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17:30, “William Roche wrote: > From: William Roche > > Thank you very much Yazen for your review and all the suggestions! > > v2 changes: > - Commit title changed to: > x86/mce/amd: Fix VM crash during deferred error handling > - Commit message with capitalized QEMU and KVM as well as the imperative > statement suggested by Yazen > - "CC stable" tag placed after "Signed-off-by" > (The documentation asks for "the sign-off area" without more details) > - blank line added to separate SCMA code block and the update of > MCA_STATUS. > > -- > > After the integration of the following commit: > 7cb735d7c0cb x86/mce: Unify AMD DFR handler with MCA Polling > > AMD Qemu VM started to crash when dealing with deferred memory error > injection with a stack trace like: > > mce: MSR access error: WRMSR to 0xc0002098 (tried to write 0x0000000000000000) > at rIP: 0xffffffff8229894d (mce_wrmsrq+0x1d/0x60) > > amd_clear_bank+0x6e/0x70 > machine_check_poll+0x228/0x2e0 > ? __pfx_mce_timer_fn+0x10/0x10 > mce_timer_fn+0xb1/0x130 > ? __pfx_mce_timer_fn+0x10/0x10 > call_timer_fn+0x26/0x120 > __run_timers+0x202/0x290 > run_timer_softirq+0x49/0x100 > handle_softirqs+0xeb/0x2c0 > __irq_exit_rcu+0xda/0x100 > sysvec_apic_timer_interrupt+0x71/0x90 > [...] > Kernel panic - not syncing: MCA architectural violation! > > See the discussion at: > https://lore.kernel.org/all/48d8e1c8-1eb9-49cc-8de8-78077f29c203@oracle.com/ > > We identified a problem with SMCA specific registers access from > non-SMCA platforms like a QEMU/KVM machine. > > This patch is checkpatch.pl clean. > Unit test of memory error injection works fine with it. > > > William Roche (1): > x86/mce/amd: Fix VM crash during deferred error handling > > arch/x86/kernel/cpu/mce/amd.c | 17 +++++++++++------ > 1 file changed, 11 insertions(+), 6 deletions(-) > Hello, This fix has been reviewed by Yazen Ghannam. The code tested with QEMU/KVM virtual machines on AMD platforms. The commit that is fixed here (7cb735d7c0cb) is present in the stable branch linux-6.19.y. Could you please let me know if anything is missing to integrate this fix ? Thanks in advance for your feedback, William.