diff options
| author | Ard Biesheuvel <ardb@kernel.org> | 2025-08-28 12:22:11 +0200 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2025-09-03 17:58:22 +0200 |
| commit | 00d25566761746ba53934ad3a89ea79923a38d01 (patch) | |
| tree | 1a653b1b3c4954aa9f6812a7546906ad299516dd /arch/x86/boot/compressed | |
| parent | d5949ea50c5642ab7e3c4dd6020e23725c079b25 (diff) | |
x86/sev: Pass SVSM calling area down to early page state change API
The early page state change API is mostly only used very early, when only the
boot time SVSM calling area is in use. However, this API is also called by the
kexec finishing code, which runs very late, and potentially from a different
CPU (which uses a different calling area).
To avoid pulling the per-CPU SVSM calling area pointers and related SEV state
into the startup code, refactor the page state change API so the SVSM calling
area virtual and physical addresses can be provided by the caller.
No functional change intended.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/20250828102202.1849035-32-ardb+git@google.com
Diffstat (limited to 'arch/x86/boot/compressed')
| -rw-r--r-- | arch/x86/boot/compressed/sev.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/arch/x86/boot/compressed/sev.c b/arch/x86/boot/compressed/sev.c index 6b62c75ea911..0e567410d24d 100644 --- a/arch/x86/boot/compressed/sev.c +++ b/arch/x86/boot/compressed/sev.c @@ -62,18 +62,30 @@ static bool sev_snp_enabled(void) void snp_set_page_private(unsigned long paddr) { + struct psc_desc d = { + SNP_PAGE_STATE_PRIVATE, + (struct svsm_ca *)boot_svsm_caa_pa, + boot_svsm_caa_pa + }; + if (!sev_snp_enabled()) return; - __page_state_change(paddr, paddr, SNP_PAGE_STATE_PRIVATE); + __page_state_change(paddr, paddr, &d); } void snp_set_page_shared(unsigned long paddr) { + struct psc_desc d = { + SNP_PAGE_STATE_SHARED, + (struct svsm_ca *)boot_svsm_caa_pa, + boot_svsm_caa_pa + }; + if (!sev_snp_enabled()) return; - __page_state_change(paddr, paddr, SNP_PAGE_STATE_SHARED); + __page_state_change(paddr, paddr, &d); } bool early_setup_ghcb(void) @@ -98,8 +110,14 @@ bool early_setup_ghcb(void) void snp_accept_memory(phys_addr_t start, phys_addr_t end) { + struct psc_desc d = { + SNP_PAGE_STATE_PRIVATE, + (struct svsm_ca *)boot_svsm_caa_pa, + boot_svsm_caa_pa + }; + for (phys_addr_t pa = start; pa < end; pa += PAGE_SIZE) - __page_state_change(pa, pa, SNP_PAGE_STATE_PRIVATE); + __page_state_change(pa, pa, &d); } void sev_es_shutdown_ghcb(void) |