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Subject[tip: x86/bugs] x86/srso: Print mitigation for retbleed IBPB case
The following commit has been merged into the x86/bugs branch of tip:

Commit-ID: 8e7f2ef76ed2360dabe3ccd253042f9f9054db65
Gitweb: https://git.kernel.org/tip/8e7f2ef76ed2360dabe3ccd253042f9f9054db65
Author: Josh Poimboeuf <jpoimboe@kernel.org>
AuthorDate: Mon, 04 Sep 2023 22:04:51 -07:00
Committer: Ingo Molnar <mingo@kernel.org>
CommitterDate: Sat, 23 Sep 2023 14:13:02 +02:00

x86/srso: Print mitigation for retbleed IBPB case

When overriding the requested mitigation with IBPB due to retbleed=ibpb,
print the mitigation in the usual format instead of a custom error
message.

Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/ec3af919e267773d896c240faf30bfc6a1fd6304.1693889988.git.jpoimboe@kernel.org
---
arch/x86/kernel/cpu/bugs.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index 235c0e0..6c47f37 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -2425,9 +2425,8 @@ static void __init srso_select_mitigation(void)

if (retbleed_mitigation == RETBLEED_MITIGATION_IBPB) {
if (has_microcode) {
- pr_err("Retbleed IBPB mitigation enabled, using same for SRSO\n");
srso_mitigation = SRSO_MITIGATION_IBPB;
- goto pred_cmd;
+ goto out;
}
}

@@ -2490,7 +2489,8 @@ static void __init srso_select_mitigation(void)
break;
}

- pr_info("%s%s\n", srso_strings[srso_mitigation], (has_microcode ? "" : ", no microcode"));
+out:
+ pr_info("%s%s\n", srso_strings[srso_mitigation], has_microcode ? "" : ", no microcode");

pred_cmd:
if ((!boot_cpu_has_bug(X86_BUG_SRSO) || srso_cmd == SRSO_CMD_OFF) &&
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