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x86/sev, crypto/ccp: Move HSAVE_PA setup to arch/x86/

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Now that there is snp_prepare() that indicates when the CCP driver wants to
prepare the architecture for SNP_INIT(_EX), move this architecture-specific
bit of code to a more sensible place.

Signed-off-by: Tycho Andersen (AMD) <tycho@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://patch.msgid.link/20260324161301.1353976-6-tycho@kernel.org
This commit is contained in:
Tycho Andersen (AMD)
2026-03-24 10:12:59 -06:00
committed by Borislav Petkov (AMD)
parent 299933b118
commit 7b2bc5f0ab
2 changed files with 8 additions and 8 deletions
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8
arch/x86/virt/svm/sev.c
View File

@@ -506,6 +506,11 @@ static bool __init setup_rmptable(void)
return true;
}
static void clear_hsave_pa(void *arg)
{
wrmsrq(MSR_VM_HSAVE_PA, 0);
}
void snp_prepare(void)
{
u64 val;
@@ -529,6 +534,9 @@ void snp_prepare(void)
on_each_cpu(mfd_reconfigure, (void *)1, 1);
on_each_cpu(snp_enable, NULL, 1);
/* SNP_INIT requires MSR_VM_HSAVE_PA to be cleared on all CPUs. */
on_each_cpu(clear_hsave_pa, NULL, 1);
cpus_read_unlock();
}
EXPORT_SYMBOL_FOR_MODULES(snp_prepare, "ccp");

8
drivers/crypto/ccp/sev-dev.c
View File

@@ -1076,11 +1076,6 @@ static inline int __sev_do_init_locked(int *psp_ret)
return __sev_init_locked(psp_ret);
}
static void snp_set_hsave_pa(void *arg)
{
wrmsrq(MSR_VM_HSAVE_PA, 0);
}
/* Hypervisor Fixed pages API interface */
static void snp_hv_fixed_pages_state_update(struct sev_device *sev,
enum snp_hv_fixed_pages_state page_state)
@@ -1375,9 +1370,6 @@ static int __sev_snp_init_locked(int *error, unsigned int max_snp_asid)
snp_prepare();
/* SNP_INIT requires MSR_VM_HSAVE_PA to be cleared on all CPUs. */
on_each_cpu(snp_set_hsave_pa, NULL, 1);
/*
* Starting in SNP firmware v1.52, the SNP_INIT_EX command takes a list
* of system physical address ranges to convert into HV-fixed page