Message ID | 1696011549-28036-5-git-send-email-mikelley@microsoft.com |
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State | New |
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Series |
x86/coco: Mark CoCo VM pages not present when changing encrypted state
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Commit Message
Michael Kelley (LINUX)
Sept. 29, 2023, 6:19 p.m. UTC
__set_memory_enc_pgtable() is only called from __set_memory_enc_dec()
after doing a simple validation check. Prior to commit 812b0597fb40,
__set_memory_enc_dec() did more complex checking, but now the code
can be simplified by collapsing the two functions.
No functional change.
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
---
arch/x86/mm/pat/set_memory.c | 15 +++++----------
1 file changed, 5 insertions(+), 10 deletions(-)
diff --git a/arch/x86/mm/pat/set_memory.c b/arch/x86/mm/pat/set_memory.c index d062e01..1578077 100644 --- a/arch/x86/mm/pat/set_memory.c +++ b/arch/x86/mm/pat/set_memory.c @@ -2131,15 +2131,18 @@ int set_memory_global(unsigned long addr, int numpages) } /* - * __set_memory_enc_pgtable() is used for the hypervisors that get + * __set_memory_enc_dec() is used for the hypervisors that get * informed about "encryption" status via page tables. */ -static int __set_memory_enc_pgtable(unsigned long addr, int numpages, bool enc) +static int __set_memory_enc_dec(unsigned long addr, int numpages, bool enc) { pgprot_t empty = __pgprot(0); struct cpa_data cpa; int ret; + if (!cc_platform_has(CC_ATTR_MEM_ENCRYPT)) + return 0; + /* Should not be working on unaligned addresses */ if (WARN_ONCE(addr & ~PAGE_MASK, "misaligned address: %#lx\n", addr)) addr &= PAGE_MASK; @@ -2200,14 +2203,6 @@ static int __set_memory_enc_pgtable(unsigned long addr, int numpages, bool enc) return set_memory_p(&addr, numpages); } -static int __set_memory_enc_dec(unsigned long addr, int numpages, bool enc) -{ - if (cc_platform_has(CC_ATTR_MEM_ENCRYPT)) - return __set_memory_enc_pgtable(addr, numpages, enc); - - return 0; -} - int set_memory_encrypted(unsigned long addr, int numpages) { return __set_memory_enc_dec(addr, numpages, true);