From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 218F2349B15 for ; Wed, 29 Apr 2026 17:50:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777485042; cv=none; b=Ozhm8PIE6DAooCv+kwr8Hca+NzU7pE0Vv0UywWt2ppgAlgt+S83t+a87eoyXGdKtxiOTKP0M0iEe6poepxS7vkrXBlaJsMI9eS/nr7YDtJQ2PIq8EotOISxKczWTUKLnrlssrCtDF3+FLk25Gfys+9oRljR5uQ2YV1qeXtFJfyE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777485042; c=relaxed/simple; bh=PViq9J/NzX6wIHs+vw63klec3/IuQrCe3CTrigJOQk0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=IslFjVPLo7G4Gw6nsdZoiAt3qUaGVU1TeVzTDC6wJ+KYxW3jknJNPO9Z4VkohEd4OQ+/rbN6Scx9YRixSIUxaCQGfr/OYMDYpOCK1tPYtPMCrklKvhW1rl6aUtA4BGQ6RrtraR1q1JVRYFBgeBwihOOI303Kjy5ZKnXCUhH9/To= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=q5SYUFtg; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="q5SYUFtg" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F19A6C2BCC4; Wed, 29 Apr 2026 17:50:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777485041; bh=PViq9J/NzX6wIHs+vw63klec3/IuQrCe3CTrigJOQk0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=q5SYUFtgD974Z9twX5nQ4BYXk9NJ8W61NgTs2H7cQtYgWaqQVqfwXcUegC7LTzzI9 wceYPZ1Ean27HLNdCUjs0q+2w6GegUvjiJlL4T2X8ZO7wwj0x198OWB84oiX16xJjT 3+9zEW5awyFA8ueOIAlifRNqsMxMVb3ro5M1iLem3s9sj76+/r01P+AyjXoHkiN+qE 03NDlakNdzrg4IJdoYRjhHjEPGT95RdFMwChBetgqAEN+r0BAbFAH9jggGw+j56Bb3 X9XihNDH97XRunVhRnbJ/cuVuIRIQP+2X+j3bU4Ylh1pwZ0knem+1+pPuuv0FjkG5u 9QXkvuf6yvv+g== From: Sasha Levin To: stable@vger.kernel.org Cc: Daniil Tatianin , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Peter Zijlstra , Josh Poimboeuf , Pawan Gupta , Greg Kroah-Hartman , Tom Lendacky , "Xin Li (Intel)" , Daniel Sneddon , "Ahmed S. Darwish" , Nikunj A Dadhania , Sean Christopherson Subject: Re: [PATCH 6.6.y v1 0/6] SRSO handling for Zen5 CPUs Date: Wed, 29 Apr 2026 13:50:36 -0400 Message-ID: <20260429171550.srso-zen5-6.6.y@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260428214610.2138600-1-d-tatianin@yandex-team.ru> References: <20260428214610.2138600-1-d-tatianin@yandex-team.ru> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On Wed, Apr 29, 2026 at 12:46:04AM +0300, Daniil Tatianin wrote: > This series backports a few SRSO handling features for Zen5 CPUs from the > mainline kernel. The only important ones are > "x86/bugs: KVM: Add support for SRSO_MSR_FIX" and > "x86/bugs: Add SRSO_USER_KERNEL_NO support". The rest are added to avoid > conflicts when applying the aforementioned patches. > > Changes since v0: > - Add e3417ab75ab2 ("KVM: SVM: Set/clear SRSO's BP_SPEC_REDUCE on 0 <=> 1 VM count transitions") > to fix a performance regression introduced by 8442df2b49ed ("x86/bugs: KVM: Add support for SRSO_MSR_FIX") > (Suggested by Sean Christopherson) Sean, are you OK with this 6.6.y backport as it stands? -- Thanks, Sasha