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Merge pull request #1405 from dp-arm/dp/cve_2017_5715 

Fast path SMCCC_ARCH_WORKAROUND_1 calls from AArch32
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Dimitris Papastamos 2018-06-08 11:47:13 +01:00 committed by GitHub
parent 83685de911 2b91536625
commit 31ece1e025
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 12 additions and 11 deletions
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23
lib/cpus/aarch64/wa_cve_2017_5715_mmu.S
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@ -12,10 +12,11 @@
.globl wa_cve_2017_5715_mmu_vbar .globl wa_cve_2017_5715_mmu_vbar
#define ESR_EL3_A64_SMC0 0x5e000000 #define ESR_EL3_A64_SMC0 0x5e000000
#define ESR_EL3_A32_SMC0 0x4e000000
vector_base wa_cve_2017_5715_mmu_vbar vector_base wa_cve_2017_5715_mmu_vbar
.macro apply_cve_2017_5715_wa _is_sync_exception .macro apply_cve_2017_5715_wa _is_sync_exception _esr_el3_val
stp x0, x1, [sp, #CTX_GPREGS_OFFSET + CTX_GPREG_X0] stp x0, x1, [sp, #CTX_GPREGS_OFFSET + CTX_GPREG_X0]
mrs x1, sctlr_el3 mrs x1, sctlr_el3
/* Disable MMU */ /* Disable MMU */
@ -32,7 +33,7 @@ vector_base wa_cve_2017_5715_mmu_vbar
*/ */
/* /*
* Ensure SMC is coming from A64 state on #0 * Ensure SMC is coming from A64/A32 state on #0
* with W0 = SMCCC_ARCH_WORKAROUND_1 * with W0 = SMCCC_ARCH_WORKAROUND_1
* *
* This sequence evaluates as: * This sequence evaluates as:
@ -43,7 +44,7 @@ vector_base wa_cve_2017_5715_mmu_vbar
orr w1, wzr, #SMCCC_ARCH_WORKAROUND_1 orr w1, wzr, #SMCCC_ARCH_WORKAROUND_1
cmp w0, w1 cmp w0, w1
mrs x0, esr_el3 mrs x0, esr_el3
mov_imm w1, ESR_EL3_A64_SMC0 mov_imm w1, \_esr_el3_val
ccmp w0, w1, #0, eq ccmp w0, w1, #0, eq
/* Static predictor will predict a fall through */ /* Static predictor will predict a fall through */
bne 1f bne 1f
@ -104,22 +105,22 @@ vector_entry mmu_serror_sp_elx
* --------------------------------------------------------------------- * ---------------------------------------------------------------------
*/ */
vector_entry mmu_sync_exception_aarch64 vector_entry mmu_sync_exception_aarch64
apply_cve_2017_5715_wa _is_sync_exception=1 apply_cve_2017_5715_wa _is_sync_exception=1 _esr_el3_val=ESR_EL3_A64_SMC0
b sync_exception_aarch64 b sync_exception_aarch64
check_vector_size mmu_sync_exception_aarch64 check_vector_size mmu_sync_exception_aarch64
vector_entry mmu_irq_aarch64 vector_entry mmu_irq_aarch64
apply_cve_2017_5715_wa _is_sync_exception=0 apply_cve_2017_5715_wa _is_sync_exception=0 _esr_el3_val=ESR_EL3_A64_SMC0
b irq_aarch64 b irq_aarch64
check_vector_size mmu_irq_aarch64 check_vector_size mmu_irq_aarch64
vector_entry mmu_fiq_aarch64 vector_entry mmu_fiq_aarch64
apply_cve_2017_5715_wa _is_sync_exception=0 apply_cve_2017_5715_wa _is_sync_exception=0 _esr_el3_val=ESR_EL3_A64_SMC0
b fiq_aarch64 b fiq_aarch64
check_vector_size mmu_fiq_aarch64 check_vector_size mmu_fiq_aarch64
vector_entry mmu_serror_aarch64 vector_entry mmu_serror_aarch64
apply_cve_2017_5715_wa _is_sync_exception=0 apply_cve_2017_5715_wa _is_sync_exception=0 _esr_el3_val=ESR_EL3_A64_SMC0
b serror_aarch64 b serror_aarch64
check_vector_size mmu_serror_aarch64 check_vector_size mmu_serror_aarch64
@ -128,21 +129,21 @@ vector_entry mmu_serror_aarch64
* --------------------------------------------------------------------- * ---------------------------------------------------------------------
*/ */
vector_entry mmu_sync_exception_aarch32 vector_entry mmu_sync_exception_aarch32
apply_cve_2017_5715_wa _is_sync_exception=1 apply_cve_2017_5715_wa _is_sync_exception=1 _esr_el3_val=ESR_EL3_A32_SMC0
b sync_exception_aarch32 b sync_exception_aarch32
check_vector_size mmu_sync_exception_aarch32 check_vector_size mmu_sync_exception_aarch32
vector_entry mmu_irq_aarch32 vector_entry mmu_irq_aarch32
apply_cve_2017_5715_wa _is_sync_exception=0 apply_cve_2017_5715_wa _is_sync_exception=0 _esr_el3_val=ESR_EL3_A32_SMC0
b irq_aarch32 b irq_aarch32
check_vector_size mmu_irq_aarch32 check_vector_size mmu_irq_aarch32
vector_entry mmu_fiq_aarch32 vector_entry mmu_fiq_aarch32
apply_cve_2017_5715_wa _is_sync_exception=0 apply_cve_2017_5715_wa _is_sync_exception=0 _esr_el3_val=ESR_EL3_A32_SMC0
b fiq_aarch32 b fiq_aarch32
check_vector_size mmu_fiq_aarch32 check_vector_size mmu_fiq_aarch32
vector_entry mmu_serror_aarch32 vector_entry mmu_serror_aarch32
apply_cve_2017_5715_wa _is_sync_exception=0 apply_cve_2017_5715_wa _is_sync_exception=0 _esr_el3_val=ESR_EL3_A32_SMC0
b serror_aarch32 b serror_aarch32
check_vector_size mmu_serror_aarch32 check_vector_size mmu_serror_aarch32