARM Cortex-A510 erratum #2441009. + + Under very rare circumstances, affected Cortex-A510 CPUs + may not handle a race between a break-before-make sequence on one + CPU, and another CPU accessing the same page. This could allow a + store to a page that has been unmapped. + + Work around this by adding the affected CPUs to the list that needs + TLB sequences to be done twice. + + If unsure, say Y. + config ARM64_ERRATUM_2064142 bool "Cortex-A510: 2064142: workaround TRBE register writes while disabled" depends on CORESIGHT_TRBE diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c index 6b92989f4cc2..aa9609e6ca67 100644 --- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -211,6 +211,12 @@ static const struct arm64_cpu_capabilities arm64_repeat_tlbi_list[] = { /* Kryo4xx Gold (rcpe to rfpe) => (r0p0 to r3p0) */ ERRATA_MIDR_RANGE(MIDR_QCOM_KRYO_4XX_GOLD, 0xc, 0xe, 0xf, 0xe), }, +#endif +#ifdef CONFIG_ARM64_ERRATUM_2441009 + { + /* Cortex-A510 r0p0 -> r1p1. Fixed in r1p2 */ + ERRATA_MIDR_RANGE(MIDR_CORTEX_A510, 0, 0, 1, 1), + }, #endif {}, }; @@ -488,7 +494,7 @@ const struct arm64_cpu_capabilities arm64_errata[] = { #endif #ifdef CONFIG_ARM64_WORKAROUND_REPEAT_TLBI { - .desc = "Qualcomm erratum 1009, or ARM erratum 1286807", + .desc = "Qualcomm erratum 1009, or ARM erratum 1286807, 2441009", .capability = ARM64_WORKAROUND_REPEAT_TLBI, .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, .matches = cpucap_multi_entry_cap_matches, --

1 year, 11 months

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[PATCH] drm/i915/guc: clear stalled request after a reset

by Daniele Ceraolo Spurio

If the GuC CTs are full and we need to stall the request submission while waiting for space, we save the stalled request and where the stall occurred; when the CTs have space again we pick up the request submission from where we left off. If a full GT reset occurs, the state of all contexts is cleared and all non-guilty requests are unsubmitted, therefore we need to restart the stalled request submission from scratch. To make sure that we do so, clear the saved request after a reset. Fixes note: the patch that introduced the bug is in 5.15, but no officially supported platform had GuC submission enabled by default in that kernel, so the backport to that particular version (and only that one) can potentially be skipped. Fixes: 925dc1cf58ed ("drm/i915/guc: Implement GuC submission tasklet") Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio(a)intel.com> Cc: Matthew Brost <matthew.brost(a)intel.com> Cc: John Harrison <john.c.harrison(a)intel.com> Cc: <stable(a)vger.kernel.org> # v5.15+ --- drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c index 0d17da77e787..0d56b615bf78 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c @@ -4002,6 +4002,13 @@ static inline void guc_init_lrc_mapping(struct intel_guc *guc) /* make sure all descriptors are clean... */ xa_destroy(&guc->context_lookup); + /* + * A reset might have occurred while we had a pending stalled request, + * so make sure we clean that up. + */ + guc->stalled_request = NULL; + guc->submission_stall_reason = STALL_NONE; + /* * Some contexts might have been pinned before we enabled GuC * submission, so we need to add them to the GuC bookeeping. -- 2.25.1

1 year, 11 months

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[PATCH] x86/speculation: Avoid LFENCE in FILL_RETURN_BUFFER on CPUs that lack it

by Ben Hutchings

From: Ben Hutchings <benh(a)debian.org> The mitigation for PBRSB includes adding LFENCE instructions to the RSB filling sequence. However, RSB filling is done on some older CPUs that don't support the LFENCE instruction. Define and use a BARRIER_NOSPEC macro which makes the LFENCE conditional on X86_FEATURE_LFENCE_RDTSC, like the barrier_nospec() macro defined for C code in <asm/barrier.h>. Reported-by: Martin-Éric Racine <martin-eric.racine(a)iki.fi> References: https://bugs.debian.org/1017425 Cc: stable(a)vger.kernel.org Cc: regressions(a)lists.linux.dev Cc: Daniel Sneddon <daniel.sneddon(a)linux.intel.com> Cc: Pawan Gupta <pawan.kumar.gupta(a)linux.intel.com> Fixes: 2b1299322016 ("x86/speculation: Add RSB VM Exit protections") Fixes: ba6e31af2be9 ("x86/speculation: Add LFENCE to RSB fill sequence") Signed-off-by: Ben Hutchings <benh(a)debian.org> --- Re-sending this with properly matched From address and server. Apologies if you got 2 copies. Ben. arch/x86/include/asm/nospec-branch.h | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/arch/x86/include/asm/nospec-branch.h b/arch/x86/include/asm/nospec-branch.h index e64fd20778b6..b1029fd88474 100644 --- a/arch/x86/include/asm/nospec-branch.h +++ b/arch/x86/include/asm/nospec-branch.h @@ -34,6 +34,11 @@ #define RSB_CLEAR_LOOPS 32 /* To forcibly overwrite all entries */ +#ifdef __ASSEMBLY__ + +/* Prevent speculative execution past this barrier. */ +#define BARRIER_NOSPEC ALTERNATIVE "", "lfence", X86_FEATURE_LFENCE_RDTSC + /* * Google experimented with loop-unrolling and this turned out to be * the optimal version - two calls, each with their own speculation @@ -62,9 +67,7 @@ dec reg; \ jnz 771b; \ /* barrier for jnz misprediction */ \ - lfence; - -#ifdef __ASSEMBLY__ + BARRIER_NOSPEC; /* * This should be used immediately before an indirect jump/call. It tells @@ -138,7 +141,7 @@ int3 .Lunbalanced_ret_guard_\@: add $(BITS_PER_LONG/8), %_ASM_SP - lfence + BARRIER_NOSPEC .endm /*

1 year, 11 months

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Linux-stable-mirror August 2022