60 lines
1.8 KiB
Diff
60 lines
1.8 KiB
Diff
From 56498baf2eddf072b9dcab7570febc6ce8f58504 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= <berrange@redhat.com>
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Date: Thu, 29 Jun 2023 17:51:03 +0100
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Subject: [PATCH] virt-what-cvm: support alternative cpuid leaf ordering
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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The HyperV CPUID leaf for reporting the vendor string has an
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alternative ordering of ecx/edx.
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Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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(cherry picked from commit 15d3e4a92fd9c1490fb6f86b7ab3a2dff8364837)
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---
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virt-what-cvm.c | 11 +++++++----
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1 file changed, 7 insertions(+), 4 deletions(-)
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diff --git a/virt-what-cvm.c b/virt-what-cvm.c
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index f1847688b..1e7c50bb0 100644
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--- a/virt-what-cvm.c
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+++ b/virt-what-cvm.c
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@@ -209,11 +209,14 @@ cpuid (uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx)
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static uint32_t
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-cpuid_leaf (uint32_t eax, char *sig)
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+cpuid_leaf (uint32_t eax, char *sig, bool swapped)
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{
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uint32_t *sig32 = (uint32_t *) sig;
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- cpuid (&eax, &sig32[0], &sig32[2], &sig32[1]);
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+ if (swapped)
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+ cpuid (&eax, &sig32[0], &sig32[2], &sig32[1]);
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+ else
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+ cpuid (&eax, &sig32[0], &sig32[1], &sig32[2]);
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sig[12] = 0; /* \0-terminate the string to make string comparison possible */
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debug("CPUID sig %s\n", sig);
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return eax;
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@@ -335,7 +338,7 @@ cpu_sig_intel (void)
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return;
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memset (sig, 0, sizeof sig);
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- cpuid_leaf (CPUID_INTEL_TDX_ENUMERATION, sig);
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+ cpuid_leaf (CPUID_INTEL_TDX_ENUMERATION, sig, true);
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if (memcmp (sig, CPUID_SIG_INTEL_TDX, sizeof(sig)) == 0)
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puts ("intel-tdx");
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@@ -368,7 +371,7 @@ cpu_sig (void)
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return;
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memset (sig, 0, sizeof sig);
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- cpuid_leaf (0, sig);
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+ cpuid_leaf (0, sig, true);
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if (memcmp (sig, CPUID_SIG_AMD, sizeof(sig)) == 0)
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cpu_sig_amd ();
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--
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2.43.0
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