diff options
author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-29 13:15:53 +0200 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-29 13:15:53 +0200 |
commit | 7e78cf3d5fbcb29e56efc1c78f990240bd902a61 (patch) | |
tree | 86767d2bf4a7c6e36c2a13c6753ba8ef47f9ac23 | |
parent | 97373ae32d46a563276632f7eddd8e31ca03e966 (diff) | |
download | stable-queue-7e78cf3d5fbcb29e56efc1c78f990240bd902a61.tar.gz |
6.8-stable patches
added patches:
x86-cpu-amd-add-models-0x10-0x1f-to-the-zen5-range.patch
x86-cpu-fix-check-for-rdpkru-in-__show_regs.patch
-rw-r--r-- | queue-6.8/series | 2 | ||||
-rw-r--r-- | queue-6.8/x86-cpu-amd-add-models-0x10-0x1f-to-the-zen5-range.patch | 32 | ||||
-rw-r--r-- | queue-6.8/x86-cpu-fix-check-for-rdpkru-in-__show_regs.patch | 42 |
3 files changed, 76 insertions, 0 deletions
diff --git a/queue-6.8/series b/queue-6.8/series index 8134a8df9c..37e62271ef 100644 --- a/queue-6.8/series +++ b/queue-6.8/series @@ -129,3 +129,5 @@ drm-amdgpu-fix-visible-vram-handling-during-faults.patch selftests-seccomp-user_notification_addfd-check-nextfd-is-available.patch selftests-seccomp-change-the-syscall-used-in-kill_thread-test.patch selftests-seccomp-handle-einval-on-unshare-clone_newpid.patch +x86-cpu-amd-add-models-0x10-0x1f-to-the-zen5-range.patch +x86-cpu-fix-check-for-rdpkru-in-__show_regs.patch diff --git a/queue-6.8/x86-cpu-amd-add-models-0x10-0x1f-to-the-zen5-range.patch b/queue-6.8/x86-cpu-amd-add-models-0x10-0x1f-to-the-zen5-range.patch new file mode 100644 index 0000000000..8f0c773389 --- /dev/null +++ b/queue-6.8/x86-cpu-amd-add-models-0x10-0x1f-to-the-zen5-range.patch @@ -0,0 +1,32 @@ +From 2718a7fdf292b2dcb49c856fa8a6a955ebbbc45f Mon Sep 17 00:00:00 2001 +From: Wenkuan Wang <Wenkuan.Wang@amd.com> +Date: Wed, 10 Apr 2024 11:53:08 +0800 +Subject: x86/CPU/AMD: Add models 0x10-0x1f to the Zen5 range + +From: Wenkuan Wang <Wenkuan.Wang@amd.com> + +commit 2718a7fdf292b2dcb49c856fa8a6a955ebbbc45f upstream. + +Add some more Zen5 models. + +Fixes: 3e4147f33f8b ("x86/CPU/AMD: Add X86_FEATURE_ZEN5") +Signed-off-by: Wenkuan Wang <Wenkuan.Wang@amd.com> +Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> +Link: https://lore.kernel.org/r/20240423144111.1362-1-bp@kernel.org +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + arch/x86/kernel/cpu/amd.c | 3 +-- + 1 file changed, 1 insertion(+), 2 deletions(-) + +--- a/arch/x86/kernel/cpu/amd.c ++++ b/arch/x86/kernel/cpu/amd.c +@@ -572,8 +572,7 @@ static void bsp_init_amd(struct cpuinfo_ + + case 0x1a: + switch (c->x86_model) { +- case 0x00 ... 0x0f: +- case 0x20 ... 0x2f: ++ case 0x00 ... 0x2f: + case 0x40 ... 0x4f: + case 0x70 ... 0x7f: + setup_force_cpu_cap(X86_FEATURE_ZEN5); diff --git a/queue-6.8/x86-cpu-fix-check-for-rdpkru-in-__show_regs.patch b/queue-6.8/x86-cpu-fix-check-for-rdpkru-in-__show_regs.patch new file mode 100644 index 0000000000..88b15ae799 --- /dev/null +++ b/queue-6.8/x86-cpu-fix-check-for-rdpkru-in-__show_regs.patch @@ -0,0 +1,42 @@ +From b53c6bd5d271d023857174b8fd3e32f98ae51372 Mon Sep 17 00:00:00 2001 +From: David Kaplan <david.kaplan@amd.com> +Date: Sun, 21 Apr 2024 21:17:28 +0200 +Subject: x86/cpu: Fix check for RDPKRU in __show_regs() + +From: David Kaplan <david.kaplan@amd.com> + +commit b53c6bd5d271d023857174b8fd3e32f98ae51372 upstream. + +cpu_feature_enabled(X86_FEATURE_OSPKE) does not necessarily reflect +whether CR4.PKE is set on the CPU. In particular, they may differ on +non-BSP CPUs before setup_pku() is executed. In this scenario, RDPKRU +will #UD causing the system to hang. + +Fix by checking CR4 for PKE enablement which is always correct for the +current CPU. + +The scenario happens by inserting a WARN* before setup_pku() in +identiy_cpu() or some other diagnostic which would lead to calling +__show_regs(). + + [ bp: Massage commit message. ] + +Signed-off-by: David Kaplan <david.kaplan@amd.com> +Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> +Link: https://lore.kernel.org/r/20240421191728.32239-1-bp@kernel.org +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + arch/x86/kernel/process_64.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/arch/x86/kernel/process_64.c ++++ b/arch/x86/kernel/process_64.c +@@ -138,7 +138,7 @@ void __show_regs(struct pt_regs *regs, e + log_lvl, d3, d6, d7); + } + +- if (cpu_feature_enabled(X86_FEATURE_OSPKE)) ++ if (cr4 & X86_CR4_PKE) + printk("%sPKRU: %08x\n", log_lvl, read_pkru()); + } + |