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[PULL,01/20] target/i386: EPYC-Rome model without XSAVES

Message ID 20230525141532.295817-2-pbonzini@redhat.com
State New
Headers show
Series [PULL,01/20] target/i386: EPYC-Rome model without XSAVES | expand

Commit Message

Paolo Bonzini May 25, 2023, 2:15 p.m. UTC 
From: Maksim Davydov <davydov-max@yandex-team.ru>

Based on the kernel commit "b0563468ee x86/CPU/AMD: Disable XSAVES on
AMD family 0x17", host system with EPYC-Rome can clear XSAVES capability
bit. In another words, EPYC-Rome host without XSAVES can occur. Thus, we
need an EPYC-Rome cpu model (without this feature) that matches the
solution of fixing this erratum

Signed-off-by: Maksim Davydov <davydov-max@yandex-team.ru>
Message-Id: <20230524213748.8918-1-davydov-max@yandex-team.ru>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/cpu.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
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Patch

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index a61cd6d99d1f..1242bd541a53 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -4466,6 +4466,16 @@  static const X86CPUDefinition builtin_x86_defs[] = {
                 },
                 .cache_info = &epyc_rome_v3_cache_info
             },
+            {
+                .version = 4,
+                .props = (PropValue[]) {
+                    /* Erratum 1386 */
+                    { "model-id",
+                      "AMD EPYC-Rome-v4 Processor (no XSAVES)" },
+                    { "xsaves", "off" },
+                    { /* end of list */ }
+                },
+            },
             { /* end of list */ }
         }
     },