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Date:   Fri, 11 Mar 2022 12:37:09 +0000
From:   Boris Petkov <bp@alien8.de>
To:     Bharata B Rao <bharata@amd.com>, linux-kernel@vger.kernel.org
CC:     linux-mm@kvack.org, x86@kernel.org, shuah@kernel.org,
        kirill.shutemov@linux.intel.com, tglx@linutronix.de,
        dave.hansen@linux.intel.com, will@kernel.org, mingo@redhat.com,
        oleg@redhat.com, catalin.marinas@arm.com, ananth.narayan@amd.com
Subject: Re: [RFC PATCH v0 3/6] x86: Enable Upper Address Ignore(UAI) feature
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>diff --git a/arch/x86/kernel/setup=2Ec b/arch/x86/kernel/setup=2Ec
>index f7a132eb794d=2E=2E12615b1b4af5 100644
>--- a/arch/x86/kernel/setup=2Ec
>+++ b/arch/x86/kernel/setup=2Ec
>@@ -740,6 +740,12 @@ dump_kernel_offset(struct notifier_block *self, unsi=
gned long v, void *p)
> 	return 0;
> }
>=20
>+static inline void __init uai_enable(void)
>+{
>+	if (boot_cpu_has(X86_FEATURE_UAI))

cpu_feature_enabled

>+		msr_set_bit(MSR_EFER, _EFER_UAI);
>+}


--=20
Sent from a small device: formatting sux and brevity is inevitable=2E