The HP Elite mt645 thin client exhibits resume times of over one minute when using the normal nvme resume path. BIOS has tried to work around this by setting the "StorageD3Enable" ACPI property, but only if it detected the "Linux-HPI-Hybrid-Graphics" _OSI() flag. This flag does not exist, so the BIOS workaround can't work.
Instead, just set NVME_QUIRK_SIMPLE_SUSPEND when running on an mt645. The DMI_PRODUCT_NAME cannot be used because this string can be changed in the field. Match against DMI_BOARD_NAME, which should be immutable.
Cc: stable@vger.kernel.org Signed-off-by: Alexandru Gagniuc alexandru.gagniuc@hp.com --- drivers/nvme/host/pci.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 492f319ebdf3..25b59f5ce874 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -2897,6 +2897,15 @@ static unsigned long check_vendor_combination_bug(struct pci_dev *pdev) if ((dmi_match(DMI_BOARD_VENDOR, "LENOVO")) && dmi_match(DMI_BOARD_NAME, "LNVNB161216")) return NVME_QUIRK_SIMPLE_SUSPEND; + } else if (dmi_match(DMI_SYS_VENDOR, "HP") && + (dmi_match(DMI_BOARD_NAME, "8B0F") || + dmi_match(DMI_BOARD_NAME, "8B59"))) { + /* + * Force simple suspend to work around long resume latencies + * (1 minute or longer). + */ + dev_info(&pdev->dev, "simple suspend quirk for HP mt645\n"); + return NVME_QUIRK_SIMPLE_SUSPEND; }
return 0;
On 7/6/2023 1:06 PM, Alexandru Gagniuc wrote:
The HP Elite mt645 thin client exhibits resume times of over one minute when using the normal nvme resume path.
Is this the specific product you're referring to?
https://www.amd.com/system/files/documents/hp-elite-mt645-g7-mobile-thin-cli...
BIOS has tried to work around this by setting the "StorageD3Enable" ACPI property, but only if it detected the "Linux-HPI-Hybrid-Graphics" _OSI() flag. This flag does not exist, so the BIOS workaround can't work.
Instead, just set NVME_QUIRK_SIMPLE_SUSPEND when running on an mt645. The DMI_PRODUCT_NAME cannot be used because this string can be changed in the field. Match against DMI_BOARD_NAME, which should be immutable.
I'm quite confused why this is necessary. If the product link I sent above is correct, this is an AMD Barcelo APU.
Cezanne and Barcelo report as the exact same X86 model.
Cezanne will already always identify as simple suspend due to bugs that were reported on some other machines. It's been this way since kernel 6.3-rc1.
e2a56364485e ("ACPI: x86: utils: Add Cezanne to the list for forcing StorageD3Enable")
Cc: stable@vger.kernel.org Signed-off-by: Alexandru Gagniuc alexandru.gagniuc@hp.com
drivers/nvme/host/pci.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 492f319ebdf3..25b59f5ce874 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -2897,6 +2897,15 @@ static unsigned long check_vendor_combination_bug(struct pci_dev *pdev) if ((dmi_match(DMI_BOARD_VENDOR, "LENOVO")) && dmi_match(DMI_BOARD_NAME, "LNVNB161216")) return NVME_QUIRK_SIMPLE_SUSPEND;
- } else if (dmi_match(DMI_SYS_VENDOR, "HP") &&
(dmi_match(DMI_BOARD_NAME, "8B0F") ||dmi_match(DMI_BOARD_NAME, "8B59"))) {/** Force simple suspend to work around long resume latencies* (1 minute or longer).*/dev_info(&pdev->dev, "simple suspend quirk for HP mt645\n");return NVME_QUIRK_SIMPLE_SUSPEND;return 0;
________________________________________ From: Limonciello, Mario mario.limonciello@amd.com Sent: Friday, July 7, 2023 11:28 PM To: Gagniuc, Alexandru; linux-nvme@lists.infradead.org Cc: kbusch@kernel.org; axboe@fb.com; hch@lst.de; sagi@grimberg.me; linux-kernel@vger.kernel.org; Zhang, Eniac; stable@vger.kernel.org Subject: Re: [PATCH] nvme-pci: Add suspend quirk for HP mt645 thin client
CAUTION: External Email
On 7/6/2023 1:06 PM, Alexandru Gagniuc wrote:
The HP Elite mt645 thin client exhibits resume times of over one minute when using the normal nvme resume path.
Is this the specific product you're referring to?
https://www.amd.com/system/files/documents/hp-elite-mt645-g7-mobile-thin-cli...https://www.amd.com/system/files/documents/hp-elite-mt645-g7-mobile-thin-client.pdf
BIOS has tried to work around this by setting the "StorageD3Enable" ACPI property, but only if it detected the "Linux-HPI-Hybrid-Graphics" _OSI() flag. This flag does not exist, so the BIOS workaround can't work.
Instead, just set NVME_QUIRK_SIMPLE_SUSPEND when running on an mt645. The DMI_PRODUCT_NAME cannot be used because this string can be changed in the field. Match against DMI_BOARD_NAME, which should be immutable.
I'm quite confused why this is necessary. If the product link I sent above is correct, this is an AMD Barcelo APU.
Cezanne and Barcelo report as the exact same X86 model.
Cezanne will already always identify as simple suspend due to bugs that were reported on some other machines. It's been this way since kernel 6.3-rc1.
e2a56364485e ("ACPI: x86: utils: Add Cezanne to the list for forcing StorageD3Enable") [snip]
Hi Mario,
The product link you posted is correct. I was not aware of e2a56364485e when I developed the fix herein before v6.3. After some quick testing, I can confirm that e2a56364485e solves the original issue.
We do not need this patch then.
Thank you, Alex
On 7/10/2023 3:06 PM, Gagniuc, Alexandru wrote:
[snip] Hi Mario,
The product link you posted is correct. I was not aware of e2a56364485e when I developed the fix herein before v6.3. After some quick testing, I can confirm that e2a56364485e solves the original issue.
We do not need this patch then.
Thank you, Alex
Great, thanks for confirming. Just as an FYI to you we don't have any intention to grow that list any further. Those were added because the platforms came at a time that StorageD3Enable was just being introduced and there were bugs with too many missing it.
If you have future AMD based products that use newer hardware such as Rembrandt or Phoenix that you need to fix this in the BIOS properly.
linux-stable-mirror@lists.linaro.org
-
Alexandru Gagniuc -
Gagniuc, Alexandru
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Limonciello, Mario