Messages in this thread Patch in this message | | | From | Tom Lendacky <> | Subject | [RFC PATCH v1 05/18] x86: Handle reduction in physical address size with SME | Date | Tue, 26 Apr 2016 17:56:47 -0500 |
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When System Memory Encryption (SME) is enabled, the physical address space is reduced. Adjust the x86_phys_bits value to reflect this reduction.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> --- arch/x86/kernel/cpu/common.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 6bfa36d..b49e7fc 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -43,6 +43,7 @@ #include <asm/pat.h> #include <asm/microcode.h> #include <asm/microcode_intel.h> +#include <asm/mem_encrypt.h> #ifdef CONFIG_X86_LOCAL_APIC #include <asm/uv/uv.h> @@ -722,6 +723,7 @@ void get_cpu_cap(struct cpuinfo_x86 *c) c->x86_virt_bits = (eax >> 8) & 0xff; c->x86_phys_bits = eax & 0xff; + c->x86_phys_bits -= sme_get_me_loss(); c->x86_capability[CPUID_8000_0008_EBX] = ebx; } #ifdef CONFIG_X86_32
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