x86/mm: Update comment in detect_tme() regarding x86_phys_bits

[mirror_ubuntu-jammy-kernel.git] / arch / x86 / kernel / cpu / intel.c

diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index b862067bb33c2152484f3c581701fc5722e8670e..6106d11ceb6bbba5961d3e27b62c16056261b652 100644 (file)
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -105,7 +105,7 @@ static void probe_xeon_phi_r3mwait(struct cpuinfo_x86 *c)
 /*
  * Early microcode releases for the Spectre v2 mitigation were broken.
  * Information taken from;
- * - https://newsroom.intel.com/wp-content/uploads/sites/11/2018/01/microcode-update-guidance.pdf
+ * - https://newsroom.intel.com/wp-content/uploads/sites/11/2018/03/microcode-update-guidance.pdf
  * - https://kb.vmware.com/s/article/52345
  * - Microcode revisions observed in the wild
  * - Release note from 20180108 microcode release
@@ -123,7 +123,6 @@ static const struct sku_microcode spectre_bad_microcodes[] = {
        { INTEL_FAM6_KABYLAKE_MOBILE,   0x09,   0x80 },
        { INTEL_FAM6_SKYLAKE_X,         0x03,   0x0100013e },
        { INTEL_FAM6_SKYLAKE_X,         0x04,   0x0200003c },
-       { INTEL_FAM6_SKYLAKE_DESKTOP,   0x03,   0xc2 },
        { INTEL_FAM6_BROADWELL_CORE,    0x04,   0x28 },
        { INTEL_FAM6_BROADWELL_GT3E,    0x01,   0x1b },
        { INTEL_FAM6_BROADWELL_XEON_D,  0x02,   0x14 },
@@ -588,11 +587,8 @@ detect_keyid_bits:
        }
 
        /*
-        * Exclude KeyID bits from physical address bits.
-        *
-        * We have to do this even if we are not going to use KeyID bits
-        * ourself. VM guests still have to know that these bits are not usable
-        * for physical address.
+        * KeyID bits effectively lower the number of physical address
+        * bits.  Update cpuinfo_x86::x86_phys_bits accordingly.
         */
        c->x86_phys_bits -= keyid_bits;
 }