Re: [PATCH] device-dax: map dax memory as decrypted in CoCo guests

Confidential Computing (CoCo) guests encrypt private memory by default. DAX memory regions allow a guest to bypass its own (private) page cache and instead use host memory, which is not private to the guest. Commit 867400af90f1 ("mm/memremap.c: map FS_DAX device memory as decrypted") only ensures

Re: [PATCH] device-dax: map dax memory as decrypted in CoCo guests

On 8/26/2024 11:35 PM, Kevin Loughlin wrote: How can I test this? Can I test it with virtio-pmem device? Correct. Assuming the CoCo guest accesses some virtio-pmem device in devdax mode, mmapping() this virtio-pmem device's memory region results in the guest and host reading the same (plaintext

Re: [PATCH] device-dax: map dax memory as decrypted in CoCo guests

On 9/10/2024 3:00 PM, Gupta, Pankaj wrote: On 8/26/2024 11:35 PM, Kevin Loughlin wrote: How can I test this? Can I test it with virtio-pmem device? Correct. Assuming the CoCo guest accesses some virtio-pmem device in devdax mode, mmapping() this virtio-pmem device's memory region resul

Re: [PATCH v2] virtio_pmem: populate numa information

+Cc [MST, virtualization-list] Hi Dan, MST, This patch is reviewed and tested. Is there anything that needs to be done from my side (e.g. sync with mainline)? If there are no further comments, Can we please merge this patch? Thank You, Pankaj (Adding my alternative email address to this t

Re: [PATCH v2] virtio_pmem: populate numa information

I'll take a look. Generally if you want my attention you should CC me on the patch. Sorry for that! Did not notice the entire Cc list earlier. Best regards, Pankaj

Re: [PATCH] vsock/virtio: use GFP_ATOMIC under RCU read lock

virtio_transport_send_pkt in now called on transport fast path, under RCU read lock. In that case, we have a bug: virtio_add_sgs is called with GFP_KERNEL, and might sleep. Pass the gfp flags as an argument, and use GFP_ATOMIC on the fast path. Link: https://lore.kernel.org/all/hfcr2aget2zojmqp

Re: [PATCH v8 03/10] KVM: selftests: Add vmgexit helper

On 3/5/2025 11:59 PM, Pratik R. Sampat wrote: Abstract rep vmmcall coded into the vmgexit helper for the sev library. No functional change intended. Signed-off-by: Pratik R. Sampat Reviewed-by: Pankaj Gupta --- tools/testing/selftests/kvm/include/x86/sev.h| 5 + tools/testing/s

Re: [PATCH] libnvdimm/labels: Fix divide error in nd_label_data_init()

On 3/19/2025 12:32 PM, Robert Richter wrote: If a CXL memory device returns a broken zero LSA size in its memory device information (Identify Memory Device (Opcode 4000h), CXL spec. 3.1, 8.2.9.9.1.1), a divide error occurs in the libnvdimm driver: Oops: divide error: [#1] PREEMPT SMP NOPT

[PATCH] driver: cpufreq: simplified goto out in cpufreq_register_driver

simplified goto out in cpufreq_register_driver for increasing code readability Signed-off-by: Pankaj Gupta Signed-off-by: Sanjeev Yadav --- diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index b87596b..0bc23f6 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufr