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x86/hyperv: use helpers to read control registers in hv_snp_boot_ap()

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Use native_read_cr*() helpers to read control registers into vmsa->cr*
instead of open-coded assembly.

No functional change intended, unless there was a purpose to specifying
rax.

Signed-off-by: Yosry Ahmed <yosryahmed@google.com>
Link: https://lore.kernel.org/r/20240805201247.427982-1-yosryahmed@google.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <20240805201247.427982-1-yosryahmed@google.com>
This commit is contained in:
Yosry Ahmed 2024-08-05 20:12:47 +00:00 committed by Wei Liu
parent 87c9741a38
commit 0b5530861e
1 changed files with 3 additions and 3 deletions
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6
arch/x86/hyperv/ivm.c
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@ -321,9 +321,9 @@ int hv_snp_boot_ap(u32 cpu, unsigned long start_ip)
vmsa->efer = native_read_msr(MSR_EFER);
asm volatile("movq %%cr4, %%rax;" : "=a" (vmsa->cr4));
asm volatile("movq %%cr3, %%rax;" : "=a" (vmsa->cr3));
asm volatile("movq %%cr0, %%rax;" : "=a" (vmsa->cr0));
vmsa->cr4 = native_read_cr4();
vmsa->cr3 = __native_read_cr3();
vmsa->cr0 = native_read_cr0();
vmsa->xcr0 = 1;
vmsa->g_pat = HV_AP_INIT_GPAT_DEFAULT;