diff options
| author |   Thomas Zimmermann <tzimmermann@suse.de> | 2022-11-05 16:02:42 +0100 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2022-11-05 16:08:36 +0100 |
| commit | 8e4e4c2f53ffcb0ef746dc3b87ce1a57c5c94c7d (patch) | |
| tree | a61fbc998223d50f8b8691b9b9ced38c21072b10 /arch/x86/kernel/cpu/microcode/amd.c | |
| parent | drm/ofdrm: Cast error pointers to void __iomem * (diff) | |
| parent | Merge tag 'drm-intel-gt-next-2022-11-03' of git://anongit.freedesktop.org/drm/drm-intel into drm-next (diff) | |
| download | wireguard-linux-8e4e4c2f53ffcb0ef746dc3b87ce1a57c5c94c7d.tar.xz wireguard-linux-8e4e4c2f53ffcb0ef746dc3b87ce1a57c5c94c7d.zip | |
Merge drm/drm-next into drm-misc-next
Backmerging drm/drm-next to get the latest changes in the xlnx driver.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Diffstat (limited to 'arch/x86/kernel/cpu/microcode/amd.c')
| -rw-r--r-- | arch/x86/kernel/cpu/microcode/amd.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c index e7410e98fc1f..3a35dec3ec55 100644 --- a/arch/x86/kernel/cpu/microcode/amd.c +++ b/arch/x86/kernel/cpu/microcode/amd.c @@ -440,7 +440,13 @@ apply_microcode_early_amd(u32 cpuid_1_eax, void *ucode, size_t size, bool save_p return ret; native_rdmsr(MSR_AMD64_PATCH_LEVEL, rev, dummy); - if (rev >= mc->hdr.patch_id) + + /* + * Allow application of the same revision to pick up SMT-specific + * changes even if the revision of the other SMT thread is already + * up-to-date. + */ + if (rev > mc->hdr.patch_id) return ret; if (!__apply_microcode_amd(mc)) { @@ -528,8 +534,12 @@ void load_ucode_amd_ap(unsigned int cpuid_1_eax) native_rdmsr(MSR_AMD64_PATCH_LEVEL, rev, dummy); - /* Check whether we have saved a new patch already: */ - if (*new_rev && rev < mc->hdr.patch_id) { + /* + * Check whether a new patch has been saved already. Also, allow application of + * the same revision in order to pick up SMT-thread-specific configuration even + * if the sibling SMT thread already has an up-to-date revision. + */ + if (*new_rev && rev <= mc->hdr.patch_id) { if (!__apply_microcode_amd(mc)) { *new_rev = mc->hdr.patch_id; return; |